diff --git a/include/linux/platform_data/lp855x.h b/include/linux/platform_data/lp855x.h
index e81f62d..20ee8b2 100644
--- a/include/linux/platform_data/lp855x.h
+++ b/include/linux/platform_data/lp855x.h
@@ -49,12 +49,24 @@
 #define LP8556_FAST_CONFIG	BIT(7) /* use it if EPROMs should be maintained
 					  when exiting the low power mode */
 
+/* CONFIG register - LP8557 */
+#define LP8557_PWM_STANDBY	BIT(7)
+#define LP8557_PWM_FILTER	BIT(6)
+#define LP8557_RELOAD_EPROM	BIT(3)	/* use it if EPROMs should be reset
+					   when the backlight turns on */
+#define LP8557_OFF_OPENLEDS	BIT(2)
+#define LP8557_PWM_CONFIG	LP8557_PWM_ONLY
+#define LP8557_I2C_CONFIG	LP8557_I2C_ONLY
+#define LP8557_COMB1_CONFIG	LP8557_COMBINED1
+#define LP8557_COMB2_CONFIG	LP8557_COMBINED2
+
 enum lp855x_chip_id {
 	LP8550,
 	LP8551,
 	LP8552,
 	LP8553,
 	LP8556,
+	LP8557,
 };
 
 enum lp855x_brightness_ctrl_mode {
@@ -89,6 +101,13 @@
 	LP8556_COMBINED2,	/* pwm + i2c after the shaper block */
 };
 
+enum lp8557_brightness_source {
+	LP8557_PWM_ONLY,
+	LP8557_I2C_ONLY,
+	LP8557_COMBINED1,	/* pwm + i2c after the shaper block */
+	LP8557_COMBINED2,	/* pwm + i2c before the shaper block */
+};
+
 struct lp855x_rom_data {
 	u8 addr;
 	u8 val;