[PATCH v3 1/2] iio: accel: adxl345: Convert enum->pointer for data in match data table

From: Biju Das
Date: Sun Sep 03 2023 - 05:11:47 EST

Convert enum->pointer for data in match data table, so that
device_get_match_data() can do match against OF/ACPI/I2C tables, once i2c
bus type match support added to it.

Add struct adxl345_chip_info and replace enum->adxl345_chip_info in the
match table and simplify adxl345_probe().

Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
v2->v3:
* Replaced struct adxl3x5_chip_info->struct adxl345_chip_info.
v1->v2:
* Replaced EINVAL->ENODEV for invalid chip type.
* Kept leading commas for adxl345_*_info and adxl375_*_info.
* Restored switch statement in adxl345_core_probe()
---
drivers/iio/accel/adxl345.h | 5 +++++
drivers/iio/accel/adxl345_core.c | 24 ++++++------------------
drivers/iio/accel/adxl345_i2c.c | 20 +++++++++++++++-----
drivers/iio/accel/adxl345_spi.c | 20 +++++++++++++++-----
4 files changed, 41 insertions(+), 28 deletions(-)

diff --git a/drivers/iio/accel/adxl345.h b/drivers/iio/accel/adxl345.h
index d7e67cb08538..826e0575ae79 100644
--- a/drivers/iio/accel/adxl345.h
+++ b/drivers/iio/accel/adxl345.h
@@ -13,6 +13,11 @@ enum adxl345_device_type {
ADXL375 = 2,
};

+struct adxl345_chip_info {
+ const char *name;
+ unsigned int type;
+};
+
int adxl345_core_probe(struct device *dev, struct regmap *regmap);

#endif /* _ADXL345_H_ */
diff --git a/drivers/iio/accel/adxl345_core.c b/drivers/iio/accel/adxl345_core.c
index 1919e0089c11..28f77b5de47d 100644
--- a/drivers/iio/accel/adxl345_core.c
+++ b/drivers/iio/accel/adxl345_core.c
@@ -61,9 +61,9 @@ static const int adxl345_uscale = 38300;
static const int adxl375_uscale = 480000;

struct adxl345_data {
+ const struct adxl345_chip_info *info;
struct regmap *regmap;
u8 data_range;
- enum adxl345_device_type type;
};

#define ADXL345_CHANNEL(index, axis) { \
@@ -110,7 +110,7 @@ static int adxl345_read_raw(struct iio_dev *indio_dev,
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
*val = 0;
- switch (data->type) {
+ switch (data->info->type) {
case ADXL345:
*val2 = adxl345_uscale;
break;
@@ -222,25 +222,11 @@ static void adxl345_powerdown(void *regmap)

int adxl345_core_probe(struct device *dev, struct regmap *regmap)
{
- enum adxl345_device_type type;
struct adxl345_data *data;
struct iio_dev *indio_dev;
- const char *name;
u32 regval;
int ret;

- type = (uintptr_t)device_get_match_data(dev);
- switch (type) {
- case ADXL345:
- name = "adxl345";
- break;
- case ADXL375:
- name = "adxl375";
- break;
- default:
- return -EINVAL;
- }
-
ret = regmap_read(regmap, ADXL345_REG_DEVID, &regval);
if (ret < 0)
return dev_err_probe(dev, ret, "Error reading device ID\n");
@@ -255,16 +241,18 @@ int adxl345_core_probe(struct device *dev, struct regmap *regmap)

data = iio_priv(indio_dev);
data->regmap = regmap;
- data->type = type;
/* Enable full-resolution mode */
data->data_range = ADXL345_DATA_FORMAT_FULL_RES;
+ data->info = device_get_match_data(dev);
+ if (!data->info)
+ return -ENODEV;

ret = regmap_write(data->regmap, ADXL345_REG_DATA_FORMAT,
data->data_range);
if (ret < 0)
return dev_err_probe(dev, ret, "Failed to set data range\n");

- indio_dev->name = name;
+ indio_dev->name = data->info->name;
indio_dev->info = &adxl345_info;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = adxl345_channels;
diff --git a/drivers/iio/accel/adxl345_i2c.c b/drivers/iio/accel/adxl345_i2c.c
index e47d12f19602..8cb6254297f7 100644
--- a/drivers/iio/accel/adxl345_i2c.c
+++ b/drivers/iio/accel/adxl345_i2c.c
@@ -30,22 +30,32 @@ static int adxl345_i2c_probe(struct i2c_client *client)
return adxl345_core_probe(&client->dev, regmap);
}

+static const struct adxl345_chip_info adxl345_i2c_info = {
+ .name = "adxl345",
+ .type = ADXL345,
+};
+
+static const struct adxl345_chip_info adxl375_i2c_info = {
+ .name = "adxl375",
+ .type = ADXL375,
+};
+
static const struct i2c_device_id adxl345_i2c_id[] = {
- { "adxl345", ADXL345 },
- { "adxl375", ADXL375 },
+ { "adxl345", (kernel_ulong_t)&adxl345_i2c_info },
+ { "adxl375", (kernel_ulong_t)&adxl375_i2c_info },
{ }
};
MODULE_DEVICE_TABLE(i2c, adxl345_i2c_id);

static const struct of_device_id adxl345_of_match[] = {
- { .compatible = "adi,adxl345", .data = (const void *)ADXL345 },
- { .compatible = "adi,adxl375", .data = (const void *)ADXL375 },
+ { .compatible = "adi,adxl345", .data = &adxl345_i2c_info },
+ { .compatible = "adi,adxl375", .data = &adxl375_i2c_info },
{ }
};
MODULE_DEVICE_TABLE(of, adxl345_of_match);

static const struct acpi_device_id adxl345_acpi_match[] = {
- { "ADS0345", ADXL345 },
+ { "ADS0345", (kernel_ulong_t)&adxl345_i2c_info },
{ }
};
MODULE_DEVICE_TABLE(acpi, adxl345_acpi_match);
diff --git a/drivers/iio/accel/adxl345_spi.c b/drivers/iio/accel/adxl345_spi.c
index aaade5808657..ede9b9496158 100644
--- a/drivers/iio/accel/adxl345_spi.c
+++ b/drivers/iio/accel/adxl345_spi.c
@@ -36,22 +36,32 @@ static int adxl345_spi_probe(struct spi_device *spi)
return adxl345_core_probe(&spi->dev, regmap);
}

+static const struct adxl345_chip_info adxl345_spi_info = {
+ .name = "adxl345",
+ .type = ADXL345,
+};
+
+static const struct adxl345_chip_info adxl375_spi_info = {
+ .name = "adxl375",
+ .type = ADXL375,
+};
+
static const struct spi_device_id adxl345_spi_id[] = {
- { "adxl345", ADXL345 },
- { "adxl375", ADXL375 },
+ { "adxl345", (kernel_ulong_t)&adxl345_spi_info },
+ { "adxl375", (kernel_ulong_t)&adxl375_spi_info },
{ }
};
MODULE_DEVICE_TABLE(spi, adxl345_spi_id);

static const struct of_device_id adxl345_of_match[] = {
- { .compatible = "adi,adxl345", .data = (const void *)ADXL345 },
- { .compatible = "adi,adxl375", .data = (const void *)ADXL375 },
+ { .compatible = "adi,adxl345", .data = &adxl345_spi_info },
+ { .compatible = "adi,adxl375", .data = &adxl375_spi_info },
{ }
};
MODULE_DEVICE_TABLE(of, adxl345_of_match);

static const struct acpi_device_id adxl345_acpi_match[] = {
- { "ADS0345", ADXL345 },
+ { "ADS0345", (kernel_ulong_t)&adxl345_spi_info },
{ }
};
MODULE_DEVICE_TABLE(acpi, adxl345_acpi_match);
--
2.25.1