66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/*
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* Ambient light sensor driver for Nintendo Switch's Rohm BH1730
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*
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* Copyright (c) 2018 CTCaer
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* 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 this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ALS_H_
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#define __ALS_H_
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#include <utils/types.h>
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#define BH1730_I2C_ADDR 0x29
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#define BH1730_CMD_MAGIC 0x80
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#define BH1730_CMD_SETADDR 0x00
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#define BH1730_CMD_SPECCMD 0x60
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#define BH1730_SPECCMD_RESET 0x4
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#define BH1730_CONTROL_REG 0x00
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#define BH1730_CTL_ADC_VALID 0x10
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#define BH1730_CTL_ONE_TIME 0x08
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#define BH1730_CTL_DAT0_ONLY 0x04
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#define BH1730_CTL_ADC_EN 0x02
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#define BH1730_CTL_POWER_ON 0x01
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#define BH1730_TIMING_REG 0x01
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#define BH1730_GAIN_REG 0x07
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#define BH1730_GAIN_1X 0x00
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#define BH1730_GAIN_2X 0x01
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#define BH1730_GAIN_64X 0x02
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#define BH1730_GAIN_128X 0x03
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#define BH1730_DATA0LOW_REG 0x14
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#define BH1730_DATA0HIGH_REG 0x15
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#define BH1730_DATA1LOW_REG 0x16
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#define BH1730_DATA1HIGH_REG 0x17
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#define BH1730_ADDR(reg) (BH1730_CMD_MAGIC | BH1730_CMD_SETADDR | (reg))
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#define BH1730_SPEC(cmd) (BH1730_CMD_MAGIC | BH1730_CMD_SPECCMD | (cmd))
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typedef struct _als_ctxt_t
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{
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u32 lux;
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bool over_limit;
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u32 vi_light;
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u32 ir_light;
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u8 gain;
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u8 cycle;
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} als_ctxt_t;
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void set_als_cfg(als_ctxt_t *als_ctxt, u8 gain, u8 cycle);
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void get_als_lux(als_ctxt_t *als_ctxt);
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u8 als_power_on(als_ctxt_t *als_ctxt);
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#endif /* __ALS_H_ */
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