diff options
Diffstat (limited to 'include/i2c.h')
| -rw-r--r-- | include/i2c.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/i2c.h b/include/i2c.h index 0faf8542e2..059200115a 100644 --- a/include/i2c.h +++ b/include/i2c.h @@ -331,6 +331,24 @@ uint i2c_get_chip_addr_offset_mask(struct udevice *dev); int i2c_deblock(struct udevice *bus); /** + * i2c_deblock_gpio_loop() - recover a bus from an unknown state by toggling SDA/SCL + * + * This is the inner logic used for toggling I2C SDA/SCL lines as GPIOs + * for deblocking the I2C bus. + * + * @sda_pin: SDA GPIO + * @scl_pin: SCL GPIO + * @scl_count: Number of SCL clock cycles generated to deblock SDA + * @start_count:Number of I2C start conditions sent after deblocking SDA + * @delay: Delay between SCL clock line changes + * @return 0 if OK, -ve on error + */ +struct gpio_desc; +int i2c_deblock_gpio_loop(struct gpio_desc *sda_pin, struct gpio_desc *scl_pin, + unsigned int scl_count, unsigned int start_count, + unsigned int delay); + +/** * struct dm_i2c_ops - driver operations for I2C uclass * * Drivers should support these operations unless otherwise noted. These |