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path: root/drivers/iio/amplifiers
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Diffstat (limited to 'drivers/iio/amplifiers')
-rw-r--r--drivers/iio/amplifiers/ad8366.c8
-rw-r--r--drivers/iio/amplifiers/ada4250.c59
-rw-r--r--drivers/iio/amplifiers/hmc425a.c5
3 files changed, 26 insertions, 46 deletions
diff --git a/drivers/iio/amplifiers/ad8366.c b/drivers/iio/amplifiers/ad8366.c
index 31564afb13a2..d06ac786501c 100644
--- a/drivers/iio/amplifiers/ad8366.c
+++ b/drivers/iio/amplifiers/ad8366.c
@@ -45,7 +45,7 @@ struct ad8366_state {
struct gpio_desc *reset_gpio;
unsigned char ch[2];
enum ad8366_type type;
- struct ad8366_info *info;
+ const struct ad8366_info *info;
/*
* DMA (thus cache coherency maintenance) may require the
* transfer buffers to live in their own cache lines.
@@ -53,7 +53,7 @@ struct ad8366_state {
unsigned char data[2] __aligned(IIO_DMA_MINALIGN);
};
-static struct ad8366_info ad8366_infos[] = {
+static const struct ad8366_info ad8366_infos[] = {
[ID_AD8366] = {
.gain_min = 4500,
.gain_max = 20500,
@@ -163,7 +163,7 @@ static int ad8366_write_raw(struct iio_dev *indio_dev,
long mask)
{
struct ad8366_state *st = iio_priv(indio_dev);
- struct ad8366_info *inf = st->info;
+ const struct ad8366_info *inf = st->info;
int code = 0, gain;
int ret;
@@ -330,7 +330,7 @@ static const struct spi_device_id ad8366_id[] = {
{"adl5240", ID_ADL5240},
{"hmc792a", ID_HMC792},
{"hmc1119", ID_HMC1119},
- {}
+ { }
};
MODULE_DEVICE_TABLE(spi, ad8366_id);
diff --git a/drivers/iio/amplifiers/ada4250.c b/drivers/iio/amplifiers/ada4250.c
index 566f0e1c98a5..40f396ea9069 100644
--- a/drivers/iio/amplifiers/ada4250.c
+++ b/drivers/iio/amplifiers/ada4250.c
@@ -13,8 +13,8 @@
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/spi/spi.h>
-
-#include <linux/unaligned.h>
+#include <linux/types.h>
+#include <linux/units.h>
/* ADA4250 Register Map */
#define ADA4250_REG_GAIN_MUX 0x00
@@ -56,13 +56,14 @@ enum ada4250_current_bias {
struct ada4250_state {
struct spi_device *spi;
struct regmap *regmap;
- struct regulator *reg;
/* Protect against concurrent accesses to the device and data content */
struct mutex lock;
+ int avdd_uv;
+ int offset_uv;
u8 bias;
u8 gain;
- int offset_uv;
bool refbuf_en;
+ __le16 reg_val_16 __aligned(IIO_DMA_MINALIGN);
};
/* ADA4250 Current Bias Source Settings: Disabled, Bandgap Reference, AVDD */
@@ -91,8 +92,7 @@ static int ada4250_set_offset_uv(struct iio_dev *indio_dev,
if (st->bias == 0 || st->bias == 3)
return -EINVAL;
- voltage_v = regulator_get_voltage(st->reg);
- voltage_v = DIV_ROUND_CLOSEST(voltage_v, 1000000);
+ voltage_v = DIV_ROUND_CLOSEST(st->avdd_uv, MICRO);
if (st->bias == ADA4250_BIAS_AVDD)
x[0] = voltage_v;
@@ -292,50 +292,33 @@ static const struct iio_chan_spec ada4250_channels[] = {
}
};
-static void ada4250_reg_disable(void *data)
-{
- regulator_disable(data);
-}
-
static int ada4250_init(struct ada4250_state *st)
{
+ struct device *dev = &st->spi->dev;
int ret;
u16 chip_id;
- u8 data[2] __aligned(8) = {};
- struct spi_device *spi = st->spi;
- st->refbuf_en = device_property_read_bool(&spi->dev, "adi,refbuf-enable");
+ st->refbuf_en = device_property_read_bool(dev, "adi,refbuf-enable");
- st->reg = devm_regulator_get(&spi->dev, "avdd");
- if (IS_ERR(st->reg))
- return dev_err_probe(&spi->dev, PTR_ERR(st->reg),
+ st->avdd_uv = devm_regulator_get_enable_read_voltage(dev, "avdd");
+ if (st->avdd_uv < 0)
+ return dev_err_probe(dev, st->avdd_uv,
"failed to get the AVDD voltage\n");
- ret = regulator_enable(st->reg);
- if (ret) {
- dev_err(&spi->dev, "Failed to enable specified AVDD supply\n");
- return ret;
- }
-
- ret = devm_add_action_or_reset(&spi->dev, ada4250_reg_disable, st->reg);
- if (ret)
- return ret;
-
ret = regmap_write(st->regmap, ADA4250_REG_RESET,
FIELD_PREP(ADA4250_RESET_MSK, 1));
if (ret)
return ret;
- ret = regmap_bulk_read(st->regmap, ADA4250_REG_CHIP_ID, data, 2);
+ ret = regmap_bulk_read(st->regmap, ADA4250_REG_CHIP_ID, &st->reg_val_16,
+ sizeof(st->reg_val_16));
if (ret)
return ret;
- chip_id = get_unaligned_le16(data);
+ chip_id = le16_to_cpu(st->reg_val_16);
- if (chip_id != ADA4250_CHIP_ID) {
- dev_err(&spi->dev, "Invalid chip ID.\n");
- return -EINVAL;
- }
+ if (chip_id != ADA4250_CHIP_ID)
+ dev_info(dev, "Invalid chip ID: 0x%02X.\n", chip_id);
return regmap_write(st->regmap, ADA4250_REG_REFBUF_EN,
FIELD_PREP(ADA4250_REFBUF_MSK, st->refbuf_en));
@@ -368,23 +351,21 @@ static int ada4250_probe(struct spi_device *spi)
mutex_init(&st->lock);
ret = ada4250_init(st);
- if (ret) {
- dev_err(&spi->dev, "ADA4250 init failed\n");
- return ret;
- }
+ if (ret)
+ return dev_err_probe(&spi->dev, ret, "ADA4250 init failed\n");
return devm_iio_device_register(&spi->dev, indio_dev);
}
static const struct spi_device_id ada4250_id[] = {
{ "ada4250", 0 },
- {}
+ { }
};
MODULE_DEVICE_TABLE(spi, ada4250_id);
static const struct of_device_id ada4250_of_match[] = {
{ .compatible = "adi,ada4250" },
- {},
+ { }
};
MODULE_DEVICE_TABLE(of, ada4250_of_match);
diff --git a/drivers/iio/amplifiers/hmc425a.c b/drivers/iio/amplifiers/hmc425a.c
index d9a359e1388a..4dbf894c7e3b 100644
--- a/drivers/iio/amplifiers/hmc425a.c
+++ b/drivers/iio/amplifiers/hmc425a.c
@@ -270,7 +270,7 @@ static const struct iio_chan_spec_ext_info ltc6373_ext_info[] = {
.write = ltc6373_write_powerdown,
.shared = IIO_SEPARATE,
},
- {}
+ { }
};
#define HMC425A_CHAN(_channel) \
@@ -398,7 +398,6 @@ static int hmc425a_probe(struct platform_device *pdev)
return devm_iio_device_register(&pdev->dev, indio_dev);
}
-/* Match table for of_platform binding */
static const struct of_device_id hmc425a_of_match[] = {
{ .compatible = "adi,hmc425a",
.data = &hmc425a_chip_info_tbl[ID_HMC425A]},
@@ -408,7 +407,7 @@ static const struct of_device_id hmc425a_of_match[] = {
.data = &hmc425a_chip_info_tbl[ID_ADRF5740]},
{ .compatible = "adi,ltc6373",
.data = &hmc425a_chip_info_tbl[ID_LTC6373]},
- {}
+ { }
};
MODULE_DEVICE_TABLE(of, hmc425a_of_match);
generated by cgit (git 2.34.1) at 2025-07-30 16:38:22 +0000