linux-kernel - [PATCH 2/2] gpio: pca953x: Fix pca953x_gpio_set

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Date:   Sat, 11 Apr 2020 20:33:52 -0500
From:   Adam Ford <aford173@...il.com>
To:     linux-gpio@...r.kernel.org
Cc:     aford@...conembedded.com, Adam Ford <aford173@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] gpio: pca953x: Fix pca953x_gpio_set_config

pca953x_gpio_set_config is setup to support pull-up/down
bias.  Currently the driver uses a variable called 'config' to
determine which options to use.  Unfortunately, this is incorrect.

This patch uses function pinconf_to_config_param(config), which
converts this 'config' parameter back to pinconfig to determine
which option to use.

Fixes: 15add06841a3 ("gpio: pca953x: add ->set_config implementation")

Signed-off-by: Adam Ford <aford173@...il.com>

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 5638b4e5355f..4269ea9a817e 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -531,7 +531,7 @@ static int pca953x_gpio_set_config(struct gpio_chip *gc, unsigned int offset,
 {
 	struct pca953x_chip *chip = gpiochip_get_data(gc);
 
-	switch (config) {
+	switch (pinconf_to_config_param(config)) {
 	case PIN_CONFIG_BIAS_PULL_UP:
 	case PIN_CONFIG_BIAS_PULL_DOWN:
 		return pca953x_gpio_set_pull_up_down(chip, offset, config);
-- 
2.25.1