[PATCH v2 5/9] led: implement LED activity API

[Christian Marangi <ansuelsmth@gmail.com>]

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 are implemented similar to BOOT LED, LED_ACTIVITY_ENABLE to
enable support for it, LED_ACTIVITY_LABEL to assign the LED in DT for
activity usage and LED_ACTIVITY_PERIOD to set the blinking period.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 drivers/led/Kconfig | 21 +++++++++++++++++++++
 include/led.h       | 44 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+)

diff --git a/drivers/led/Kconfig b/drivers/led/Kconfig
index fd9442edaf3..1336f943dab 100644
--- a/drivers/led/Kconfig
+++ b/drivers/led/Kconfig
@@ -29,6 +29,27 @@ config LED_BOOT_PERIOD
 	help
 	  LED boot blink period in ms.
 
+config LED_ACTIVITY_ENABLE
+	bool "Enable LED activity support"
+	help
+	  Enable LED activity support.
+
+	  LED activity is a specific LED assigned to signal activity operation
+	  like file trasnfer, flash write/erase...
+
+config LED_ACTIVITY_LABEL
+	string "LED activity label"
+	depends on LED_ACTIVITY_ENABLE
+	help
+	  LED label defined in DT to assign for LED activity usage.
+
+config LED_ACTIVITY_PERIOD
+	int "LED activity period"
+	depends on LED_ACTIVITY_ENABLE && (LED_BLINK || LED_SW_BLINK)
+	default 2
+	help
+	  LED activity 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 7bbe165d838..61ece70a975 100644
--- a/include/led.h
+++ b/include/led.h
@@ -203,4 +203,48 @@ static inline int led_boot_blink(void)
 #endif
 #endif
 
+#ifdef CONFIG_LED_ACTIVITY_ENABLE
+
+/**
+ * led_activity_on() - turn ON the designated LED for activity
+ *
+ * Return: 0 if OK, -ve on error
+ */
+static inline int led_activity_on(void)
+{
+	return led_set_state_by_label(CONFIG_LED_ACTIVITY_LABEL, LEDST_ON);
+}
+
+/**
+ * led_activity_off() - turn OFF the designated LED for activity
+ *
+ * Return: 0 if OK, -ve on error
+ */
+static inline int led_activity_off(void)
+{
+	return led_set_state_by_label(CONFIG_LED_ACTIVITY_LABEL, LEDST_OFF);
+}
+
+#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
+ */
+static inline int led_activity_blink(void)
+{
+	int ret;
+
+	ret = led_set_period_by_label(CONFIG_LED_ACTIVITY_LABEL, CONFIG_LED_BOOT_PERIOD);
+	if (ret)
+		return ret;
+
+	return led_set_state_by_label(CONFIG_LED_ACTIVITY_LABEL, LEDST_BLINK);
+}
+#else
+/* If LED BLINK is not supported/enabled, fallback to LED ON */
+#define led_activity_blink led_activity_on
+#endif
+#endif
+
 #endif
-- 
2.45.2