i2c: Make deblock delay and SCL clock configurable
Make the delay between SCL line changes and the number of SCL clock
changes configurable as a parameter of the deblock function. No
functional change.
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 2aa3efe..25af1fa 100644
--- a/drivers/i2c/i2c-uclass.c
+++ b/drivers/i2c/i2c-uclass.c
@@ -502,34 +502,35 @@
}
static int i2c_deblock_gpio_loop(struct gpio_desc *sda_pin,
- struct gpio_desc *scl_pin)
+ struct gpio_desc *scl_pin,
+ unsigned int scl_count,
+ unsigned int delay)
{
- int counter = 9;
int ret = 0;
i2c_gpio_set_pin(sda_pin, 1);
i2c_gpio_set_pin(scl_pin, 1);
- udelay(5);
+ udelay(delay);
/* Toggle SCL until slave release SDA */
- while (counter-- >= 0) {
+ while (scl_count-- >= 0) {
i2c_gpio_set_pin(scl_pin, 1);
- udelay(5);
+ udelay(delay);
i2c_gpio_set_pin(scl_pin, 0);
- udelay(5);
+ udelay(delay);
if (i2c_gpio_get_pin(sda_pin))
break;
}
/* Then, send I2C stop */
i2c_gpio_set_pin(sda_pin, 0);
- udelay(5);
+ udelay(delay);
i2c_gpio_set_pin(scl_pin, 1);
- udelay(5);
+ udelay(delay);
i2c_gpio_set_pin(sda_pin, 1);
- udelay(5);
+ udelay(delay);
if (!i2c_gpio_get_pin(sda_pin) || !i2c_gpio_get_pin(scl_pin))
ret = -EREMOTEIO;
@@ -561,7 +562,7 @@
goto out_no_pinctrl;
}
- ret0 = i2c_deblock_gpio_loop(&gpios[PIN_SDA], &gpios[PIN_SCL]);
+ ret0 = i2c_deblock_gpio_loop(&gpios[PIN_SDA], &gpios[PIN_SCL], 9, 5);
ret = pinctrl_select_state(bus, "default");
if (ret) {