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authorLinus Walleij <linus.walleij@linaro.org>2020-07-08 10:11:49 +0300
committerKrzysztof Kozlowski <krzk@kernel.org>2020-07-09 10:56:14 +0300
commitf7f611f2b1dc69547d425de0daeac548add2c761 (patch)
treea9bf264746e5c3741b8190cf5ac34d476f340cca /drivers/leds
parentea9dd8f61c8a890843f68e8dc0062ce78365aab8 (diff)
downloadlinux-f7f611f2b1dc69547d425de0daeac548add2c761.tar.xz
ARM: s3c24xx: leds: Convert to use GPIO descriptors
This converts the s3c24xx LED driver to use GPIO descriptors and also modify all board files to account for these changes by registering the appropriate GPIO tables for each board. The driver was using a custom flag to indicate open drain (tristate) but this can be handled by standard descriptor machine tables. The driver was setting non-pull-up for the pin using the custom S3C24xx GPIO API, but this is a custom pin control system used by the S3C24xx and no generic GPIO function, so this has simply been pushed back into the respective board files. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/leds-s3c24xx.c36
1 files changed, 7 insertions, 29 deletions
diff --git a/drivers/leds/leds-s3c24xx.c b/drivers/leds/leds-s3c24xx.c
index f8b8d6e313ee..9b5e67664ba3 100644
--- a/drivers/leds/leds-s3c24xx.c
+++ b/drivers/leds/leds-s3c24xx.c
@@ -11,19 +11,19 @@
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_data/leds-s3c24xx.h>
#include <mach/regs-gpio.h>
-#include <plat/gpio-cfg.h>
/* our context */
struct s3c24xx_gpio_led {
struct led_classdev cdev;
struct s3c24xx_led_platdata *pdata;
+ struct gpio_desc *gpiod;
};
static inline struct s3c24xx_gpio_led *to_gpio(struct led_classdev *led_cdev)
@@ -35,20 +35,8 @@ static void s3c24xx_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct s3c24xx_gpio_led *led = to_gpio(led_cdev);
- struct s3c24xx_led_platdata *pd = led->pdata;
- int state = (value ? 1 : 0) ^ (pd->flags & S3C24XX_LEDF_ACTLOW);
- /* there will be a short delay between setting the output and
- * going from output to input when using tristate. */
-
- gpio_set_value(pd->gpio, state);
-
- if (pd->flags & S3C24XX_LEDF_TRISTATE) {
- if (value)
- gpio_direction_output(pd->gpio, state);
- else
- gpio_direction_input(pd->gpio);
- }
+ gpiod_set_value(led->gpiod, !!value);
}
static int s3c24xx_led_probe(struct platform_device *dev)
@@ -69,22 +57,12 @@ static int s3c24xx_led_probe(struct platform_device *dev)
led->pdata = pdata;
- ret = devm_gpio_request(&dev->dev, pdata->gpio, "S3C24XX_LED");
- if (ret < 0)
- return ret;
-
- /* no point in having a pull-up if we are always driving */
-
- s3c_gpio_setpull(pdata->gpio, S3C_GPIO_PULL_NONE);
-
- if (pdata->flags & S3C24XX_LEDF_TRISTATE)
- gpio_direction_input(pdata->gpio);
- else
- gpio_direction_output(pdata->gpio,
- pdata->flags & S3C24XX_LEDF_ACTLOW ? 1 : 0);
+ /* Default to off */
+ led->gpiod = devm_gpiod_get(&dev->dev, NULL, GPIOD_OUT_LOW);
+ if (IS_ERR(led->gpiod))
+ return PTR_ERR(led->gpiod);
/* register our new led device */
-
ret = devm_led_classdev_register(&dev->dev, &led->cdev);
if (ret < 0)
dev_err(&dev->dev, "led_classdev_register failed\n");