blob: c387faf5a66626f13ef5de88fd8eb72697c60fe6
| 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 | #define BACKLIGHT "/sys/class/backlight/aml-bl/brightness" |
| 9 | |
| 10 | static int set_light_backlight(struct light_device_t* dev, |
| 11 | struct light_state_t const* state) |
| 12 | { |
| 13 | int nwr, ret = -1, fd; |
| 14 | char value[20]; |
| 15 | int light_level; |
| 16 | light_level =state->color&0xff; |
| 17 | |
| 18 | fd = open(BACKLIGHT, O_RDWR); |
| 19 | if (fd > 0) { |
| 20 | nwr = sprintf(value, "%d\n", light_level); |
| 21 | ret = write(fd, value, nwr); |
| 22 | close(fd); |
| 23 | } |
| 24 | |
| 25 | return ret; |
| 26 | } |
| 27 | |
| 28 | static int open_lights(const struct hw_module_t* module, char const* name, |
| 29 | struct hw_device_t** device) |
| 30 | { |
| 31 | int res = -EINVAL; |
| 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 | memset(dev, 0, sizeof(*dev)); |
| 40 | dev->common.tag = HARDWARE_DEVICE_TAG; |
| 41 | dev->common.version = 0; |
| 42 | dev->common.module = (struct hw_module_t*)module; |
| 43 | dev->common.close = NULL; |
| 44 | dev->set_light = set_light_backlight; |
| 45 | |
| 46 | *device = (struct hw_device_t*)dev; |
| 47 | res = 0; |
| 48 | } |
| 49 | |
| 50 | return res; |
| 51 | } |
| 52 | |
| 53 | static struct hw_module_methods_t lights_module_methods = { |
| 54 | .open = open_lights, |
| 55 | }; |
| 56 | |
| 57 | const struct hw_module_t HAL_MODULE_INFO_SYM = { |
| 58 | .tag = HARDWARE_MODULE_TAG, |
| 59 | .version_major = 1, |
| 60 | .version_minor = 0, |
| 61 | .id = LIGHTS_HARDWARE_MODULE_ID, |
| 62 | .name = "Backlight", |
| 63 | .author = "Amlogic", |
| 64 | .methods = &lights_module_methods, |
| 65 | }; |
| 66 |