62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
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/*
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* TI LP88XX Backlight Core Driver
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*
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* Copyright 2016 Texas Instruments
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*
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* Copyright (c) 2017, NVIDIA CORPORATION, All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __BL_LP88XX_H
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#define __BL_LP88XX_H
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#include <linux/pwm.h>
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#include <drm/drm_fixed.h>
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#define EEPROM_NUM_ADDR 22
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#define LP88XX_NUM_REGIONS 6
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#define LP88XX_NUM_BRT_LEVELS 6
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enum lp88xx_chip_id {
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LP8580,
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LP88XX,
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};
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struct lp88xx_io {
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int (*write)(void *p, u16 reg, u16 val);
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int (*read)(void *p, u16 reg, u16 *val);
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};
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struct eeprom_datum {
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u16 addr;
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u16 val;
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};
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struct lp88xx {
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struct device *dev;
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void *priv;
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struct lp88xx_io io;
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unsigned long region_used; /* Bit mask for LED region map */
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struct pwm_device *pwm;
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unsigned int period;
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u16 max_dev_brt;
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struct eeprom_datum default_eeprom[EEPROM_NUM_ADDR];
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int eeprom_count;
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int led_strings_used; /* Number of LED strings used */
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u32 max_input_brt;
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u16 brt_levels[LP88XX_NUM_BRT_LEVELS]; /* Brightness levels */
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u32 pwm_settle_time_int; /* settle time in pwm clock ticks */
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u32 pwm_flash_time_int; /* flash time in pwm clock tickcs */
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u32 frame_duration_ms;
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enum lp88xx_chip_id chip_id;
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bool eeprom_lock;
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bool nvsr_lock;
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bool low_persistence;
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};
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extern int lp88xx_common_probe(struct device *dev, struct lp88xx *lp);
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#endif
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