backlight: adp8860: add support for ADP8861 & ADP8863

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/include/linux/i2c/adp8860.h b/include/linux/i2c/adp8860.h
index 115514b7176..0b4d39855c9 100644
--- a/include/linux/i2c/adp8860.h
+++ b/include/linux/i2c/adp8860.h
@@ -132,6 +132,23 @@ struct adp8860_backlight_platform_data {
         u8 led_fade_out;        /* LED Fade-Out Timer */
         u8 led_fade_law;        /* fade-on/fade-off transfer characteristic */
         u8 led_on_time;
+
+        /**
+         * Gain down disable. Setting this option does not allow the
+         * charge pump to switch to lower gains. NOT AVAILABLE on ADP8860
+         * 1 = the charge pump doesn't switch down in gain until all LEDs are 0.
+         *  The charge pump switches up in gain as needed. This feature is
+         *  useful if the ADP8863 charge pump is used to drive an external load.
+         *  This feature must be used when utilizing small fly capacitors
+         *  (0402 or smaller).
+         * 0 = the charge pump automatically switches up and down in gain.
+         *  This provides optimal efficiency, but is not suitable for driving
+         *  loads that are not connected through the ADP8863 diode drivers.
+         *  Additionally, the charge pump fly capacitors should be low ESR
+         * and sized 0603 or greater.
+         */
+
+        u8 gdwn_dis;
 };
 
 #endif /* __LINUX_I2C_ADP8860_H */