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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
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2 | /* drivers/leds/leds-s3c24xx.c |
3 | * | |
4 | * (c) 2006 Simtec Electronics | |
5 | * http://armlinux.simtec.co.uk/ | |
6 | * Ben Dooks <ben@simtec.co.uk> | |
7 | * | |
8 | * S3C24XX - LEDs GPIO driver | |
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9 | */ |
10 | ||
54bdc470 | 11 | #include <linux/kernel.h> |
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12 | #include <linux/platform_device.h> |
13 | #include <linux/leds.h> | |
f7f611f2 | 14 | #include <linux/gpio/consumer.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
54f4dedb | 16 | #include <linux/module.h> |
3cb6f44a | 17 | #include <linux/platform_data/leds-s3c24xx.h> |
54bdc470 | 18 | |
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19 | /* our context */ |
20 | ||
21 | struct s3c24xx_gpio_led { | |
22 | struct led_classdev cdev; | |
23 | struct s3c24xx_led_platdata *pdata; | |
f7f611f2 | 24 | struct gpio_desc *gpiod; |
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25 | }; |
26 | ||
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27 | static inline struct s3c24xx_gpio_led *to_gpio(struct led_classdev *led_cdev) |
28 | { | |
29 | return container_of(led_cdev, struct s3c24xx_gpio_led, cdev); | |
30 | } | |
31 | ||
32 | static void s3c24xx_led_set(struct led_classdev *led_cdev, | |
33 | enum led_brightness value) | |
34 | { | |
35 | struct s3c24xx_gpio_led *led = to_gpio(led_cdev); | |
54bdc470 | 36 | |
f7f611f2 | 37 | gpiod_set_value(led->gpiod, !!value); |
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38 | } |
39 | ||
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40 | static int s3c24xx_led_probe(struct platform_device *dev) |
41 | { | |
87aae1ea | 42 | struct s3c24xx_led_platdata *pdata = dev_get_platdata(&dev->dev); |
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43 | struct s3c24xx_gpio_led *led; |
44 | int ret; | |
45 | ||
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46 | led = devm_kzalloc(&dev->dev, sizeof(struct s3c24xx_gpio_led), |
47 | GFP_KERNEL); | |
0c9a03b6 | 48 | if (!led) |
54bdc470 | 49 | return -ENOMEM; |
54bdc470 | 50 | |
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51 | led->cdev.brightness_set = s3c24xx_led_set; |
52 | led->cdev.default_trigger = pdata->def_trigger; | |
53 | led->cdev.name = pdata->name; | |
859cb7f2 | 54 | led->cdev.flags |= LED_CORE_SUSPENDRESUME; |
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55 | |
56 | led->pdata = pdata; | |
57 | ||
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58 | /* Default to off */ |
59 | led->gpiod = devm_gpiod_get(&dev->dev, NULL, GPIOD_OUT_LOW); | |
60 | if (IS_ERR(led->gpiod)) | |
61 | return PTR_ERR(led->gpiod); | |
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62 | |
63 | /* register our new led device */ | |
48a7032b | 64 | ret = devm_led_classdev_register(&dev->dev, &led->cdev); |
7e97b581 | 65 | if (ret < 0) |
54bdc470 | 66 | dev_err(&dev->dev, "led_classdev_register failed\n"); |
54bdc470 | 67 | |
1522d02e | 68 | return ret; |
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69 | } |
70 | ||
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71 | static struct platform_driver s3c24xx_led_driver = { |
72 | .probe = s3c24xx_led_probe, | |
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73 | .driver = { |
74 | .name = "s3c24xx_led", | |
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75 | }, |
76 | }; | |
77 | ||
892a8843 | 78 | module_platform_driver(s3c24xx_led_driver); |
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79 | |
80 | MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); | |
81 | MODULE_DESCRIPTION("S3C24XX LED driver"); | |
82 | MODULE_LICENSE("GPL"); | |
3c4ded97 | 83 | MODULE_ALIAS("platform:s3c24xx_led"); |