i2c: correct I2C deblock logic

Current code use dm_gpio_get_value() to get SDA and SCL value, and the
value depends on whether DTS file config the GPIO_ACTIVE_LOW. In ususal
case for i2c GPIO, DTS need to set GPIO_ACTIVE_LOW for SCL/SDA pins. So
here the logic is not correct.

And we must not use GPIOD_ACTIVE_LOW in client code include the
dm_gpio_set_dir_flags(), it is DTS's responsibility for this flag. So
remove GPIOD_ACTIVE_LOW here.

Fixes: aa54192d4a87 ("dm: i2c: implement gpio-based I2C deblock")
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Reviewed-by: Alexander Kochetkov <al.kochet@gmail.com <mailto:al.kochet@gmail.com>>

diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c
index 8d9a89ed8905e2d2e58aca88a9eef055157ee93b..8867a560bd8e8264db24310dbd324e31cdb36c16 100644 (file)
--- a/drivers/i2c/i2c-uclass.c
+++ b/drivers/i2c/i2c-uclass.c
@@ -508,13 +508,13 @@ static void i2c_gpio_set_pin(struct gpio_desc *pin, int bit)
                dm_gpio_set_dir_flags(pin, GPIOD_IS_IN);
        else
                dm_gpio_set_dir_flags(pin, GPIOD_IS_OUT |
-                                          GPIOD_ACTIVE_LOW |
                                           GPIOD_IS_OUT_ACTIVE);
 }
 
 static int i2c_gpio_get_pin(struct gpio_desc *pin)
 {
-       return dm_gpio_get_value(pin);
+       /* DTS need config GPIO_ACTIVE_LOW */
+       return !dm_gpio_get_value(pin);
 }
 
 int i2c_deblock_gpio_loop(struct gpio_desc *sda_pin,