[DM][LED] Update LED

components/drivers/led/Kconfig

@@ -10,6 +10,19 @@ config RT_LED_GPIO
     depends on RT_USING_OFW
     default n
 
+config RT_LED_PWM
+    bool "PWM driven LEDs Support"
+    depends on RT_USING_LED
+    depends on RT_USING_PWM
+    depends on RT_USING_OFW
+    default n
+
+config RT_LED_SYSCON
+    bool "System controllers connected LEDs Support"
+    depends on RT_USING_LED
+    depends on RT_MFD_SYSCON
+    default n
+
 if RT_USING_LED
     osource "$(SOC_DM_LED_DIR)/Kconfig"
 endif

components/drivers/led/SConscript

@@ -13,6 +13,12 @@ src = ['led.c']
 if GetDepend(['RT_LED_GPIO']):
     src += ['led-gpio.c']
 
+if GetDepend(['RT_LED_PWM']):
+    src += ['led-pwm.c']
+
+if GetDepend(['RT_LED_SYSCON']):
+    src += ['led-syscon.c']
+
 group = DefineGroup('DeviceDrivers', src, depend = [''], CPPPATH = CPPPATH)
 
 Return('group')

components/drivers/led/led-gpio.c

@@ -90,7 +90,7 @@ static rt_err_t ofw_append_gpio_led(struct rt_ofw_node *np)
     rt_err_t err;
     enum rt_led_state led_state = RT_LED_S_OFF;
     const char *propname, *state, *trigger;
-    struct gpio_led *gled = rt_malloc(sizeof(*gled));
+    struct gpio_led *gled = rt_calloc(1, sizeof(*gled));
 
     if (!gled)
     {

components/drivers/led/led-pwm.c

@@ -0,0 +1,303 @@
+/*
+ * 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
+ */
+
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#define DBG_TAG "led.pwm"
+#define DBG_LVL DBG_INFO
+#include <rtdbg.h>
+
+struct pwm_led
+{
+    struct rt_led_device parent;
+
+    struct rt_device_pwm *pwm_dev;
+    struct rt_pwm_configuration pwm_conf;
+
+    rt_uint32_t max_brightness;
+    rt_uint32_t brightness;
+    rt_bool_t active_low;
+    rt_bool_t enabled;
+};
+
+#define raw_to_pwm_led(raw) rt_container_of(raw, struct pwm_led, parent)
+
+static rt_err_t pwm_led_set_state(struct rt_led_device *led, enum rt_led_state state)
+{
+    rt_err_t err = RT_EOK;
+    struct rt_pwm_configuration pwm_conf = {};
+    struct pwm_led *pled = raw_to_pwm_led(led);
+
+    switch (state)
+    {
+    case RT_LED_S_OFF:
+        if ((err = rt_pwm_set(pled->pwm_dev,
+                pled->pwm_conf.channel, pled->pwm_conf.period, 0)))
+        {
+            break;
+        }
+
+        if (!(err = rt_pwm_disable(pled->pwm_dev, pled->pwm_conf.channel)))
+        {
+            pled->enabled = RT_FALSE;
+        }
+        break;
+
+    case RT_LED_S_ON:
+        pwm_conf.channel = pled->pwm_conf.channel;
+        pwm_conf.period = pled->pwm_conf.period;
+        pwm_conf.pulse = pled->pwm_conf.pulse;
+        pwm_conf.complementary = pled->active_low;
+
+        if ((err = rt_device_control(&pled->pwm_dev->parent, PWM_CMD_SET, &pwm_conf)))
+        {
+            break;
+        }
+
+        if (!(err = rt_pwm_enable(pled->pwm_dev, pled->pwm_conf.channel)))
+        {
+            pled->enabled = RT_TRUE;
+        }
+        break;
+
+    case RT_LED_S_TOGGLE:
+        err = led->ops->get_state(led, &state);
+
+        if (!err)
+        {
+            err = led->ops->set_state(led, state == RT_LED_S_OFF ? RT_LED_S_ON : RT_LED_S_OFF);
+        }
+        break;
+
+    default:
+        return -RT_ENOSYS;
+    }
+
+    return err;
+}
+
+static rt_err_t pwm_led_get_state(struct rt_led_device *led, enum rt_led_state *out_state)
+{
+    struct pwm_led *pled = raw_to_pwm_led(led);
+
+    *out_state = pled->enabled ? RT_LED_S_ON : RT_LED_S_OFF;
+
+    return RT_EOK;
+}
+
+static rt_err_t pwm_led_set_brightness(struct rt_led_device *led, rt_uint32_t brightness)
+{
+    struct pwm_led *pled = raw_to_pwm_led(led);
+    rt_uint64_t duty = pled->pwm_conf.period;
+
+    duty *= brightness;
+    rt_do_div(duty, pled->max_brightness);
+
+    if (pled->active_low)
+    {
+        duty = pled->pwm_conf.period - duty;
+    }
+
+    pled->pwm_conf.pulse = duty;
+
+    return rt_pwm_set(pled->pwm_dev,
+            pled->pwm_conf.channel, pled->pwm_conf.period, pled->pwm_conf.pulse);
+}
+
+const static struct rt_led_ops pwm_led_ops =
+{
+    .set_state = pwm_led_set_state,
+    .get_state = pwm_led_get_state,
+    .set_brightness = pwm_led_set_brightness,
+};
+
+static rt_err_t ofw_append_pwm_led(struct rt_ofw_node *np)
+{
+    rt_err_t err;
+    rt_bool_t need_set_brightness = RT_TRUE;
+    enum rt_led_state led_state = RT_LED_S_OFF;
+    const char *propname, *state, *trigger;
+    struct rt_ofw_node *pwm_np;
+    struct rt_ofw_cell_args pwm_args;
+    struct pwm_led *pled = rt_calloc(1, sizeof(*pled));
+
+    if (!pled)
+    {
+        return -RT_ENOMEM;
+    }
+
+    pled->active_low = rt_ofw_prop_read_bool(np, "active-low");
+
+    if (rt_ofw_prop_read_u32(np, "max-brightness", &pled->max_brightness))
+    {
+        err = -RT_EINVAL;
+        goto _fail;
+    }
+
+    if (rt_ofw_parse_phandle_cells(np, "pwms", "#pwm-cells", 0, &pwm_args))
+    {
+        err = -RT_EINVAL;
+        goto _fail;
+    }
+
+    pwm_np = pwm_args.data;
+
+    if (!rt_ofw_data(pwm_np))
+    {
+        rt_platform_ofw_request(pwm_np);
+    }
+
+    pled->pwm_dev = rt_ofw_data(pwm_np);
+    rt_ofw_node_put(pwm_np);
+
+    if (!pled->pwm_dev)
+    {
+        err = -RT_EINVAL;
+        goto _fail;
+    }
+
+    pled->pwm_conf.channel = pwm_args.args[0];
+    pled->pwm_conf.period = pwm_args.args[1];
+
+    pled->parent.ops = &pwm_led_ops;
+
+    if ((err = rt_led_register(&pled->parent)))
+    {
+        goto _fail;
+    }
+
+    if (!rt_ofw_prop_read_string(np, "default-state", &state))
+    {
+        rt_pwm_get(pled->pwm_dev, &pled->pwm_conf);
+
+        if (!rt_strcmp(state, "on"))
+        {
+            led_state = RT_LED_S_ON;
+            pled->brightness = pled->max_brightness;
+        }
+        else if (!rt_strcmp(state, "keep"))
+        {
+            if (pled->pwm_conf.period)
+            {
+                rt_uint64_t brightness;
+
+                brightness = pled->max_brightness;
+                brightness *= pled->pwm_conf.pulse;
+                rt_do_div(brightness, pled->pwm_conf.period);
+
+                pled->brightness = brightness;
+
+                need_set_brightness = RT_FALSE;
+            }
+            else
+            {
+                goto _out_state_check;
+            }
+        }
+
+        pled->pwm_conf.period = pwm_args.args[1];
+    }
+
+_out_state_check:
+    if ((propname = rt_ofw_get_prop_fuzzy_name(np, "default-trigger$")))
+    {
+        if (!rt_ofw_prop_read_string(np, propname, &trigger))
+        {
+            if (!rt_strcmp(trigger, "heartbeat") ||
+                !rt_strcmp(trigger, "timer"))
+            {
+                led_state = RT_LED_S_BLINK;
+            }
+        }
+    }
+
+    rt_led_set_state(&pled->parent, led_state);
+
+    if (need_set_brightness)
+    {
+        pwm_led_set_brightness(&pled->parent, pled->brightness);
+    }
+
+    rt_ofw_data(np) = &pled->parent;
+
+    return RT_EOK;
+
+_fail:
+    rt_free(pled);
+
+    return err;
+}
+
+static rt_err_t pwm_led_probe(struct rt_platform_device *pdev)
+{
+    struct rt_ofw_node *led_np, *np = pdev->parent.ofw_node;
+
+    rt_ofw_foreach_available_child_node(np, led_np)
+    {
+        rt_err_t err = ofw_append_pwm_led(led_np);
+
+        if (err == -RT_ENOMEM)
+        {
+            rt_ofw_node_put(led_np);
+
+            return err;
+        }
+        else if (err)
+        {
+            LOG_E("%s: create LED fail", rt_ofw_node_full_name(led_np));
+        }
+    }
+
+    return RT_EOK;
+}
+
+static rt_err_t pwm_led_remove(struct rt_platform_device *pdev)
+{
+    struct pwm_led *pled;
+    struct rt_led_device *led_dev;
+    struct rt_ofw_node *led_np, *np = pdev->parent.ofw_node;
+
+    rt_ofw_foreach_available_child_node(np, led_np)
+    {
+        led_dev = rt_ofw_data(led_np);
+
+        if (!led_dev)
+        {
+            continue;
+        }
+
+        pled = rt_container_of(led_dev, struct pwm_led, parent);
+
+        rt_ofw_data(led_np) = RT_NULL;
+
+        rt_led_unregister(&pled->parent);
+
+        rt_free(pled);
+    }
+
+    return RT_EOK;
+}
+
+static const struct rt_ofw_node_id pwm_led_ofw_ids[] =
+{
+    { .compatible = "pwm-leds" },
+    { /* sentinel */ }
+};
+
+static struct rt_platform_driver pwm_led_driver =
+{
+    .name = "led-pwm",
+    .ids = pwm_led_ofw_ids,
+
+    .probe = pwm_led_probe,
+    .remove = pwm_led_remove,
+};
+RT_PLATFORM_DRIVER_EXPORT(pwm_led_driver);