leds: lp55xx: add common data structure for program

LP55xx family devices have internal three program engines which are used for
loading LED patterns. To maintain legacy device attributes, specific data
structure is used, 'mode' and 'led_mux'. The mode is used for showing/storing
current engine mode such like disabled, load and run. Then led_mux is used for
showing/storing current output LED selection.

This is only for LP5523/55231.

Signed-off-by: Milo Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>

drivers/leds/leds-lp55xx-common.h

@@ -20,6 +20,13 @@ enum lp55xx_engine_index {
 	LP55XX_ENGINE_1,
 	LP55XX_ENGINE_2,
 	LP55XX_ENGINE_3,
+	LP55XX_ENGINE_MAX = LP55XX_ENGINE_3,
+};
+
+enum lp55xx_engine_mode {
+	LP55XX_ENGINE_DISABLED,
+	LP55XX_ENGINE_LOAD,
+	LP55XX_ENGINE_RUN,
 };
 
 struct lp55xx_led;
@@ -71,6 +78,16 @@ struct lp55xx_device_config {
 	const struct attribute_group *dev_attr_group;
 };
 
+/*
+ * struct lp55xx_engine
+ * @mode       : Engine mode
+ * @led_mux    : Mux bits for LED selection. Only used in LP5523
+ */
+struct lp55xx_engine {
+	enum lp55xx_engine_mode mode;
+	u16 led_mux;
+};
+
 /*
  * struct lp55xx_chip
  * @cl         : I2C communication for access registers
@@ -79,6 +96,7 @@ struct lp55xx_device_config {
  * @num_leds   : Number of registered LEDs
  * @cfg        : Device specific configuration data
  * @engine_idx : Selected engine number
+ * @engines    : Engine structure for the device attribute R/W interface
  * @fw         : Firmware data for running a LED pattern
  */
 struct lp55xx_chip {
@@ -89,6 +107,7 @@ struct lp55xx_chip {
 	int num_leds;
 	struct lp55xx_device_config *cfg;
 	enum lp55xx_engine_index engine_idx;
+	struct lp55xx_engine engines[LP55XX_ENGINE_MAX];
 	const struct firmware *fw;
 };