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| author | Haibo Chen <haibo.chen@nxp.com> | 2023-03-27 19:21:43 +0800 |
|---|---|---|
| committer | Heiko Schocher <hs@denx.de> | 2023-04-11 06:44:39 +0200 |
| commit | 7f6a2e6e0f7694bf9557683db1d6ef2fc75ef1c8 (patch) | |
| tree | 778c314948de12bd99adf009bde5c10fb90e2fd9 /drivers | |
| parent | d600b0fcbbfe877f67fb8b89e4d09aeb376c01d1 (diff) | |
| download | u-boot-7f6a2e6e0f7694bf9557683db1d6ef2fc75ef1c8.tar.gz u-boot-7f6a2e6e0f7694bf9557683db1d6ef2fc75ef1c8.tar.bz2 u-boot-7f6a2e6e0f7694bf9557683db1d6ef2fc75ef1c8.zip | |
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>>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/i2c/i2c-uclass.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c index 8d9a89ed89..8867a560bd 100644 --- 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, |