sensor_ak8975.h

/*
 * Copyright (c) 2016 Intel Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef __SENSOR_AK8975__
#define __SENSOR_AK8975__

#include <device.h>

#define SYS_LOG_DOMAIN "AK8975"
#define SYS_LOG_LEVEL CONFIG_SYS_LOG_SENSOR_LEVEL
#include <misc/sys_log.h>

#define AK8975_REG_CHIP_ID		0x00
#define AK8975_CHIP_ID			0x48

#define AK8975_REG_DATA_START		0x03

#define AK8975_REG_CNTL			0x0A
#define AK8975_MODE_MEASURE		0x01
#define AK8975_MODE_FUSE_ACCESS		0x0F

#define AK8975_REG_ADJ_DATA_START	0x10

#define AK8975_MEASURE_TIME_US		9000
#define AK8975_MICRO_GAUSS_PER_BIT	3000

#ifdef CONFIG_MPU9150
#if CONFIG_AK8975_I2C_ADDR != 0x0C
#error "I2C address must be 0x0C when AK8975 is part of a MPU9150 chip"
#endif

#ifdef CONFIG_MPU9150_I2C_ADDR
#define MPU9150_I2C_ADDR		CONFIG_MPU9150_I2C_ADDR
#else
#define MPU9150_I2C_ADDR		CONFIG_MPU6050_I2C_ADDR
#endif

#define MPU9150_REG_BYPASS_CFG		0x37
#define MPU9150_I2C_BYPASS_EN		BIT(1)

#define MPU9150_REG_PWR_MGMT1		0x6B
#define MPU9150_SLEEP_EN		BIT(6)

#endif /* CONFIG_MPU9150 */


struct ak8975_data {
	struct device *i2c;

	int16_t x_sample;
	int16_t y_sample;
	int16_t z_sample;

	uint8_t x_adj;
	uint8_t y_adj;
	uint8_t z_adj;
};

#endif /* __SENSOR_AK8975__ */