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AL3010 is Dyna-Image ambient light sensor. Here is add basic driver and functions. BUG=chrome-os-partner:52915 BRANCH=elm TEST=Flash on base board "glados" with ASUS al3010_init is return success. al3010_read_lux is return the lux success. Change-Id: Ie3b97d0889b150c43d19bc84d84f04c13e415c31 Signed-off-by: Rocky Hsiao <rocky.hsiao@dyna-image.com> Reviewed-on: https://chromium-review.googlesource.com/356874 Reviewed-by: Gwendal Grignou <gwendal@chromium.org> Reviewed-by: Thomas Lin <thomas.lin@dyna-image.com>
41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
/* Copyright 2015 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Dyna-Image AL3010 light sensor driver
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*/
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#ifndef __CROS_EC_ALS_AL3010_H
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#define __CROS_EC_ALS_AL3010_H
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/* I2C interface */
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#define AL3010_I2C_ADDR1 (0x1C << 1)
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#define AL3010_I2C_ADDR2 (0x1D << 1)
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#define AL3010_I2C_ADDR3 (0x1E << 1)
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/* AL3010 registers */
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#define AL3010_REG_SYSTEM 0x00
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#define AL3010_REG_INT_STATUS 0x01
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#define AL3010_REG_CONFIG 0x10
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#define AL3010_REG_DATA_LOW 0x0C
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#define AL3010_ENABLE 0x01
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#define AL3010_GAIN_SELECT 3
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#define AL3010_GAIN_1 0 /* 77806 lx */
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#define AL3010_GAIN_2 1 /* 19452 lx */
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#define AL3010_GAIN_3 2 /* 4863 lx */
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#define AL3010_GAIN_4 3 /* 1216 lx */
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#define AL3010_GAIN CONCAT2(AL3010_GAIN_, AL3010_GAIN_SELECT)
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#define AL3010_GAIN_SCALE_1 11872 /* 1.1872 lux/count */
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#define AL3010_GAIN_SCALE_2 2968 /* 0.2968 lux/count */
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#define AL3010_GAIN_SCALE_3 742 /* 0.0742 lux/count */
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#define AL3010_GAIN_SCALE_4 186 /* 0.0186 lux/count */
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#define AL3010_GAIN_SCALE CONCAT2(AL3010_GAIN_SCALE_, AL3010_GAIN_SELECT)
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int al3010_init(void);
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int al3010_read_lux(int *lux, int af);
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#endif /* __CROS_EC_ALS_AL3010_H */
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