backlight: new driver for the ADP8860 backlight parts

The ADP8860 combines a programmable backlight LED charge pump driver with
automatic phototransistor control.

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

1 files changed, 137 insertions, 0 deletions

diff --git a/include/linux/i2c/adp8860.h b/include/linux/i2c/adp8860.h
new file mode 100644
index 000000000000..115514b7176e
--- /dev/null
+++ b/include/linux/i2c/adp8860.h
@@ -0,0 +1,137 @@
+/*
+ * Definitions and platform data for Analog Devices
+ * Backlight drivers ADP8860
+ *
+ * Copyright 2009-2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __LINUX_I2C_ADP8860_H
+#define __LINUX_I2C_ADP8860_H
+
+#include <linux/leds.h>
+#include <linux/types.h>
+
+#define ID_ADP8860              8860
+
+#define ADP8860_MAX_BRIGHTNESS  0x7F
+#define FLAG_OFFT_SHIFT 8
+
+/*
+ * LEDs subdevice platform data
+ */
+
+#define ADP8860_LED_DIS_BLINK   (0 << FLAG_OFFT_SHIFT)
+#define ADP8860_LED_OFFT_600ms  (1 << FLAG_OFFT_SHIFT)
+#define ADP8860_LED_OFFT_1200ms (2 << FLAG_OFFT_SHIFT)
+#define ADP8860_LED_OFFT_1800ms (3 << FLAG_OFFT_SHIFT)
+
+#define ADP8860_LED_ONT_200ms   0
+#define ADP8860_LED_ONT_600ms   1
+#define ADP8860_LED_ONT_800ms   2
+#define ADP8860_LED_ONT_1200ms  3
+
+#define ADP8860_LED_D7          (7)
+#define ADP8860_LED_D6          (6)
+#define ADP8860_LED_D5          (5)
+#define ADP8860_LED_D4          (4)
+#define ADP8860_LED_D3          (3)
+#define ADP8860_LED_D2          (2)
+#define ADP8860_LED_D1          (1)
+
+/*
+ * Backlight subdevice platform data
+ */
+
+#define ADP8860_BL_D7           (1 << 6)
+#define ADP8860_BL_D6           (1 << 5)
+#define ADP8860_BL_D5           (1 << 4)
+#define ADP8860_BL_D4           (1 << 3)
+#define ADP8860_BL_D3           (1 << 2)
+#define ADP8860_BL_D2           (1 << 1)
+#define ADP8860_BL_D1           (1 << 0)
+
+#define ADP8860_FADE_T_DIS      0       /* Fade Timer Disabled */
+#define ADP8860_FADE_T_300ms    1       /* 0.3 Sec */
+#define ADP8860_FADE_T_600ms    2
+#define ADP8860_FADE_T_900ms    3
+#define ADP8860_FADE_T_1200ms   4
+#define ADP8860_FADE_T_1500ms   5
+#define ADP8860_FADE_T_1800ms   6
+#define ADP8860_FADE_T_2100ms   7
+#define ADP8860_FADE_T_2400ms   8
+#define ADP8860_FADE_T_2700ms   9
+#define ADP8860_FADE_T_3000ms   10
+#define ADP8860_FADE_T_3500ms   11
+#define ADP8860_FADE_T_4000ms   12
+#define ADP8860_FADE_T_4500ms   13
+#define ADP8860_FADE_T_5000ms   14
+#define ADP8860_FADE_T_5500ms   15      /* 5.5 Sec */
+
+#define ADP8860_FADE_LAW_LINEAR 0
+#define ADP8860_FADE_LAW_SQUARE 1
+#define ADP8860_FADE_LAW_CUBIC1 2
+#define ADP8860_FADE_LAW_CUBIC2 3
+
+#define ADP8860_BL_AMBL_FILT_80ms       0       /* Light sensor filter time */
+#define ADP8860_BL_AMBL_FILT_160ms      1
+#define ADP8860_BL_AMBL_FILT_320ms      2
+#define ADP8860_BL_AMBL_FILT_640ms      3
+#define ADP8860_BL_AMBL_FILT_1280ms     4
+#define ADP8860_BL_AMBL_FILT_2560ms     5
+#define ADP8860_BL_AMBL_FILT_5120ms     6
+#define ADP8860_BL_AMBL_FILT_10240ms    7       /* 10.24 sec */
+
+/*
+ * Blacklight current 0..30mA
+ */
+#define ADP8860_BL_CUR_mA(I)            ((I * 127) / 30)
+
+/*
+ * L2 comparator current 0..1106uA
+ */
+#define ADP8860_L2_COMP_CURR_uA(I)      ((I * 255) / 1106)
+
+/*
+ * L3 comparator current 0..138uA
+ */
+#define ADP8860_L3_COMP_CURR_uA(I)      ((I * 255) / 138)
+
+struct adp8860_backlight_platform_data {
+        u8 bl_led_assign;       /* 1 = Backlight 0 = Individual LED */
+
+        u8 bl_fade_in;          /* Backlight Fade-In Timer */
+        u8 bl_fade_out;         /* Backlight Fade-Out Timer */
+        u8 bl_fade_law;         /* fade-on/fade-off transfer characteristic */
+
+        u8 en_ambl_sens;        /* 1 = enable ambient light sensor */
+        u8 abml_filt;           /* Light sensor filter time */
+
+        u8 l1_daylight_max;     /* use BL_CUR_mA(I) 0 <= I <= 30 mA */
+        u8 l1_daylight_dim;     /* typ = 0, use BL_CUR_mA(I) 0 <= I <= 30 mA */
+        u8 l2_office_max;       /* use BL_CUR_mA(I) 0 <= I <= 30 mA */
+        u8 l2_office_dim;       /* typ = 0, use BL_CUR_mA(I) 0 <= I <= 30 mA */
+        u8 l3_dark_max;         /* use BL_CUR_mA(I) 0 <= I <= 30 mA */
+        u8 l3_dark_dim;         /* typ = 0, use BL_CUR_mA(I) 0 <= I <= 30 mA */
+
+        u8 l2_trip;             /* use L2_COMP_CURR_uA(I) 0 <= I <= 1106 uA */
+        u8 l2_hyst;             /* use L2_COMP_CURR_uA(I) 0 <= I <= 1106 uA */
+        u8 l3_trip;             /* use L3_COMP_CURR_uA(I) 0 <= I <= 551 uA */
+        u8 l3_hyst;             /* use L3_COMP_CURR_uA(I) 0 <= I <= 551 uA */
+
+        /**
+         * Independent Current Sinks / LEDS
+         * Sinks not assigned to the Backlight can be exposed to
+         * user space using the LEDS CLASS interface
+         */
+
+        int num_leds;
+        struct led_info *leds;
+        u8 led_fade_in;         /* LED Fade-In Timer */
+        u8 led_fade_out;        /* LED Fade-Out Timer */
+        u8 led_fade_law;        /* fade-on/fade-off transfer characteristic */
+        u8 led_on_time;
+};
+
+#endif /* __LINUX_I2C_ADP8860_H */