[PATCH v4 09/11] iio: amplifiers: ad8366: add device tree support

Rodrigo Alencar via B4 Relay
2026-02-10T19:42:18Z

From: Rodrigo Alencar <rodrigo.alencar@analog.com>

Drop the enum ID, split chip info table into per-device structs
and add of_match_table.

Signed-off-by: Rodrigo Alencar <rodrigo.alencar@analog.com>
---
drivers/iio/amplifiers/ad8366.c | 100 +++++++++++++++++++++-------------------
1 file changed, 53 insertions(+), 47 deletions(-)

diff --git a/drivers/iio/amplifiers/ad8366.c b/drivers/iio/amplifiers/ad8366.c
index 1ae75643e89b..79fb3119d794 100644
--- a/drivers/iio/amplifiers/ad8366.c
+++ b/drivers/iio/amplifiers/ad8366.c
@@ -14,6 +14,7 @@
#include <linux/bitrev.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
+#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/regulator/consumer.h>
@@ -23,14 +24,6 @@

#include <linux/iio/iio.h>

-enum ad8366_type {
- ID_AD8366,
- ID_ADA4961,
- ID_ADL5240,
- ID_HMC792,
- ID_HMC1119,
-};
-
struct ad8366_state;

struct ad8366_info {
@@ -62,38 +55,40 @@ static size_t ad8366_pack_code(struct ad8366_state *st)
return sizeof(__be16);
}

-static const struct ad8366_info ad8366_infos[] = {
- [ID_AD8366] = {
- .gain_min = 4500,
- .gain_max = 20500,
- .gain_step = 253,
- .num_channels = 2,
- .pack_code = ad8366_pack_code,
- },
- [ID_ADA4961] = {
- .gain_min = -6000,
- .gain_max = 15000,
- .gain_step = -1000,
- .num_channels = 1,
- },
- [ID_ADL5240] = {
- .gain_min = -11500,
- .gain_max = 20000,
- .gain_step = 500,
- .num_channels = 1,
- },
- [ID_HMC792] = {
- .gain_min = -15750,
- .gain_max = 0,
- .gain_step = 250,
- .num_channels = 1,
- },
- [ID_HMC1119] = {
- .gain_min = -31750,
- .gain_max = 0,
- .gain_step = -250,
- .num_channels = 1,
- },
+static const struct ad8366_info ad8366_chip_info = {
+ .gain_min = 4500,
+ .gain_max = 20500,
+ .gain_step = 253,
+ .num_channels = 2,
+ .pack_code = ad8366_pack_code,
+};
+
+static const struct ad8366_info ada4961_chip_info = {
+ .gain_min = -6000,
+ .gain_max = 15000,
+ .gain_step = -1000,
+ .num_channels = 1,
+};
+
+static const struct ad8366_info adl5240_chip_info = {
+ .gain_min = -11500,
+ .gain_max = 20000,
+ .gain_step = 500,
+ .num_channels = 1,
+};
+
+static const struct ad8366_info hmc792_chip_info = {
+ .gain_min = -15750,
+ .gain_max = 0,
+ .gain_step = 250,
+ .num_channels = 1,
+};
+
+static const struct ad8366_info hmc1119_chip_info = {
+ .gain_min = -31750,
+ .gain_max = 0,
+ .gain_step = -250,
+ .num_channels = 1,
};

static int ad8366_write_code(struct ad8366_state *st)
@@ -229,7 +224,7 @@ static int ad8366_probe(struct spi_device *spi)
return dev_err_probe(dev, ret, "Failed to get regulator\n");

st->spi = spi;
- st->info = &ad8366_infos[spi_get_device_id(spi)->driver_data];
+ st->info = spi_get_device_match_data(spi);

rstc = devm_reset_control_get_optional_exclusive_deasserted(dev, NULL);
if (IS_ERR(rstc))
@@ -250,18 +245,29 @@ static int ad8366_probe(struct spi_device *spi)
}

static const struct spi_device_id ad8366_id[] = {
- {"ad8366", ID_AD8366},
- {"ada4961", ID_ADA4961},
- {"adl5240", ID_ADL5240},
- {"hmc792a", ID_HMC792},
- {"hmc1119", ID_HMC1119},
+ {"ad8366", (kernel_ulong_t)&ad8366_chip_info},
+ {"ada4961", (kernel_ulong_t)&ada4961_chip_info},
+ {"adl5240", (kernel_ulong_t)&adl5240_chip_info},
+ {"hmc792a", (kernel_ulong_t)&hmc792_chip_info},
+ {"hmc1119", (kernel_ulong_t)&hmc1119_chip_info},
{ }
};
MODULE_DEVICE_TABLE(spi, ad8366_id);

+static const struct of_device_id ad8366_of_match[] = {
+ { .compatible = "adi,ad8366", .data = &ad8366_chip_info },
+ { .compatible = "adi,ada4961", .data = &ada4961_chip_info },
+ { .compatible = "adi,adl5240", .data = &adl5240_chip_info },
+ { .compatible = "adi,hmc792a", .data = &hmc792_chip_info },
+ { .compatible = "adi,hmc1119", .data = &hmc1119_chip_info },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ad8366_of_match);
+
static struct spi_driver ad8366_driver = {
.driver = {
- .name = KBUILD_MODNAME,
+ .name = KBUILD_MODNAME,
+ .of_match_table = ad8366_of_match,
},
.probe = ad8366_probe,
.id_table = ad8366_id,

--
2.43.0