[DM/FEATURE] Support LED

Provides general LED control API and drivers.
It can work on PWM, GPIO and Syscon...

Signed-off-by: GuEe-GUI <2991707448@qq.com>

components/drivers/Kconfig

@@ -21,6 +21,7 @@ rsource "touch/Kconfig"
 rsource "graphic/Kconfig"
 rsource "hwcrypto/Kconfig"
 rsource "wlan/Kconfig"
+rsource "led/Kconfig"
 rsource "mailbox/Kconfig"
 rsource "phye/Kconfig"
 rsource "ata/Kconfig"

components/drivers/include/drivers/led.h

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-3-08      GuEe-GUI     the first version
+ */
+
+#ifndef __LED_H__
+#define __LED_H__
+
+#include <rthw.h>
+#include <rtdef.h>
+
+struct rt_led_ops;
+
+enum rt_led_state
+{
+    RT_LED_S_OFF,
+    RT_LED_S_ON,
+    RT_LED_S_TOGGLE,
+    RT_LED_S_BLINK,
+
+    RT_LED_STATE_NR,
+};
+
+struct rt_led_device
+{
+    struct rt_device parent;
+
+    const struct rt_led_ops *ops;
+
+    struct rt_spinlock spinlock;
+
+    void *sysdata;
+    void *priv;
+};
+
+struct rt_led_ops
+{
+    rt_err_t (*set_state)(struct rt_led_device *led, enum rt_led_state state);
+    rt_err_t (*get_state)(struct rt_led_device *led, enum rt_led_state *out_state);
+    rt_err_t (*set_period)(struct rt_led_device *led, rt_uint32_t period_ms);
+    rt_err_t (*set_brightness)(struct rt_led_device *led, rt_uint32_t brightness);
+};
+
+rt_err_t rt_hw_led_register(struct rt_led_device *led);
+rt_err_t rt_hw_led_unregister(struct rt_led_device *led);
+
+rt_err_t rt_led_set_state(struct rt_led_device *led, enum rt_led_state state);
+rt_err_t rt_led_get_state(struct rt_led_device *led, enum rt_led_state *out_state);
+rt_err_t rt_led_set_period(struct rt_led_device *led, rt_uint32_t period_ms);
+rt_err_t rt_led_set_brightness(struct rt_led_device *led, rt_uint32_t brightness);
+
+#endif /* __LED_H__ */

components/drivers/include/rtdevice.h

@@ -51,6 +51,10 @@ extern "C" {
 #endif /* RT_ATA_AHCI */
 #endif /* RT_USING_ATA */
 
+#ifdef RT_USING_LED
+#include "drivers/led.h"
+#endif
+
 #ifdef RT_USING_MBOX
 #include "drivers/mailbox.h"
 #endif /* RT_USING_MBOX */

components/drivers/led/Kconfig

@@ -0,0 +1,8 @@
+menuconfig RT_USING_LED
+    bool "Using Light Emitting Diode (LED) device drivers"
+    depends on RT_USING_DM
+    default n
+
+if RT_USING_LED
+    osource "$(SOC_DM_LED_DIR)/Kconfig"
+endif

components/drivers/led/SConscript

@@ -0,0 +1,15 @@
+from building import *
+
+group = []
+
+if not GetDepend(['RT_USING_DM', 'RT_USING_LED']):
+    Return('group')
+
+cwd = GetCurrentDir()
+CPPPATH = [cwd + '/../include']
+
+src = ['led.c']
+
+group = DefineGroup('DeviceDrivers', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')