On 19/03/16 13:48, Peter Meerwald-Stadler wrote: > >> The following functionalities are supported: >> - write, read from volatile memory >> >> Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/22060b.pdf > > comments below A few more little bits from me. Mostly looking good though.
Jonathan > >> Signed-off-by: Slawomir Stepien <[email protected]> >> --- >> This is v2 of patch: "iio: add driver for Microchip MCP414X/416X/424X/426X" >> >> Changes since v1: >> - One line summary changed >> - Fixed module name and OF compatible >> - Based code on Peter Rosin's code from mcp4531.c >> - No additional sysfs attributes >> - Deleted not used devid struct memeber >> - Changed mcp4131_exec function arguments: >> - write value is now u16 >> - no need to pass return buffer array - rx array from mcp4131_data is used >> - Added missing new line characters to dev_info >> --- >> .../bindings/iio/potentiometer/mcp4131.txt | 84 ++++ >> drivers/iio/potentiometer/Kconfig | 18 + >> drivers/iio/potentiometer/Makefile | 1 + >> drivers/iio/potentiometer/mcp4131.c | 523 >> +++++++++++++++++++++ >> 4 files changed, 626 insertions(+) >> create mode 100644 >> Documentation/devicetree/bindings/iio/potentiometer/mcp4131.txt >> create mode 100644 drivers/iio/potentiometer/mcp4131.c >> >> diff --git a/Documentation/devicetree/bindings/iio/potentiometer/mcp4131.txt >> b/Documentation/devicetree/bindings/iio/potentiometer/mcp4131.txt >> new file mode 100644 >> index 0000000..3ccba16 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/iio/potentiometer/mcp4131.txt >> @@ -0,0 +1,84 @@ >> +* 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>; >> +}; >> diff --git a/drivers/iio/potentiometer/Kconfig >> b/drivers/iio/potentiometer/Kconfig >> index fd75db7..5ef181a 100644 >> --- a/drivers/iio/potentiometer/Kconfig >> +++ b/drivers/iio/potentiometer/Kconfig >> @@ -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 >> diff --git a/drivers/iio/potentiometer/Makefile >> b/drivers/iio/potentiometer/Makefile >> index 8afe492..cd5c80b 100644 >> --- a/drivers/iio/potentiometer/Makefile >> +++ b/drivers/iio/potentiometer/Makefile >> @@ -3,4 +3,5 @@ >> # >> >> # When adding new entries keep the list in alphabetical order >> +obj-$(CONFIG_MCP4131) += mcp4131.o >> obj-$(CONFIG_MCP4531) += mcp4531.o >> diff --git a/drivers/iio/potentiometer/mcp4131.c >> b/drivers/iio/potentiometer/mcp4131.c >> new file mode 100644 >> index 0000000..3553c9e >> --- /dev/null >> +++ b/drivers/iio/potentiometer/mcp4131.c >> @@ -0,0 +1,523 @@ >> +/* >> + * 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/module.h> >> +#include <linux/spi/spi.h> >> +#include <linux/err.h> >> + >> +#include <linux/iio/iio.h> >> + >> +#define MCP4131_WRITE (0x00 << 2) >> +#define MCP4131_READ (0x03 << 2) >> + >> +#define MCP4131_WIPER_SHIFT (4) > > () not needed > >> +#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; This is only used to lookup elements of your cfg array, I'd just have a pointer to the relevant element of that array in here instead. struct mcp4131_cfg *cfg; and in probe do data->cfg = &mcp4131_cfg[id]; >> + unsigned long devid; >> + struct mutex lock; >> + u8 tx[2], rx[2]; > > alignment requirements for SPI transfer? By which he means put them at the end of this structure and mark the with __cacheline_aligned. It's not technically about alignment but rather about ensuring nothing else is in the cacheline which will on some spi devices be scrubbed when a transaction occurs. > >> + struct spi_transfer xfer; >> + struct spi_message msg; >> +}; >> + >> +#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_exec(struct mcp4131_data *data, >> + u8 addr, u8 cmd, >> + u16 val) >> +{ >> + int err; >> + struct spi_device *spi = data->spi; >> + >> + data->rx[0] = 0; >> + data->rx[1] = 0; > > initialization needed? > > setup of data->xfer + data->tx is done outside the lock, this seems wrong agreed. > >> + >> + switch (cmd) { >> + case MCP4131_READ: >> + data->xfer.len = 2; /* Two bytes transfer for this command */ >> + data->tx[0] = (addr << MCP4131_WIPER_SHIFT) | MCP4131_READ; >> + data->tx[1] = 0; >> + break; >> + >> + case MCP4131_WRITE: >> + data->xfer.len = 2; >> + data->tx[0] = (addr << MCP4131_WIPER_SHIFT) | >> + MCP4131_WRITE | (val >> 8); >> + data->tx[1] = val & 0xFF; /* 8 bits here */ >> + break; >> + >> + default: >> + return -EINVAL; >> + } >> + >> + dev_dbg(&spi->dev, "mcp4131_exec: tx0: 0x%x tx1: 0x%x\n", >> + data->tx[0], data->tx[1]); >> + >> + mutex_lock(&data->lock); >> + spi_message_init(&data->msg); >> + spi_message_add_tail(&data->xfer, &data->msg); >> + >> + err = spi_sync(spi, &data->msg); >> + if (err) { >> + dev_err(&spi->dev, "spi_sync(): %d\n", err); >> + mutex_unlock(&data->lock); >> + return err; >> + } >> + mutex_unlock(&data->lock); >> + >> + dev_dbg(&spi->dev, "mcp4131_exec: rx0: 0x%x rx1: 0x%x\n", >> + data->rx[0], data->rx[1]); >> + >> + return 0; >> +} >> + >> +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: >> + err = mcp4131_exec(data, address, MCP4131_READ, 0); >> + if (err) >> + return err; >> + >> + /* Error, bad address/command combination */ >> + if (!MCP4131_CMDERR(data->rx)) >> + return -EIO; >> + >> + *val = MCP4131_RAW(data->rx); >> + return IIO_VAL_INT; >> + >> + case IIO_CHAN_INFO_SCALE: Now I'd change the way you are doing this slightly so that you have data->cfg pointing to mcp4131[data->devid]. Moves the 'what part am I?' question to a single place in the probe function giving slightly cleaner code. >> + *val = 1000 * mcp4131_cfg[data->devid].kohms; >> + *val2 = mcp4131_cfg[data->devid].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) >> +{ >> + struct mcp4131_data *data = iio_priv(indio_dev); >> + int address = chan->channel << MCP4131_WIPER_SHIFT; >> + >> + switch (mask) { >> + case IIO_CHAN_INFO_RAW: >> + if (val > mcp4131_cfg[data->devid].max_pos || val < 0) >> + return -EINVAL; >> + break; >> + default: >> + return -EINVAL; >> + } >> + >> + return mcp4131_exec(data, address, MCP4131_WRITE, val); >> +} >> + >> +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->devid = devid; >> + >> + data->xfer.tx_buf = data->tx; >> + data->xfer.rx_buf = data->rx; >> + >> + mutex_init(&data->lock); >> + >> + indio_dev->dev.parent = dev; >> + indio_dev->info = &mcp4131_info; >> + indio_dev->channels = mcp4131_channels; >> + indio_dev->num_channels = mcp4131_cfg[devid].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; >> + } >> + >> + dev_info(&spi->dev, "Registered %s\n", indio_dev->name); > > I'd rather drop this message Agreed, adds noise and it's easy to check if the register succeeded anyway by just looking to see if the device is there in sysfs. > >> + >> + return 0; >> +} >> + >> +static int mcp4131_remove(struct spi_device *spi) >> +{ >> + struct iio_dev *indio_dev = spi_get_drvdata(spi); >> + struct mcp4131_data *data = iio_priv(indio_dev); >> + >> + mutex_destroy(&data->lock); > > no need to call Hmm. This is an oddity, the mutex_destroy exists to aid in debugging locking issues by explicity marking the mutex as do not use - iff the mutex debugging is enabled. In this case the storage is promptly deleted anyway so any attempt to use the mutex would result in a null pointer dereference anyway. Hence probably not worth having it here. > >> + devm_iio_device_unregister(&spi->dev, indio_dev); > > don't call this explicitly, it is done automatically after _remove > >> + >> + dev_info(&spi->dev, "Unregistered %s\n", indio_dev->name); > > don't > > I think the entire _remove can be removed > >> + >> + 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, >> + .remove = mcp4131_remove, >> + .id_table = mcp4131_id, >> +}; >> + >> +module_spi_driver(mcp4131_driver); >> + >> +MODULE_AUTHOR("Slawomir Stepien <[email protected]>"); >> +MODULE_DESCRIPTION("MCP4131 digital potentiometer"); >> +MODULE_LICENSE("GPL v2"); >> >
