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10#include <linux/module.h>
11#include <linux/err.h>
12#include <linux/slab.h>
13#include <linux/leds.h>
14#include <linux/platform_device.h>
15#include "nvec.h"
16
17#define to_nvec_led(led_cdev) \
18 container_of(led_cdev, struct nvec_led, cdev)
19
20#define NVEC_LED_REQ {'\x0d', '\x10', '\x45', '\x10', '\x00'}
21
22#define NVEC_LED_MAX 8
23
24struct nvec_led {
25 struct led_classdev cdev;
26 struct nvec_chip *nvec;
27};
28
29static void nvec_led_brightness_set(struct led_classdev *led_cdev,
30 enum led_brightness value)
31{
32 struct nvec_led *led = to_nvec_led(led_cdev);
33 unsigned char buf[] = NVEC_LED_REQ;
34
35 buf[4] = value;
36
37 nvec_write_async(led->nvec, buf, sizeof(buf));
38
39 led->cdev.brightness = value;
40}
41
42static int nvec_paz00_probe(struct platform_device *pdev)
43{
44 struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
45 struct nvec_led *led;
46 int ret = 0;
47
48 led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL);
49 if (!led)
50 return -ENOMEM;
51
52 led->cdev.max_brightness = NVEC_LED_MAX;
53
54 led->cdev.brightness_set = nvec_led_brightness_set;
55 led->cdev.name = "paz00-led";
56 led->cdev.flags |= LED_CORE_SUSPENDRESUME;
57 led->nvec = nvec;
58
59 platform_set_drvdata(pdev, led);
60
61 ret = devm_led_classdev_register(&pdev->dev, &led->cdev);
62 if (ret < 0)
63 return ret;
64
65
66 led->cdev.brightness = 0;
67
68 return 0;
69}
70
71static struct platform_driver nvec_paz00_driver = {
72 .probe = nvec_paz00_probe,
73 .driver = {
74 .name = "nvec-paz00",
75 },
76};
77
78module_platform_driver(nvec_paz00_driver);
79
80MODULE_AUTHOR("Ilya Petrov <ilya.muromec@gmail.com>");
81MODULE_DESCRIPTION("Tegra NVEC PAZ00 driver");
82MODULE_LICENSE("GPL");
83MODULE_ALIAS("platform:nvec-paz00");
84