[PATCH v4 3/5] gpio: pca953x: Fix pca953x_gpio_set_pull_up_down()

[Martyn Welch <martyn.welch@collabora.co.uk>]

From: Martyn Welch <martyn.welch@collabora.com>

A previous fix, commit dc87f6dd058a ("gpio: pca953x: Fix
pca953x_gpio_set_config"), identified that pinconf_to_config_param() needed
to be used to isolate the config_param from the pinconf in
pca953x_gpio_set_config(). This fix however did not consider that this
would also be needed in pca953x_gpio_set_pull_up_down() to which it passes
this config.

Perform a similar call in pca953x_gpio_set_pull_up_down() to isolate the
configuration parameter there as well, rather than passing it from
pca953x_gpio_set_config() as the configuration argument may also be needed
in pca953x_gpio_set_pull_up_down() at a later date.

Signed-off-by: Martyn Welch <martyn.welch@collabora.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
---

Changes in v2:
 - Re-order enum before u8

Changes in v3:
 - None

Changes in v4:
 - None

 drivers/gpio/gpio-pca953x.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index ecd7d169470b..62367c9d6e99 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -548,6 +548,8 @@ static int pca953x_gpio_set_pull_up_down(struct pca953x_chip *chip,
 					 unsigned int offset,
 					 unsigned long config)
 {
+	enum pin_config_param param = pinconf_to_config_param(config);
+
 	u8 pull_en_reg = pca953x_recalc_addr(chip, PCAL953X_PULL_EN, offset);
 	u8 pull_sel_reg = pca953x_recalc_addr(chip, PCAL953X_PULL_SEL, offset);
 	u8 bit = BIT(offset % BANK_SZ);
@@ -563,9 +565,9 @@ static int pca953x_gpio_set_pull_up_down(struct pca953x_chip *chip,
 	mutex_lock(&chip->i2c_lock);
 
 	/* Configure pull-up/pull-down */
-	if (config == PIN_CONFIG_BIAS_PULL_UP)
+	if (param == PIN_CONFIG_BIAS_PULL_UP)
 		ret = regmap_write_bits(chip->regmap, pull_sel_reg, bit, bit);
-	else if (config == PIN_CONFIG_BIAS_PULL_DOWN)
+	else if (param == PIN_CONFIG_BIAS_PULL_DOWN)
 		ret = regmap_write_bits(chip->regmap, pull_sel_reg, bit, 0);
 	else
 		ret = 0;
@@ -573,7 +575,7 @@ static int pca953x_gpio_set_pull_up_down(struct pca953x_chip *chip,
 		goto exit;
 
 	/* Disable/Enable pull-up/pull-down */
-	if (config == PIN_CONFIG_BIAS_DISABLE)
+	if (param == PIN_CONFIG_BIAS_DISABLE)
 		ret = regmap_write_bits(chip->regmap, pull_en_reg, bit, 0);
 	else
 		ret = regmap_write_bits(chip->regmap, pull_en_reg, bit, bit);
-- 
2.35.1