diff options
author | YB.Ha <ybha@samsung.com> | 2017-11-24 18:30:40 +0900 |
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committer | chrome-bot <chrome-bot@chromium.org> | 2017-12-08 00:37:03 -0800 |
commit | 47a6acca3a41f21f8fe08e5ecb7b4d23acb6eb00 (patch) | |
tree | 3ba213fc0f9fef8b324543913122420487cf32b4 /driver/als_bh1730.h | |
parent | aa63578a25e2cc8b321d8f4868414b9628ec027a (diff) | |
download | chrome-ec-47a6acca3a41f21f8fe08e5ecb7b4d23acb6eb00.tar.gz |
motion: Add bh1730 as a motion sensor
- Add ROHM ambient light sensor driver
- Add als sensor to motion sensors
BRANCH=glados
BUG=b:67022366
TEST=This driver is tested in caroline
Signed-off-by: yb.ha <ybha@samsung.com>
Change-Id: Ic73c50e17b412975f7850b7348ce310180f7a6eb
Reviewed-on: https://chromium-review.googlesource.com/784659
Commit-Ready: YongBeum Ha <ybha@samsung.com>
Tested-by: YongBeum Ha <ybha@samsung.com>
Reviewed-by: Gwendal Grignou <gwendal@google.com>
Diffstat (limited to 'driver/als_bh1730.h')
-rw-r--r-- | driver/als_bh1730.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/driver/als_bh1730.h b/driver/als_bh1730.h new file mode 100644 index 0000000000..3cd8757822 --- /dev/null +++ b/driver/als_bh1730.h @@ -0,0 +1,91 @@ +/* Copyright 2017 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. + * + * Rohm BH1730 Ambient light sensor driver + */ + +#ifndef __CROS_EC_ALS_BH1730_H +#define __CROS_EC_ALS_BH1730_H + +/* I2C interface */ +#define BH1730_I2C_ADDR (0x29 << 1) + +/* BH1730 registers */ +#define BH1730_CONTROL 0x80 +#define BH1730_TIMING 0x81 +#define BH1730_INTERRUPT 0x82 +#define BH1730_THLLOW 0x83 +#define BH1730_THLHIGH 0x84 +#define BH1730_THHLOW 0x85 +#define BH1730_THHHIGH 0x86 +#define BH1730_GAIN 0x87 +#define BH1730_OPART_ID 0x92 +#define BH1730_DATA0LOW 0x94 +#define BH1730_DATA0HIGH 0x95 +#define BH1730_DATA1LOW 0x96 +#define BH1730_DATA1HIGH 0x97 +/* Software reset */ +#define BH1730_RESET 0xE4 + +/* Registers bits */ +#define BH1730_CONTROL_ADC_INTR_INACTIVE (0x00 << 5) +#define BH1730_CONTROL_ADC_INTR_ACTIVE (0x01 << 5) +#define BH1730_CONTROL_ADC_VALID (0x01 << 4) +#define BH1730_CONTROL_ONE_TIME_CONTINOUS (0x00 << 3) +#define BH1730_CONTROL_ONE_TIME_ONETIME (0x01 << 3) +#define BH1730_CONTROL_DATA_SEL_TYPE0_AND_1 (0x00 << 2) +#define BH1730_CONTROL_DATA_SEL_TYPE0 (0x01 << 2) +#define BH1730_CONTROL_ADC_EN_DISABLE (0x00 << 1) +#define BH1730_CONTROL_ADC_EN_ENABLE (0x01 << 1) +#define BH1730_CONTROL_POWER_DISABLE (0x00 << 0) +#define BH1730_CONTROL_POWER_ENABLE (0x01 << 0) + +#define BH1730_GAIN_GAIN_X1_GAIN (0x00 << 0) +#define BH1730_GAIN_GAIN_X2_GAIN (0x01 << 0) +#define BH1730_GAIN_GAIN_X64_GAIN (0x02 << 0) +#define BH1730_GAIN_GAIN_X128_GAIN (0x03 << 0) + +/* Sensor configuration */ +/* Select Gain */ +#define BH1730_CONF_GAIN BH1730_GAIN_GAIN_X64_GAIN +#define BH1730_GAIN_DIV 64 + +/* Select Itime, 0xDA is 102.6ms = 38*2.7ms */ +#define BH1730_CONF_ITIME 0xDA +#define ITIME_MS_X_10 ((256 - BH1730_CONF_ITIME) * 27) +#define ITIME_MS_X_1K (ITIME_MS_X_10*100) + +/* default Itime is about 10Hz */ +#define BH1730_10000_MHZ (10*1000) + +/* + * Use default lux calculation formula parameters if board specific + * parameters are not defined. + */ +#ifndef CONFIG_ALS_BH1730_LUXTH_PARAMS +#define BH1730_LUXTH1_1K 260 +#define BH1730_LUXTH1_D0_1K 1290 +#define BH1730_LUXTH1_D1_1K 2733 +#define BH1730_LUXTH2_1K 550 +#define BH1730_LUXTH2_D0_1K 797 +#define BH1730_LUXTH2_D1_1K 859 +#define BH1730_LUXTH3_1K 1090 +#define BH1730_LUXTH3_D0_1K 510 +#define BH1730_LUXTH3_D1_1K 345 +#define BH1730_LUXTH4_1K 2130 +#define BH1730_LUXTH4_D0_1K 276 +#define BH1730_LUXTH4_D1_1K 130 +#endif + +#define BH1730_GET_DATA(_s) ((struct bh1730_drv_data_t *)(_s)->drv_data) + +struct bh1730_drv_data_t { + int rate; + int last_value; +}; + +extern const struct accelgyro_drv bh1730_drv; + +#endif /* __CROS_EC_ALS_BH1730_H */ + |