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backlight: new driver for the ADP8870 backlight devices

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Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Michael Hennerich 2011-06-15 15:08:11 -07:00 committed by Linus Torvalds
parent 7f81c8890c
commit a59ec1e7ff
5 changed files with 1233 additions and 0 deletions
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56
Documentation/ABI/testing/sysfs-class-backlight-driver-adp8870 Normal file
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@ -0,0 +1,56 @@
What: /sys/class/backlight/<backlight>/<ambient light zone>_max
What: /sys/class/backlight/<backlight>/l1_daylight_max
What: /sys/class/backlight/<backlight>/l2_bright_max
What: /sys/class/backlight/<backlight>/l3_office_max
What: /sys/class/backlight/<backlight>/l4_indoor_max
What: /sys/class/backlight/<backlight>/l5_dark_max
Date: Mai 2011
KernelVersion: 2.6.40
Contact: device-drivers-devel@blackfin.uclinux.org
Description:
Control the maximum brightness for <ambient light zone>
on this <backlight>. Values are between 0 and 127. This file
will also show the brightness level stored for this
<ambient light zone>.
What: /sys/class/backlight/<backlight>/<ambient light zone>_dim
What: /sys/class/backlight/<backlight>/l2_bright_dim
What: /sys/class/backlight/<backlight>/l3_office_dim
What: /sys/class/backlight/<backlight>/l4_indoor_dim
What: /sys/class/backlight/<backlight>/l5_dark_dim
Date: Mai 2011
KernelVersion: 2.6.40
Contact: device-drivers-devel@blackfin.uclinux.org
Description:
Control the dim brightness for <ambient light zone>
on this <backlight>. Values are between 0 and 127, typically
set to 0. Full off when the backlight is disabled.
This file will also show the dim brightness level stored for
this <ambient light zone>.
What: /sys/class/backlight/<backlight>/ambient_light_level
Date: Mai 2011
KernelVersion: 2.6.40
Contact: device-drivers-devel@blackfin.uclinux.org
Description:
Get conversion value of the light sensor.
This value is updated every 80 ms (when the light sensor
is enabled). Returns integer between 0 (dark) and
8000 (max ambient brightness)
What: /sys/class/backlight/<backlight>/ambient_light_zone
Date: Mai 2011
KernelVersion: 2.6.40
Contact: device-drivers-devel@blackfin.uclinux.org
Description:
Get/Set current ambient light zone. Reading returns
integer between 1..5 (1 = daylight, 2 = bright, ..., 5 = dark).
Writing a value between 1..5 forces the backlight controller
to enter the corresponding ambient light zone.
Writing 0 returns to normal/automatic ambient light level
operation. The ambient light sensing feature on these devices
is an extension to the API documented in
Documentation/ABI/stable/sysfs-class-backlight.
It can be enabled by writing the value stored in
/sys/class/backlight/<backlight>/max_brightness to
/sys/class/backlight/<backlight>/brightness.

12
drivers/video/backlight/Kconfig
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@ -302,6 +302,18 @@ config BACKLIGHT_ADP8860
To compile this driver as a module, choose M here: the module will
be called adp8860_bl.
config BACKLIGHT_ADP8870
tristate "Backlight Driver for ADP8870 using WLED"
depends on BACKLIGHT_CLASS_DEVICE && I2C
select NEW_LEDS
select LEDS_CLASS
help
If you have a LCD backlight connected to the ADP8870,
say Y here to enable this driver.
To compile this driver as a module, choose M here: the module will
be called adp8870_bl.
config BACKLIGHT_88PM860X
tristate "Backlight Driver for 88PM8606 using WLED"
depends on MFD_88PM860X

1
drivers/video/backlight/Makefile
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@ -34,6 +34,7 @@ obj-$(CONFIG_BACKLIGHT_WM831X) += wm831x_bl.o
obj-$(CONFIG_BACKLIGHT_ADX) += adx_bl.o
obj-$(CONFIG_BACKLIGHT_ADP5520) += adp5520_bl.o
obj-$(CONFIG_BACKLIGHT_ADP8860) += adp8860_bl.o
obj-$(CONFIG_BACKLIGHT_ADP8870) += adp8870_bl.o
obj-$(CONFIG_BACKLIGHT_88PM860X) += 88pm860x_bl.o
obj-$(CONFIG_BACKLIGHT_PCF50633) += pcf50633-backlight.o

1011
drivers/video/backlight/adp8870_bl.c Normal file
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153
include/linux/i2c/adp8870.h Normal file
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/*
* Definitions and platform data for Analog Devices
* Backlight drivers ADP8870
*
* Copyright 2009-2010 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#ifndef __LINUX_I2C_ADP8870_H
#define __LINUX_I2C_ADP8870_H
#define ID_ADP8870 8870
#define ADP8870_MAX_BRIGHTNESS 0x7F
#define FLAG_OFFT_SHIFT 8
/*
* LEDs subdevice platform data
*/
#define ADP8870_LED_DIS_BLINK (0 << FLAG_OFFT_SHIFT)
#define ADP8870_LED_OFFT_600ms (1 << FLAG_OFFT_SHIFT)
#define ADP8870_LED_OFFT_1200ms (2 << FLAG_OFFT_SHIFT)
#define ADP8870_LED_OFFT_1800ms (3 << FLAG_OFFT_SHIFT)
#define ADP8870_LED_ONT_200ms 0
#define ADP8870_LED_ONT_600ms 1
#define ADP8870_LED_ONT_800ms 2
#define ADP8870_LED_ONT_1200ms 3
#define ADP8870_LED_D7 (7)
#define ADP8870_LED_D6 (6)
#define ADP8870_LED_D5 (5)
#define ADP8870_LED_D4 (4)
#define ADP8870_LED_D3 (3)
#define ADP8870_LED_D2 (2)
#define ADP8870_LED_D1 (1)
/*
* Backlight subdevice platform data
*/
#define ADP8870_BL_D7 (1 << 6)
#define ADP8870_BL_D6 (1 << 5)
#define ADP8870_BL_D5 (1 << 4)
#define ADP8870_BL_D4 (1 << 3)
#define ADP8870_BL_D3 (1 << 2)
#define ADP8870_BL_D2 (1 << 1)
#define ADP8870_BL_D1 (1 << 0)
#define ADP8870_FADE_T_DIS 0 /* Fade Timer Disabled */
#define ADP8870_FADE_T_300ms 1 /* 0.3 Sec */
#define ADP8870_FADE_T_600ms 2
#define ADP8870_FADE_T_900ms 3
#define ADP8870_FADE_T_1200ms 4
#define ADP8870_FADE_T_1500ms 5
#define ADP8870_FADE_T_1800ms 6
#define ADP8870_FADE_T_2100ms 7
#define ADP8870_FADE_T_2400ms 8
#define ADP8870_FADE_T_2700ms 9
#define ADP8870_FADE_T_3000ms 10
#define ADP8870_FADE_T_3500ms 11
#define ADP8870_FADE_T_4000ms 12
#define ADP8870_FADE_T_4500ms 13
#define ADP8870_FADE_T_5000ms 14
#define ADP8870_FADE_T_5500ms 15 /* 5.5 Sec */
#define ADP8870_FADE_LAW_LINEAR 0
#define ADP8870_FADE_LAW_SQUARE 1
#define ADP8870_FADE_LAW_CUBIC1 2
#define ADP8870_FADE_LAW_CUBIC2 3
#define ADP8870_BL_AMBL_FILT_80ms 0 /* Light sensor filter time */
#define ADP8870_BL_AMBL_FILT_160ms 1
#define ADP8870_BL_AMBL_FILT_320ms 2
#define ADP8870_BL_AMBL_FILT_640ms 3
#define ADP8870_BL_AMBL_FILT_1280ms 4
#define ADP8870_BL_AMBL_FILT_2560ms 5
#define ADP8870_BL_AMBL_FILT_5120ms 6
#define ADP8870_BL_AMBL_FILT_10240ms 7 /* 10.24 sec */
/*
* Blacklight current 0..30mA
*/
#define ADP8870_BL_CUR_mA(I) ((I * 127) / 30)
/*
* L2 comparator current 0..1106uA
*/
#define ADP8870_L2_COMP_CURR_uA(I) ((I * 255) / 1106)
/*
* L3 comparator current 0..551uA
*/
#define ADP8870_L3_COMP_CURR_uA(I) ((I * 255) / 551)
/*
* L4 comparator current 0..275uA
*/
#define ADP8870_L4_COMP_CURR_uA(I) ((I * 255) / 275)
/*
* L5 comparator current 0..138uA
*/
#define ADP8870_L5_COMP_CURR_uA(I) ((I * 255) / 138)
struct adp8870_backlight_platform_data {
u8 bl_led_assign; /* 1 = Backlight 0 = Individual LED */
u8 pwm_assign; /* 1 = Enables PWM mode */
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_bright_max; /* use BL_CUR_mA(I) 0 <= I <= 30 mA */
u8 l2_bright_dim; /* typ = 0, use BL_CUR_mA(I) 0 <= I <= 30 mA */
u8 l3_office_max; /* use BL_CUR_mA(I) 0 <= I <= 30 mA */
u8 l3_office_dim; /* typ = 0, use BL_CUR_mA(I) 0 <= I <= 30 mA */
u8 l4_indoor_max; /* use BL_CUR_mA(I) 0 <= I <= 30 mA */
u8 l4_indor_dim; /* typ = 0, use BL_CUR_mA(I) 0 <= I <= 30 mA */
u8 l5_dark_max; /* use BL_CUR_mA(I) 0 <= I <= 30 mA */
u8 l5_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 */
u8 l4_trip; /* use L4_COMP_CURR_uA(I) 0 <= I <= 275 uA */
u8 l4_hyst; /* use L4_COMP_CURR_uA(I) 0 <= I <= 275 uA */
u8 l5_trip; /* use L5_COMP_CURR_uA(I) 0 <= I <= 138 uA */
u8 l5_hyst; /* use L6_COMP_CURR_uA(I) 0 <= I <= 138 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_ADP8870_H */