41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
|
/* Copyright 2015 The Chromium OS Authors. All rights reserved.
|
||
|
|
* Use of this source code is governed by a BSD-style license that can be
|
||
|
|
* found in the LICENSE file.
|
||
|
|
*
|
||
|
|
* Dyna-Image AL3010 light sensor driver
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __CROS_EC_ALS_AL3010_H
|
||
|
|
#define __CROS_EC_ALS_AL3010_H
|
||
|
|
|
||
|
|
/* I2C interface */
|
||
|
|
#define AL3010_I2C_ADDR1_FLAGS 0x1C
|
||
|
|
#define AL3010_I2C_ADDR2_FLAGS 0x1D
|
||
|
|
#define AL3010_I2C_ADDR3_FLAGS 0x1E
|
||
|
|
|
||
|
|
/* AL3010 registers */
|
||
|
|
#define AL3010_REG_SYSTEM 0x00
|
||
|
|
#define AL3010_REG_INT_STATUS 0x01
|
||
|
|
#define AL3010_REG_CONFIG 0x10
|
||
|
|
#define AL3010_REG_DATA_LOW 0x0C
|
||
|
|
|
||
|
|
#define AL3010_ENABLE 0x01
|
||
|
|
#define AL3010_GAIN_SELECT 3
|
||
|
|
|
||
|
|
#define AL3010_GAIN_1 0 /* 77806 lx */
|
||
|
|
#define AL3010_GAIN_2 1 /* 19452 lx */
|
||
|
|
#define AL3010_GAIN_3 2 /* 4863 lx */
|
||
|
|
#define AL3010_GAIN_4 3 /* 1216 lx */
|
||
|
|
#define AL3010_GAIN CONCAT2(AL3010_GAIN_, AL3010_GAIN_SELECT)
|
||
|
|
|
||
|
|
#define AL3010_GAIN_SCALE_1 11872 /* 1.1872 lux/count */
|
||
|
|
#define AL3010_GAIN_SCALE_2 2968 /* 0.2968 lux/count */
|
||
|
|
#define AL3010_GAIN_SCALE_3 742 /* 0.0742 lux/count */
|
||
|
|
#define AL3010_GAIN_SCALE_4 186 /* 0.0186 lux/count */
|
||
|
|
#define AL3010_GAIN_SCALE CONCAT2(AL3010_GAIN_SCALE_, AL3010_GAIN_SELECT)
|
||
|
|
|
||
|
|
int al3010_init(void);
|
||
|
|
int al3010_read_lux(int *lux, int af);
|
||
|
|
|
||
|
|
#endif /* __CROS_EC_ALS_AL3010_H */
|