led: implement LED activity API

Implement LED activity API similar to BOOT LED API.

Usual activity might be a file transfer with TFTP, a flash write...

User of this API will call led_activity_on/off/blink() to signal these
kind of activity.

New Kconfig is implemented similar to BOOT LED, LED_ACTIVITY to
enable support for it.

It's introduced a new /options/u-boot property "activity-led" and
"activity-led-period" to define the activity LED label and the
default period when the activity LED is set to blink mode.

If "activity-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 <[email protected]>
Reviewed-by: Simon Glass <[email protected]>

1 files changed, 51 insertions, 0 deletions

diff --git a/include/led.h b/include/led.h
index 49ec2998a33..19d92d6441a 100644
--- a/include/led.h
+++ b/include/led.h
@@ -54,14 +54,21 @@ struct led_uc_plat {
  * struct led_uc_priv - Private data the uclass stores about each device
  *
  * @boot_led_label:	Boot LED label
+ * @activity_led_label:	Activity LED label
  * @boot_led_dev:	Boot LED dev
+ * @activity_led_dev:	Activity LED dev
  * @boot_led_period:	Boot LED blink period
+ * @activity_led_period: Activity LED blink period
  */
 struct led_uc_priv {
 #ifdef CONFIG_LED_BOOT
 	const char *boot_led_label;
 	int boot_led_period;
 #endif
+#ifdef CONFIG_LED_ACTIVITY
+	const char *activity_led_label;
+	int activity_led_period;
+#endif
 };
 
 struct led_ops {
@@ -192,4 +199,48 @@ static inline int led_boot_blink(void)
 }
 #endif
 
+#ifdef CONFIG_LED_ACTIVITY
+
+/**
+ * led_activity_on() - turn ON the designated LED for activity
+ *
+ * Return: 0 if OK, -ve on error
+ */
+int led_activity_on(void);
+
+/**
+ * led_activity_off() - turn OFF the designated LED for activity
+ *
+ * Return: 0 if OK, -ve on error
+ */
+int led_activity_off(void);
+
+#if defined(CONFIG_LED_BLINK) || defined(CONFIG_LED_SW_BLINK)
+/**
+ * led_activity_blink() - turn ON the designated LED for activity
+ *
+ * Return: 0 if OK, -ve on error
+ */
+int led_activity_blink(void);
+#else
+/* If LED BLINK is not supported/enabled, fallback to LED ON */
+#define led_activity_blink led_activity_on
+#endif
+#else
+static inline int led_activity_on(void)
+{
+	return -ENOSYS;
+}
+
+static inline int led_activity_off(void)
+{
+	return -ENOSYS;
+}
+
+static inline int led_activity_blink(void)
+{
+	return -ENOSYS;
+}
+#endif
+
 #endif