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Commit 598893e9 authored by Hans de Goede's avatar Hans de Goede Committed by Jonathan Cameron
Browse files

iio: accel: Add driver for the MiraMEMS DA311 3-axis 12-bit digital accelerometer 

This driver is based on the DA311 Android driver which can be found here:
https://git.matricom.net/Firmware/kernel_amlogic_meson-common/tree/1e70113a5befd07debb68f537156def84c5be57a/drivers/amlogic/input/sensor


the mir3da_* files are the DA311 driver.

Unfortunately there is no datasheet.

Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 569906e2

Documentation/devicetree/bindings/i2c/trivial-devices.txt

+1 −0
Original line number Diff line number Diff line
@@ -125,6 +125,7 @@ microchip,mcp4662-502 Microchip 8-bit Dual I2C Digital Potentiometer with NV Mem 
microchip,mcp4662-103	Microchip 8-bit Dual I2C Digital Potentiometer with NV Memory (10k)

microchip,mcp4662-503	Microchip 8-bit Dual I2C Digital Potentiometer with NV Memory (50k)

microchip,mcp4662-104	Microchip 8-bit Dual I2C Digital Potentiometer with NV Memory (100k)

miramems,da311		MiraMEMS DA311 3-axis 12-bit digital accelerometer

national,lm63		Temperature sensor with integrated fan control

national,lm75		I2C TEMP SENSOR

national,lm80		Serial Interface ACPI-Compatible Microprocessor System Hardware Monitor

drivers/iio/accel/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -52,6 +52,16 @@ config BMC150_ACCEL_SPI 
	tristate

	select REGMAP_SPI



config DA311

	tristate "MiraMEMS DA311 3-axis 12-bit digital accelerometer driver"

	depends on I2C

	help

	  Say yes here to build support for the MiraMEMS DA311 3-axis 12-bit

	  digital accelerometer.



	  To compile this driver as a module, choose M here: the

	  module will be called da311.



config DMARD06

	tristate "Domintech DMARD06 Digital Accelerometer Driver"

	depends on OF || COMPILE_TEST

drivers/iio/accel/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ obj-$(CONFIG_BMA220) += bma220_spi.o 
obj-$(CONFIG_BMC150_ACCEL) += bmc150-accel-core.o

obj-$(CONFIG_BMC150_ACCEL_I2C) += bmc150-accel-i2c.o

obj-$(CONFIG_BMC150_ACCEL_SPI) += bmc150-accel-spi.o

obj-$(CONFIG_DA311)	+= da311.o

obj-$(CONFIG_DMARD06)	+= dmard06.o

obj-$(CONFIG_DMARD09)	+= dmard09.o

obj-$(CONFIG_DMARD10)	+= dmard10.o

drivers/iio/accel/da311.c

0 → 100644
+305 −0
Original line number Diff line number Diff line 
/**

 * IIO driver for the MiraMEMS DA311 3-axis accelerometer

 *

 * Copyright (c) 2016 Hans de Goede <hdegoede@redhat.com>

 * Copyright (c) 2011-2013 MiraMEMS Sensing Technology Co., Ltd.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 */



#include <linux/module.h>

#include <linux/i2c.h>

#include <linux/iio/iio.h>

#include <linux/iio/sysfs.h>

#include <linux/byteorder/generic.h>



#define DA311_CHIP_ID			0x13



/*

 * Note register addressed go from 0 - 0x3f and then wrap.

 * For some reason there are 2 banks with 0 - 0x3f addresses,

 * rather then a single 0-0x7f bank.

 */



/* Bank 0 regs */

#define DA311_REG_BANK			0x0000

#define DA311_REG_LDO_REG		0x0006

#define DA311_REG_CHIP_ID		0x000f

#define DA311_REG_TEMP_CFG_REG		0x001f

#define DA311_REG_CTRL_REG1		0x0020

#define DA311_REG_CTRL_REG3		0x0022

#define DA311_REG_CTRL_REG4		0x0023

#define DA311_REG_CTRL_REG5		0x0024

#define DA311_REG_CTRL_REG6		0x0025

#define DA311_REG_STATUS_REG		0x0027

#define DA311_REG_OUT_X_L		0x0028

#define DA311_REG_OUT_X_H		0x0029

#define DA311_REG_OUT_Y_L		0x002a

#define DA311_REG_OUT_Y_H		0x002b

#define DA311_REG_OUT_Z_L		0x002c

#define DA311_REG_OUT_Z_H		0x002d

#define DA311_REG_INT1_CFG		0x0030

#define DA311_REG_INT1_SRC		0x0031

#define DA311_REG_INT1_THS		0x0032

#define DA311_REG_INT1_DURATION		0x0033

#define DA311_REG_INT2_CFG		0x0034

#define DA311_REG_INT2_SRC		0x0035

#define DA311_REG_INT2_THS		0x0036

#define DA311_REG_INT2_DURATION		0x0037

#define DA311_REG_CLICK_CFG		0x0038

#define DA311_REG_CLICK_SRC		0x0039

#define DA311_REG_CLICK_THS		0x003a

#define DA311_REG_TIME_LIMIT		0x003b

#define DA311_REG_TIME_LATENCY		0x003c

#define DA311_REG_TIME_WINDOW		0x003d



/* Bank 1 regs */

#define DA311_REG_SOFT_RESET		0x0105

#define DA311_REG_OTP_XOFF_L		0x0110

#define DA311_REG_OTP_XOFF_H		0x0111

#define DA311_REG_OTP_YOFF_L		0x0112

#define DA311_REG_OTP_YOFF_H		0x0113

#define DA311_REG_OTP_ZOFF_L		0x0114

#define DA311_REG_OTP_ZOFF_H		0x0115

#define DA311_REG_OTP_XSO		0x0116

#define DA311_REG_OTP_YSO		0x0117

#define DA311_REG_OTP_ZSO		0x0118

#define DA311_REG_OTP_TRIM_OSC		0x011b

#define DA311_REG_LPF_ABSOLUTE		0x011c

#define DA311_REG_TEMP_OFF1		0x0127

#define DA311_REG_TEMP_OFF2		0x0128

#define DA311_REG_TEMP_OFF3		0x0129

#define DA311_REG_OTP_TRIM_THERM_H	0x011a



/*

 * a value of + or -1024 corresponds to + or - 1G

 * scale = 9.81 / 1024 = 0.009580078

 */



static const int da311_nscale = 9580078;



#define DA311_CHANNEL(reg, axis) {	\

	.type = IIO_ACCEL,	\

	.address = reg,	\

	.modified = 1,	\

	.channel2 = IIO_MOD_##axis,	\

	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),	\

	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\

}



static const struct iio_chan_spec da311_channels[] = {

	/* | 0x80 comes from the android driver */

	DA311_CHANNEL(DA311_REG_OUT_X_L | 0x80, X),

	DA311_CHANNEL(DA311_REG_OUT_Y_L | 0x80, Y),

	DA311_CHANNEL(DA311_REG_OUT_Z_L | 0x80, Z),

};



struct da311_data {

	struct i2c_client *client;

};



static int da311_register_mask_write(struct i2c_client *client, u16 addr,

				     u8 mask, u8 data)

{

	int ret;

	u8 tmp_data = 0;



	if (addr & 0xff00) {

		/* Select bank 1 */

		ret = i2c_smbus_write_byte_data(client, DA311_REG_BANK, 0x01);

		if (ret < 0)

			return ret;

	}



	if (mask != 0xff) {

		ret = i2c_smbus_read_byte_data(client, addr);

		if (ret < 0)

			return ret;

		tmp_data = ret;

	}



	tmp_data &= ~mask;

	tmp_data |= data & mask;

	ret = i2c_smbus_write_byte_data(client, addr & 0xff, tmp_data);

	if (ret < 0)

		return ret;



	if (addr & 0xff00) {

		/* Back to bank 0 */

		ret = i2c_smbus_write_byte_data(client, DA311_REG_BANK, 0x00);

		if (ret < 0)

			return ret;

	}



	return 0;

}



/* Init sequence taken from the android driver */

static int da311_reset(struct i2c_client *client)

{

	const struct {

		u16 addr;

		u8 mask;

		u8 data;

	} init_data[] = {

		{ DA311_REG_TEMP_CFG_REG,       0xff,   0x08 },

		{ DA311_REG_CTRL_REG5,          0xff,   0x80 },

		{ DA311_REG_CTRL_REG4,          0x30,   0x00 },

		{ DA311_REG_CTRL_REG1,          0xff,   0x6f },

		{ DA311_REG_TEMP_CFG_REG,       0xff,   0x88 },

		{ DA311_REG_LDO_REG,            0xff,   0x02 },

		{ DA311_REG_OTP_TRIM_OSC,       0xff,   0x27 },

		{ DA311_REG_LPF_ABSOLUTE,       0xff,   0x30 },

		{ DA311_REG_TEMP_OFF1,          0xff,   0x3f },

		{ DA311_REG_TEMP_OFF2,          0xff,   0xff },

		{ DA311_REG_TEMP_OFF3,          0xff,   0x0f },

	};

	int i, ret;



	/* Reset */

	ret = da311_register_mask_write(client, DA311_REG_SOFT_RESET,

					0xff, 0xaa);

	if (ret < 0)

		return ret;



	for (i = 0; i < ARRAY_SIZE(init_data); i++) {

		ret = da311_register_mask_write(client,

						init_data[i].addr,

						init_data[i].mask,

						init_data[i].data);

		if (ret < 0)

			return ret;

	}



	return 0;

}



static int da311_enable(struct i2c_client *client, bool enable)

{

	u8 data = enable ? 0x00 : 0x20;



	return da311_register_mask_write(client, DA311_REG_TEMP_CFG_REG,

					 0x20, data);

}



static int da311_read_raw(struct iio_dev *indio_dev,

				struct iio_chan_spec const *chan,

				int *val, int *val2, long mask)

{

	struct da311_data *data = iio_priv(indio_dev);

	int ret;



	switch (mask) {

	case IIO_CHAN_INFO_RAW:

		ret = i2c_smbus_read_word_data(data->client, chan->address);

		if (ret < 0)

			return ret;

		/*

		 * Values are 12 bits, stored as 16 bits with the 4

		 * least significant bits always 0.

		 */

		*val = (short)ret >> 4;

		return IIO_VAL_INT;

	case IIO_CHAN_INFO_SCALE:

		*val = 0;

		*val2 = da311_nscale;

		return IIO_VAL_INT_PLUS_NANO;

	default:

		return -EINVAL;

	}

}



static const struct iio_info da311_info = {

	.driver_module	= THIS_MODULE,

	.read_raw	= da311_read_raw,

};



static int da311_probe(struct i2c_client *client,

			const struct i2c_device_id *id)

{

	int ret;

	struct iio_dev *indio_dev;

	struct da311_data *data;



	ret = i2c_smbus_read_byte_data(client, DA311_REG_CHIP_ID);

	if (ret != DA311_CHIP_ID)

		return (ret < 0) ? ret : -ENODEV;



	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));

	if (!indio_dev)

		return -ENOMEM;



	data = iio_priv(indio_dev);

	data->client = client;

	i2c_set_clientdata(client, indio_dev);



	indio_dev->dev.parent = &client->dev;

	indio_dev->info = &da311_info;

	indio_dev->name = "da311";

	indio_dev->modes = INDIO_DIRECT_MODE;

	indio_dev->channels = da311_channels;

	indio_dev->num_channels = ARRAY_SIZE(da311_channels);



	ret = da311_reset(client);

	if (ret < 0)

		return ret;



	ret = da311_enable(client, true);

	if (ret < 0)

		return ret;



	ret = iio_device_register(indio_dev);

	if (ret < 0) {

		dev_err(&client->dev, "device_register failed\n");

		da311_enable(client, false);

	}



	return ret;

}



static int da311_remove(struct i2c_client *client)

{

	struct iio_dev *indio_dev = i2c_get_clientdata(client);



	iio_device_unregister(indio_dev);



	return da311_enable(client, false);

}



#ifdef CONFIG_PM_SLEEP

static int da311_suspend(struct device *dev)

{

	return da311_enable(to_i2c_client(dev), false);

}



static int da311_resume(struct device *dev)

{

	return da311_enable(to_i2c_client(dev), true);

}

#endif



static SIMPLE_DEV_PM_OPS(da311_pm_ops, da311_suspend, da311_resume);



static const struct i2c_device_id da311_i2c_id[] = {

	{"da311", 0},

	{}

};

MODULE_DEVICE_TABLE(i2c, da311_i2c_id);



static struct i2c_driver da311_driver = {

	.driver = {

		.name = "da311",

		.pm = &da311_pm_ops,

	},

	.probe		= da311_probe,

	.remove		= da311_remove,

	.id_table	= da311_i2c_id,

};



module_i2c_driver(da311_driver);



MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");

MODULE_DESCRIPTION("MiraMEMS DA311 3-Axis Accelerometer driver");

MODULE_LICENSE("GPL v2");