Commit 22d199a5 authored by Slawomir Stepien's avatar Slawomir Stepien Committed by Jonathan Cameron
Browse files

iio: potentiometer: add driver for Microchip MCP413X/414X/415X/416X/423X/424X/425X/426X 

The following functionalities are supported:
 - write, read from volatile memory

Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/22060b.pdf



Signed-off-by: default avatarSlawomir Stepien <sst@poczta.fm>
Reviewed-by: default avatarJoachim Eastwood <manabian@gmail.com>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 6154a108

Documentation/devicetree/bindings/iio/potentiometer/mcp4131.txt

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* Microchip MCP413X/414X/415X/416X/423X/424X/425X/426X Digital Potentiometer

  driver



The node for this driver must be a child node of a SPI controller, hence

all mandatory properties described in



        Documentation/devicetree/bindings/spi/spi-bus.txt



must be specified.



Required properties:

	- compatible:  	Must be one of the following, depending on the

			model:

			"microchip,mcp4131-502"

			"microchip,mcp4131-103"

			"microchip,mcp4131-503"

			"microchip,mcp4131-104"

			"microchip,mcp4132-502"

			"microchip,mcp4132-103"

			"microchip,mcp4132-503"

			"microchip,mcp4132-104"

			"microchip,mcp4141-502"

			"microchip,mcp4141-103"

			"microchip,mcp4141-503"

			"microchip,mcp4141-104"

			"microchip,mcp4142-502"

			"microchip,mcp4142-103"

			"microchip,mcp4142-503"

			"microchip,mcp4142-104"

			"microchip,mcp4151-502"

			"microchip,mcp4151-103"

			"microchip,mcp4151-503"

			"microchip,mcp4151-104"

			"microchip,mcp4152-502"

			"microchip,mcp4152-103"

			"microchip,mcp4152-503"

			"microchip,mcp4152-104"

			"microchip,mcp4161-502"

			"microchip,mcp4161-103"

			"microchip,mcp4161-503"

			"microchip,mcp4161-104"

			"microchip,mcp4162-502"

			"microchip,mcp4162-103"

			"microchip,mcp4162-503"

			"microchip,mcp4162-104"

			"microchip,mcp4231-502"

			"microchip,mcp4231-103"

			"microchip,mcp4231-503"

			"microchip,mcp4231-104"

			"microchip,mcp4232-502"

			"microchip,mcp4232-103"

			"microchip,mcp4232-503"

			"microchip,mcp4232-104"

			"microchip,mcp4241-502"

			"microchip,mcp4241-103"

			"microchip,mcp4241-503"

			"microchip,mcp4241-104"

			"microchip,mcp4242-502"

			"microchip,mcp4242-103"

			"microchip,mcp4242-503"

			"microchip,mcp4242-104"

			"microchip,mcp4251-502"

			"microchip,mcp4251-103"

			"microchip,mcp4251-503"

			"microchip,mcp4251-104"

			"microchip,mcp4252-502"

			"microchip,mcp4252-103"

			"microchip,mcp4252-503"

			"microchip,mcp4252-104"

			"microchip,mcp4261-502"

			"microchip,mcp4261-103"

			"microchip,mcp4261-503"

			"microchip,mcp4261-104"

			"microchip,mcp4262-502"

			"microchip,mcp4262-103"

			"microchip,mcp4262-503"

			"microchip,mcp4262-104"



Example:

mcp4131: mcp4131@0 {

	compatible = "mcp4131-502";

	reg = <0>;

	spi-max-frequency = <500000>;

};

drivers/iio/potentiometer/Kconfig

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@@ -5,6 +5,24 @@ 


menu "Digital potentiometers"



config MCP4131

	tristate "Microchip MCP413X/414X/415X/416X/423X/424X/425X/426X Digital Potentiometer driver"

	depends on SPI

	help

	  Say yes here to build support for the Microchip

	  MCP4131, MCP4132,

	  MCP4141, MCP4142,

	  MCP4151, MCP4152,

	  MCP4161, MCP4162,

	  MCP4231, MCP4232,

	  MCP4241, MCP4242,

	  MCP4251, MCP4252,

	  MCP4261, MCP4262,

	  digital potentiomenter chips.



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

	  module will be called mcp4131.



config MCP4531

	tristate "Microchip MCP45xx/MCP46xx Digital Potentiometer driver"

	depends on I2C

drivers/iio/potentiometer/Makefile

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@@ -3,5 +3,6 @@ 
#



# When adding new entries keep the list in alphabetical order

obj-$(CONFIG_MCP4131) += mcp4131.o

obj-$(CONFIG_MCP4531) += mcp4531.o

obj-$(CONFIG_TPL0102) += tpl0102.o

drivers/iio/potentiometer/mcp4131.c

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/*

 * Industrial I/O driver for Microchip digital potentiometers

 *

 * Copyright (c) 2016 Slawomir Stepien

 * Based on: Peter Rosin's code from mcp4531.c

 *

 * Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/22060b.pdf

 *

 * DEVID	#Wipers	#Positions	Resistor Opts (kOhm)

 * mcp4131	1	129		5, 10, 50, 100

 * mcp4132	1	129		5, 10, 50, 100

 * mcp4141	1	129		5, 10, 50, 100

 * mcp4142	1	129		5, 10, 50, 100

 * mcp4151	1	257		5, 10, 50, 100

 * mcp4152	1	257		5, 10, 50, 100

 * mcp4161	1	257		5, 10, 50, 100

 * mcp4162	1	257		5, 10, 50, 100

 * mcp4231	2	129		5, 10, 50, 100

 * mcp4232	2	129		5, 10, 50, 100

 * mcp4241	2	129		5, 10, 50, 100

 * mcp4242	2	129		5, 10, 50, 100

 * mcp4251	2	257		5, 10, 50, 100

 * mcp4252	2	257		5, 10, 50, 100

 * mcp4261	2	257		5, 10, 50, 100

 * mcp4262	2	257		5, 10, 50, 100

 *

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

 * under the terms of the GNU General Public License version 2 as published by

 * the Free Software Foundation.

 */



/*

 * TODO:

 * 1. Write wiper setting to EEPROM for EEPROM capable models.

 */



#include <linux/cache.h>

#include <linux/err.h>

#include <linux/export.h>

#include <linux/iio/iio.h>

#include <linux/iio/types.h>

#include <linux/module.h>

#include <linux/mutex.h>

#include <linux/of.h>

#include <linux/spi/spi.h>



#define MCP4131_WRITE		(0x00 << 2)

#define MCP4131_READ		(0x03 << 2)



#define MCP4131_WIPER_SHIFT	4

#define MCP4131_CMDERR(r)	((r[0]) & 0x02)

#define MCP4131_RAW(r)		((r[0]) == 0xff ? 0x100 : (r[1]))



struct mcp4131_cfg {

	int wipers;

	int max_pos;

	int kohms;

};



enum mcp4131_type {

	MCP413x_502 = 0,

	MCP413x_103,

	MCP413x_503,

	MCP413x_104,

	MCP414x_502,

	MCP414x_103,

	MCP414x_503,

	MCP414x_104,

	MCP415x_502,

	MCP415x_103,

	MCP415x_503,

	MCP415x_104,

	MCP416x_502,

	MCP416x_103,

	MCP416x_503,

	MCP416x_104,

	MCP423x_502,

	MCP423x_103,

	MCP423x_503,

	MCP423x_104,

	MCP424x_502,

	MCP424x_103,

	MCP424x_503,

	MCP424x_104,

	MCP425x_502,

	MCP425x_103,

	MCP425x_503,

	MCP425x_104,

	MCP426x_502,

	MCP426x_103,

	MCP426x_503,

	MCP426x_104,

};



static const struct mcp4131_cfg mcp4131_cfg[] = {

	[MCP413x_502] = { .wipers = 1, .max_pos = 128, .kohms =   5, },

	[MCP413x_103] = { .wipers = 1, .max_pos = 128, .kohms =  10, },

	[MCP413x_503] = { .wipers = 1, .max_pos = 128, .kohms =  50, },

	[MCP413x_104] = { .wipers = 1, .max_pos = 128, .kohms = 100, },

	[MCP414x_502] = { .wipers = 1, .max_pos = 128, .kohms =   5, },

	[MCP414x_103] = { .wipers = 1, .max_pos = 128, .kohms =  10, },

	[MCP414x_503] = { .wipers = 1, .max_pos = 128, .kohms =  50, },

	[MCP414x_104] = { .wipers = 1, .max_pos = 128, .kohms = 100, },

	[MCP415x_502] = { .wipers = 1, .max_pos = 256, .kohms =   5, },

	[MCP415x_103] = { .wipers = 1, .max_pos = 256, .kohms =  10, },

	[MCP415x_503] = { .wipers = 1, .max_pos = 256, .kohms =  50, },

	[MCP415x_104] = { .wipers = 1, .max_pos = 256, .kohms = 100, },

	[MCP416x_502] = { .wipers = 1, .max_pos = 256, .kohms =   5, },

	[MCP416x_103] = { .wipers = 1, .max_pos = 256, .kohms =  10, },

	[MCP416x_503] = { .wipers = 1, .max_pos = 256, .kohms =  50, },

	[MCP416x_104] = { .wipers = 1, .max_pos = 256, .kohms = 100, },

	[MCP423x_502] = { .wipers = 2, .max_pos = 128, .kohms =   5, },

	[MCP423x_103] = { .wipers = 2, .max_pos = 128, .kohms =  10, },

	[MCP423x_503] = { .wipers = 2, .max_pos = 128, .kohms =  50, },

	[MCP423x_104] = { .wipers = 2, .max_pos = 128, .kohms = 100, },

	[MCP424x_502] = { .wipers = 2, .max_pos = 128, .kohms =   5, },

	[MCP424x_103] = { .wipers = 2, .max_pos = 128, .kohms =  10, },

	[MCP424x_503] = { .wipers = 2, .max_pos = 128, .kohms =  50, },

	[MCP424x_104] = { .wipers = 2, .max_pos = 128, .kohms = 100, },

	[MCP425x_502] = { .wipers = 2, .max_pos = 256, .kohms =   5, },

	[MCP425x_103] = { .wipers = 2, .max_pos = 256, .kohms =  10, },

	[MCP425x_503] = { .wipers = 2, .max_pos = 256, .kohms =  50, },

	[MCP425x_104] = { .wipers = 2, .max_pos = 256, .kohms = 100, },

	[MCP426x_502] = { .wipers = 2, .max_pos = 256, .kohms =   5, },

	[MCP426x_103] = { .wipers = 2, .max_pos = 256, .kohms =  10, },

	[MCP426x_503] = { .wipers = 2, .max_pos = 256, .kohms =  50, },

	[MCP426x_104] = { .wipers = 2, .max_pos = 256, .kohms = 100, },

};



struct mcp4131_data {

	struct spi_device *spi;

	const struct mcp4131_cfg *cfg;

	struct mutex lock;

	u8 buf[2] ____cacheline_aligned;

};



#define MCP4131_CHANNEL(ch) {					\

	.type = IIO_RESISTANCE,					\

	.indexed = 1,						\

	.output = 1,						\

	.channel = (ch),					\

	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),		\

	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\

}



static const struct iio_chan_spec mcp4131_channels[] = {

	MCP4131_CHANNEL(0),

	MCP4131_CHANNEL(1),

};



static int mcp4131_read(struct spi_device *spi, void *buf, size_t len)

{

	struct spi_transfer t = {

		.tx_buf = buf, /* We need to send addr, cmd and 12 bits */

		.rx_buf	= buf,

		.len = len,

	};

	struct spi_message m;



	spi_message_init(&m);

	spi_message_add_tail(&t, &m);



	return spi_sync(spi, &m);

}



static int mcp4131_read_raw(struct iio_dev *indio_dev,

			    struct iio_chan_spec const *chan,

			    int *val, int *val2, long mask)

{

	int err;

	struct mcp4131_data *data = iio_priv(indio_dev);

	int address = chan->channel;



	switch (mask) {

	case IIO_CHAN_INFO_RAW:

		mutex_lock(&data->lock);



		data->buf[0] = (address << MCP4131_WIPER_SHIFT) | MCP4131_READ;

		data->buf[1] = 0;



		err = mcp4131_read(data->spi, data->buf, 2);

		if (err) {

			mutex_unlock(&data->lock);

			return err;

		}



		/* Error, bad address/command combination */

		if (!MCP4131_CMDERR(data->buf)) {

			mutex_unlock(&data->lock);

			return -EIO;

		}



		*val = MCP4131_RAW(data->buf);

		mutex_unlock(&data->lock);



		return IIO_VAL_INT;



	case IIO_CHAN_INFO_SCALE:

		*val = 1000 * data->cfg->kohms;

		*val2 = data->cfg->max_pos;

		return IIO_VAL_FRACTIONAL;

	}



	return -EINVAL;

}



static int mcp4131_write_raw(struct iio_dev *indio_dev,

			     struct iio_chan_spec const *chan,

			     int val, int val2, long mask)

{

	int err;

	struct mcp4131_data *data = iio_priv(indio_dev);

	int address = chan->channel << MCP4131_WIPER_SHIFT;



	switch (mask) {

	case IIO_CHAN_INFO_RAW:

		if (val > data->cfg->max_pos || val < 0)

			return -EINVAL;

		break;



	default:

		return -EINVAL;

	}



	mutex_lock(&data->lock);



	data->buf[0] = address << MCP4131_WIPER_SHIFT;

	data->buf[0] |= MCP4131_WRITE | (val >> 8);

	data->buf[1] = val & 0xFF; /* 8 bits here */



	err = spi_write(data->spi, data->buf, 2);

	mutex_unlock(&data->lock);



	return err;

}



static const struct iio_info mcp4131_info = {

	.read_raw = mcp4131_read_raw,

	.write_raw = mcp4131_write_raw,

	.driver_module = THIS_MODULE,

};



static int mcp4131_probe(struct spi_device *spi)

{

	int err;

	struct device *dev = &spi->dev;

	unsigned long devid = spi_get_device_id(spi)->driver_data;

	struct mcp4131_data *data;

	struct iio_dev *indio_dev;



	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));

	if (!indio_dev)

		return -ENOMEM;



	data = iio_priv(indio_dev);

	spi_set_drvdata(spi, indio_dev);

	data->spi = spi;

	data->cfg = &mcp4131_cfg[devid];



	mutex_init(&data->lock);



	indio_dev->dev.parent = dev;

	indio_dev->info = &mcp4131_info;

	indio_dev->channels = mcp4131_channels;

	indio_dev->num_channels = data->cfg->wipers;

	indio_dev->name = spi_get_device_id(spi)->name;



	err = devm_iio_device_register(dev, indio_dev);

	if (err) {

		dev_info(&spi->dev, "Unable to register %s\n", indio_dev->name);

		return err;

	}



	return 0;

}



#if defined(CONFIG_OF)

static const struct of_device_id mcp4131_dt_ids[] = {

	{ .compatible = "microchip,mcp4131-502",

		.data = &mcp4131_cfg[MCP413x_502] },

	{ .compatible = "microchip,mcp4131-103",

		.data = &mcp4131_cfg[MCP413x_103] },

	{ .compatible = "microchip,mcp4131-503",

		.data = &mcp4131_cfg[MCP413x_503] },

	{ .compatible = "microchip,mcp4131-104",

		.data = &mcp4131_cfg[MCP413x_104] },

	{ .compatible = "microchip,mcp4132-502",

		.data = &mcp4131_cfg[MCP413x_502] },

	{ .compatible = "microchip,mcp4132-103",

		.data = &mcp4131_cfg[MCP413x_103] },

	{ .compatible = "microchip,mcp4132-503",

		.data = &mcp4131_cfg[MCP413x_503] },

	{ .compatible = "microchip,mcp4132-104",

		.data = &mcp4131_cfg[MCP413x_104] },

	{ .compatible = "microchip,mcp4141-502",

		.data = &mcp4131_cfg[MCP414x_502] },

	{ .compatible = "microchip,mcp4141-103",

		.data = &mcp4131_cfg[MCP414x_103] },

	{ .compatible = "microchip,mcp4141-503",

		.data = &mcp4131_cfg[MCP414x_503] },

	{ .compatible = "microchip,mcp4141-104",

		.data = &mcp4131_cfg[MCP414x_104] },

	{ .compatible = "microchip,mcp4142-502",

		.data = &mcp4131_cfg[MCP414x_502] },

	{ .compatible = "microchip,mcp4142-103",

		.data = &mcp4131_cfg[MCP414x_103] },

	{ .compatible = "microchip,mcp4142-503",

		.data = &mcp4131_cfg[MCP414x_503] },

	{ .compatible = "microchip,mcp4142-104",

		.data = &mcp4131_cfg[MCP414x_104] },

	{ .compatible = "microchip,mcp4151-502",

		.data = &mcp4131_cfg[MCP415x_502] },

	{ .compatible = "microchip,mcp4151-103",

		.data = &mcp4131_cfg[MCP415x_103] },

	{ .compatible = "microchip,mcp4151-503",

		.data = &mcp4131_cfg[MCP415x_503] },

	{ .compatible = "microchip,mcp4151-104",

		.data = &mcp4131_cfg[MCP415x_104] },

	{ .compatible = "microchip,mcp4152-502",

		.data = &mcp4131_cfg[MCP415x_502] },

	{ .compatible = "microchip,mcp4152-103",

		.data = &mcp4131_cfg[MCP415x_103] },

	{ .compatible = "microchip,mcp4152-503",

		.data = &mcp4131_cfg[MCP415x_503] },

	{ .compatible = "microchip,mcp4152-104",

		.data = &mcp4131_cfg[MCP415x_104] },

	{ .compatible = "microchip,mcp4161-502",

		.data = &mcp4131_cfg[MCP416x_502] },

	{ .compatible = "microchip,mcp4161-103",

		.data = &mcp4131_cfg[MCP416x_103] },

	{ .compatible = "microchip,mcp4161-503",

		.data = &mcp4131_cfg[MCP416x_503] },

	{ .compatible = "microchip,mcp4161-104",

		.data = &mcp4131_cfg[MCP416x_104] },

	{ .compatible = "microchip,mcp4162-502",

		.data = &mcp4131_cfg[MCP416x_502] },

	{ .compatible = "microchip,mcp4162-103",

		.data = &mcp4131_cfg[MCP416x_103] },

	{ .compatible = "microchip,mcp4162-503",

		.data = &mcp4131_cfg[MCP416x_503] },

	{ .compatible = "microchip,mcp4162-104",

		.data = &mcp4131_cfg[MCP416x_104] },

	{ .compatible = "microchip,mcp4231-502",

		.data = &mcp4131_cfg[MCP423x_502] },

	{ .compatible = "microchip,mcp4231-103",

		.data = &mcp4131_cfg[MCP423x_103] },

	{ .compatible = "microchip,mcp4231-503",

		.data = &mcp4131_cfg[MCP423x_503] },

	{ .compatible = "microchip,mcp4231-104",

		.data = &mcp4131_cfg[MCP423x_104] },

	{ .compatible = "microchip,mcp4232-502",

		.data = &mcp4131_cfg[MCP423x_502] },

	{ .compatible = "microchip,mcp4232-103",

		.data = &mcp4131_cfg[MCP423x_103] },

	{ .compatible = "microchip,mcp4232-503",

		.data = &mcp4131_cfg[MCP423x_503] },

	{ .compatible = "microchip,mcp4232-104",

		.data = &mcp4131_cfg[MCP423x_104] },

	{ .compatible = "microchip,mcp4241-502",

		.data = &mcp4131_cfg[MCP424x_502] },

	{ .compatible = "microchip,mcp4241-103",

		.data = &mcp4131_cfg[MCP424x_103] },

	{ .compatible = "microchip,mcp4241-503",

		.data = &mcp4131_cfg[MCP424x_503] },

	{ .compatible = "microchip,mcp4241-104",

		.data = &mcp4131_cfg[MCP424x_104] },

	{ .compatible = "microchip,mcp4242-502",

		.data = &mcp4131_cfg[MCP424x_502] },

	{ .compatible = "microchip,mcp4242-103",

		.data = &mcp4131_cfg[MCP424x_103] },

	{ .compatible = "microchip,mcp4242-503",

		.data = &mcp4131_cfg[MCP424x_503] },

	{ .compatible = "microchip,mcp4242-104",

		.data = &mcp4131_cfg[MCP424x_104] },

	{ .compatible = "microchip,mcp4251-502",

		.data = &mcp4131_cfg[MCP425x_502] },

	{ .compatible = "microchip,mcp4251-103",

		.data = &mcp4131_cfg[MCP425x_103] },

	{ .compatible = "microchip,mcp4251-503",

		.data = &mcp4131_cfg[MCP425x_503] },

	{ .compatible = "microchip,mcp4251-104",

		.data = &mcp4131_cfg[MCP425x_104] },

	{ .compatible = "microchip,mcp4252-502",

		.data = &mcp4131_cfg[MCP425x_502] },

	{ .compatible = "microchip,mcp4252-103",

		.data = &mcp4131_cfg[MCP425x_103] },

	{ .compatible = "microchip,mcp4252-503",

		.data = &mcp4131_cfg[MCP425x_503] },

	{ .compatible = "microchip,mcp4252-104",

		.data = &mcp4131_cfg[MCP425x_104] },

	{ .compatible = "microchip,mcp4261-502",

		.data = &mcp4131_cfg[MCP426x_502] },

	{ .compatible = "microchip,mcp4261-103",

		.data = &mcp4131_cfg[MCP426x_103] },

	{ .compatible = "microchip,mcp4261-503",

		.data = &mcp4131_cfg[MCP426x_503] },

	{ .compatible = "microchip,mcp4261-104",

		.data = &mcp4131_cfg[MCP426x_104] },

	{ .compatible = "microchip,mcp4262-502",

		.data = &mcp4131_cfg[MCP426x_502] },

	{ .compatible = "microchip,mcp4262-103",

		.data = &mcp4131_cfg[MCP426x_103] },

	{ .compatible = "microchip,mcp4262-503",

		.data = &mcp4131_cfg[MCP426x_503] },

	{ .compatible = "microchip,mcp4262-104",

		.data = &mcp4131_cfg[MCP426x_104] },

	{}

};

MODULE_DEVICE_TABLE(of, mcp4131_dt_ids);

#endif /* CONFIG_OF */



static const struct spi_device_id mcp4131_id[] = {

	{ "mcp4131-502", MCP413x_502 },

	{ "mcp4131-103", MCP413x_103 },

	{ "mcp4131-503", MCP413x_503 },

	{ "mcp4131-104", MCP413x_104 },

	{ "mcp4132-502", MCP413x_502 },

	{ "mcp4132-103", MCP413x_103 },

	{ "mcp4132-503", MCP413x_503 },

	{ "mcp4132-104", MCP413x_104 },

	{ "mcp4141-502", MCP414x_502 },

	{ "mcp4141-103", MCP414x_103 },

	{ "mcp4141-503", MCP414x_503 },

	{ "mcp4141-104", MCP414x_104 },

	{ "mcp4142-502", MCP414x_502 },

	{ "mcp4142-103", MCP414x_103 },

	{ "mcp4142-503", MCP414x_503 },

	{ "mcp4142-104", MCP414x_104 },

	{ "mcp4151-502", MCP415x_502 },

	{ "mcp4151-103", MCP415x_103 },

	{ "mcp4151-503", MCP415x_503 },

	{ "mcp4151-104", MCP415x_104 },

	{ "mcp4152-502", MCP415x_502 },

	{ "mcp4152-103", MCP415x_103 },

	{ "mcp4152-503", MCP415x_503 },

	{ "mcp4152-104", MCP415x_104 },

	{ "mcp4161-502", MCP416x_502 },

	{ "mcp4161-103", MCP416x_103 },

	{ "mcp4161-503", MCP416x_503 },

	{ "mcp4161-104", MCP416x_104 },

	{ "mcp4162-502", MCP416x_502 },

	{ "mcp4162-103", MCP416x_103 },

	{ "mcp4162-503", MCP416x_503 },

	{ "mcp4162-104", MCP416x_104 },

	{ "mcp4231-502", MCP423x_502 },

	{ "mcp4231-103", MCP423x_103 },

	{ "mcp4231-503", MCP423x_503 },

	{ "mcp4231-104", MCP423x_104 },

	{ "mcp4232-502", MCP423x_502 },

	{ "mcp4232-103", MCP423x_103 },

	{ "mcp4232-503", MCP423x_503 },

	{ "mcp4232-104", MCP423x_104 },

	{ "mcp4241-502", MCP424x_502 },

	{ "mcp4241-103", MCP424x_103 },

	{ "mcp4241-503", MCP424x_503 },

	{ "mcp4241-104", MCP424x_104 },

	{ "mcp4242-502", MCP424x_502 },

	{ "mcp4242-103", MCP424x_103 },

	{ "mcp4242-503", MCP424x_503 },

	{ "mcp4242-104", MCP424x_104 },

	{ "mcp4251-502", MCP425x_502 },

	{ "mcp4251-103", MCP425x_103 },

	{ "mcp4251-503", MCP425x_503 },

	{ "mcp4251-104", MCP425x_104 },

	{ "mcp4252-502", MCP425x_502 },

	{ "mcp4252-103", MCP425x_103 },

	{ "mcp4252-503", MCP425x_503 },

	{ "mcp4252-104", MCP425x_104 },

	{ "mcp4261-502", MCP426x_502 },

	{ "mcp4261-103", MCP426x_103 },

	{ "mcp4261-503", MCP426x_503 },

	{ "mcp4261-104", MCP426x_104 },

	{ "mcp4262-502", MCP426x_502 },

	{ "mcp4262-103", MCP426x_103 },

	{ "mcp4262-503", MCP426x_503 },

	{ "mcp4262-104", MCP426x_104 },

	{}

};

MODULE_DEVICE_TABLE(spi, mcp4131_id);



static struct spi_driver mcp4131_driver = {

	.driver = {

		.name	= "mcp4131",

		.of_match_table = of_match_ptr(mcp4131_dt_ids),

	},

	.probe		= mcp4131_probe,

	.id_table	= mcp4131_id,

};



module_spi_driver(mcp4131_driver);



MODULE_AUTHOR("Slawomir Stepien <sst@poczta.fm>");

MODULE_DESCRIPTION("MCP4131 digital potentiometer");

MODULE_LICENSE("GPL v2");

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