diff --git a/docs/i2c_driver.md b/docs/i2c_driver.md
index faff0a1d7b..2457e8e7b9 100644
--- a/docs/i2c_driver.md
+++ b/docs/i2c_driver.md
@@ -197,11 +197,11 @@ Receive multiple bytes from the selected I2C device.
 
 ---
 
-### `i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout)` :id=api-i2c-writereg
+### `i2c_status_t i2c_write_register(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout)` :id=api-i2c-write-register
 
 Writes to a register with an 8-bit address on the I2C device.
 
-#### Arguments :id=api-i2c-writereg-arguments
+#### Arguments :id=api-i2c-write-register-arguments
 
  - `uint8_t devaddr`  
    The 7-bit I2C address of the device.
@@ -214,17 +214,17 @@ Writes to a register with an 8-bit address on the I2C device.
  - `uint16_t timeout`  
    The time in milliseconds to wait for a response from the target device.
 
-#### Return Value :id=api-i2c-writereg-return
+#### Return Value :id=api-i2c-write-register-return
 
 `I2C_STATUS_TIMEOUT` if the timeout period elapses, `I2C_STATUS_ERROR` if some other error occurs, otherwise `I2C_STATUS_SUCCESS`.
 
 ---
 
-### `i2c_status_t i2c_writeReg16(uint8_t devaddr, uint16_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout)` :id=api-i2c-writereg16
+### `i2c_status_t i2c_write_register16(uint8_t devaddr, uint16_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout)` :id=api-i2c-write-register16
 
 Writes to a register with a 16-bit address (big endian) on the I2C device.
 
-#### Arguments :id=api-i2c-writereg16-arguments
+#### Arguments :id=api-i2c-write-register16-arguments
 
  - `uint8_t devaddr`  
    The 7-bit I2C address of the device.
@@ -237,17 +237,17 @@ Writes to a register with a 16-bit address (big endian) on the I2C device.
  - `uint16_t timeout`  
    The time in milliseconds to wait for a response from the target device.
 
-#### Return Value :id=api-i2c-writereg16-return
+#### Return Value :id=api-i2c-write-register16-return
 
 `I2C_STATUS_TIMEOUT` if the timeout period elapses, `I2C_STATUS_ERROR` if some other error occurs, otherwise `I2C_STATUS_SUCCESS`.
 
 ---
 
-### `i2c_status_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout)` :id=api-i2c-readreg
+### `i2c_status_t i2c_read_register(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout)` :id=api-i2c-read-register
 
 Reads from a register with an 8-bit address on the I2C device.
 
-#### Arguments :id=api-i2c-readreg-arguments
+#### Arguments :id=api-i2c-read-register-arguments
 
  - `uint8_t devaddr`  
    The 7-bit I2C address of the device.
@@ -258,17 +258,17 @@ Reads from a register with an 8-bit address on the I2C device.
  - `uint16_t timeout`  
    The time in milliseconds to wait for a response from the target device.
 
-#### Return Value :id=api-i2c-readreg-return
+#### Return Value :id=api-i2c-read-register-return
 
 `I2C_STATUS_TIMEOUT` if the timeout period elapses, `I2C_STATUS_ERROR` if some other error occurs, otherwise `I2C_STATUS_SUCCESS`.
 
 ---
 
-### `i2c_status_t i2c_readReg16(uint8_t devaddr, uint16_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout)`
+### `i2c_status_t i2c_read_register16(uint8_t devaddr, uint16_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout)` :id=api-i2c-read-register16
 
 Reads from a register with a 16-bit address (big endian) on the I2C device.
 
-#### Arguments :id=api-i2c-readreg16-arguments
+#### Arguments :id=api-i2c-read-register16-arguments
 
  - `uint8_t devaddr`  
    The 7-bit I2C address of the device.
@@ -279,7 +279,7 @@ Reads from a register with a 16-bit address (big endian) on the I2C device.
  - `uint16_t timeout`  
    The time in milliseconds to wait for a response from the target device.
 
-#### Return Value :id=api-i2c-readreg16-return
+#### Return Value :id=api-i2c-read-register16-return
 
 `I2C_STATUS_TIMEOUT` if the timeout period elapses, `I2C_STATUS_ERROR` if some other error occurs, otherwise `I2C_STATUS_SUCCESS`.
 
diff --git a/drivers/gpio/mcp23018.c b/drivers/gpio/mcp23018.c
index 41cbfe087e..3eca4f9d34 100644
--- a/drivers/gpio/mcp23018.c
+++ b/drivers/gpio/mcp23018.c
@@ -33,13 +33,13 @@ bool mcp23018_set_config(uint8_t slave_addr, mcp23018_port_t port, uint8_t conf)
     uint8_t cmdDirection = port ? CMD_IODIRB : CMD_IODIRA;
     uint8_t cmdPullup    = port ? CMD_GPPUB : CMD_GPPUA;
 
-    i2c_status_t ret = i2c_writeReg(addr, cmdDirection, &conf, sizeof(conf), TIMEOUT);
+    i2c_status_t ret = i2c_write_register(addr, cmdDirection, &conf, sizeof(conf), TIMEOUT);
     if (ret != I2C_STATUS_SUCCESS) {
         dprintf("mcp23018_set_config::directionFAILED::%u\n", ret);
         return false;
     }
 
-    ret = i2c_writeReg(addr, cmdPullup, &conf, sizeof(conf), TIMEOUT);
+    ret = i2c_write_register(addr, cmdPullup, &conf, sizeof(conf), TIMEOUT);
     if (ret != I2C_STATUS_SUCCESS) {
         dprintf("mcp23018_set_config::pullupFAILED::%u\n", ret);
         return false;
@@ -52,7 +52,7 @@ bool mcp23018_set_output(uint8_t slave_addr, mcp23018_port_t port, uint8_t conf)
     uint8_t addr = SLAVE_TO_ADDR(slave_addr);
     uint8_t cmd  = port ? CMD_GPIOB : CMD_GPIOA;
 
-    i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
+    i2c_status_t ret = i2c_write_register(addr, cmd, &conf, sizeof(conf), TIMEOUT);
     if (ret != I2C_STATUS_SUCCESS) {
         dprintf("mcp23018_set_output::FAILED::%u\n", ret);
         return false;
@@ -65,7 +65,7 @@ bool mcp23018_set_output_all(uint8_t slave_addr, uint8_t confA, uint8_t confB) {
     uint8_t addr    = SLAVE_TO_ADDR(slave_addr);
     uint8_t conf[2] = {confA, confB};
 
-    i2c_status_t ret = i2c_writeReg(addr, CMD_GPIOA, &conf[0], sizeof(conf), TIMEOUT);
+    i2c_status_t ret = i2c_write_register(addr, CMD_GPIOA, &conf[0], sizeof(conf), TIMEOUT);
     if (ret != I2C_STATUS_SUCCESS) {
         dprintf("mcp23018_set_output::FAILED::%u\n", ret);
         return false;
@@ -78,7 +78,7 @@ bool mcp23018_readPins(uint8_t slave_addr, mcp23018_port_t port, uint8_t* out) {
     uint8_t addr = SLAVE_TO_ADDR(slave_addr);
     uint8_t cmd  = port ? CMD_GPIOB : CMD_GPIOA;
 
-    i2c_status_t ret = i2c_readReg(addr, cmd, out, sizeof(uint8_t), TIMEOUT);
+    i2c_status_t ret = i2c_read_register(addr, cmd, out, sizeof(uint8_t), TIMEOUT);
     if (ret != I2C_STATUS_SUCCESS) {
         dprintf("mcp23018_readPins::FAILED::%u\n", ret);
         return false;
@@ -97,7 +97,7 @@ bool mcp23018_readPins_all(uint8_t slave_addr, uint16_t* out) {
 
     data16 data = {.u16 = 0};
 
-    i2c_status_t ret = i2c_readReg(addr, CMD_GPIOA, &data.u8[0], sizeof(data), TIMEOUT);
+    i2c_status_t ret = i2c_read_register(addr, CMD_GPIOA, &data.u8[0], sizeof(data), TIMEOUT);
     if (ret != I2C_STATUS_SUCCESS) {
         dprintf("mcp23018_readPins::FAILED::%u\n", ret);
         return false;
diff --git a/drivers/gpio/pca9505.c b/drivers/gpio/pca9505.c
index 5803746c96..4a11724ecf 100644
--- a/drivers/gpio/pca9505.c
+++ b/drivers/gpio/pca9505.c
@@ -66,7 +66,7 @@ bool pca9505_set_config(uint8_t slave_addr, pca9505_port_t port, uint8_t conf) {
             break;
     }
 
-    i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
+    i2c_status_t ret = i2c_write_register(addr, cmd, &conf, sizeof(conf), TIMEOUT);
     if (ret != I2C_STATUS_SUCCESS) {
         print("pca9505_set_config::FAILED\n");
         return false;
@@ -96,7 +96,7 @@ bool pca9505_set_polarity(uint8_t slave_addr, pca9505_port_t port, uint8_t conf)
             break;
     }
 
-    i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
+    i2c_status_t ret = i2c_write_register(addr, cmd, &conf, sizeof(conf), TIMEOUT);
     if (ret != I2C_STATUS_SUCCESS) {
         print("pca9505_set_polarity::FAILED\n");
         return false;
@@ -126,7 +126,7 @@ bool pca9505_set_output(uint8_t slave_addr, pca9505_port_t port, uint8_t conf) {
             break;
     }
 
-    i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
+    i2c_status_t ret = i2c_write_register(addr, cmd, &conf, sizeof(conf), TIMEOUT);
     if (ret != I2C_STATUS_SUCCESS) {
         print("pca9505_set_output::FAILED\n");
         return false;
@@ -156,7 +156,7 @@ bool pca9505_readPins(uint8_t slave_addr, pca9505_port_t port, uint8_t* out) {
             break;
     }
 
-    i2c_status_t ret = i2c_readReg(addr, cmd, out, sizeof(uint8_t), TIMEOUT);
+    i2c_status_t ret = i2c_read_register(addr, cmd, out, sizeof(uint8_t), TIMEOUT);
     if (ret != I2C_STATUS_SUCCESS) {
         print("pca9505_readPins::FAILED\n");
         return false;
diff --git a/drivers/gpio/pca9555.c b/drivers/gpio/pca9555.c
index adcd040083..23727d21b3 100644
--- a/drivers/gpio/pca9555.c
+++ b/drivers/gpio/pca9555.c
@@ -37,7 +37,7 @@ bool pca9555_set_config(uint8_t slave_addr, pca9555_port_t port, uint8_t conf) {
     uint8_t addr = SLAVE_TO_ADDR(slave_addr);
     uint8_t cmd  = port ? CMD_CONFIG_1 : CMD_CONFIG_0;
 
-    i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
+    i2c_status_t ret = i2c_write_register(addr, cmd, &conf, sizeof(conf), TIMEOUT);
     if (ret != I2C_STATUS_SUCCESS) {
         print("pca9555_set_config::FAILED\n");
         return false;
@@ -50,7 +50,7 @@ bool pca9555_set_output(uint8_t slave_addr, pca9555_port_t port, uint8_t conf) {
     uint8_t addr = SLAVE_TO_ADDR(slave_addr);
     uint8_t cmd  = port ? CMD_OUTPUT_1 : CMD_OUTPUT_0;
 
-    i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
+    i2c_status_t ret = i2c_write_register(addr, cmd, &conf, sizeof(conf), TIMEOUT);
     if (ret != I2C_STATUS_SUCCESS) {
         print("pca9555_set_output::FAILED\n");
         return false;
@@ -63,7 +63,7 @@ bool pca9555_set_output_all(uint8_t slave_addr, uint8_t confA, uint8_t confB) {
     uint8_t addr    = SLAVE_TO_ADDR(slave_addr);
     uint8_t conf[2] = {confA, confB};
 
-    i2c_status_t ret = i2c_writeReg(addr, CMD_OUTPUT_0, &conf[0], sizeof(conf), TIMEOUT);
+    i2c_status_t ret = i2c_write_register(addr, CMD_OUTPUT_0, &conf[0], sizeof(conf), TIMEOUT);
     if (ret != I2C_STATUS_SUCCESS) {
         dprintf("pca9555_set_output::FAILED::%u\n", ret);
         return false;
@@ -76,7 +76,7 @@ bool pca9555_readPins(uint8_t slave_addr, pca9555_port_t port, uint8_t* out) {
     uint8_t addr = SLAVE_TO_ADDR(slave_addr);
     uint8_t cmd  = port ? CMD_INPUT_1 : CMD_INPUT_0;
 
-    i2c_status_t ret = i2c_readReg(addr, cmd, out, sizeof(uint8_t), TIMEOUT);
+    i2c_status_t ret = i2c_read_register(addr, cmd, out, sizeof(uint8_t), TIMEOUT);
     if (ret != I2C_STATUS_SUCCESS) {
         print("pca9555_readPins::FAILED\n");
         return false;
@@ -95,7 +95,7 @@ bool pca9555_readPins_all(uint8_t slave_addr, uint16_t* out) {
 
     data16 data = {.u16 = 0};
 
-    i2c_status_t ret = i2c_readReg(addr, CMD_INPUT_0, &data.u8[0], sizeof(data), TIMEOUT);
+    i2c_status_t ret = i2c_read_register(addr, CMD_INPUT_0, &data.u8[0], sizeof(data), TIMEOUT);
     if (ret != I2C_STATUS_SUCCESS) {
         print("pca9555_readPins_all::FAILED\n");
         return false;
diff --git a/drivers/haptic/drv2605l.c b/drivers/haptic/drv2605l.c
index 1ad2ad385f..a5adde5366 100644
--- a/drivers/haptic/drv2605l.c
+++ b/drivers/haptic/drv2605l.c
@@ -29,7 +29,7 @@ void drv2605l_write(uint8_t reg_addr, uint8_t data) {
 }
 
 uint8_t drv2605l_read(uint8_t reg_addr) {
-    i2c_readReg(DRV2605L_I2C_ADDRESS << 1, reg_addr, &drv2605l_read_buffer, 1, 100);
+    i2c_read_register(DRV2605L_I2C_ADDRESS << 1, reg_addr, &drv2605l_read_buffer, 1, 100);
 
     return drv2605l_read_buffer;
 }
diff --git a/drivers/oled/oled_driver.c b/drivers/oled/oled_driver.c
index 4a2121cd7c..c674675d11 100644
--- a/drivers/oled/oled_driver.c
+++ b/drivers/oled/oled_driver.c
@@ -253,7 +253,7 @@ __attribute__((weak)) bool oled_send_data(const uint8_t *data, uint16_t size) {
     spi_stop();
     return true;
 #elif defined(OLED_TRANSPORT_I2C)
-    i2c_status_t status = i2c_writeReg((OLED_DISPLAY_ADDRESS << 1), I2C_DATA, data, size, OLED_I2C_TIMEOUT);
+    i2c_status_t status = i2c_write_register((OLED_DISPLAY_ADDRESS << 1), I2C_DATA, data, size, OLED_I2C_TIMEOUT);
     return (status == I2C_STATUS_SUCCESS);
 #endif
 }
diff --git a/drivers/sensors/azoteq_iqs5xx.c b/drivers/sensors/azoteq_iqs5xx.c
index 521f558b5f..1d688ddf25 100644
--- a/drivers/sensors/azoteq_iqs5xx.c
+++ b/drivers/sensors/azoteq_iqs5xx.c
@@ -107,18 +107,18 @@ static struct {
 
 i2c_status_t azoteq_iqs5xx_wake(void) {
     uint8_t      data   = 0;
-    i2c_status_t status = i2c_readReg16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_PREVIOUS_CYCLE_TIME, (uint8_t *)&data, sizeof(data), 1);
+    i2c_status_t status = i2c_read_register16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_PREVIOUS_CYCLE_TIME, (uint8_t *)&data, sizeof(data), 1);
     i2c_stop();
     wait_us(150);
     return status;
 }
 i2c_status_t azoteq_iqs5xx_end_session(void) {
     const uint8_t END_BYTE = 1; // any data
-    return i2c_writeReg16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_END_COMMS, &END_BYTE, 1, AZOTEQ_IQS5XX_TIMEOUT_MS);
+    return i2c_write_register16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_END_COMMS, &END_BYTE, 1, AZOTEQ_IQS5XX_TIMEOUT_MS);
 }
 
 i2c_status_t azoteq_iqs5xx_get_base_data(azoteq_iqs5xx_base_data_t *base_data) {
-    i2c_status_t status = i2c_readReg16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_PREVIOUS_CYCLE_TIME, (uint8_t *)base_data, 10, AZOTEQ_IQS5XX_TIMEOUT_MS);
+    i2c_status_t status = i2c_read_register16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_PREVIOUS_CYCLE_TIME, (uint8_t *)base_data, 10, AZOTEQ_IQS5XX_TIMEOUT_MS);
     if (status == I2C_STATUS_SUCCESS) {
         azoteq_iqs5xx_end_session();
     }
@@ -131,7 +131,7 @@ i2c_status_t azoteq_iqs5xx_get_report_rate(azoteq_iqs5xx_report_rate_t *report_r
         return I2C_STATUS_ERROR;
     }
     uint16_t     selected_reg = AZOTEQ_IQS5XX_REG_REPORT_RATE_ACTIVE + (2 * mode);
-    i2c_status_t status       = i2c_readReg16(AZOTEQ_IQS5XX_ADDRESS, selected_reg, (uint8_t *)report_rate, 2, AZOTEQ_IQS5XX_TIMEOUT_MS);
+    i2c_status_t status       = i2c_read_register16(AZOTEQ_IQS5XX_ADDRESS, selected_reg, (uint8_t *)report_rate, 2, AZOTEQ_IQS5XX_TIMEOUT_MS);
     if (end_session) {
         azoteq_iqs5xx_end_session();
     }
@@ -147,7 +147,7 @@ i2c_status_t azoteq_iqs5xx_set_report_rate(uint16_t report_rate_ms, azoteq_iqs5x
     azoteq_iqs5xx_report_rate_t report_rate  = {0};
     report_rate.h                            = (uint8_t)((report_rate_ms >> 8) & 0xFF);
     report_rate.l                            = (uint8_t)(report_rate_ms & 0xFF);
-    i2c_status_t status                      = i2c_writeReg16(AZOTEQ_IQS5XX_ADDRESS, selected_reg, (uint8_t *)&report_rate, 2, AZOTEQ_IQS5XX_TIMEOUT_MS);
+    i2c_status_t status                      = i2c_write_register16(AZOTEQ_IQS5XX_ADDRESS, selected_reg, (uint8_t *)&report_rate, 2, AZOTEQ_IQS5XX_TIMEOUT_MS);
     if (end_session) {
         azoteq_iqs5xx_end_session();
     }
@@ -156,10 +156,10 @@ i2c_status_t azoteq_iqs5xx_set_report_rate(uint16_t report_rate_ms, azoteq_iqs5x
 
 i2c_status_t azoteq_iqs5xx_set_reati(bool enabled, bool end_session) {
     azoteq_iqs5xx_system_config_0_t config = {0};
-    i2c_status_t                    status = i2c_readReg16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_SYSTEM_CONFIG_0, (uint8_t *)&config, sizeof(azoteq_iqs5xx_system_config_0_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
+    i2c_status_t                    status = i2c_read_register16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_SYSTEM_CONFIG_0, (uint8_t *)&config, sizeof(azoteq_iqs5xx_system_config_0_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
     if (status == I2C_STATUS_SUCCESS) {
         config.reati = enabled;
-        status       = i2c_writeReg16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_SYSTEM_CONFIG_0, (uint8_t *)&config, sizeof(azoteq_iqs5xx_system_config_0_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
+        status       = i2c_write_register16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_SYSTEM_CONFIG_0, (uint8_t *)&config, sizeof(azoteq_iqs5xx_system_config_0_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
     }
     if (end_session) {
         azoteq_iqs5xx_end_session();
@@ -169,7 +169,7 @@ i2c_status_t azoteq_iqs5xx_set_reati(bool enabled, bool end_session) {
 
 i2c_status_t azoteq_iqs5xx_set_event_mode(bool enabled, bool end_session) {
     azoteq_iqs5xx_system_config_1_t config = {0};
-    i2c_status_t                    status = i2c_readReg16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_SYSTEM_CONFIG_1, (uint8_t *)&config, sizeof(azoteq_iqs5xx_system_config_1_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
+    i2c_status_t                    status = i2c_read_register16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_SYSTEM_CONFIG_1, (uint8_t *)&config, sizeof(azoteq_iqs5xx_system_config_1_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
     if (status == I2C_STATUS_SUCCESS) {
         config.event_mode     = enabled;
         config.touch_event    = true;
@@ -179,7 +179,7 @@ i2c_status_t azoteq_iqs5xx_set_event_mode(bool enabled, bool end_session) {
         config.reati_event    = false;
         config.alp_prox_event = false;
         config.gesture_event  = true;
-        status                = i2c_writeReg16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_SYSTEM_CONFIG_1, (uint8_t *)&config, sizeof(azoteq_iqs5xx_system_config_1_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
+        status                = i2c_write_register16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_SYSTEM_CONFIG_1, (uint8_t *)&config, sizeof(azoteq_iqs5xx_system_config_1_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
     }
     if (end_session) {
         azoteq_iqs5xx_end_session();
@@ -189,7 +189,7 @@ i2c_status_t azoteq_iqs5xx_set_event_mode(bool enabled, bool end_session) {
 
 i2c_status_t azoteq_iqs5xx_set_gesture_config(bool end_session) {
     azoteq_iqs5xx_gesture_config_t config = {0};
-    i2c_status_t                   status = i2c_readReg16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_SINGLE_FINGER_GESTURES, (uint8_t *)&config, sizeof(azoteq_iqs5xx_gesture_config_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
+    i2c_status_t                   status = i2c_read_register16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_SINGLE_FINGER_GESTURES, (uint8_t *)&config, sizeof(azoteq_iqs5xx_gesture_config_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
     pd_dprintf("azo scroll: %d\n", config.multi_finger_gestures.scroll);
     if (status == I2C_STATUS_SUCCESS) {
         config.single_finger_gestures.single_tap     = AZOTEQ_IQS5XX_TAP_ENABLE;
@@ -211,7 +211,7 @@ i2c_status_t azoteq_iqs5xx_set_gesture_config(bool end_session) {
         config.scroll_initial_distance               = AZOTEQ_IQS5XX_SWAP_H_L_BYTES(AZOTEQ_IQS5XX_SCROLL_INITIAL_DISTANCE);
         config.zoom_initial_distance                 = AZOTEQ_IQS5XX_SWAP_H_L_BYTES(AZOTEQ_IQS5XX_ZOOM_INITIAL_DISTANCE);
         config.zoom_consecutive_distance             = AZOTEQ_IQS5XX_SWAP_H_L_BYTES(AZOTEQ_IQS5XX_ZOOM_CONSECUTIVE_DISTANCE);
-        status                                       = i2c_writeReg16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_SINGLE_FINGER_GESTURES, (uint8_t *)&config, sizeof(azoteq_iqs5xx_gesture_config_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
+        status                                       = i2c_write_register16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_SINGLE_FINGER_GESTURES, (uint8_t *)&config, sizeof(azoteq_iqs5xx_gesture_config_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
     }
     if (end_session) {
         azoteq_iqs5xx_end_session();
@@ -221,7 +221,7 @@ i2c_status_t azoteq_iqs5xx_set_gesture_config(bool end_session) {
 
 i2c_status_t azoteq_iqs5xx_set_xy_config(bool flip_x, bool flip_y, bool switch_xy, bool palm_reject, bool end_session) {
     azoteq_iqs5xx_xy_config_0_t config = {0};
-    i2c_status_t                status = i2c_readReg16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_XY_CONFIG_0, (uint8_t *)&config, sizeof(azoteq_iqs5xx_xy_config_0_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
+    i2c_status_t                status = i2c_read_register16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_XY_CONFIG_0, (uint8_t *)&config, sizeof(azoteq_iqs5xx_xy_config_0_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
     if (status == I2C_STATUS_SUCCESS) {
         if (flip_x) {
             config.flip_x = !config.flip_x;
@@ -233,7 +233,7 @@ i2c_status_t azoteq_iqs5xx_set_xy_config(bool flip_x, bool flip_y, bool switch_x
             config.switch_xy_axis = !config.switch_xy_axis;
         }
         config.palm_reject = palm_reject;
-        status             = i2c_writeReg16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_XY_CONFIG_0, (uint8_t *)&config, sizeof(azoteq_iqs5xx_xy_config_0_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
+        status             = i2c_write_register16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_XY_CONFIG_0, (uint8_t *)&config, sizeof(azoteq_iqs5xx_xy_config_0_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
     }
     if (end_session) {
         azoteq_iqs5xx_end_session();
@@ -243,11 +243,11 @@ i2c_status_t azoteq_iqs5xx_set_xy_config(bool flip_x, bool flip_y, bool switch_x
 
 i2c_status_t azoteq_iqs5xx_reset_suspend(bool reset, bool suspend, bool end_session) {
     azoteq_iqs5xx_system_control_1_t config = {0};
-    i2c_status_t                     status = i2c_readReg16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_SYSTEM_CONTROL_1, (uint8_t *)&config, sizeof(azoteq_iqs5xx_system_control_1_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
+    i2c_status_t                     status = i2c_read_register16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_SYSTEM_CONTROL_1, (uint8_t *)&config, sizeof(azoteq_iqs5xx_system_control_1_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
     if (status == I2C_STATUS_SUCCESS) {
         config.reset   = reset;
         config.suspend = suspend;
-        status         = i2c_writeReg16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_SYSTEM_CONTROL_1, (uint8_t *)&config, sizeof(azoteq_iqs5xx_system_control_1_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
+        status         = i2c_write_register16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_SYSTEM_CONTROL_1, (uint8_t *)&config, sizeof(azoteq_iqs5xx_system_control_1_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
     }
     if (end_session) {
         azoteq_iqs5xx_end_session();
@@ -260,14 +260,14 @@ void azoteq_iqs5xx_set_cpi(uint16_t cpi) {
         azoteq_iqs5xx_resolution_t resolution = {0};
         resolution.x_resolution               = AZOTEQ_IQS5XX_SWAP_H_L_BYTES(MIN(azoteq_iqs5xx_device_resolution_t.resolution_x, AZOTEQ_IQS5XX_INCH_TO_RESOLUTION_X(cpi)));
         resolution.y_resolution               = AZOTEQ_IQS5XX_SWAP_H_L_BYTES(MIN(azoteq_iqs5xx_device_resolution_t.resolution_y, AZOTEQ_IQS5XX_INCH_TO_RESOLUTION_Y(cpi)));
-        i2c_writeReg16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_X_RESOLUTION, (uint8_t *)&resolution, sizeof(azoteq_iqs5xx_resolution_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
+        i2c_write_register16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_X_RESOLUTION, (uint8_t *)&resolution, sizeof(azoteq_iqs5xx_resolution_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
     }
 }
 
 uint16_t azoteq_iqs5xx_get_cpi(void) {
     if (azoteq_iqs5xx_product_number != AZOTEQ_IQS5XX_UNKNOWN) {
         azoteq_iqs5xx_resolution_t resolution = {0};
-        i2c_status_t               status     = i2c_readReg16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_X_RESOLUTION, (uint8_t *)&resolution, sizeof(azoteq_iqs5xx_resolution_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
+        i2c_status_t               status     = i2c_read_register16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_X_RESOLUTION, (uint8_t *)&resolution, sizeof(azoteq_iqs5xx_resolution_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
         if (status == I2C_STATUS_SUCCESS) {
             return AZOTEQ_IQS5XX_RESOLUTION_X_TO_INCH(AZOTEQ_IQS5XX_SWAP_H_L_BYTES(resolution.x_resolution));
         }
@@ -276,7 +276,7 @@ uint16_t azoteq_iqs5xx_get_cpi(void) {
 }
 
 uint16_t azoteq_iqs5xx_get_product(void) {
-    i2c_status_t status = i2c_readReg16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_PRODUCT_NUMBER, (uint8_t *)&azoteq_iqs5xx_product_number, sizeof(uint16_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
+    i2c_status_t status = i2c_read_register16(AZOTEQ_IQS5XX_ADDRESS, AZOTEQ_IQS5XX_REG_PRODUCT_NUMBER, (uint8_t *)&azoteq_iqs5xx_product_number, sizeof(uint16_t), AZOTEQ_IQS5XX_TIMEOUT_MS);
     if (status == I2C_STATUS_SUCCESS) {
         azoteq_iqs5xx_product_number = AZOTEQ_IQS5XX_SWAP_H_L_BYTES(azoteq_iqs5xx_product_number);
     }
diff --git a/drivers/sensors/cirque_pinnacle_i2c.c b/drivers/sensors/cirque_pinnacle_i2c.c
index 3c11e5f079..c9b9bece5f 100644
--- a/drivers/sensors/cirque_pinnacle_i2c.c
+++ b/drivers/sensors/cirque_pinnacle_i2c.c
@@ -14,9 +14,9 @@ extern bool touchpad_init;
 void RAP_ReadBytes(uint8_t address, uint8_t* data, uint8_t count) {
     uint8_t cmdByte = READ_MASK | address; // Form the READ command byte
     if (touchpad_init) {
-        i2c_writeReg(CIRQUE_PINNACLE_ADDR << 1, cmdByte, NULL, 0, CIRQUE_PINNACLE_TIMEOUT);
-        if (i2c_readReg(CIRQUE_PINNACLE_ADDR << 1, cmdByte, data, count, CIRQUE_PINNACLE_TIMEOUT) != I2C_STATUS_SUCCESS) {
-            pd_dprintf("error cirque_pinnacle i2c_readReg\n");
+        i2c_write_register(CIRQUE_PINNACLE_ADDR << 1, cmdByte, NULL, 0, CIRQUE_PINNACLE_TIMEOUT);
+        if (i2c_read_register(CIRQUE_PINNACLE_ADDR << 1, cmdByte, data, count, CIRQUE_PINNACLE_TIMEOUT) != I2C_STATUS_SUCCESS) {
+            pd_dprintf("error cirque_pinnacle i2c_read_register\n");
             touchpad_init = false;
         }
         i2c_stop();
@@ -28,8 +28,8 @@ void RAP_Write(uint8_t address, uint8_t data) {
     uint8_t cmdByte = WRITE_MASK | address; // Form the WRITE command byte
 
     if (touchpad_init) {
-        if (i2c_writeReg(CIRQUE_PINNACLE_ADDR << 1, cmdByte, &data, sizeof(data), CIRQUE_PINNACLE_TIMEOUT) != I2C_STATUS_SUCCESS) {
-            pd_dprintf("error cirque_pinnacle i2c_writeReg\n");
+        if (i2c_write_register(CIRQUE_PINNACLE_ADDR << 1, cmdByte, &data, sizeof(data), CIRQUE_PINNACLE_TIMEOUT) != I2C_STATUS_SUCCESS) {
+            pd_dprintf("error cirque_pinnacle i2c_write_register\n");
             touchpad_init = false;
         }
         i2c_stop();
diff --git a/drivers/sensors/pimoroni_trackball.c b/drivers/sensors/pimoroni_trackball.c
index 326e59744f..9c6d26d73d 100644
--- a/drivers/sensors/pimoroni_trackball.c
+++ b/drivers/sensors/pimoroni_trackball.c
@@ -56,13 +56,13 @@ void pimoroni_trackball_set_cpi(uint16_t cpi) {
 
 void pimoroni_trackball_set_rgbw(uint8_t r, uint8_t g, uint8_t b, uint8_t w) {
     uint8_t                              data[4] = {r, g, b, w};
-    __attribute__((unused)) i2c_status_t status  = i2c_writeReg(PIMORONI_TRACKBALL_ADDRESS << 1, PIMORONI_TRACKBALL_REG_LED_RED, data, sizeof(data), PIMORONI_TRACKBALL_TIMEOUT);
+    __attribute__((unused)) i2c_status_t status  = i2c_write_register(PIMORONI_TRACKBALL_ADDRESS << 1, PIMORONI_TRACKBALL_REG_LED_RED, data, sizeof(data), PIMORONI_TRACKBALL_TIMEOUT);
 
     pd_dprintf("Trackball RGBW i2c_status_t: %d\n", status);
 }
 
 i2c_status_t read_pimoroni_trackball(pimoroni_data_t* data) {
-    i2c_status_t status = i2c_readReg(PIMORONI_TRACKBALL_ADDRESS << 1, PIMORONI_TRACKBALL_REG_LEFT, (uint8_t*)data, sizeof(*data), PIMORONI_TRACKBALL_TIMEOUT);
+    i2c_status_t status = i2c_read_register(PIMORONI_TRACKBALL_ADDRESS << 1, PIMORONI_TRACKBALL_REG_LEFT, (uint8_t*)data, sizeof(*data), PIMORONI_TRACKBALL_TIMEOUT);
 
 #ifdef POINTING_DEVICE_DEBUG
     static uint16_t d_timer;
diff --git a/keyboards/3w6/rev1/matrix.c b/keyboards/3w6/rev1/matrix.c
index 8bb6c77aaa..aa3e43fbe0 100644
--- a/keyboards/3w6/rev1/matrix.c
+++ b/keyboards/3w6/rev1/matrix.c
@@ -70,7 +70,7 @@ uint8_t init_tca9555(void) {
         // This means: we will write on pins 0 to 2 on port 1. read rest
         0b11111000,
     };
-    tca9555_status = i2c_writeReg(I2C_ADDR, IODIRA, conf, 2, I2C_TIMEOUT);
+    tca9555_status = i2c_write_register(I2C_ADDR, IODIRA, conf, 2, I2C_TIMEOUT);
 
     return tca9555_status;
 }
@@ -189,7 +189,7 @@ static matrix_row_t read_cols(uint8_t row) {
         } else {
             uint8_t data     = 0;
             uint8_t ports[2] = {0};
-            tca9555_status = i2c_readReg(I2C_ADDR, IREGP0, ports, 2, I2C_TIMEOUT);
+            tca9555_status = i2c_read_register(I2C_ADDR, IREGP0, ports, 2, I2C_TIMEOUT);
             if (tca9555_status) {  // if there was an error
                 // do nothing
                 return 0;
@@ -252,7 +252,7 @@ static void select_row(uint8_t row) {
             }
 
             uint8_t ports[2] = {port0, port1};
-            tca9555_status = i2c_writeReg(I2C_ADDR, OREGP0, ports, 2, I2C_TIMEOUT);
+            tca9555_status = i2c_write_register(I2C_ADDR, OREGP0, ports, 2, I2C_TIMEOUT);
             // Select the desired row by writing a byte for the entire GPIOB bus where only the bit representing the row we want to select is a zero (write instruction) and every other bit is a one.
             // Note that the row - MATRIX_ROWS_PER_SIDE reflects the fact that being on the right hand, the columns are numbered from MATRIX_ROWS_PER_SIDE to MATRIX_ROWS, but the pins we want to write to are indexed from zero up on the GPIOB bus.
         }
diff --git a/keyboards/3w6/rev2/keymaps/default_pimoroni/pimoroni_trackball.c b/keyboards/3w6/rev2/keymaps/default_pimoroni/pimoroni_trackball.c
index a6661cdc07..35a85b5476 100644
--- a/keyboards/3w6/rev2/keymaps/default_pimoroni/pimoroni_trackball.c
+++ b/keyboards/3w6/rev2/keymaps/default_pimoroni/pimoroni_trackball.c
@@ -120,7 +120,7 @@ bool pointing_device_task(void) {
     static uint16_t debounce_timer;
     uint8_t         state[5] = {};
     if (timer_elapsed(i2c_timeout_timer) > I2C_WAITCHECK) {
-        if (i2c_readReg(TRACKBALL_WRITE, 0x04, state, 5, I2C_TIMEOUT) == I2C_STATUS_SUCCESS) {
+        if (i2c_read_register(TRACKBALL_WRITE, 0x04, state, 5, I2C_TIMEOUT) == I2C_STATUS_SUCCESS) {
             if (!state[4] && !debounce) {
                 if (scrolling) {
 #ifdef PIMORONI_TRACKBALL_INVERT_X
diff --git a/keyboards/3w6/rev2/matrix.c b/keyboards/3w6/rev2/matrix.c
index 49cb09a9f8..da7a5344e5 100644
--- a/keyboards/3w6/rev2/matrix.c
+++ b/keyboards/3w6/rev2/matrix.c
@@ -70,7 +70,7 @@ uint8_t init_tca9555(void) {
         // This means: we will write on pins 0 to 3 on port 1. read rest
         0b11110000,
     };
-    tca9555_status = i2c_writeReg(I2C_ADDR, IODIRA, conf, 2, I2C_TIMEOUT);
+    tca9555_status = i2c_write_register(I2C_ADDR, IODIRA, conf, 2, I2C_TIMEOUT);
 
     return tca9555_status;
 }
@@ -189,7 +189,7 @@ static matrix_row_t read_cols(uint8_t row) {
         } else {
             uint8_t data    = 0;
             uint8_t port0   = 0;
-            tca9555_status  = i2c_readReg(I2C_ADDR, IREGP0, &port0, 1, I2C_TIMEOUT);
+            tca9555_status  = i2c_read_register(I2C_ADDR, IREGP0, &port0, 1, I2C_TIMEOUT);
             if (tca9555_status) {  // if there was an error
                 // do nothing
                 return 0;
@@ -250,7 +250,7 @@ static void select_row(uint8_t row) {
                 default:                    break;
             }
 
-            tca9555_status = i2c_writeReg(I2C_ADDR, OREGP1, &port1, 1, I2C_TIMEOUT);
+            tca9555_status = i2c_write_register(I2C_ADDR, OREGP1, &port1, 1, I2C_TIMEOUT);
             // Select the desired row by writing a byte for the entire GPIOB bus where only the bit representing the row we want to select is a zero (write instruction) and every other bit is a one.
             // Note that the row - MATRIX_ROWS_PER_SIDE reflects the fact that being on the right hand, the columns are numbered from MATRIX_ROWS_PER_SIDE to MATRIX_ROWS, but the pins we want to write to are indexed from zero up on the GPIOB bus.
         }
diff --git a/keyboards/argyle/matrix.c b/keyboards/argyle/matrix.c
index 7430c6d9d8..d723392a01 100644
--- a/keyboards/argyle/matrix.c
+++ b/keyboards/argyle/matrix.c
@@ -78,9 +78,9 @@ static void init_pins(void) {
     unselect_rows();
     // Set I/O
     uint8_t send_data = 0xFF;
-    i2c_writeReg((PORT_EXPANDER_ADDRESS << 1), 0x00, &send_data, 1, 20);
+    i2c_write_register((PORT_EXPANDER_ADDRESS << 1), 0x00, &send_data, 1, 20);
     // Set Pull-up
-    i2c_writeReg((PORT_EXPANDER_ADDRESS << 1), 0x06, &send_data, 1, 20);
+    i2c_write_register((PORT_EXPANDER_ADDRESS << 1), 0x06, &send_data, 1, 20);
 
     for (uint8_t x = 0; x < MATRIX_COLS; x++) {
         if (col_pins[x] != NO_PIN) {
@@ -111,7 +111,7 @@ static bool matrix_read_cols_on_row(matrix_row_t current_matrix[], uint8_t curre
     matrix_output_select_delay();
 
     uint8_t port_expander_buffer;
-    i2c_readReg((PORT_EXPANDER_ADDRESS << 1), 0x09, &port_expander_buffer, 1, 20);
+    i2c_read_register((PORT_EXPANDER_ADDRESS << 1), 0x09, &port_expander_buffer, 1, 20);
 
     // For each col...
     // matrix_row_t row_shifter = MATRIX_ROW_SHIFTER;
diff --git a/keyboards/barleycorn_smd/matrix.c b/keyboards/barleycorn_smd/matrix.c
index b717452f3d..315093c8a9 100644
--- a/keyboards/barleycorn_smd/matrix.c
+++ b/keyboards/barleycorn_smd/matrix.c
@@ -42,9 +42,9 @@ static void init_pins(void) {
     unselect_rows();
     // Set I/O
     uint8_t send_data[2] = { 0xFF, 0x03};
-    i2c_writeReg((PORT_EXPANDER_ADDRESS << 1), 0x00, &send_data[0], 2, 20);
+    i2c_write_register((PORT_EXPANDER_ADDRESS << 1), 0x00, &send_data[0], 2, 20);
     // Set Pull-up
-    i2c_writeReg((PORT_EXPANDER_ADDRESS << 1), 0x0C, &send_data[0], 2, 20);
+    i2c_write_register((PORT_EXPANDER_ADDRESS << 1), 0x0C, &send_data[0], 2, 20);
 
     for (uint8_t x = 0; x < MATRIX_COLS; x++) {
         if ( x < 8 ) {
@@ -75,7 +75,7 @@ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
     matrix_io_delay();
 
     uint8_t port_expander_col_buffer[2];
-    i2c_readReg((PORT_EXPANDER_ADDRESS << 1), 0x12, &port_expander_col_buffer[0], 2, 20);
+    i2c_read_register((PORT_EXPANDER_ADDRESS << 1), 0x12, &port_expander_col_buffer[0], 2, 20);
 
     // For each col...
     for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
diff --git a/keyboards/ergodox_stm32/ergodox_stm32.c b/keyboards/ergodox_stm32/ergodox_stm32.c
index 2a919506dc..99d51866f7 100644
--- a/keyboards/ergodox_stm32/ergodox_stm32.c
+++ b/keyboards/ergodox_stm32/ergodox_stm32.c
@@ -59,16 +59,16 @@ uint8_t init_mcp23017(void) {
     uint8_t data[2];
     data[0] = 0x0;
     data[1] = 0b00111111;
-    mcp23017_status = i2c_writeReg(I2C_ADDR, I2C_IODIRA, data, 2, 50000);
+    mcp23017_status = i2c_write_register(I2C_ADDR, I2C_IODIRA, data, 2, 50000);
     if (mcp23017_status) goto out;
     data[0] = 0xFFU;
-    mcp23017_status = i2c_writeReg(I2C_ADDR, I2C_GPIOA, data, 1, 5000);
+    mcp23017_status = i2c_write_register(I2C_ADDR, I2C_GPIOA, data, 1, 5000);
     if (mcp23017_status) goto out;
-    mcp23017_status = i2c_writeReg(I2C_ADDR, I2C_GPPUB, data+1, 1, 2);
+    mcp23017_status = i2c_write_register(I2C_ADDR, I2C_GPPUB, data+1, 1, 2);
     if (mcp23017_status) goto out;
 
  out:
     return mcp23017_status;
-    // i2c_readReg(I2C_ADDR, );
+    // i2c_read_register(I2C_ADDR, );
 }
 
diff --git a/keyboards/ergodox_stm32/matrix.c b/keyboards/ergodox_stm32/matrix.c
index 3eb35cd7bb..6acd2dda22 100644
--- a/keyboards/ergodox_stm32/matrix.c
+++ b/keyboards/ergodox_stm32/matrix.c
@@ -134,7 +134,7 @@ static matrix_row_t read_cols(uint8_t row) {
     uint8_t data = 0xFF;
     if (!mcp23017_status) {
       uint8_t regAddr = I2C_GPIOB;
-      mcp23017_status = i2c_readReg(I2C_ADDR, regAddr, &data, 1, 10);
+      mcp23017_status = i2c_read_register(I2C_ADDR, regAddr, &data, 1, 10);
     }
     if (mcp23017_status) {
       return 0;
@@ -174,7 +174,7 @@ static void select_row(uint8_t row) {
   if (row < MATRIX_ROWS_PER_SIDE) {
     if (!mcp23017_status) {
       uint8_t data = (0xFF & ~(1 << row));
-      mcp23017_status = i2c_writeReg(I2C_ADDR, I2C_GPIOA, &data, 1, 10);
+      mcp23017_status = i2c_write_register(I2C_ADDR, I2C_GPIOA, &data, 1, 10);
     }
   } else {
     GPIOB->BRR = 0x1 << (row+1);
diff --git a/keyboards/fc660c/ad5258.c b/keyboards/fc660c/ad5258.c
index f7ff2f3dc1..9d33c10ce4 100644
--- a/keyboards/fc660c/ad5258.c
+++ b/keyboards/fc660c/ad5258.c
@@ -35,18 +35,18 @@ void ad5258_init(void) {
 uint8_t ad5258_read_rdac(void) {
     // read RDAC register
     uint8_t ret = 0;
-    i2c_readReg(AD5258_I2C_ADDRESS, AD5258_INST_RDAC, &ret, 1, 100);
+    i2c_read_register(AD5258_I2C_ADDRESS, AD5258_INST_RDAC, &ret, 1, 100);
     return ret;
 }
 
 uint8_t ad5258_read_eeprom(void) {
     uint8_t ret = 0;
-    i2c_readReg(AD5258_I2C_ADDRESS, AD5258_INST_EEPROM, &ret, 1, 100);
+    i2c_read_register(AD5258_I2C_ADDRESS, AD5258_INST_EEPROM, &ret, 1, 100);
     return ret;
 }
 
 void ad5258_write_rdac(uint8_t rdac) {
     // write RDAC register:
     uint8_t data = rdac & 0x3F;
-    i2c_writeReg(AD5258_I2C_ADDRESS, AD5258_INST_RDAC, &data, 1, 100);
+    i2c_write_register(AD5258_I2C_ADDRESS, AD5258_INST_RDAC, &data, 1, 100);
 }
diff --git a/keyboards/fc980c/ad5258.c b/keyboards/fc980c/ad5258.c
index f7ff2f3dc1..9d33c10ce4 100644
--- a/keyboards/fc980c/ad5258.c
+++ b/keyboards/fc980c/ad5258.c
@@ -35,18 +35,18 @@ void ad5258_init(void) {
 uint8_t ad5258_read_rdac(void) {
     // read RDAC register
     uint8_t ret = 0;
-    i2c_readReg(AD5258_I2C_ADDRESS, AD5258_INST_RDAC, &ret, 1, 100);
+    i2c_read_register(AD5258_I2C_ADDRESS, AD5258_INST_RDAC, &ret, 1, 100);
     return ret;
 }
 
 uint8_t ad5258_read_eeprom(void) {
     uint8_t ret = 0;
-    i2c_readReg(AD5258_I2C_ADDRESS, AD5258_INST_EEPROM, &ret, 1, 100);
+    i2c_read_register(AD5258_I2C_ADDRESS, AD5258_INST_EEPROM, &ret, 1, 100);
     return ret;
 }
 
 void ad5258_write_rdac(uint8_t rdac) {
     // write RDAC register:
     uint8_t data = rdac & 0x3F;
-    i2c_writeReg(AD5258_I2C_ADDRESS, AD5258_INST_RDAC, &data, 1, 100);
+    i2c_write_register(AD5258_I2C_ADDRESS, AD5258_INST_RDAC, &data, 1, 100);
 }
diff --git a/keyboards/frobiac/blackbowl/matrix.c b/keyboards/frobiac/blackbowl/matrix.c
index 727e26ddc1..2a2c2618ab 100644
--- a/keyboards/frobiac/blackbowl/matrix.c
+++ b/keyboards/frobiac/blackbowl/matrix.c
@@ -45,10 +45,10 @@ void matrix_init_custom(void) {
     uint8_t pullup[2]    = {0, expander_input_mask};
 
     for (uint8_t i = 0; i < 2; ++i) {
-        expander_status = i2c_writeReg(i2c_addr[i], IODIRA, direction, 2, I2C_TIMEOUT);
+        expander_status = i2c_write_register(i2c_addr[i], IODIRA, direction, 2, I2C_TIMEOUT);
         if (expander_status) return;
 
-        expander_status = i2c_writeReg(i2c_addr[i], GPPUA, pullup, 2, I2C_TIMEOUT);
+        expander_status = i2c_write_register(i2c_addr[i], GPPUA, pullup, 2, I2C_TIMEOUT);
     }
 }
 
@@ -79,7 +79,7 @@ static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
     // On both expanders: select col and read rows
     for (size_t i = 0; i < 2; ++i) {
         if (!expander_status) {
-            expander_status = i2c_writeReg(i2c_addr[i], EXPANDER_COL_REGISTER, &port, 1, I2C_TIMEOUT);
+            expander_status = i2c_write_register(i2c_addr[i], EXPANDER_COL_REGISTER, &port, 1, I2C_TIMEOUT);
         }
         wait_us(30);
 
@@ -87,7 +87,7 @@ static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
             return false;
         }
 
-        expander_status = i2c_readReg(i2c_addr[i], EXPANDER_ROW_REGISTER, &column_state[i], 1, I2C_TIMEOUT);
+        expander_status = i2c_read_register(i2c_addr[i], EXPANDER_ROW_REGISTER, &column_state[i], 1, I2C_TIMEOUT);
         column_state[i] = (~column_state[i]) & ((1 << MATRIX_ROWS_PER_SIDE) - 1);
     }
 
diff --git a/keyboards/handwired/d48/ds1307.c b/keyboards/handwired/d48/ds1307.c
index f6b57d50d2..2b3a88f315 100644
--- a/keyboards/handwired/d48/ds1307.c
+++ b/keyboards/handwired/d48/ds1307.c
@@ -8,12 +8,12 @@ void ds1307_set_time(uint8_t h, uint8_t m, uint8_t s) {
         ((h % 10) | ((h / 10) << 4)) & 0x3F,
         0, 0, 0, 0, 0
     }; // 24-hour mode
-    i2c_writeReg(DS1307_ADDR, 0, data, 8, 100);
+    i2c_write_register(DS1307_ADDR, 0, data, 8, 100);
 }
 
 void ds1307_get_time(uint8_t *h, uint8_t *m, uint8_t *s) {
     uint8_t data[3];
-    i2c_readReg(DS1307_ADDR, 0, data, 3, 100);
+    i2c_read_register(DS1307_ADDR, 0, data, 3, 100);
     i2c_stop();
     *s = (data[0] & 0b1111) + ((data[0] & 0b1110000) >> 4) * 10;
     *m = (data[1] & 0b1111) + ((data[1] & 0b1110000) >> 4) * 10;
diff --git a/keyboards/handwired/dactyl/matrix.c b/keyboards/handwired/dactyl/matrix.c
index d87fe4cbd1..140f4236c1 100644
--- a/keyboards/handwired/dactyl/matrix.c
+++ b/keyboards/handwired/dactyl/matrix.c
@@ -216,10 +216,10 @@ void init_expander(void) {
 #endif
 
 
-    expander_status = i2c_writeReg(I2C_ADDR, IODIRA, direction, 2, I2C_TIMEOUT);
+    expander_status = i2c_write_register(I2C_ADDR, IODIRA, direction, 2, I2C_TIMEOUT);
     if (expander_status) return;
 
-    expander_status = i2c_writeReg(I2C_ADDR, GPPUA, pullup, 2, I2C_TIMEOUT);
+    expander_status = i2c_write_register(I2C_ADDR, GPPUA, pullup, 2, I2C_TIMEOUT);
 }
 
 uint8_t matrix_scan(void)
@@ -333,7 +333,7 @@ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
     // Read columns from expander, unless it's in an error state
     if (! expander_status) {
         uint8_t state = 0;
-        expander_status = i2c_readReg(I2C_ADDR, EXPANDER_COL_REGISTER, &state, 1, I2C_TIMEOUT);
+        expander_status = i2c_read_register(I2C_ADDR, EXPANDER_COL_REGISTER, &state, 1, I2C_TIMEOUT);
         if (! expander_status) {
             current_matrix[current_row] |= (~state) & expander_input_pin_mask;
         }
@@ -359,7 +359,7 @@ static void select_row(uint8_t row) {
         // set active row low  : 0
         // set other rows hi-Z : 1
         uint8_t port = 0xFF & ~(1<<row);
-        expander_status = i2c_writeReg(I2C_ADDR, EXPANDER_ROW_REGISTER, &port, 1, I2C_TIMEOUT);
+        expander_status = i2c_write_register(I2C_ADDR, EXPANDER_ROW_REGISTER, &port, 1, I2C_TIMEOUT);
     }
 
     // select on teensy
@@ -415,7 +415,7 @@ static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
             return false;
         }
 
-        expander_status = i2c_readReg(I2C_ADDR, EXPANDER_ROW_REGISTER, &column_state, 1, I2C_TIMEOUT);
+        expander_status = i2c_read_register(I2C_ADDR, EXPANDER_ROW_REGISTER, &column_state, 1, I2C_TIMEOUT);
 
         column_state = ~column_state;
     } else {
@@ -460,7 +460,7 @@ static void select_col(uint8_t col)
             // set active col low  : 0
             // set other cols hi-Z : 1
             uint8_t port = 0xFF & ~(1<<col);
-            expander_status = i2c_writeReg(I2C_ADDR, EXPANDER_COL_REGISTER, &port, 1, I2C_TIMEOUT);
+            expander_status = i2c_write_register(I2C_ADDR, EXPANDER_COL_REGISTER, &port, 1, I2C_TIMEOUT);
         }
     } else {
         // select on teensy
diff --git a/keyboards/handwired/onekey/keymaps/i2c_scanner/keymap.c b/keyboards/handwired/onekey/keymaps/i2c_scanner/keymap.c
index ea8443709d..43e61c29d3 100644
--- a/keyboards/handwired/onekey/keymaps/i2c_scanner/keymap.c
+++ b/keyboards/handwired/onekey/keymaps/i2c_scanner/keymap.c
@@ -14,7 +14,7 @@ i2c_status_t i2c_start_bodge(uint8_t address, uint16_t timeout) {
 
     // except on ChibiOS where the only way is do do "something"
     uint8_t data = 0;
-    return i2c_readReg(address, 0, &data, sizeof(data), TIMEOUT);
+    return i2c_read_register(address, 0, &data, sizeof(data), TIMEOUT);
 }
 
 #    define i2c_start i2c_start_bodge
diff --git a/keyboards/kagizaraya/chidori/board.c b/keyboards/kagizaraya/chidori/board.c
index e00156eb90..117a4c0127 100644
--- a/keyboards/kagizaraya/chidori/board.c
+++ b/keyboards/kagizaraya/chidori/board.c
@@ -69,8 +69,8 @@ static void board_set_slave_led(board_info_t* board, uint8_t led_index, bool sta
     board->led_status[led_index] = status;
     uint8_t iodir                = board_merge_led_config(board, 0xff);
     uint8_t data                 = board_merge_led_status(board, 0x00);
-    i2c_writeReg(EXPANDER_ADDR(board->i2c_address), EXPANDER_IODIRB, (const uint8_t*)&iodir, sizeof(iodir), BOARD_I2C_TIMEOUT);
-    i2c_writeReg(EXPANDER_ADDR(board->i2c_address), EXPANDER_OLATB, (const uint8_t*)&data, sizeof(data), BOARD_I2C_TIMEOUT);
+    i2c_write_register(EXPANDER_ADDR(board->i2c_address), EXPANDER_IODIRB, (const uint8_t*)&iodir, sizeof(iodir), BOARD_I2C_TIMEOUT);
+    i2c_write_register(EXPANDER_ADDR(board->i2c_address), EXPANDER_OLATB, (const uint8_t*)&data, sizeof(data), BOARD_I2C_TIMEOUT);
 }
 
 static uint8_t board_merge_led_config(board_info_t* board, uint8_t iodir) {
@@ -86,30 +86,30 @@ static bool board_slave_config(board_info_t* board) {
     i2c_status_t res   = 0;
 
     // Set to input
-    res = i2c_writeReg(EXPANDER_ADDR(board->i2c_address), EXPANDER_IODIRA, (const uint8_t*)&set, sizeof(set), BOARD_I2C_TIMEOUT);
+    res = i2c_write_register(EXPANDER_ADDR(board->i2c_address), EXPANDER_IODIRA, (const uint8_t*)&set, sizeof(set), BOARD_I2C_TIMEOUT);
     if (res < 0) return false;
     // RESTRICTION: LEDs only on PORT B.
     set = board_merge_led_config(board, set);
-    res = i2c_writeReg(EXPANDER_ADDR(board->i2c_address), EXPANDER_IODIRB, (const uint8_t*)&set, sizeof(set), BOARD_I2C_TIMEOUT);
+    res = i2c_write_register(EXPANDER_ADDR(board->i2c_address), EXPANDER_IODIRB, (const uint8_t*)&set, sizeof(set), BOARD_I2C_TIMEOUT);
     if (res < 0) return false;
     set = 0xff;
 
     // Pull up for input - enable
-    res = i2c_writeReg(EXPANDER_ADDR(board->i2c_address), EXPANDER_GPPUA, (const uint8_t*)&set, sizeof(set), BOARD_I2C_TIMEOUT);
+    res = i2c_write_register(EXPANDER_ADDR(board->i2c_address), EXPANDER_GPPUA, (const uint8_t*)&set, sizeof(set), BOARD_I2C_TIMEOUT);
     if (res < 0) return false;
-    res = i2c_writeReg(EXPANDER_ADDR(board->i2c_address), EXPANDER_GPPUB, (const uint8_t*)&set, sizeof(set), BOARD_I2C_TIMEOUT);
+    res = i2c_write_register(EXPANDER_ADDR(board->i2c_address), EXPANDER_GPPUB, (const uint8_t*)&set, sizeof(set), BOARD_I2C_TIMEOUT);
     if (res < 0) return false;
 
     // Disable interrupt
-    res = i2c_writeReg(EXPANDER_ADDR(board->i2c_address), EXPANDER_GPINTENA, (const uint8_t*)&clear, sizeof(clear), BOARD_I2C_TIMEOUT);
+    res = i2c_write_register(EXPANDER_ADDR(board->i2c_address), EXPANDER_GPINTENA, (const uint8_t*)&clear, sizeof(clear), BOARD_I2C_TIMEOUT);
     if (res < 0) return false;
-    res = i2c_writeReg(EXPANDER_ADDR(board->i2c_address), EXPANDER_GPINTENB, (const uint8_t*)&clear, sizeof(clear), BOARD_I2C_TIMEOUT);
+    res = i2c_write_register(EXPANDER_ADDR(board->i2c_address), EXPANDER_GPINTENB, (const uint8_t*)&clear, sizeof(clear), BOARD_I2C_TIMEOUT);
     if (res < 0) return false;
 
     // Polarity - same logic
-    res = i2c_writeReg(EXPANDER_ADDR(board->i2c_address), EXPANDER_IPOLA, (const uint8_t*)&clear, sizeof(clear), BOARD_I2C_TIMEOUT);
+    res = i2c_write_register(EXPANDER_ADDR(board->i2c_address), EXPANDER_IPOLA, (const uint8_t*)&clear, sizeof(clear), BOARD_I2C_TIMEOUT);
     if (res < 0) return false;
-    res = i2c_writeReg(EXPANDER_ADDR(board->i2c_address), EXPANDER_IPOLB, (const uint8_t*)&clear, sizeof(clear), BOARD_I2C_TIMEOUT);
+    res = i2c_write_register(EXPANDER_ADDR(board->i2c_address), EXPANDER_IPOLB, (const uint8_t*)&clear, sizeof(clear), BOARD_I2C_TIMEOUT);
     if (res < 0) return false;
 
     return true;
@@ -203,7 +203,7 @@ static uint8_t board_read_slave_cols(board_info_t* board) {
         return 0xff;
     }
     uint8_t      data = 0xff;
-    i2c_status_t res  = i2c_readReg(EXPANDER_ADDR(board->i2c_address), EXPANDER_GPIOA, &data, sizeof(data), BOARD_I2C_TIMEOUT);
+    i2c_status_t res  = i2c_read_register(EXPANDER_ADDR(board->i2c_address), EXPANDER_GPIOA, &data, sizeof(data), BOARD_I2C_TIMEOUT);
     return (res < 0) ? 0xff : data;
 }
 
@@ -214,8 +214,8 @@ static void board_select_slave_row(board_info_t* board, uint8_t board_row) {
     uint8_t pin    = board->row_pins[board_row];
     uint8_t iodir  = board_merge_led_config(board, PIN2MASK(pin));
     uint8_t status = board_merge_led_status(board, PIN2MASK(pin));
-    i2c_writeReg(EXPANDER_ADDR(board->i2c_address), EXPANDER_IODIRB, (const uint8_t*)&iodir, sizeof(iodir), BOARD_I2C_TIMEOUT);
-    i2c_writeReg(EXPANDER_ADDR(board->i2c_address), EXPANDER_OLATB, (const uint8_t*)&status, sizeof(status), BOARD_I2C_TIMEOUT);
+    i2c_write_register(EXPANDER_ADDR(board->i2c_address), EXPANDER_IODIRB, (const uint8_t*)&iodir, sizeof(iodir), BOARD_I2C_TIMEOUT);
+    i2c_write_register(EXPANDER_ADDR(board->i2c_address), EXPANDER_OLATB, (const uint8_t*)&status, sizeof(status), BOARD_I2C_TIMEOUT);
 }
 
 static void board_unselect_slave_rows(board_info_t* board) {
@@ -224,8 +224,8 @@ static void board_unselect_slave_rows(board_info_t* board) {
     }
     uint8_t iodir = board_merge_led_config(board, 0xff);
     uint8_t data  = board_merge_led_status(board, 0x00);
-    i2c_writeReg(EXPANDER_ADDR(board->i2c_address), EXPANDER_IODIRB, (const uint8_t*)&iodir, sizeof(iodir), BOARD_I2C_TIMEOUT);
-    i2c_writeReg(EXPANDER_ADDR(board->i2c_address), EXPANDER_OLATB, (const uint8_t*)&data, sizeof(data), BOARD_I2C_TIMEOUT);
+    i2c_write_register(EXPANDER_ADDR(board->i2c_address), EXPANDER_IODIRB, (const uint8_t*)&iodir, sizeof(iodir), BOARD_I2C_TIMEOUT);
+    i2c_write_register(EXPANDER_ADDR(board->i2c_address), EXPANDER_OLATB, (const uint8_t*)&data, sizeof(data), BOARD_I2C_TIMEOUT);
 }
 
 static void board_unselect_slave_row(board_info_t* board, uint8_t board_row) { board_unselect_slave_rows(board); }
diff --git a/keyboards/matrix/abelx/aw9523b.c b/keyboards/matrix/abelx/aw9523b.c
index 8c6e8eaccf..860a71740d 100644
--- a/keyboards/matrix/abelx/aw9523b.c
+++ b/keyboards/matrix/abelx/aw9523b.c
@@ -51,15 +51,15 @@ void aw9523b_init(uint8_t addr)
     i2c_init();
     // reset chip
     uint8_t data = 0;
-    i2c_writeReg(addr, AW9523B_RESET, &data, 1, TIMEOUT);
+    i2c_write_register(addr, AW9523B_RESET, &data, 1, TIMEOUT);
     wait_ms(1);
     // set max led current
     data = 0x03; // 37mA/4
-    i2c_writeReg(addr, AW9523B_CTL, &data, 1, TIMEOUT);
+    i2c_write_register(addr, AW9523B_CTL, &data, 1, TIMEOUT);
     // set port to led mode
     data = 0;
-    i2c_writeReg(addr, AW9523B_P0_LED, &data, 1, TIMEOUT);
-    i2c_writeReg(addr, AW9523B_P1_LED, &data, 1, TIMEOUT);
+    i2c_write_register(addr, AW9523B_P0_LED, &data, 1, TIMEOUT);
+    i2c_write_register(addr, AW9523B_P1_LED, &data, 1, TIMEOUT);
     // clear pwm buff
     for (uint8_t i = 0; i < 16; i++) {
         aw9523b_pwm_buf[i] = 0;
@@ -91,9 +91,9 @@ void aw9523b_update_pwm_buffers(uint8_t addr)
     if (aw9523b_pwm_dirty) {
         for (uint8_t i = 0; i < AW9523B_RGB_NUM; i++){
             aw9523b_led led = g_aw9523b_leds[i];
-            i2c_writeReg(addr, led.r, &aw9523b_pwm_buf[PWM2BUF(led.r)], 1, TIMEOUT);
-            i2c_writeReg(addr, led.g, &aw9523b_pwm_buf[PWM2BUF(led.g)], 1, TIMEOUT);
-            i2c_writeReg(addr, led.b, &aw9523b_pwm_buf[PWM2BUF(led.b)], 1, TIMEOUT);
+            i2c_write_register(addr, led.r, &aw9523b_pwm_buf[PWM2BUF(led.r)], 1, TIMEOUT);
+            i2c_write_register(addr, led.g, &aw9523b_pwm_buf[PWM2BUF(led.g)], 1, TIMEOUT);
+            i2c_write_register(addr, led.b, &aw9523b_pwm_buf[PWM2BUF(led.b)], 1, TIMEOUT);
         }
         aw9523b_pwm_dirty = false;
     }
diff --git a/keyboards/matrix/abelx/tca6424.c b/keyboards/matrix/abelx/tca6424.c
index 44dc7909d8..c632157256 100644
--- a/keyboards/matrix/abelx/tca6424.c
+++ b/keyboards/matrix/abelx/tca6424.c
@@ -47,13 +47,13 @@ void tca6424_init(void)
 
 static void write_port(uint8_t p, uint8_t d)
 {
-    i2c_writeReg(TCA6424_ADDR, p, &d, 1, TIMEOUT);
+    i2c_write_register(TCA6424_ADDR, p, &d, 1, TIMEOUT);
 }
 
 static uint8_t read_port(uint8_t port)
 {
     uint8_t data = 0;
-    i2c_readReg(TCA6424_ADDR, port, &data, 1, TIMEOUT);
+    i2c_read_register(TCA6424_ADDR, port, &data, 1, TIMEOUT);
     return data;
 }
 
diff --git a/keyboards/matrix/m20add/tca6424.c b/keyboards/matrix/m20add/tca6424.c
index 38cea9f15f..c6ffa4c2fe 100644
--- a/keyboards/matrix/m20add/tca6424.c
+++ b/keyboards/matrix/m20add/tca6424.c
@@ -45,13 +45,13 @@ void tca6424_init(void)
 
 static void write_port(uint8_t p, uint8_t d)
 {
-    i2c_writeReg(TCA6424_ADDR, p, &d, 1, TIMEOUT);
+    i2c_write_register(TCA6424_ADDR, p, &d, 1, TIMEOUT);
 }
 
 static uint8_t read_port(uint8_t port)
 {
     uint8_t data = 0;
-    i2c_readReg(TCA6424_ADDR, port, &data, 1, TIMEOUT);
+    i2c_read_register(TCA6424_ADDR, port, &data, 1, TIMEOUT);
     return data;
 }
 
diff --git a/keyboards/rate/pistachio_pro/lib/bme280.c b/keyboards/rate/pistachio_pro/lib/bme280.c
index f3dc231dc5..ac7a4873ba 100644
--- a/keyboards/rate/pistachio_pro/lib/bme280.c
+++ b/keyboards/rate/pistachio_pro/lib/bme280.c
@@ -102,9 +102,9 @@ static int32_t t_fine;
 static void readTrim(void) {
     uint8_t data[32];
 
-    i2c_readReg(BME280_ADDRESS, BME280_REG_CALIB00, &data[0], 24, I2C_BME280_TIMEOUT);
-    i2c_readReg(BME280_ADDRESS, BME280_REG_CALIB25, &data[25], 1, I2C_BME280_TIMEOUT);
-    i2c_readReg(BME280_ADDRESS, BME280_REG_CALIB26, &data[25], 7, I2C_BME280_TIMEOUT);
+    i2c_read_register(BME280_ADDRESS, BME280_REG_CALIB00, &data[0], 24, I2C_BME280_TIMEOUT);
+    i2c_read_register(BME280_ADDRESS, BME280_REG_CALIB25, &data[25], 1, I2C_BME280_TIMEOUT);
+    i2c_read_register(BME280_ADDRESS, BME280_REG_CALIB26, &data[25], 7, I2C_BME280_TIMEOUT);
 
     dig_T1 = (data[1] << 8) | data[0];
     dig_T2 = (data[3] << 8) | data[2];
@@ -131,7 +131,7 @@ static void readTrim(void) {
 static void readData(void) {
     uint8_t data[8];
 
-    i2c_readReg(BME280_ADDRESS, 0xF7, &data[0], 8, I2C_BME280_TIMEOUT);
+    i2c_read_register(BME280_ADDRESS, 0xF7, &data[0], 8, I2C_BME280_TIMEOUT);
 
     pres_raw = data[0];
     pres_raw = (pres_raw<<8) | data[1];
@@ -210,9 +210,9 @@ void bme280_init(void) {
     config_reg = BME280_CONFIG_VAL;
 
     i2c_init();
-    i2c_writeReg(BME280_ADDRESS, BME280_REG_CTRL_HUM, &ctrl_hum_reg, 1, I2C_BME280_TIMEOUT);
-    i2c_writeReg(BME280_ADDRESS, BME280_REG_CTRL_MEAS, &ctrl_meas_reg, 1, I2C_BME280_TIMEOUT);
-    i2c_writeReg(BME280_ADDRESS, BME280_REG_CONFIG, &config_reg, 1, I2C_BME280_TIMEOUT);
+    i2c_write_register(BME280_ADDRESS, BME280_REG_CTRL_HUM, &ctrl_hum_reg, 1, I2C_BME280_TIMEOUT);
+    i2c_write_register(BME280_ADDRESS, BME280_REG_CTRL_MEAS, &ctrl_meas_reg, 1, I2C_BME280_TIMEOUT);
+    i2c_write_register(BME280_ADDRESS, BME280_REG_CONFIG, &config_reg, 1, I2C_BME280_TIMEOUT);
     readTrim();
 
     return;
diff --git a/keyboards/rgbkb/common/touch_encoder.c b/keyboards/rgbkb/common/touch_encoder.c
index 5f0e4f0cca..18037b8fb5 100644
--- a/keyboards/rgbkb/common/touch_encoder.c
+++ b/keyboards/rgbkb/common/touch_encoder.c
@@ -125,7 +125,7 @@ bool touch_slave_init = false;
 slave_touch_status_t touch_slave_state = { 0, 0 };
 
 static bool write_register8(uint8_t address, uint8_t data) {
-    i2c_status_t status = i2c_writeReg((I2C_ADDRESS << 1), address, &data, sizeof(data), I2C_TIMEOUT);
+    i2c_status_t status = i2c_write_register((I2C_ADDRESS << 1), address, &data, sizeof(data), I2C_TIMEOUT);
     if (status != I2C_STATUS_SUCCESS) {
         xprintf("write_register8 %d failed %d\n", address, status);
     }
@@ -133,7 +133,7 @@ static bool write_register8(uint8_t address, uint8_t data) {
 }
 
 static bool read_register(uint8_t address, uint8_t* data, uint16_t length) {
-    i2c_status_t status = i2c_readReg((I2C_ADDRESS << 1), address, data, length, I2C_TIMEOUT);
+    i2c_status_t status = i2c_read_register((I2C_ADDRESS << 1), address, data, length, I2C_TIMEOUT);
     if (status != I2C_STATUS_SUCCESS) {
         xprintf("read_register %d failed %d\n", address, status);
         return false;
diff --git a/keyboards/sx60/matrix.c b/keyboards/sx60/matrix.c
index 66bc494be6..22f37db539 100644
--- a/keyboards/sx60/matrix.c
+++ b/keyboards/sx60/matrix.c
@@ -214,7 +214,7 @@ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
         return 0;
     } else {
         uint8_t data = 0;
-        mcp23018_status = i2c_readReg(I2C_ADDR, GPIOA, &data, 1, I2C_TIMEOUT);
+        mcp23018_status = i2c_read_register(I2C_ADDR, GPIOA, &data, 1, I2C_TIMEOUT);
         if (!mcp23018_status) {
             current_matrix[current_row] |= (~((uint16_t)data) << 8);
         }
@@ -245,7 +245,7 @@ static void select_row(uint8_t row)
            set active row output : 1
            set other rows hi-Z : 1 */
         uint8_t port = 0xFF & ~(1<<abs(row-4));
-        mcp23018_status = i2c_writeReg(I2C_ADDR, GPIOB, &port, 1, I2C_TIMEOUT);
+        mcp23018_status = i2c_write_register(I2C_ADDR, GPIOB, &port, 1, I2C_TIMEOUT);
     }
 
     uint8_t pin = row_pins[row];
diff --git a/keyboards/sx60/sx60.c b/keyboards/sx60/sx60.c
index cb7f2b88ff..12fa6a9ed5 100755
--- a/keyboards/sx60/sx60.c
+++ b/keyboards/sx60/sx60.c
@@ -27,9 +27,9 @@ uint8_t init_mcp23018(void) {
         0b00000000,
     };
 
-    mcp23018_status = i2c_writeReg(I2C_ADDR, IODIRA, direction, 2, I2C_TIMEOUT);
+    mcp23018_status = i2c_write_register(I2C_ADDR, IODIRA, direction, 2, I2C_TIMEOUT);
     if (mcp23018_status) return mcp23018_status;
 
-    mcp23018_status = i2c_writeReg(I2C_ADDR, GPPUA, pullup, 2, I2C_TIMEOUT);
+    mcp23018_status = i2c_write_register(I2C_ADDR, GPPUA, pullup, 2, I2C_TIMEOUT);
     return mcp23018_status;
 }
diff --git a/keyboards/system76/launch_1/usb_mux.c b/keyboards/system76/launch_1/usb_mux.c
index 6cb04dcdd7..1c6dd2376e 100644
--- a/keyboards/system76/launch_1/usb_mux.c
+++ b/keyboards/system76/launch_1/usb_mux.c
@@ -354,7 +354,7 @@ i2c_status_t ptn5110_init(struct PTN5110* self) {
 
 // Read PTN5110 CC_STATUS.
 // Returns zero on success or a negative number on error.
-i2c_status_t ptn5110_get_cc_status(struct PTN5110* self, uint8_t* cc) { return i2c_readReg(self->addr << 1, 0x1D, cc, 1, I2C_TIMEOUT); }
+i2c_status_t ptn5110_get_cc_status(struct PTN5110* self, uint8_t* cc) { return i2c_read_register(self->addr << 1, 0x1D, cc, 1, I2C_TIMEOUT); }
 
 // Set PTN5110 SSMUX orientation.
 // Returns zero on success or a negative number on error.
@@ -362,7 +362,7 @@ i2c_status_t ptn5110_set_ssmux(struct PTN5110* self, bool orientation) { return
 
 // Write PTN5110 COMMAND.
 // Returns zero on success or negative number on error.
-i2c_status_t ptn5110_command(struct PTN5110* self, uint8_t command) { return i2c_writeReg(self->addr << 1, 0x23, &command, 1, I2C_TIMEOUT); }
+i2c_status_t ptn5110_command(struct PTN5110* self, uint8_t command) { return i2c_write_register(self->addr << 1, 0x23, &command, 1, I2C_TIMEOUT); }
 
 // Set orientation of PTN5110 operating as a sink, call this once.
 // Returns zero on success or a negative number on error.
diff --git a/keyboards/torn/mcp23018.c b/keyboards/torn/mcp23018.c
index 12c4f9bc7f..ba26e67ba9 100644
--- a/keyboards/torn/mcp23018.c
+++ b/keyboards/torn/mcp23018.c
@@ -48,7 +48,7 @@ i2c_status_t mcp23018_writeReg(uint8_t regaddr, const uint8_t* data, uint16_t le
         return mcp23018_status;
     }
 
-    mcp23018_status = i2c_writeReg((MCP23018_ADDR << 1), regaddr, data, length, MCP23018_TIMEOUT);
+    mcp23018_status = i2c_write_register((MCP23018_ADDR << 1), regaddr, data, length, MCP23018_TIMEOUT);
     return mcp23018_status;
 }
 
@@ -57,6 +57,6 @@ i2c_status_t mcp23018_readReg(uint8_t regaddr, uint8_t* data, uint16_t length) {
         return mcp23018_status;
     }
 
-    mcp23018_status = i2c_readReg((MCP23018_ADDR << 1), regaddr, data, length, MCP23018_TIMEOUT);
+    mcp23018_status = i2c_read_register((MCP23018_ADDR << 1), regaddr, data, length, MCP23018_TIMEOUT);
     return mcp23018_status;
 }
diff --git a/keyboards/touchpad/matrix.c b/keyboards/touchpad/matrix.c
index 6bffb826bd..87944cb7cc 100644
--- a/keyboards/touchpad/matrix.c
+++ b/keyboards/touchpad/matrix.c
@@ -38,7 +38,7 @@ volatile uint8_t LEDs[6][6] = {{0}};//Stores current LED values
 //Read data from the cap touch IC
 uint8_t readDataFromTS(uint8_t reg) {
   uint8_t rx[1] = { 0 };
-  if (i2c_readReg(0x1C << 1, reg, rx, 1, 100) == 0) {
+  if (i2c_read_register(0x1C << 1, reg, rx, 1, 100) == 0) {
     return rx[0];
   }
   return 0;
diff --git a/keyboards/yiancardesigns/barleycorn/matrix.c b/keyboards/yiancardesigns/barleycorn/matrix.c
index 99366d6098..9ef2926566 100644
--- a/keyboards/yiancardesigns/barleycorn/matrix.c
+++ b/keyboards/yiancardesigns/barleycorn/matrix.c
@@ -42,9 +42,9 @@ static void init_pins(void) {
     unselect_rows();
     // Set I/O
     uint8_t send_data[2] = { 0xFF, 0x03};
-    i2c_writeReg((PORT_EXPANDER_ADDRESS << 1), 0x00, &send_data[0], 2, 20);
+    i2c_write_register((PORT_EXPANDER_ADDRESS << 1), 0x00, &send_data[0], 2, 20);
     // Set Pull-up
-    i2c_writeReg((PORT_EXPANDER_ADDRESS << 1), 0x0C, &send_data[0], 2, 20);
+    i2c_write_register((PORT_EXPANDER_ADDRESS << 1), 0x0C, &send_data[0], 2, 20);
 
     for (uint8_t x = 0; x < MATRIX_COLS; x++) {
         if ( x < 8 ) {
@@ -75,7 +75,7 @@ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
     matrix_io_delay();
 
     uint8_t port_expander_col_buffer[2];
-    i2c_readReg((PORT_EXPANDER_ADDRESS << 1), 0x12, &port_expander_col_buffer[0], 2, 20);
+    i2c_read_register((PORT_EXPANDER_ADDRESS << 1), 0x12, &port_expander_col_buffer[0], 2, 20);
 
     // For each col...
     for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
diff --git a/keyboards/yiancardesigns/gingham/gingham.c b/keyboards/yiancardesigns/gingham/gingham.c
index 496ae35705..f34d4d7cfd 100644
--- a/keyboards/yiancardesigns/gingham/gingham.c
+++ b/keyboards/yiancardesigns/gingham/gingham.c
@@ -22,7 +22,7 @@ void matrix_init_kb(void) {
     // Due to the way the port expander is setup both LEDs are already outputs. This is set n matrix.copy
     //Turn the red LED on as power indicator.
     send_data = 0x10;
-    i2c_writeReg((PORT_EXPANDER_ADDRESS << 1), 0x09, &send_data, 1, 20);
+    i2c_write_register((PORT_EXPANDER_ADDRESS << 1), 0x09, &send_data, 1, 20);
 
     matrix_init_user();
 }
@@ -31,7 +31,7 @@ bool led_update_kb(led_t led_state) {
     bool res = led_update_user(led_state);
     if(res) {
         send_data = led_state.caps_lock ? 0x18 : 0x10;
-        i2c_writeReg((PORT_EXPANDER_ADDRESS << 1), 0x09, &send_data, 1, 20);
+        i2c_write_register((PORT_EXPANDER_ADDRESS << 1), 0x09, &send_data, 1, 20);
     }
     return res;
 }
diff --git a/keyboards/yiancardesigns/gingham/matrix.c b/keyboards/yiancardesigns/gingham/matrix.c
index 47c8830565..d17518b494 100644
--- a/keyboards/yiancardesigns/gingham/matrix.c
+++ b/keyboards/yiancardesigns/gingham/matrix.c
@@ -42,9 +42,9 @@ static void init_pins(void) {
     unselect_rows();
     // Set I/O
     uint8_t send_data = 0x07;
-    i2c_writeReg((PORT_EXPANDER_ADDRESS << 1), 0x00, &send_data, 1, 20);
+    i2c_write_register((PORT_EXPANDER_ADDRESS << 1), 0x00, &send_data, 1, 20);
     // Set Pull-up
-    i2c_writeReg((PORT_EXPANDER_ADDRESS << 1), 0x06, &send_data, 1, 20);
+    i2c_write_register((PORT_EXPANDER_ADDRESS << 1), 0x06, &send_data, 1, 20);
 
     for (uint8_t x = 0; x < MATRIX_COLS; x++) {
         if ( (x > 0) && (x < 12) ) {
@@ -80,15 +80,15 @@ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
         // Select the col pin to read (active low)
         switch (col_index) {
             case 0 :
-                i2c_readReg((PORT_EXPANDER_ADDRESS << 1), 0x09, &pin_state, 1, 20);
+                i2c_read_register((PORT_EXPANDER_ADDRESS << 1), 0x09, &pin_state, 1, 20);
                 pin_state = pin_state & 0x01;
                 break;
             case 12 :
-                i2c_readReg((PORT_EXPANDER_ADDRESS << 1), 0x09, &pin_state, 1, 20);
+                i2c_read_register((PORT_EXPANDER_ADDRESS << 1), 0x09, &pin_state, 1, 20);
                 pin_state = pin_state & (1 << 2);
                 break;
             case 13 :
-                i2c_readReg((PORT_EXPANDER_ADDRESS << 1), 0x09, &pin_state, 1, 20);
+                i2c_read_register((PORT_EXPANDER_ADDRESS << 1), 0x09, &pin_state, 1, 20);
                 pin_state = pin_state & (1 << 1);
                 break;
             default :
diff --git a/keyboards/yiancardesigns/seigaiha/matrix.c b/keyboards/yiancardesigns/seigaiha/matrix.c
index 212b8015f0..55ee239db4 100644
--- a/keyboards/yiancardesigns/seigaiha/matrix.c
+++ b/keyboards/yiancardesigns/seigaiha/matrix.c
@@ -42,9 +42,9 @@ static void init_pins(void) {
     unselect_rows();
     // Set I/O
     uint8_t send_data = 0x1F;
-    i2c_writeReg((PORT_EXPANDER_ADDRESS << 1), 0x00, &send_data, 1, 20);
+    i2c_write_register((PORT_EXPANDER_ADDRESS << 1), 0x00, &send_data, 1, 20);
     // Set Pull-up
-    i2c_writeReg((PORT_EXPANDER_ADDRESS << 1), 0x06, &send_data, 1, 20);
+    i2c_write_register((PORT_EXPANDER_ADDRESS << 1), 0x06, &send_data, 1, 20);
 
     for (uint8_t x = 0; x < MATRIX_COLS; x++) {
         if ( x < 10 ) {
@@ -75,7 +75,7 @@ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
     matrix_io_delay();
 
     uint8_t port_expander_col_buffer;
-    i2c_readReg((PORT_EXPANDER_ADDRESS << 1), 0x09, &port_expander_col_buffer, 1, 20);
+    i2c_read_register((PORT_EXPANDER_ADDRESS << 1), 0x09, &port_expander_col_buffer, 1, 20);
 
     // For each col...
     for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
diff --git a/keyboards/yiancardesigns/seigaiha/seigaiha.c b/keyboards/yiancardesigns/seigaiha/seigaiha.c
index 7a39637b91..03d420f053 100644
--- a/keyboards/yiancardesigns/seigaiha/seigaiha.c
+++ b/keyboards/yiancardesigns/seigaiha/seigaiha.c
@@ -26,7 +26,7 @@ void led_update_ports(led_t led_state) {
     } else {
         send_data &= ~(1 << 5);
     }
-    i2c_writeReg((PORT_EXPANDER_ADDRESS << 1), 0x0A, &send_data, 1, 20);
+    i2c_write_register((PORT_EXPANDER_ADDRESS << 1), 0x0A, &send_data, 1, 20);
 }
 
 __attribute__((weak)) layer_state_t layer_state_set_user(layer_state_t state) {
diff --git a/keyboards/zsa/moonlander/matrix.c b/keyboards/zsa/moonlander/matrix.c
index 36017fcd12..aa97d0721f 100644
--- a/keyboards/zsa/moonlander/matrix.c
+++ b/keyboards/zsa/moonlander/matrix.c
@@ -144,7 +144,7 @@ bool matrix_scan_custom(matrix_row_t current_matrix[]) {
             // read col
 
             mcp23018_tx[0] = 0x13;  // GPIOB
-            if (MSG_OK != i2c_readReg(MCP23018_DEFAULT_ADDRESS << 1, mcp23018_tx[0], &mcp23018_rx[0], 1, MOONLANDER_I2C_TIMEOUT)) {
+            if (MSG_OK != i2c_read_register(MCP23018_DEFAULT_ADDRESS << 1, mcp23018_tx[0], &mcp23018_rx[0], 1, MOONLANDER_I2C_TIMEOUT)) {
                 dprintf("error vert\n");
                 mcp23018_initd = false;
             }
diff --git a/platforms/avr/drivers/i2c_master.c b/platforms/avr/drivers/i2c_master.c
index 58939f3e00..0183103707 100644
--- a/platforms/avr/drivers/i2c_master.c
+++ b/platforms/avr/drivers/i2c_master.c
@@ -189,7 +189,7 @@ i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16
     return (status < 0) ? status : I2C_STATUS_SUCCESS;
 }
 
-i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout) {
+i2c_status_t i2c_write_register(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout) {
     i2c_status_t status = i2c_start(devaddr | 0x00, timeout);
     if (status >= 0) {
         status = i2c_write(regaddr, timeout);
@@ -204,7 +204,7 @@ i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const uint8_t* data,
     return status;
 }
 
-i2c_status_t i2c_writeReg16(uint8_t devaddr, uint16_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout) {
+i2c_status_t i2c_write_register16(uint8_t devaddr, uint16_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout) {
     i2c_status_t status = i2c_start(devaddr | 0x00, timeout);
     if (status >= 0) {
         status = i2c_write(regaddr >> 8, timeout);
@@ -223,7 +223,7 @@ i2c_status_t i2c_writeReg16(uint8_t devaddr, uint16_t regaddr, const uint8_t* da
     return status;
 }
 
-i2c_status_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout) {
+i2c_status_t i2c_read_register(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout) {
     i2c_status_t status = i2c_start(devaddr, timeout);
     if (status < 0) {
         goto error;
@@ -256,7 +256,7 @@ error:
     return (status < 0) ? status : I2C_STATUS_SUCCESS;
 }
 
-i2c_status_t i2c_readReg16(uint8_t devaddr, uint16_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout) {
+i2c_status_t i2c_read_register16(uint8_t devaddr, uint16_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout) {
     i2c_status_t status = i2c_start(devaddr, timeout);
     if (status < 0) {
         goto error;
diff --git a/platforms/avr/drivers/i2c_master.h b/platforms/avr/drivers/i2c_master.h
index 04ef126c80..18587c4a57 100644
--- a/platforms/avr/drivers/i2c_master.h
+++ b/platforms/avr/drivers/i2c_master.h
@@ -21,6 +21,13 @@
 
 #include <stdint.h>
 
+// ### DEPRECATED - DO NOT USE ###
+#define i2c_writeReg(devaddr, regaddr, data, length, timeout) i2c_write_register(devaddr, regaddr, data, length, timeout)
+#define i2c_writeReg16(devaddr, regaddr, data, length, timeout) i2c_write_register16(devaddr, regaddr, data, length, timeout)
+#define i2c_readReg(devaddr, regaddr, data, length, timeout) i2c_read_register(devaddr, regaddr, data, length, timeout)
+#define i2c_readReg16(devaddr, regaddr, data, length, timeout) i2c_read_register16(devaddr, regaddr, data, length, timeout)
+// ###############################
+
 #define I2C_READ 0x01
 #define I2C_WRITE 0x00
 
@@ -40,8 +47,8 @@ int16_t      i2c_read_ack(uint16_t timeout);
 int16_t      i2c_read_nack(uint16_t timeout);
 i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length, uint16_t timeout);
 i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout);
-i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout);
-i2c_status_t i2c_writeReg16(uint8_t devaddr, uint16_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout);
-i2c_status_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout);
-i2c_status_t i2c_readReg16(uint8_t devaddr, uint16_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout);
+i2c_status_t i2c_write_register(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout);
+i2c_status_t i2c_write_register16(uint8_t devaddr, uint16_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout);
+i2c_status_t i2c_read_register(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout);
+i2c_status_t i2c_read_register16(uint8_t devaddr, uint16_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout);
 void         i2c_stop(void);
diff --git a/platforms/chibios/drivers/i2c_master.c b/platforms/chibios/drivers/i2c_master.c
index 7c49f9d005..5ee2738e6d 100644
--- a/platforms/chibios/drivers/i2c_master.c
+++ b/platforms/chibios/drivers/i2c_master.c
@@ -170,7 +170,7 @@ i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16
     return i2c_epilogue(status);
 }
 
-i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout) {
+i2c_status_t i2c_write_register(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout) {
     i2c_address = devaddr;
     i2cStart(&I2C_DRIVER, &i2cconfig);
 
@@ -184,7 +184,7 @@ i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const uint8_t* data,
     return i2c_epilogue(status);
 }
 
-i2c_status_t i2c_writeReg16(uint8_t devaddr, uint16_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout) {
+i2c_status_t i2c_write_register16(uint8_t devaddr, uint16_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout) {
     i2c_address = devaddr;
     i2cStart(&I2C_DRIVER, &i2cconfig);
 
@@ -199,14 +199,14 @@ i2c_status_t i2c_writeReg16(uint8_t devaddr, uint16_t regaddr, const uint8_t* da
     return i2c_epilogue(status);
 }
 
-i2c_status_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout) {
+i2c_status_t i2c_read_register(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout) {
     i2c_address = devaddr;
     i2cStart(&I2C_DRIVER, &i2cconfig);
     msg_t status = i2cMasterTransmitTimeout(&I2C_DRIVER, (i2c_address >> 1), &regaddr, 1, data, length, TIME_MS2I(timeout));
     return i2c_epilogue(status);
 }
 
-i2c_status_t i2c_readReg16(uint8_t devaddr, uint16_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout) {
+i2c_status_t i2c_read_register16(uint8_t devaddr, uint16_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout) {
     i2c_address = devaddr;
     i2cStart(&I2C_DRIVER, &i2cconfig);
     uint8_t register_packet[2] = {regaddr >> 8, regaddr & 0xFF};
diff --git a/platforms/chibios/drivers/i2c_master.h b/platforms/chibios/drivers/i2c_master.h
index deee7ecc08..5f16367831 100644
--- a/platforms/chibios/drivers/i2c_master.h
+++ b/platforms/chibios/drivers/i2c_master.h
@@ -26,6 +26,13 @@
 
 #include <stdint.h>
 
+// ### DEPRECATED - DO NOT USE ###
+#define i2c_writeReg(devaddr, regaddr, data, length, timeout) i2c_write_register(devaddr, regaddr, data, length, timeout)
+#define i2c_writeReg16(devaddr, regaddr, data, length, timeout) i2c_write_register16(devaddr, regaddr, data, length, timeout)
+#define i2c_readReg(devaddr, regaddr, data, length, timeout) i2c_read_register(devaddr, regaddr, data, length, timeout)
+#define i2c_readReg16(devaddr, regaddr, data, length, timeout) i2c_read_register16(devaddr, regaddr, data, length, timeout)
+// ###############################
+
 typedef int16_t i2c_status_t;
 
 #define I2C_STATUS_SUCCESS (0)
@@ -36,8 +43,8 @@ void         i2c_init(void);
 i2c_status_t i2c_start(uint8_t address);
 i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length, uint16_t timeout);
 i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout);
-i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout);
-i2c_status_t i2c_writeReg16(uint8_t devaddr, uint16_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout);
-i2c_status_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout);
-i2c_status_t i2c_readReg16(uint8_t devaddr, uint16_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout);
+i2c_status_t i2c_write_register(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout);
+i2c_status_t i2c_write_register16(uint8_t devaddr, uint16_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout);
+i2c_status_t i2c_read_register(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout);
+i2c_status_t i2c_read_register16(uint8_t devaddr, uint16_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout);
 void         i2c_stop(void);
diff --git a/quantum/split_common/transport.c b/quantum/split_common/transport.c
index aade3c98d7..83edc34859 100644
--- a/quantum/split_common/transport.c
+++ b/quantum/split_common/transport.c
@@ -56,7 +56,7 @@ i2c_status_t transport_trigger_callback(int8_t id) {
     // Kick off the "callback executor", now that data has been written to the slave
     split_shmem->transaction_id     = id;
     split_transaction_desc_t *trans = &split_transaction_table[I2C_EXECUTE_CALLBACK];
-    return i2c_writeReg(SLAVE_I2C_ADDRESS, trans->initiator2target_offset, split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size, SLAVE_I2C_TIMEOUT);
+    return i2c_write_register(SLAVE_I2C_ADDRESS, trans->initiator2target_offset, split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size, SLAVE_I2C_TIMEOUT);
 }
 
 bool transport_execute_transaction(int8_t id, const void *initiator2target_buf, uint16_t initiator2target_length, void *target2initiator_buf, uint16_t target2initiator_length) {
@@ -65,7 +65,7 @@ bool transport_execute_transaction(int8_t id, const void *initiator2target_buf,
     if (initiator2target_length > 0) {
         size_t len = trans->initiator2target_buffer_size < initiator2target_length ? trans->initiator2target_buffer_size : initiator2target_length;
         memcpy(split_trans_initiator2target_buffer(trans), initiator2target_buf, len);
-        if ((status = i2c_writeReg(SLAVE_I2C_ADDRESS, trans->initiator2target_offset, split_trans_initiator2target_buffer(trans), len, SLAVE_I2C_TIMEOUT)) < 0) {
+        if ((status = i2c_write_register(SLAVE_I2C_ADDRESS, trans->initiator2target_offset, split_trans_initiator2target_buffer(trans), len, SLAVE_I2C_TIMEOUT)) < 0) {
             return false;
         }
     }
@@ -77,7 +77,7 @@ bool transport_execute_transaction(int8_t id, const void *initiator2target_buf,
 
     if (target2initiator_length > 0) {
         size_t len = trans->target2initiator_buffer_size < target2initiator_length ? trans->target2initiator_buffer_size : target2initiator_length;
-        if ((status = i2c_readReg(SLAVE_I2C_ADDRESS, trans->target2initiator_offset, split_trans_target2initiator_buffer(trans), len, SLAVE_I2C_TIMEOUT)) < 0) {
+        if ((status = i2c_read_register(SLAVE_I2C_ADDRESS, trans->target2initiator_offset, split_trans_target2initiator_buffer(trans), len, SLAVE_I2C_TIMEOUT)) < 0) {
             return false;
         }
         memcpy(target2initiator_buf, split_trans_target2initiator_buffer(trans), len);