pinctrl: at91-pio4: Fix slew rate disablement

The slew rate was enabled by default for each configuration of the
pin. In case the pin had more than one configuration, even if
we set the slew rate as disabled in the device tree, the next pin
configuration would set again the slew rate enabled by default,
overwriting the slew rate disablement.
Instead of enabling the slew rate by default for each pin configuration,
enable the slew rate by default just once per pin, regardless of the
number of configurations. This way the slew rate disablement will also
work for cases where pins have multiple configurations.

Fixes: c709135e576b ("pinctrl: at91-pio4: add support for slew-rate")
Signed-off-by: Tudor Ambarus <[email protected]>
Reviewed-by: Claudiu Beznea <[email protected]>
Acked-by: Ludovic Desroches <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Linus Walleij <[email protected]>

diff --git a/drivers/pinctrl/pinctrl-at91-pio4.c b/drivers/pinctrl/pinctrl-at91-pio4.c
index e71ebccc479cf8e76d4038144b79322e8a22619b..03c32b2c5d303315733acc1abb3e779f21d65bee 100644 (file)
--- a/drivers/pinctrl/pinctrl-at91-pio4.c
+++ b/drivers/pinctrl/pinctrl-at91-pio4.c
@@ -801,6 +801,10 @@ static int atmel_conf_pin_config_group_set(struct pinctrl_dev *pctldev,
 
        conf = atmel_pin_config_read(pctldev, pin_id);
 
+       /* Keep slew rate enabled by default. */
+       if (atmel_pioctrl->slew_rate_support)
+               conf |= ATMEL_PIO_SR_MASK;
+
        for (i = 0; i < num_configs; i++) {
                unsigned int param = pinconf_to_config_param(configs[i]);
                unsigned int arg = pinconf_to_config_argument(configs[i]);
@@ -808,10 +812,6 @@ static int atmel_conf_pin_config_group_set(struct pinctrl_dev *pctldev,
                dev_dbg(pctldev->dev, "%s: pin=%u, config=0x%lx\n",
                        __func__, pin_id, configs[i]);
 
-               /* Keep slew rate enabled by default. */
-               if (atmel_pioctrl->slew_rate_support)
-                       conf |= ATMEL_PIO_SR_MASK;
-
                switch (param) {
                case PIN_CONFIG_BIAS_DISABLE:
                        conf &= (~ATMEL_PIO_PUEN_MASK);