| Message ID | 20180712162854.8280-1-wsa+renesas@sang-engineering.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Geert Uytterhoeven |
| Headers | show |
On Thu, Jul 12, 2018 at 06:28:54PM +0200, Wolfram Sang wrote: > This check did not work as intended. I2C is open drain, so this function > will likely always have presented the GPIO as input because > gpiod_get_direction doesn't know about open drain states. Remove this > check for now. We can add it again once we know how to get more precise > information about the GPIO. > > Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> > --- > drivers/i2c/i2c-core-base.c | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > > diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c > index 57538d72f2e5..4debf921ab5c 100644 > --- a/drivers/i2c/i2c-core-base.c > +++ b/drivers/i2c/i2c-core-base.c > @@ -269,9 +269,7 @@ static void i2c_init_recovery(struct i2c_adapter *adap) > bri->set_scl = set_scl_gpio_value; > if (bri->sda_gpiod) { > bri->get_sda = get_sda_gpio_value; > - /* FIXME: add proper flag instead of '0' once available */ > - if (gpiod_get_direction(bri->sda_gpiod) == 0) > - bri->set_sda = set_sda_gpio_value; > + bri->set_sda = set_sda_gpio_value; > } > return; > } > -- > 2.11.0 >
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index 57538d72f2e5..4debf921ab5c 100644 --- a/drivers/i2c/i2c-core-base.c +++ b/drivers/i2c/i2c-core-base.c @@ -269,9 +269,7 @@ static void i2c_init_recovery(struct i2c_adapter *adap) bri->set_scl = set_scl_gpio_value; if (bri->sda_gpiod) { bri->get_sda = get_sda_gpio_value; - /* FIXME: add proper flag instead of '0' once available */ - if (gpiod_get_direction(bri->sda_gpiod) == 0) - bri->set_sda = set_sda_gpio_value; + bri->set_sda = set_sda_gpio_value; } return; }
This check did not work as intended. I2C is open drain, so this function will likely always have presented the GPIO as input because gpiod_get_direction doesn't know about open drain states. Remove this check for now. We can add it again once we know how to get more precise information about the GPIO. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> --- drivers/i2c/i2c-core-base.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)