| /* 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_FLAGS 0x29 |
| |
| /* 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 */ |
| |
