1 /* drivers/leds/leds-s3c24xx.c
7  * S3C24XX - LEDs GPIO driver
16 #include <linux/leds.h>
17 #include <linux/gpio.h>
20 #include <linux/platform_data/leds-s3c24xx.h>
22 #include <mach/regs-gpio.h>
23 #include <plat/gpio-cfg.h>
41 	struct s3c24xx_led_platdata *pd = led->pdata;  in s3c24xx_led_set()
42 	int state = (value ? 1 : 0) ^ (pd->flags & S3C24XX_LEDF_ACTLOW);  in s3c24xx_led_set()
47 	gpio_set_value(pd->gpio, state);  in s3c24xx_led_set()
49 	if (pd->flags & S3C24XX_LEDF_TRISTATE) {  in s3c24xx_led_set()
51 			gpio_direction_output(pd->gpio, state);  in s3c24xx_led_set()
53 			gpio_direction_input(pd->gpio);  in s3c24xx_led_set()
59 	struct s3c24xx_led_platdata *pdata = dev_get_platdata(&dev->dev);  in s3c24xx_led_probe()
63 	led = devm_kzalloc(&dev->dev, sizeof(struct s3c24xx_gpio_led),  in s3c24xx_led_probe()
66 		return -ENOMEM;  in s3c24xx_led_probe()
68 	led->cdev.brightness_set = s3c24xx_led_set;  in s3c24xx_led_probe()
69 	led->cdev.default_trigger = pdata->def_trigger;  in s3c24xx_led_probe()
70 	led->cdev.name = pdata->name;  in s3c24xx_led_probe()
71 	led->cdev.flags |= LED_CORE_SUSPENDRESUME;  in s3c24xx_led_probe()
73 	led->pdata = pdata;  in s3c24xx_led_probe()
75 	ret = devm_gpio_request(&dev->dev, pdata->gpio, "S3C24XX_LED");  in s3c24xx_led_probe()
79 	/* no point in having a pull-up if we are always driving */  in s3c24xx_led_probe()
81 	s3c_gpio_setpull(pdata->gpio, S3C_GPIO_PULL_NONE);  in s3c24xx_led_probe()
83 	if (pdata->flags & S3C24XX_LEDF_TRISTATE)  in s3c24xx_led_probe()
84 		gpio_direction_input(pdata->gpio);  in s3c24xx_led_probe()
86 		gpio_direction_output(pdata->gpio,  in s3c24xx_led_probe()
87 			pdata->flags & S3C24XX_LEDF_ACTLOW ? 1 : 0);  in s3c24xx_led_probe()
91 	ret = devm_led_classdev_register(&dev->dev, &led->cdev);  in s3c24xx_led_probe()
93 		dev_err(&dev->dev, "led_classdev_register failed\n");  in s3c24xx_led_probe()