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/* 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
*/
#include "driver/als_al3010.h"
#include "i2c.h"
/**
* Initialise AL3010 light sensor.
*/
int al3010_init(void)
{
int ret;
ret = i2c_write8(I2C_PORT_ALS, AL3010_I2C_ADDR,
AL3010_REG_CONFIG, AL3010_GAIN << 4);
if (ret)
return ret;
return i2c_write8(I2C_PORT_ALS, AL3010_I2C_ADDR,
AL3010_REG_SYSTEM, AL3010_ENABLE);
}
/**
* Read AL3010 light sensor data.
*/
int al3010_read_lux(int *lux, int af)
{
int ret;
int val;
long long val64;
ret = i2c_read16(I2C_PORT_ALS, AL3010_I2C_ADDR,
AL3010_REG_DATA_LOW, &val);
if (ret)
return ret;
val64 = val;
val64 = (val64 * AL3010_GAIN_SCALE) / 10000;
val = val64 * af / 100;
*lux = val;
return EC_SUCCESS;
}
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