eng33
54 lines
1.2 KiB
C
Executable File
54 lines
1.2 KiB
C
Executable File
/*
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* Copyright (c) 2022 rockchip
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*
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*/
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#include "rk_led.h"
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include "rk_sysfs.h"
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#define GPIO_SYSFS_PATH "/sys/class/leds"
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int rk_led_set_mode(char *dev_path, bool blink, uint32_t brightness) {
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int ret;
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char file[64];
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if (access(GPIO_SYSFS_PATH, F_OK)) {
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printf("warning: /sys/class/leds is not exit\n");
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return -1;
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}
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if (!dev_path) {
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printf("rk_led_set_mode: dev_path is null\n");
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return -1;
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}
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ret = sprintf(file, "%s/%s", GPIO_SYSFS_PATH, dev_path);
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if (ret < 0)
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return ret;
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ret = write_sysfs_int("brightness", file, brightness);
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if (ret < 0) {
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printf("switch led fail\n");
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return -1;
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}
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if (brightness > 0) {
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const char *flag = blink ? "timer" : "none";
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ret = write_sysfs_string("trigger", file, flag);
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if (ret < 0) {
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printf("controll blink fail\n");
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return -1;
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}
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if (!blink) {
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ret = write_sysfs_int("brightness", file, brightness);
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if (ret < 0)
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printf("switch led fail\n");
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}
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}
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return 0;
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}
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