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 are introduced, CONFIG_LED_BOOT_ENABLE to enable the feature. This makes use of the /config property "u-boot,boot-led" to the define the boot LED. It's also introduced a new /config property "u-boot,boot-led-period" to define the default period when the LED is set to blink mode.
If "u-boot,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.
Signed-off-by: Christian Marangi ansuelsmth@gmail.com --- doc/device-tree-bindings/config.txt | 3 ++ drivers/led/Kconfig | 20 +++++++++ include/led.h | 64 +++++++++++++++++++++++++++++ 3 files changed, 87 insertions(+)
diff --git a/doc/device-tree-bindings/config.txt b/doc/device-tree-bindings/config.txt index f50c68bbdc3..68edd177040 100644 --- a/doc/device-tree-bindings/config.txt +++ b/doc/device-tree-bindings/config.txt @@ -31,6 +31,9 @@ u-boot,error-led (string) This is used to specify the label for an LED to indicate an error and a successful boot, on supported hardware.
+u-boot,boot-led-period (int) + This is used to specify the default period for an LED in blink mode. + bootsecure (int) Indicates that U-Boot should use secure_boot_cmd() to run commands, rather than the normal CLI. This can be used in production images, to diff --git a/drivers/led/Kconfig b/drivers/led/Kconfig index bee74b25751..fd9442edaf3 100644 --- a/drivers/led/Kconfig +++ b/drivers/led/Kconfig @@ -9,6 +9,26 @@ config LED can provide access to board-specific LEDs. Use of the device tree for configuration is encouraged.
+config LED_BOOT_ENABLE + bool "Enable LED boot support" + help + Enable LED boot support. + + LED boot is a specific LED assigned to signal boot operation status. + +config LED_BOOT_LABEL + string "LED boot label" + depends on LED_BOOT_ENABLE + help + LED label defined in DT to assign for LED boot usage. + +config LED_BOOT_PERIOD + int "LED boot period" + depends on LED_BOOT_ENABLE && (LED_BLINK || LED_SW_BLINK) + default 2 + help + LED boot blink period in ms. + config LED_BCM6328 bool "LED Support for BCM6328" depends on LED && ARCH_BMIPS diff --git a/include/led.h b/include/led.h index c1f3380f253..2d3b89674e2 100644 --- a/include/led.h +++ b/include/led.h @@ -9,6 +9,7 @@
#include <stdbool.h> #include <cyclic.h> +#include <dm/ofnode.h>
struct udevice;
@@ -159,4 +160,67 @@ 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_ENABLE + +/** + * led_boot_on() - turn ON the designated LED for booting + * + * Return: 0 if OK, -ve on error + */ +static inline int led_boot_on(void) +{ + const char *led_name; + + led_name = ofnode_conf_read_str("u-boot,boot-led"); + if (!led_name) + return -ENOENT; + + return led_set_state_by_label(led_name, LEDST_ON); +} + +/** + * led_boot_off() - turn OFF the designated LED for booting + * + * Return: 0 if OK, -ve on error + */ +static inline int led_boot_off(void) +{ + const char *led_name; + + led_name = ofnode_conf_read_str("u-boot,boot-led"); + if (!led_name) + return -ENOENT; + + return led_set_state_by_label(CONFIG_LED_BOOT_LABEL, LEDST_OFF); +} + +#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 + */ +static inline int led_boot_blink(void) +{ + const char *led_name; + int led_period, ret; + + led_name = ofnode_conf_read_str("u-boot,boot-led"); + if (!led_name) + return -ENOENT; + + led_period = ofnode_conf_read_int("u-boot,boot-led-period", 250); + + ret = led_set_period_by_label(led_name, led_period); + if (ret) + return ret; + + return led_set_state_by_label(led_name, LEDST_BLINK); +} +#else +/* If LED BLINK is not supported/enabled, fallback to LED ON */ +#define led_boot_blink led_boot_on +#endif +#endif + #endif