From 914fd75a5d2f4cfa7828b48abed50a146063d1bd Mon Sep 17 00:00:00 2001 From: Christian Marangi Date: Tue, 1 Oct 2024 14:24:36 +0200 Subject: led: implement LED boot API Implement LED boot API to signal correct boot of the system. led_boot_on/off/blink() are introduced to turn ON, OFF and BLINK the designated boot LED. New Kconfig is introduced, CONFIG_LED_BOOT to enable the feature. This makes use of the /options/u-boot property "boot-led" to the define the boot LED. It's also introduced a new /options/u-boot property "boot-led-period" to define the default period when the LED is set to blink mode. If "boot-led-period" is not defined, the value of 250 (ms) is used by default. If CONFIG_LED_BLINK or CONFIG_LED_SW_BLINK is not enabled, led_boot_blink call will fallback to simple LED ON. To cache the data we repurpose the now unused led_uc_priv for storage of global LED uclass info. Signed-off-by: Christian Marangi Reviewed-by: Simon Glass --- include/led.h | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 53 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/include/led.h b/include/led.h index 99f93c5ef86..49ec2998a33 100644 --- a/include/led.h +++ b/include/led.h @@ -9,6 +9,7 @@ #include #include +#include struct udevice; @@ -52,10 +53,15 @@ struct led_uc_plat { /** * struct led_uc_priv - Private data the uclass stores about each device * - * @period_ms: Flash period in milliseconds + * @boot_led_label: Boot LED label + * @boot_led_dev: Boot LED dev + * @boot_led_period: Boot LED blink period */ struct led_uc_priv { - int period_ms; +#ifdef CONFIG_LED_BOOT + const char *boot_led_label; + int boot_led_period; +#endif }; struct led_ops { @@ -141,4 +147,49 @@ int led_sw_set_period(struct udevice *dev, int period_ms); bool led_sw_is_blinking(struct udevice *dev); bool led_sw_on_state_change(struct udevice *dev, enum led_state_t state); +#ifdef CONFIG_LED_BOOT + +/** + * led_boot_on() - turn ON the designated LED for booting + * + * Return: 0 if OK, -ve on error + */ +int led_boot_on(void); + +/** + * led_boot_off() - turn OFF the designated LED for booting + * + * Return: 0 if OK, -ve on error + */ +int led_boot_off(void); + +#if defined(CONFIG_LED_BLINK) || defined(CONFIG_LED_SW_BLINK) +/** + * led_boot_blink() - turn ON the designated LED for booting + * + * Return: 0 if OK, -ve on error + */ +int led_boot_blink(void); + +#else +/* If LED BLINK is not supported/enabled, fallback to LED ON */ +#define led_boot_blink led_boot_on +#endif +#else +static inline int led_boot_on(void) +{ + return -ENOSYS; +} + +static inline int led_boot_off(void) +{ + return -ENOSYS; +} + +static inline int led_boot_blink(void) +{ + return -ENOSYS; +} +#endif + #endif -- cgit v1.2.3