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Commit a59ec1e7 authored by Michael Hennerich's avatar Michael Hennerich Committed by Linus Torvalds
Browse files

backlight: new driver for the ADP8870 backlight devices 



Signed-off-by: default avatarMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: default avatarMike Frysinger <vapier@gentoo.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 7f81c889

Documentation/ABI/testing/sysfs-class-backlight-driver-adp8870

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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.
 
 No newline at end of file

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

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

drivers/video/backlight/adp8870_bl.c

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File added.

Preview size limit exceeded, changes collapsed.

include/linux/i2c/adp8870.h

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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 */