diff options
Diffstat (limited to 'drivers/iio/potentiometer')
-rw-r--r-- | drivers/iio/potentiometer/Kconfig | 10 | ||||
-rw-r--r-- | drivers/iio/potentiometer/Makefile | 1 | ||||
-rw-r--r-- | drivers/iio/potentiometer/ad5110.c | 2 | ||||
-rw-r--r-- | drivers/iio/potentiometer/ad5272.c | 2 | ||||
-rw-r--r-- | drivers/iio/potentiometer/ds1803.c | 2 | ||||
-rw-r--r-- | drivers/iio/potentiometer/max5432.c | 2 | ||||
-rw-r--r-- | drivers/iio/potentiometer/mcp4018.c | 2 | ||||
-rw-r--r-- | drivers/iio/potentiometer/mcp4531.c | 2 | ||||
-rw-r--r-- | drivers/iio/potentiometer/tpl0102.c | 2 | ||||
-rw-r--r-- | drivers/iio/potentiometer/x9250.c | 220 |
10 files changed, 238 insertions, 7 deletions
diff --git a/drivers/iio/potentiometer/Kconfig b/drivers/iio/potentiometer/Kconfig index 01dd3f858d99..e6a9a3c67845 100644 --- a/drivers/iio/potentiometer/Kconfig +++ b/drivers/iio/potentiometer/Kconfig @@ -136,4 +136,14 @@ config TPL0102 To compile this driver as a module, choose M here: the module will be called tpl0102. +config X9250 + tristate "Renesas X9250 quad controlled potentiometers" + depends on SPI + help + Enable support for the Renesas X9250 quad controlled + potentiometers. + + To compile this driver as a module, choose M here: the module + will be called x9250. + endmenu diff --git a/drivers/iio/potentiometer/Makefile b/drivers/iio/potentiometer/Makefile index 5ebb8e3bbd76..d11fb739176c 100644 --- a/drivers/iio/potentiometer/Makefile +++ b/drivers/iio/potentiometer/Makefile @@ -15,3 +15,4 @@ obj-$(CONFIG_MCP4131) += mcp4131.o obj-$(CONFIG_MCP4531) += mcp4531.o obj-$(CONFIG_MCP41010) += mcp41010.o obj-$(CONFIG_TPL0102) += tpl0102.o +obj-$(CONFIG_X9250) += x9250.o diff --git a/drivers/iio/potentiometer/ad5110.c b/drivers/iio/potentiometer/ad5110.c index 8fbcce482989..991e745c4f93 100644 --- a/drivers/iio/potentiometer/ad5110.c +++ b/drivers/iio/potentiometer/ad5110.c @@ -334,7 +334,7 @@ static struct i2c_driver ad5110_driver = { .name = "ad5110", .of_match_table = ad5110_of_match, }, - .probe_new = ad5110_probe, + .probe = ad5110_probe, .id_table = ad5110_id, }; module_i2c_driver(ad5110_driver); diff --git a/drivers/iio/potentiometer/ad5272.c b/drivers/iio/potentiometer/ad5272.c index aa140d632101..b17941e4c2f7 100644 --- a/drivers/iio/potentiometer/ad5272.c +++ b/drivers/iio/potentiometer/ad5272.c @@ -218,7 +218,7 @@ static struct i2c_driver ad5272_driver = { .name = "ad5272", .of_match_table = ad5272_dt_ids, }, - .probe_new = ad5272_probe, + .probe = ad5272_probe, .id_table = ad5272_id, }; diff --git a/drivers/iio/potentiometer/ds1803.c b/drivers/iio/potentiometer/ds1803.c index 0b5e475807cb..fc183e0790da 100644 --- a/drivers/iio/potentiometer/ds1803.c +++ b/drivers/iio/potentiometer/ds1803.c @@ -252,7 +252,7 @@ static struct i2c_driver ds1803_driver = { .name = "ds1803", .of_match_table = ds1803_dt_ids, }, - .probe_new = ds1803_probe, + .probe = ds1803_probe, .id_table = ds1803_id, }; diff --git a/drivers/iio/potentiometer/max5432.c b/drivers/iio/potentiometer/max5432.c index 94ef27ef3fb5..c8e2481dadb5 100644 --- a/drivers/iio/potentiometer/max5432.c +++ b/drivers/iio/potentiometer/max5432.c @@ -123,7 +123,7 @@ static struct i2c_driver max5432_driver = { .name = "max5432", .of_match_table = max5432_dt_ids, }, - .probe_new = max5432_probe, + .probe = max5432_probe, }; module_i2c_driver(max5432_driver); diff --git a/drivers/iio/potentiometer/mcp4018.c b/drivers/iio/potentiometer/mcp4018.c index c0e171fec062..89daecc90305 100644 --- a/drivers/iio/potentiometer/mcp4018.c +++ b/drivers/iio/potentiometer/mcp4018.c @@ -174,7 +174,7 @@ static struct i2c_driver mcp4018_driver = { .name = "mcp4018", .of_match_table = mcp4018_of_match, }, - .probe_new = mcp4018_probe, + .probe = mcp4018_probe, .id_table = mcp4018_id, }; diff --git a/drivers/iio/potentiometer/mcp4531.c b/drivers/iio/potentiometer/mcp4531.c index c25f84b4a270..c513c00c8243 100644 --- a/drivers/iio/potentiometer/mcp4531.c +++ b/drivers/iio/potentiometer/mcp4531.c @@ -385,7 +385,7 @@ static struct i2c_driver mcp4531_driver = { .name = "mcp4531", .of_match_table = mcp4531_of_match, }, - .probe_new = mcp4531_probe, + .probe = mcp4531_probe, .id_table = mcp4531_id, }; diff --git a/drivers/iio/potentiometer/tpl0102.c b/drivers/iio/potentiometer/tpl0102.c index a3465b413b0c..8923ccb0fc4f 100644 --- a/drivers/iio/potentiometer/tpl0102.c +++ b/drivers/iio/potentiometer/tpl0102.c @@ -161,7 +161,7 @@ static struct i2c_driver tpl0102_driver = { .driver = { .name = "tpl0102", }, - .probe_new = tpl0102_probe, + .probe = tpl0102_probe, .id_table = tpl0102_id, }; diff --git a/drivers/iio/potentiometer/x9250.c b/drivers/iio/potentiometer/x9250.c new file mode 100644 index 000000000000..735348492699 --- /dev/null +++ b/drivers/iio/potentiometer/x9250.c @@ -0,0 +1,220 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * + * x9250.c -- Renesas X9250 potentiometers IIO driver + * + * Copyright 2023 CS GROUP France + * + * Author: Herve Codina <herve.codina@bootlin.com> + */ + +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/iio/iio.h> +#include <linux/limits.h> +#include <linux/module.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> +#include <linux/spi/spi.h> + +struct x9250_cfg { + const char *name; + int kohms; +}; + +struct x9250 { + struct spi_device *spi; + const struct x9250_cfg *cfg; + struct gpio_desc *wp_gpio; +}; + +#define X9250_ID 0x50 +#define X9250_CMD_RD_WCR(_p) (0x90 | (_p)) +#define X9250_CMD_WR_WCR(_p) (0xa0 | (_p)) + +static int x9250_write8(struct x9250 *x9250, u8 cmd, u8 val) +{ + u8 txbuf[3]; + + txbuf[0] = X9250_ID; + txbuf[1] = cmd; + txbuf[2] = val; + + return spi_write_then_read(x9250->spi, txbuf, ARRAY_SIZE(txbuf), NULL, 0); +} + +static int x9250_read8(struct x9250 *x9250, u8 cmd, u8 *val) +{ + u8 txbuf[2]; + + txbuf[0] = X9250_ID; + txbuf[1] = cmd; + + return spi_write_then_read(x9250->spi, txbuf, ARRAY_SIZE(txbuf), val, 1); +} + +#define X9250_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), \ + .info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_RAW), \ +} + +static const struct iio_chan_spec x9250_channels[] = { + X9250_CHANNEL(0), + X9250_CHANNEL(1), + X9250_CHANNEL(2), + X9250_CHANNEL(3), +}; + +static int x9250_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct x9250 *x9250 = iio_priv(indio_dev); + int ch = chan->channel; + int ret; + u8 v; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = x9250_read8(x9250, X9250_CMD_RD_WCR(ch), &v); + if (ret) + return ret; + *val = v; + return IIO_VAL_INT; + + case IIO_CHAN_INFO_SCALE: + *val = 1000 * x9250->cfg->kohms; + *val2 = U8_MAX; + return IIO_VAL_FRACTIONAL; + } + + return -EINVAL; +} + +static int x9250_read_avail(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, + const int **vals, int *type, int *length, long mask) +{ + static const int range[] = {0, 1, 255}; /* min, step, max */ + + switch (mask) { + case IIO_CHAN_INFO_RAW: + *length = ARRAY_SIZE(range); + *vals = range; + *type = IIO_VAL_INT; + return IIO_AVAIL_RANGE; + } + + return -EINVAL; +} + +static int x9250_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct x9250 *x9250 = iio_priv(indio_dev); + int ch = chan->channel; + int ret; + + if (mask != IIO_CHAN_INFO_RAW) + return -EINVAL; + + if (val > U8_MAX || val < 0) + return -EINVAL; + + gpiod_set_value_cansleep(x9250->wp_gpio, 0); + ret = x9250_write8(x9250, X9250_CMD_WR_WCR(ch), val); + gpiod_set_value_cansleep(x9250->wp_gpio, 1); + + return ret; +} + +static const struct iio_info x9250_info = { + .read_raw = x9250_read_raw, + .read_avail = x9250_read_avail, + .write_raw = x9250_write_raw, +}; + +enum x9250_type { + X9250T, + X9250U, +}; + +static const struct x9250_cfg x9250_cfg[] = { + [X9250T] = { .name = "x9250t", .kohms = 100, }, + [X9250U] = { .name = "x9250u", .kohms = 50, }, +}; + +static const char *const x9250_regulator_names[] = { + "vcc", + "avp", + "avn", +}; + +static int x9250_probe(struct spi_device *spi) +{ + struct iio_dev *indio_dev; + struct x9250 *x9250; + int ret; + + ret = devm_regulator_bulk_get_enable(&spi->dev, ARRAY_SIZE(x9250_regulator_names), + x9250_regulator_names); + if (ret) + return dev_err_probe(&spi->dev, ret, "Failed to get regulators\n"); + + /* + * The x9250 needs a 5ms maximum delay after the power-supplies are set + * before performing the first write (1ms for the first read). + */ + usleep_range(5000, 6000); + + indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*x9250)); + if (!indio_dev) + return -ENOMEM; + + x9250 = iio_priv(indio_dev); + x9250->spi = spi; + x9250->cfg = spi_get_device_match_data(spi); + x9250->wp_gpio = devm_gpiod_get_optional(&spi->dev, "wp", GPIOD_OUT_LOW); + if (IS_ERR(x9250->wp_gpio)) + return dev_err_probe(&spi->dev, PTR_ERR(x9250->wp_gpio), + "failed to get wp gpio\n"); + + indio_dev->info = &x9250_info; + indio_dev->channels = x9250_channels; + indio_dev->num_channels = ARRAY_SIZE(x9250_channels); + indio_dev->name = x9250->cfg->name; + + return devm_iio_device_register(&spi->dev, indio_dev); +} + +static const struct of_device_id x9250_of_match[] = { + { .compatible = "renesas,x9250t", .data = &x9250_cfg[X9250T]}, + { .compatible = "renesas,x9250u", .data = &x9250_cfg[X9250U]}, + { } +}; +MODULE_DEVICE_TABLE(of, x9250_of_match); + +static const struct spi_device_id x9250_id_table[] = { + { "x9250t", (kernel_ulong_t)&x9250_cfg[X9250T] }, + { "x9250u", (kernel_ulong_t)&x9250_cfg[X9250U] }, + { } +}; +MODULE_DEVICE_TABLE(spi, x9250_id_table); + +static struct spi_driver x9250_spi_driver = { + .driver = { + .name = "x9250", + .of_match_table = x9250_of_match, + }, + .id_table = x9250_id_table, + .probe = x9250_probe, +}; + +module_spi_driver(x9250_spi_driver); + +MODULE_AUTHOR("Herve Codina <herve.codina@bootlin.com>"); +MODULE_DESCRIPTION("X9250 ALSA SoC driver"); +MODULE_LICENSE("GPL"); |