linux-kernel - [PATCH 3/5] gpio: pca953x: Fix pca953x_gpio_set_pull_up

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Date:   Mon, 29 Aug 2022 14:39:20 +0100
From:   Martyn Welch <martyn.welch@...labora.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>
Cc:     kernel@...labora.com, Martyn Welch <martyn.welch@...labora.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/5] gpio: pca953x: Fix pca953x_gpio_set_pull_up_down()

A previous fix (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@...labora.com>
---
 drivers/gpio/gpio-pca953x.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index ecd7d169470b..41e7ff83a735 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -551,6 +551,7 @@ static int pca953x_gpio_set_pull_up_down(struct pca953x_chip *chip,
 	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);
+	enum pin_config_param param = pinconf_to_config_param(config);
 	int ret;
 
 	/*
@@ -563,9 +564,9 @@ 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 +574,7 @@ 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