diff options
Diffstat (limited to 'include/usb_i2c.h')
| -rw-r--r-- | include/usb_i2c.h | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/include/usb_i2c.h b/include/usb_i2c.h index 335550b66e..c464e062a5 100644 --- a/include/usb_i2c.h +++ b/include/usb_i2c.h @@ -45,6 +45,7 @@ * 0x0003: Write count invalid (mismatch with merged payload) * 0x0004: Read count invalid (> 60 bytes) * 0x0005: The port specified is invalid. + * 0x0006: The I2C interface is disabled. * 0x8000: Unknown error mask * The bottom 15 bits will contain the bottom 15 bits from the EC * error code. @@ -60,6 +61,7 @@ enum usb_i2c_error { USB_I2C_WRITE_COUNT_INVALID = 0x0003, USB_I2C_READ_COUNT_INVALID = 0x0004, USB_I2C_PORT_INVALID = 0x0005, + USB_I2C_DISABLED = 0x0006, USB_I2C_UNKNOWN_ERROR = 0x8000, }; @@ -149,8 +151,27 @@ void usb_i2c_deferred(struct usb_i2c_config const *config); /* * These functions should be implemented by the board to provide any board - * specific operations required to enable or disable access to the I2C device. + * specific operations required to enable or disable access to the I2C device, + * and to return the current board enable state. + */ + +/** + * Enable the I2C device + * + * @return EC_SUCCESS or non-zero error code. */ int usb_i2c_board_enable(void); + +/** + * Disable the I2C device + */ void usb_i2c_board_disable(void); + +/** + * Check if the I2C device is enabled + * + * @return 1 if enabled, 0 if disabled. + */ +int usb_i2c_board_is_enabled(void); + #endif /* __CROS_USB_I2C_H */ |