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1a29ef8e97
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19815 3c298f89-4303-0410-b956-a3cf2f4a3e73
85 lines
2.2 KiB
C
85 lines
2.2 KiB
C
/*
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* arch/ubicom32/include/asm/ubicom32bl.h
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* Ubicom32 architecture backlight driver platform data definitions.
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*
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* (C) Copyright 2009, Ubicom, Inc.
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*
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* This file is part of the Ubicom32 Linux Kernel Port.
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*
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* The Ubicom32 Linux Kernel Port is free software: you can redistribute
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* it and/or modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, either version 2 of the
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* License, or (at your option) any later version.
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*
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* The Ubicom32 Linux Kernel Port is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the Ubicom32 Linux Kernel Port. If not,
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* see <http://www.gnu.org/licenses/>.
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*
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* Ubicom32 implementation derived from (with many thanks):
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* arch/m68knommu
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* arch/blackfin
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* arch/parisc
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*/
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#ifndef _ASM_UBICOM32_UBICOM32_BL_H
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#define _ASM_UBICOM32_UBICOM32_BL_H
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/*
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* Different backlight control mechanisms
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*/
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enum ubicom32bl_pwm_types {
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/*
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* PWM controlled backlight
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*/
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UBICOM32BL_TYPE_PWM,
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/*
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* HRT based PWM backlight
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*/
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UBICOM32BL_TYPE_PWM_HRT,
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/*
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* No dimming, just on or off
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*/
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UBICOM32BL_TYPE_BINARY,
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};
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struct ubicom32bl_platform_data {
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/*
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* Default intensity of the backlight 0-255
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*/
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u8_t default_intensity;
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/*
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* TRUE if the backlight sense is active low. (inverted)
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* FALSE if the backlight sense is active high.
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*/
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bool invert;
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/*
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* Type of the backlight
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*/
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enum ubicom32bl_pwm_types type;
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/*
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* GPIO of the backlight if UBICOM32BL_TYPE_PWM_HRT, UBICOM32BL_TYPE_BINARY
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*/
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unsigned gpio;
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/*
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* PWM channel and parameters of the backlight if UBICOM32BL_TYPE_PWM
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* pre_scaler: sets the rate at which the PWM timer is clocked. (clk_core / 2^pre_scaler)
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* period: sets the period of the timer in timer cycles
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* The duty cycle will be directly proportional to the brightness setting.
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*/
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u32_t pwm_channel;
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u8_t pwm_prescale;
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u16_t pwm_period;
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};
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#endif /* _ASM_UBICOM32_UBICOM32_BL_H */
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