diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/led/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/led/led-uclass.c | 32 | ||||
| -rw-r--r-- | drivers/led/led_gpio.c | 39 |
3 files changed, 71 insertions, 10 deletions
diff --git a/drivers/led/Kconfig b/drivers/led/Kconfig index 609b1fa3fe..309372ab56 100644 --- a/drivers/led/Kconfig +++ b/drivers/led/Kconfig @@ -9,6 +9,15 @@ config LED can provide access to board-specific LEDs. Use of the device tree for configuration is encouraged. +config LED_BLINK + bool "Support LED blinking" + depends on LED + help + Some drivers can support automatic blinking of LEDs with a given + period, without needing timers or extra code to handle the timing. + This option enables support for this which adds slightly to the + code size. + config SPL_LED bool "Enable LED support in SPL" depends on SPL && SPL_DM @@ -17,6 +26,7 @@ config SPL_LED If this is acceptable and you have a need to use LEDs in SPL, enable this option. You will need to enable device tree in SPL for this to work. + config LED_GPIO bool "LED support for GPIO-connected LEDs" depends on LED && DM_GPIO diff --git a/drivers/led/led-uclass.c b/drivers/led/led-uclass.c index 784ac870e2..78ab76050d 100644 --- a/drivers/led/led-uclass.c +++ b/drivers/led/led-uclass.c @@ -22,7 +22,7 @@ int led_get_by_label(const char *label, struct udevice **devp) if (ret) return ret; uclass_foreach_dev(dev, uc) { - struct led_uclass_plat *uc_plat = dev_get_uclass_platdata(dev); + struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev); /* Ignore the top-level LED node */ if (uc_plat->label && !strcmp(label, uc_plat->label)) @@ -32,18 +32,40 @@ int led_get_by_label(const char *label, struct udevice **devp) return -ENODEV; } -int led_set_on(struct udevice *dev, int on) +int led_set_state(struct udevice *dev, enum led_state_t state) { struct led_ops *ops = led_get_ops(dev); - if (!ops->set_on) + if (!ops->set_state) return -ENOSYS; - return ops->set_on(dev, on); + return ops->set_state(dev, state); } +enum led_state_t led_get_state(struct udevice *dev) +{ + struct led_ops *ops = led_get_ops(dev); + + if (!ops->get_state) + return -ENOSYS; + + return ops->get_state(dev); +} + +#ifdef CONFIG_LED_BLINK +int led_set_period(struct udevice *dev, int period_ms) +{ + struct led_ops *ops = led_get_ops(dev); + + if (!ops->set_period) + return -ENOSYS; + + return ops->set_period(dev, period_ms); +} +#endif + UCLASS_DRIVER(led) = { .id = UCLASS_LED, .name = "led", - .per_device_platdata_auto_alloc_size = sizeof(struct led_uclass_plat), + .per_device_platdata_auto_alloc_size = sizeof(struct led_uc_plat), }; diff --git a/drivers/led/led_gpio.c b/drivers/led/led_gpio.c index 5b119903f5..4106ecb679 100644 --- a/drivers/led/led_gpio.c +++ b/drivers/led/led_gpio.c @@ -18,19 +18,47 @@ struct led_gpio_priv { struct gpio_desc gpio; }; -static int gpio_led_set_on(struct udevice *dev, int on) +static int gpio_led_set_state(struct udevice *dev, enum led_state_t state) { struct led_gpio_priv *priv = dev_get_priv(dev); + int ret; + + if (!dm_gpio_is_valid(&priv->gpio)) + return -EREMOTEIO; + switch (state) { + case LEDST_OFF: + case LEDST_ON: + break; + case LEDST_TOGGLE: + ret = dm_gpio_get_value(&priv->gpio); + if (ret < 0) + return ret; + state = !ret; + break; + default: + return -ENOSYS; + } + + return dm_gpio_set_value(&priv->gpio, state); +} + +static enum led_state_t gpio_led_get_state(struct udevice *dev) +{ + struct led_gpio_priv *priv = dev_get_priv(dev); + int ret; if (!dm_gpio_is_valid(&priv->gpio)) return -EREMOTEIO; + ret = dm_gpio_get_value(&priv->gpio); + if (ret < 0) + return ret; - return dm_gpio_set_value(&priv->gpio, on); + return ret ? LEDST_ON : LEDST_OFF; } static int led_gpio_probe(struct udevice *dev) { - struct led_uclass_plat *uc_plat = dev_get_uclass_platdata(dev); + struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev); struct led_gpio_priv *priv = dev_get_priv(dev); /* Ignore the top-level LED node */ @@ -65,7 +93,7 @@ static int led_gpio_bind(struct udevice *parent) for (node = fdt_first_subnode(blob, dev_of_offset(parent)); node > 0; node = fdt_next_subnode(blob, node)) { - struct led_uclass_plat *uc_plat; + struct led_uc_plat *uc_plat; const char *label; label = fdt_getprop(blob, node, "label", NULL); @@ -87,7 +115,8 @@ static int led_gpio_bind(struct udevice *parent) } static const struct led_ops gpio_led_ops = { - .set_on = gpio_led_set_on, + .set_state = gpio_led_set_state, + .get_state = gpio_led_get_state, }; static const struct udevice_id led_gpio_ids[] = { |