path: root/lights.c (plain)
blob: f0c1cb5f67ed0640286e575db2931c499e7b4f76

1	#include <stdio.h>
2	#include <unistd.h>
3	#include <fcntl.h>
4	#include <errno.h>
5	#include <hardware/lights.h>
6	#include <hardware/hardware.h>
7
8
9	#define BACKLIGHT "/sys/class/backlight/aml-bl/brightness"
10	static int set_light_backlight(struct light_device_t* dev,
11	struct light_state_t const* state)
12	{
13	int nwr, ret, fd;
14	char value[20];
15	int light_level;
16	light_level =state->color&0xff;
17
18	fd = open(BACKLIGHT, O_RDWR);
19	nwr = sprintf(value, "%d\n", light_level);
20	ret = write(fd, value, nwr);
21	close(fd);
22
23	return ret;
24	}
25
26	static int open_lights(const struct hw_module_t* module, char const* name,
27	struct hw_device_t** device)
28	{
29	int res = -EINVAL;
30	int (*set_light)(struct light_device_t* dev,
31	struct light_state_t const* state);
32
33	if (strcmp(LIGHT_ID_BACKLIGHT, name) == 0) {
34	struct light_device_t *dev = malloc(sizeof(struct light_device_t));
35	if (!dev) {
36	return res;
37	}
38
39	set_light = set_light_backlight;
40
41	memset(dev, 0, sizeof(*dev));
42	dev->common.tag = HARDWARE_DEVICE_TAG;
43	dev->common.version = 0;
44	dev->common.module = (struct hw_module_t*)module;
45	dev->common.close = NULL;
46	dev->set_light = set_light;
47
48	*device = (struct hw_device_t*)dev;
49	res = 0;
50	}
51	return res;
52	}
53
54
55
56
57	static struct hw_module_methods_t lights_module_methods = {
58	.open = open_lights,
59	};
60	const struct hw_module_t HAL_MODULE_INFO_SYM = {
61	.tag = HARDWARE_MODULE_TAG,
62	.version_major = 1,
63	.version_minor = 0,
64	.id = LIGHTS_HARDWARE_MODULE_ID,
65	.name = "lights Module",
66	.author = "",
67	.methods = &lights_module_methods,
68	};
69
70
71