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iio: adc: ad4130: introduce chip info for future multidevice support

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Introduce a chip_info structure to abstract device-specific parameters
and prepare the driver for supporting multiple AD4130 family variants.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Santos <Jonathan.Santos@analog.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Jonathan Santos 2026-04-01 08:58:34 -03:00 committed by Jonathan Cameron
parent 2c5ebb7708
commit 71c1a1b376
1 changed files with 30 additions and 10 deletions
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40
drivers/iio/adc/ad4130.c
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@ -224,6 +224,14 @@ enum ad4130_pin_function {
AD4130_PIN_FN_VBIAS = BIT(3),
};
struct ad4130_chip_info {
const char *name;
unsigned int max_analog_pins;
const struct iio_info *info;
const unsigned int *reg_size;
const unsigned int reg_size_length;
};
/*
* If you make adaptations in this struct, you most likely also have to adapt
* ad4130_setup_info_eq(), too.
@ -268,6 +276,7 @@ struct ad4130_state {
struct regmap *regmap;
struct spi_device *spi;
struct clk *mclk;
const struct ad4130_chip_info *chip_info;
struct regulator_bulk_data regulators[4];
u32 irq_trigger;
u32 inv_irq_trigger;
@ -394,10 +403,10 @@ static const char * const ad4130_filter_types_str[] = {
static int ad4130_get_reg_size(struct ad4130_state *st, unsigned int reg,
unsigned int *size)
{
if (reg >= ARRAY_SIZE(ad4130_reg_size))
if (reg >= st->chip_info->reg_size_length)
return -EINVAL;
*size = ad4130_reg_size[reg];
*size = st->chip_info->reg_size[reg];
return 0;
}
@ -1291,6 +1300,14 @@ static const struct iio_info ad4130_info = {
.debugfs_reg_access = ad4130_reg_access,
};
static const struct ad4130_chip_info ad4130_8_chip_info = {
.name = "ad4130-8",
.max_analog_pins = 16,
.info = &ad4130_info,
.reg_size = ad4130_reg_size,
.reg_size_length = ARRAY_SIZE(ad4130_reg_size),
};
static int ad4130_buffer_postenable(struct iio_dev *indio_dev)
{
struct ad4130_state *st = iio_priv(indio_dev);
@ -1504,7 +1521,7 @@ static int ad4130_validate_diff_channel(struct ad4130_state *st, u32 pin)
return dev_err_probe(dev, -EINVAL,
"Invalid differential channel %u\n", pin);
if (pin >= AD4130_MAX_ANALOG_PINS)
if (pin >= st->chip_info->max_analog_pins)
return 0;
if (st->pins_fn[pin] == AD4130_PIN_FN_SPECIAL)
@ -1536,7 +1553,7 @@ static int ad4130_validate_excitation_pin(struct ad4130_state *st, u32 pin)
{
struct device *dev = &st->spi->dev;
if (pin >= AD4130_MAX_ANALOG_PINS)
if (pin >= st->chip_info->max_analog_pins)
return dev_err_probe(dev, -EINVAL,
"Invalid excitation pin %u\n", pin);
@ -1554,7 +1571,7 @@ static int ad4130_validate_vbias_pin(struct ad4130_state *st, u32 pin)
{
struct device *dev = &st->spi->dev;
if (pin >= AD4130_MAX_ANALOG_PINS)
if (pin >= st->chip_info->max_analog_pins)
return dev_err_probe(dev, -EINVAL, "Invalid vbias pin %u\n",
pin);
@ -1730,7 +1747,7 @@ static int ad4310_parse_fw(struct iio_dev *indio_dev)
ret = device_property_count_u32(dev, "adi,vbias-pins");
if (ret > 0) {
if (ret > AD4130_MAX_ANALOG_PINS)
if (ret > st->chip_info->max_analog_pins)
return dev_err_probe(dev, -EINVAL,
"Too many vbias pins %u\n", ret);
@ -1994,6 +2011,8 @@ static int ad4130_probe(struct spi_device *spi)
st = iio_priv(indio_dev);
st->chip_info = device_get_match_data(dev);
memset(st->reset_buf, 0xff, sizeof(st->reset_buf));
init_completion(&st->completion);
mutex_init(&st->lock);
@ -2011,9 +2030,9 @@ static int ad4130_probe(struct spi_device *spi)
spi_message_init_with_transfers(&st->fifo_msg, st->fifo_xfer,
ARRAY_SIZE(st->fifo_xfer));
indio_dev->name = AD4130_NAME;
indio_dev->name = st->chip_info->name;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->info = &ad4130_info;
indio_dev->info = st->chip_info->info;
st->regmap = devm_regmap_init(dev, NULL, st, &ad4130_regmap_config);
if (IS_ERR(st->regmap))
@ -2056,7 +2075,7 @@ static int ad4130_probe(struct spi_device *spi)
ad4130_fill_scale_tbls(st);
st->gc.owner = THIS_MODULE;
st->gc.label = AD4130_NAME;
st->gc.label = st->chip_info->name;
st->gc.base = -1;
st->gc.ngpio = AD4130_MAX_GPIOS;
st->gc.parent = dev;
@ -2104,13 +2123,14 @@ static int ad4130_probe(struct spi_device *spi)
static const struct of_device_id ad4130_of_match[] = {
{
.compatible = "adi,ad4130",
.data = &ad4130_8_chip_info
},
{ }
};
MODULE_DEVICE_TABLE(of, ad4130_of_match);
static const struct spi_device_id ad4130_id_table[] = {
{ "ad4130" },
{ "ad4130", (kernel_ulong_t)&ad4130_8_chip_info },
{ }
};
MODULE_DEVICE_TABLE(spi, ad4130_id_table);