| 1 | /* |
| 2 | * arch/ubicom32/include/asm/ubicom32bl.h |
| 3 | * Ubicom32 architecture backlight driver platform data definitions. |
| 4 | * |
| 5 | * (C) Copyright 2009, Ubicom, Inc. |
| 6 | * |
| 7 | * This file is part of the Ubicom32 Linux Kernel Port. |
| 8 | * |
| 9 | * The Ubicom32 Linux Kernel Port is free software: you can redistribute |
| 10 | * it and/or modify it under the terms of the GNU General Public License |
| 11 | * as published by the Free Software Foundation, either version 2 of the |
| 12 | * License, or (at your option) any later version. |
| 13 | * |
| 14 | * The Ubicom32 Linux Kernel Port is distributed in the hope that it |
| 15 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied |
| 16 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 17 | * the GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with the Ubicom32 Linux Kernel Port. If not, |
| 21 | * see <http://www.gnu.org/licenses/>. |
| 22 | * |
| 23 | * Ubicom32 implementation derived from (with many thanks): |
| 24 | * arch/m68knommu |
| 25 | * arch/blackfin |
| 26 | * arch/parisc |
| 27 | */ |
| 28 | #ifndef _ASM_UBICOM32_UBICOM32_BL_H |
| 29 | #define _ASM_UBICOM32_UBICOM32_BL_H |
| 30 | |
| 31 | /* |
| 32 | * Different backlight control mechanisms |
| 33 | */ |
| 34 | enum ubicom32bl_pwm_types { |
| 35 | /* |
| 36 | * PWM controlled backlight |
| 37 | */ |
| 38 | UBICOM32BL_TYPE_PWM, |
| 39 | |
| 40 | /* |
| 41 | * HRT based PWM backlight |
| 42 | */ |
| 43 | UBICOM32BL_TYPE_PWM_HRT, |
| 44 | |
| 45 | /* |
| 46 | * No dimming, just on or off |
| 47 | */ |
| 48 | UBICOM32BL_TYPE_BINARY, |
| 49 | }; |
| 50 | |
| 51 | struct ubicom32bl_platform_data { |
| 52 | /* |
| 53 | * Default intensity of the backlight 0-255 |
| 54 | */ |
| 55 | u8_t default_intensity; |
| 56 | |
| 57 | /* |
| 58 | * TRUE if the backlight sense is active low. (inverted) |
| 59 | * FALSE if the backlight sense is active high. |
| 60 | */ |
| 61 | bool invert; |
| 62 | |
| 63 | /* |
| 64 | * Type of the backlight |
| 65 | */ |
| 66 | enum ubicom32bl_pwm_types type; |
| 67 | |
| 68 | /* |
| 69 | * GPIO of the backlight if UBICOM32BL_TYPE_PWM_HRT, UBICOM32BL_TYPE_BINARY |
| 70 | */ |
| 71 | unsigned gpio; |
| 72 | |
| 73 | /* |
| 74 | * PWM channel and parameters of the backlight if UBICOM32BL_TYPE_PWM |
| 75 | * pre_scaler: sets the rate at which the PWM timer is clocked. (clk_core / 2^pre_scaler) |
| 76 | * period: sets the period of the timer in timer cycles |
| 77 | * The duty cycle will be directly proportional to the brightness setting. |
| 78 | */ |
| 79 | u32_t pwm_channel; |
| 80 | u8_t pwm_prescale; |
| 81 | u16_t pwm_period; |
| 82 | }; |
| 83 | |
| 84 | #endif /* _ASM_UBICOM32_UBICOM32_BL_H */ |
| 85 | |
