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author | Rocky Hsiao <rocky.hsiao@dyna-image.com> | 2016-06-24 11:48:27 +0800 |
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committer | chrome-bot <chrome-bot@chromium.org> | 2016-09-13 01:10:47 -0700 |
commit | d8166a8d65bc776ad2484ac49cd4d7a218b48d7c (patch) | |
tree | d09a91e748940678c0373185f53df10fbc3658a5 /driver/als_al3010.h | |
parent | b275061eecb7f9e0aa320bdf039864ab2a25071a (diff) | |
download | chrome-ec-d8166a8d65bc776ad2484ac49cd4d7a218b48d7c.tar.gz |
driver: add support ambient light sensor AL3010stabilize-8798.B
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>
Diffstat (limited to 'driver/als_al3010.h')
-rw-r--r-- | driver/als_al3010.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/driver/als_al3010.h b/driver/als_al3010.h new file mode 100644 index 0000000000..eb06762883 --- /dev/null +++ b/driver/als_al3010.h @@ -0,0 +1,40 @@ +/* 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 (0x1C << 1) +#define AL3010_I2C_ADDR2 (0x1D << 1) +#define AL3010_I2C_ADDR3 (0x1E << 1) + +/* 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 */ |