531 lines
14 KiB
C
531 lines
14 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-only
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2013 Oskar Andero <oskar.andero@gmail.com>
|
||
|
|
* Copyright (C) 2014 Rose Technology
|
||
|
|
* Allan Bendorff Jensen <abj@rosetechnology.dk>
|
||
|
|
* Soren Andersen <san@rosetechnology.dk>
|
||
|
|
*
|
||
|
|
* Driver for following ADC chips from Microchip Technology's:
|
||
|
|
* 10 Bit converter
|
||
|
|
* MCP3001
|
||
|
|
* MCP3002
|
||
|
|
* MCP3004
|
||
|
|
* MCP3008
|
||
|
|
* ------------
|
||
|
|
* 12 bit converter
|
||
|
|
* MCP3201
|
||
|
|
* MCP3202
|
||
|
|
* MCP3204
|
||
|
|
* MCP3208
|
||
|
|
* ------------
|
||
|
|
* 13 bit converter
|
||
|
|
* MCP3301
|
||
|
|
* ------------
|
||
|
|
* 22 bit converter
|
||
|
|
* MCP3550
|
||
|
|
* MCP3551
|
||
|
|
* MCP3553
|
||
|
|
*
|
||
|
|
* Datasheet can be found here:
|
||
|
|
* https://ww1.microchip.com/downloads/en/DeviceDoc/21293C.pdf mcp3001
|
||
|
|
* https://ww1.microchip.com/downloads/en/DeviceDoc/21294E.pdf mcp3002
|
||
|
|
* https://ww1.microchip.com/downloads/en/DeviceDoc/21295d.pdf mcp3004/08
|
||
|
|
* http://ww1.microchip.com/downloads/en/DeviceDoc/21290D.pdf mcp3201
|
||
|
|
* http://ww1.microchip.com/downloads/en/DeviceDoc/21034D.pdf mcp3202
|
||
|
|
* http://ww1.microchip.com/downloads/en/DeviceDoc/21298c.pdf mcp3204/08
|
||
|
|
* https://ww1.microchip.com/downloads/en/DeviceDoc/21700E.pdf mcp3301
|
||
|
|
* http://ww1.microchip.com/downloads/en/DeviceDoc/21950D.pdf mcp3550/1/3
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/err.h>
|
||
|
|
#include <linux/delay.h>
|
||
|
|
#include <linux/spi/spi.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/mod_devicetable.h>
|
||
|
|
#include <linux/iio/iio.h>
|
||
|
|
#include <linux/regulator/consumer.h>
|
||
|
|
|
||
|
|
enum {
|
||
|
|
mcp3001,
|
||
|
|
mcp3002,
|
||
|
|
mcp3004,
|
||
|
|
mcp3008,
|
||
|
|
mcp3201,
|
||
|
|
mcp3202,
|
||
|
|
mcp3204,
|
||
|
|
mcp3208,
|
||
|
|
mcp3301,
|
||
|
|
mcp3550_50,
|
||
|
|
mcp3550_60,
|
||
|
|
mcp3551,
|
||
|
|
mcp3553,
|
||
|
|
};
|
||
|
|
|
||
|
|
struct mcp320x_chip_info {
|
||
|
|
const struct iio_chan_spec *channels;
|
||
|
|
unsigned int num_channels;
|
||
|
|
unsigned int resolution;
|
||
|
|
unsigned int conv_time; /* usec */
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct mcp320x - Microchip SPI ADC instance
|
||
|
|
* @spi: SPI slave (parent of the IIO device)
|
||
|
|
* @msg: SPI message to select a channel and receive a value from the ADC
|
||
|
|
* @transfer: SPI transfers used by @msg
|
||
|
|
* @start_conv_msg: SPI message to start a conversion by briefly asserting CS
|
||
|
|
* @start_conv_transfer: SPI transfer used by @start_conv_msg
|
||
|
|
* @reg: regulator generating Vref
|
||
|
|
* @lock: protects read sequences
|
||
|
|
* @chip_info: ADC properties
|
||
|
|
* @tx_buf: buffer for @transfer[0] (not used on single-channel converters)
|
||
|
|
* @rx_buf: buffer for @transfer[1]
|
||
|
|
*/
|
||
|
|
struct mcp320x {
|
||
|
|
struct spi_device *spi;
|
||
|
|
struct spi_message msg;
|
||
|
|
struct spi_transfer transfer[2];
|
||
|
|
struct spi_message start_conv_msg;
|
||
|
|
struct spi_transfer start_conv_transfer;
|
||
|
|
|
||
|
|
struct regulator *reg;
|
||
|
|
struct mutex lock;
|
||
|
|
const struct mcp320x_chip_info *chip_info;
|
||
|
|
|
||
|
|
u8 tx_buf __aligned(IIO_DMA_MINALIGN);
|
||
|
|
u8 rx_buf[4];
|
||
|
|
};
|
||
|
|
|
||
|
|
static int mcp320x_channel_to_tx_data(int device_index,
|
||
|
|
const unsigned int channel, bool differential)
|
||
|
|
{
|
||
|
|
int start_bit = 1;
|
||
|
|
|
||
|
|
switch (device_index) {
|
||
|
|
case mcp3002:
|
||
|
|
case mcp3202:
|
||
|
|
return ((start_bit << 4) | (!differential << 3) |
|
||
|
|
(channel << 2));
|
||
|
|
case mcp3004:
|
||
|
|
case mcp3204:
|
||
|
|
case mcp3008:
|
||
|
|
case mcp3208:
|
||
|
|
return ((start_bit << 6) | (!differential << 5) |
|
||
|
|
(channel << 2));
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int mcp320x_adc_conversion(struct mcp320x *adc, u8 channel,
|
||
|
|
bool differential, int device_index, int *val)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (adc->chip_info->conv_time) {
|
||
|
|
ret = spi_sync(adc->spi, &adc->start_conv_msg);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
usleep_range(adc->chip_info->conv_time,
|
||
|
|
adc->chip_info->conv_time + 100);
|
||
|
|
}
|
||
|
|
|
||
|
|
memset(&adc->rx_buf, 0, sizeof(adc->rx_buf));
|
||
|
|
if (adc->chip_info->num_channels > 1)
|
||
|
|
adc->tx_buf = mcp320x_channel_to_tx_data(device_index, channel,
|
||
|
|
differential);
|
||
|
|
|
||
|
|
ret = spi_sync(adc->spi, &adc->msg);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
switch (device_index) {
|
||
|
|
case mcp3001:
|
||
|
|
*val = (adc->rx_buf[0] << 5 | adc->rx_buf[1] >> 3);
|
||
|
|
return 0;
|
||
|
|
case mcp3002:
|
||
|
|
case mcp3004:
|
||
|
|
case mcp3008:
|
||
|
|
*val = (adc->rx_buf[0] << 2 | adc->rx_buf[1] >> 6);
|
||
|
|
return 0;
|
||
|
|
case mcp3201:
|
||
|
|
*val = (adc->rx_buf[0] << 7 | adc->rx_buf[1] >> 1);
|
||
|
|
return 0;
|
||
|
|
case mcp3202:
|
||
|
|
case mcp3204:
|
||
|
|
case mcp3208:
|
||
|
|
*val = (adc->rx_buf[0] << 4 | adc->rx_buf[1] >> 4);
|
||
|
|
return 0;
|
||
|
|
case mcp3301:
|
||
|
|
*val = sign_extend32((adc->rx_buf[0] & 0x1f) << 8
|
||
|
|
| adc->rx_buf[1], 12);
|
||
|
|
return 0;
|
||
|
|
case mcp3550_50:
|
||
|
|
case mcp3550_60:
|
||
|
|
case mcp3551:
|
||
|
|
case mcp3553: {
|
||
|
|
u32 raw = be32_to_cpup((__be32 *)adc->rx_buf);
|
||
|
|
|
||
|
|
if (!(adc->spi->mode & SPI_CPOL))
|
||
|
|
raw <<= 1; /* strip Data Ready bit in SPI mode 0,0 */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If the input is within -vref and vref, bit 21 is the sign.
|
||
|
|
* Up to 12% overrange or underrange are allowed, in which case
|
||
|
|
* bit 23 is the sign and bit 0 to 21 is the value.
|
||
|
|
*/
|
||
|
|
raw >>= 8;
|
||
|
|
if (raw & BIT(22) && raw & BIT(23))
|
||
|
|
return -EIO; /* cannot have overrange AND underrange */
|
||
|
|
else if (raw & BIT(22))
|
||
|
|
raw &= ~BIT(22); /* overrange */
|
||
|
|
else if (raw & BIT(23) || raw & BIT(21))
|
||
|
|
raw |= GENMASK(31, 22); /* underrange or negative */
|
||
|
|
|
||
|
|
*val = (s32)raw;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int mcp320x_read_raw(struct iio_dev *indio_dev,
|
||
|
|
struct iio_chan_spec const *channel, int *val,
|
||
|
|
int *val2, long mask)
|
||
|
|
{
|
||
|
|
struct mcp320x *adc = iio_priv(indio_dev);
|
||
|
|
int ret = -EINVAL;
|
||
|
|
int device_index = 0;
|
||
|
|
|
||
|
|
mutex_lock(&adc->lock);
|
||
|
|
|
||
|
|
device_index = spi_get_device_id(adc->spi)->driver_data;
|
||
|
|
|
||
|
|
switch (mask) {
|
||
|
|
case IIO_CHAN_INFO_RAW:
|
||
|
|
ret = mcp320x_adc_conversion(adc, channel->address,
|
||
|
|
channel->differential, device_index, val);
|
||
|
|
if (ret < 0)
|
||
|
|
goto out;
|
||
|
|
|
||
|
|
ret = IIO_VAL_INT;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case IIO_CHAN_INFO_SCALE:
|
||
|
|
ret = regulator_get_voltage(adc->reg);
|
||
|
|
if (ret < 0)
|
||
|
|
goto out;
|
||
|
|
|
||
|
|
/* convert regulator output voltage to mV */
|
||
|
|
*val = ret / 1000;
|
||
|
|
*val2 = adc->chip_info->resolution;
|
||
|
|
ret = IIO_VAL_FRACTIONAL_LOG2;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
out:
|
||
|
|
mutex_unlock(&adc->lock);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define MCP320X_VOLTAGE_CHANNEL(num) \
|
||
|
|
{ \
|
||
|
|
.type = IIO_VOLTAGE, \
|
||
|
|
.indexed = 1, \
|
||
|
|
.channel = (num), \
|
||
|
|
.address = (num), \
|
||
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
|
||
|
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define MCP320X_VOLTAGE_CHANNEL_DIFF(chan1, chan2) \
|
||
|
|
{ \
|
||
|
|
.type = IIO_VOLTAGE, \
|
||
|
|
.indexed = 1, \
|
||
|
|
.channel = (chan1), \
|
||
|
|
.channel2 = (chan2), \
|
||
|
|
.address = (chan1), \
|
||
|
|
.differential = 1, \
|
||
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
|
||
|
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) \
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct iio_chan_spec mcp3201_channels[] = {
|
||
|
|
MCP320X_VOLTAGE_CHANNEL_DIFF(0, 1),
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct iio_chan_spec mcp3202_channels[] = {
|
||
|
|
MCP320X_VOLTAGE_CHANNEL(0),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL(1),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL_DIFF(0, 1),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL_DIFF(1, 0),
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct iio_chan_spec mcp3204_channels[] = {
|
||
|
|
MCP320X_VOLTAGE_CHANNEL(0),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL(1),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL(2),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL(3),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL_DIFF(0, 1),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL_DIFF(1, 0),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL_DIFF(2, 3),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL_DIFF(3, 2),
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct iio_chan_spec mcp3208_channels[] = {
|
||
|
|
MCP320X_VOLTAGE_CHANNEL(0),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL(1),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL(2),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL(3),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL(4),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL(5),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL(6),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL(7),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL_DIFF(0, 1),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL_DIFF(1, 0),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL_DIFF(2, 3),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL_DIFF(3, 2),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL_DIFF(4, 5),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL_DIFF(5, 4),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL_DIFF(6, 7),
|
||
|
|
MCP320X_VOLTAGE_CHANNEL_DIFF(7, 6),
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct iio_info mcp320x_info = {
|
||
|
|
.read_raw = mcp320x_read_raw,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct mcp320x_chip_info mcp320x_chip_infos[] = {
|
||
|
|
[mcp3001] = {
|
||
|
|
.channels = mcp3201_channels,
|
||
|
|
.num_channels = ARRAY_SIZE(mcp3201_channels),
|
||
|
|
.resolution = 10
|
||
|
|
},
|
||
|
|
[mcp3002] = {
|
||
|
|
.channels = mcp3202_channels,
|
||
|
|
.num_channels = ARRAY_SIZE(mcp3202_channels),
|
||
|
|
.resolution = 10
|
||
|
|
},
|
||
|
|
[mcp3004] = {
|
||
|
|
.channels = mcp3204_channels,
|
||
|
|
.num_channels = ARRAY_SIZE(mcp3204_channels),
|
||
|
|
.resolution = 10
|
||
|
|
},
|
||
|
|
[mcp3008] = {
|
||
|
|
.channels = mcp3208_channels,
|
||
|
|
.num_channels = ARRAY_SIZE(mcp3208_channels),
|
||
|
|
.resolution = 10
|
||
|
|
},
|
||
|
|
[mcp3201] = {
|
||
|
|
.channels = mcp3201_channels,
|
||
|
|
.num_channels = ARRAY_SIZE(mcp3201_channels),
|
||
|
|
.resolution = 12
|
||
|
|
},
|
||
|
|
[mcp3202] = {
|
||
|
|
.channels = mcp3202_channels,
|
||
|
|
.num_channels = ARRAY_SIZE(mcp3202_channels),
|
||
|
|
.resolution = 12
|
||
|
|
},
|
||
|
|
[mcp3204] = {
|
||
|
|
.channels = mcp3204_channels,
|
||
|
|
.num_channels = ARRAY_SIZE(mcp3204_channels),
|
||
|
|
.resolution = 12
|
||
|
|
},
|
||
|
|
[mcp3208] = {
|
||
|
|
.channels = mcp3208_channels,
|
||
|
|
.num_channels = ARRAY_SIZE(mcp3208_channels),
|
||
|
|
.resolution = 12
|
||
|
|
},
|
||
|
|
[mcp3301] = {
|
||
|
|
.channels = mcp3201_channels,
|
||
|
|
.num_channels = ARRAY_SIZE(mcp3201_channels),
|
||
|
|
.resolution = 13
|
||
|
|
},
|
||
|
|
[mcp3550_50] = {
|
||
|
|
.channels = mcp3201_channels,
|
||
|
|
.num_channels = ARRAY_SIZE(mcp3201_channels),
|
||
|
|
.resolution = 21,
|
||
|
|
/* 2% max deviation + 144 clock periods to exit shutdown */
|
||
|
|
.conv_time = 80000 * 1.02 + 144000 / 102.4,
|
||
|
|
},
|
||
|
|
[mcp3550_60] = {
|
||
|
|
.channels = mcp3201_channels,
|
||
|
|
.num_channels = ARRAY_SIZE(mcp3201_channels),
|
||
|
|
.resolution = 21,
|
||
|
|
.conv_time = 66670 * 1.02 + 144000 / 122.88,
|
||
|
|
},
|
||
|
|
[mcp3551] = {
|
||
|
|
.channels = mcp3201_channels,
|
||
|
|
.num_channels = ARRAY_SIZE(mcp3201_channels),
|
||
|
|
.resolution = 21,
|
||
|
|
.conv_time = 73100 * 1.02 + 144000 / 112.64,
|
||
|
|
},
|
||
|
|
[mcp3553] = {
|
||
|
|
.channels = mcp3201_channels,
|
||
|
|
.num_channels = ARRAY_SIZE(mcp3201_channels),
|
||
|
|
.resolution = 21,
|
||
|
|
.conv_time = 16670 * 1.02 + 144000 / 122.88,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
static int mcp320x_probe(struct spi_device *spi)
|
||
|
|
{
|
||
|
|
struct iio_dev *indio_dev;
|
||
|
|
struct mcp320x *adc;
|
||
|
|
const struct mcp320x_chip_info *chip_info;
|
||
|
|
int ret, device_index;
|
||
|
|
|
||
|
|
indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adc));
|
||
|
|
if (!indio_dev)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
adc = iio_priv(indio_dev);
|
||
|
|
adc->spi = spi;
|
||
|
|
|
||
|
|
indio_dev->name = spi_get_device_id(spi)->name;
|
||
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
||
|
|
indio_dev->info = &mcp320x_info;
|
||
|
|
spi_set_drvdata(spi, indio_dev);
|
||
|
|
|
||
|
|
device_index = spi_get_device_id(spi)->driver_data;
|
||
|
|
chip_info = &mcp320x_chip_infos[device_index];
|
||
|
|
indio_dev->channels = chip_info->channels;
|
||
|
|
indio_dev->num_channels = chip_info->num_channels;
|
||
|
|
|
||
|
|
adc->chip_info = chip_info;
|
||
|
|
|
||
|
|
adc->transfer[0].tx_buf = &adc->tx_buf;
|
||
|
|
adc->transfer[0].len = sizeof(adc->tx_buf);
|
||
|
|
adc->transfer[1].rx_buf = adc->rx_buf;
|
||
|
|
adc->transfer[1].len = DIV_ROUND_UP(chip_info->resolution, 8);
|
||
|
|
|
||
|
|
if (chip_info->num_channels == 1)
|
||
|
|
/* single-channel converters are rx only (no MOSI pin) */
|
||
|
|
spi_message_init_with_transfers(&adc->msg,
|
||
|
|
&adc->transfer[1], 1);
|
||
|
|
else
|
||
|
|
spi_message_init_with_transfers(&adc->msg, adc->transfer,
|
||
|
|
ARRAY_SIZE(adc->transfer));
|
||
|
|
|
||
|
|
switch (device_index) {
|
||
|
|
case mcp3550_50:
|
||
|
|
case mcp3550_60:
|
||
|
|
case mcp3551:
|
||
|
|
case mcp3553:
|
||
|
|
/* rx len increases from 24 to 25 bit in SPI mode 0,0 */
|
||
|
|
if (!(spi->mode & SPI_CPOL))
|
||
|
|
adc->transfer[1].len++;
|
||
|
|
|
||
|
|
/* conversions are started by asserting CS pin for 8 usec */
|
||
|
|
adc->start_conv_transfer.delay.value = 8;
|
||
|
|
adc->start_conv_transfer.delay.unit = SPI_DELAY_UNIT_USECS;
|
||
|
|
spi_message_init_with_transfers(&adc->start_conv_msg,
|
||
|
|
&adc->start_conv_transfer, 1);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If CS was previously kept low (continuous conversion mode)
|
||
|
|
* and then changed to high, the chip is in shutdown.
|
||
|
|
* Sometimes it fails to wake from shutdown and clocks out
|
||
|
|
* only 0xffffff. The magic sequence of performing two
|
||
|
|
* conversions without delay between them resets the chip
|
||
|
|
* and ensures all subsequent conversions succeed.
|
||
|
|
*/
|
||
|
|
mcp320x_adc_conversion(adc, 0, 1, device_index, &ret);
|
||
|
|
mcp320x_adc_conversion(adc, 0, 1, device_index, &ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
adc->reg = devm_regulator_get(&spi->dev, "vref");
|
||
|
|
if (IS_ERR(adc->reg))
|
||
|
|
return PTR_ERR(adc->reg);
|
||
|
|
|
||
|
|
ret = regulator_enable(adc->reg);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
mutex_init(&adc->lock);
|
||
|
|
|
||
|
|
ret = iio_device_register(indio_dev);
|
||
|
|
if (ret < 0)
|
||
|
|
goto reg_disable;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
reg_disable:
|
||
|
|
regulator_disable(adc->reg);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void mcp320x_remove(struct spi_device *spi)
|
||
|
|
{
|
||
|
|
struct iio_dev *indio_dev = spi_get_drvdata(spi);
|
||
|
|
struct mcp320x *adc = iio_priv(indio_dev);
|
||
|
|
|
||
|
|
iio_device_unregister(indio_dev);
|
||
|
|
regulator_disable(adc->reg);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct of_device_id mcp320x_dt_ids[] = {
|
||
|
|
/* NOTE: The use of compatibles with no vendor prefix is deprecated. */
|
||
|
|
{ .compatible = "mcp3001" },
|
||
|
|
{ .compatible = "mcp3002" },
|
||
|
|
{ .compatible = "mcp3004" },
|
||
|
|
{ .compatible = "mcp3008" },
|
||
|
|
{ .compatible = "mcp3201" },
|
||
|
|
{ .compatible = "mcp3202" },
|
||
|
|
{ .compatible = "mcp3204" },
|
||
|
|
{ .compatible = "mcp3208" },
|
||
|
|
{ .compatible = "mcp3301" },
|
||
|
|
{ .compatible = "microchip,mcp3001" },
|
||
|
|
{ .compatible = "microchip,mcp3002" },
|
||
|
|
{ .compatible = "microchip,mcp3004" },
|
||
|
|
{ .compatible = "microchip,mcp3008" },
|
||
|
|
{ .compatible = "microchip,mcp3201" },
|
||
|
|
{ .compatible = "microchip,mcp3202" },
|
||
|
|
{ .compatible = "microchip,mcp3204" },
|
||
|
|
{ .compatible = "microchip,mcp3208" },
|
||
|
|
{ .compatible = "microchip,mcp3301" },
|
||
|
|
{ .compatible = "microchip,mcp3550-50" },
|
||
|
|
{ .compatible = "microchip,mcp3550-60" },
|
||
|
|
{ .compatible = "microchip,mcp3551" },
|
||
|
|
{ .compatible = "microchip,mcp3553" },
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, mcp320x_dt_ids);
|
||
|
|
|
||
|
|
static const struct spi_device_id mcp320x_id[] = {
|
||
|
|
{ "mcp3001", mcp3001 },
|
||
|
|
{ "mcp3002", mcp3002 },
|
||
|
|
{ "mcp3004", mcp3004 },
|
||
|
|
{ "mcp3008", mcp3008 },
|
||
|
|
{ "mcp3201", mcp3201 },
|
||
|
|
{ "mcp3202", mcp3202 },
|
||
|
|
{ "mcp3204", mcp3204 },
|
||
|
|
{ "mcp3208", mcp3208 },
|
||
|
|
{ "mcp3301", mcp3301 },
|
||
|
|
{ "mcp3550-50", mcp3550_50 },
|
||
|
|
{ "mcp3550-60", mcp3550_60 },
|
||
|
|
{ "mcp3551", mcp3551 },
|
||
|
|
{ "mcp3553", mcp3553 },
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(spi, mcp320x_id);
|
||
|
|
|
||
|
|
static struct spi_driver mcp320x_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "mcp320x",
|
||
|
|
.of_match_table = mcp320x_dt_ids,
|
||
|
|
},
|
||
|
|
.probe = mcp320x_probe,
|
||
|
|
.remove = mcp320x_remove,
|
||
|
|
.id_table = mcp320x_id,
|
||
|
|
};
|
||
|
|
module_spi_driver(mcp320x_driver);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Oskar Andero <oskar.andero@gmail.com>");
|
||
|
|
MODULE_DESCRIPTION("Microchip Technology MCP3x01/02/04/08 and MCP3550/1/3");
|
||
|
|
MODULE_LICENSE("GPL v2");
|