1 files changed, 19 insertions, 0 deletions

diff --git a/Documentation/leds/leds-lp5521.txt b/Documentation/leds/leds-lp5521.txt
index f48ab757d120..e3c66c64591d 100644
--- a/Documentation/leds/leds-lp5521.txt
+++ b/Documentation/leds/leds-lp5521.txt
@@ -92,3 +92,22 @@ static struct lp5521_platform_data lp5521_platform_data = {
 
 If the current is set to 0 in the platform data, that channel is
 disabled and it is not visible in the sysfs.
+
+The 'update_config' : CONFIG register (ADDR 08h)
+This value is platform-specific data.
+If update_config is not defined, the CONFIG register is set with
+'LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT'.
+(Enable auto-powersave, set charge pump to auto, red to battery)
+
+example of update_config :
+
+#define LP5521_CONFIGS  (LP5521_PWM_HF | LP5521_PWRSAVE_EN | \
+                        LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT | \
+                        LP5521_CLK_INT)
+
+static struct lp5521_platform_data lp5521_pdata = {
+        .led_config = lp5521_led_config,
+        .num_channels = ARRAY_SIZE(lp5521_led_config),
+        .clock_mode = LP5521_CLOCK_INT,
+        .update_config = LP5521_CONFIGS,
+};