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