i2c: Export i2c_deblock_gpio_loop()
Export the i2c_deblock_gpio_loop() so it can be used in other places in
U-Boot. In particular, this is useful in the GPIO I2C driver, which claims
the SDA/SCL GPIOs and thus prevents the i2c_deblock() implementation from
claiming the pins as GPIOs again.
Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c
index 25af1fa..86f5292 100644
--- a/drivers/i2c/i2c-uclass.c
+++ b/drivers/i2c/i2c-uclass.c
@@ -501,10 +501,10 @@
return dm_gpio_get_value(pin);
}
-static int i2c_deblock_gpio_loop(struct gpio_desc *sda_pin,
- struct gpio_desc *scl_pin,
- unsigned int scl_count,
- unsigned int delay)
+int i2c_deblock_gpio_loop(struct gpio_desc *sda_pin,
+ struct gpio_desc *scl_pin,
+ unsigned int scl_count,
+ unsigned int delay)
{
int ret = 0;
diff --git a/include/i2c.h b/include/i2c.h
index 0faf854..7c92042 100644
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -331,6 +331,22 @@
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
+ * @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 delay);
+
+/**
* struct dm_i2c_ops - driver operations for I2C uclass
*
* Drivers should support these operations unless otherwise noted. These