[PATCH v2 1/1] iio: chemical: atlas-ezo-sensor: Make use of device properties

From: Andy Shevchenko
Date: Thu Feb 03 2022 - 11:27:19 EST


Convert the module to be property provider agnostic and allow
it to be used on non-OF platforms.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
v2: fixed castings and qualifiers (LKP)
drivers/iio/chemical/atlas-ezo-sensor.c | 44 +++++++++++--------------
1 file changed, 20 insertions(+), 24 deletions(-)

diff --git a/drivers/iio/chemical/atlas-ezo-sensor.c b/drivers/iio/chemical/atlas-ezo-sensor.c
index b1bacfe3c3ce..3f3ea479b474 100644
--- a/drivers/iio/chemical/atlas-ezo-sensor.c
+++ b/drivers/iio/chemical/atlas-ezo-sensor.c
@@ -6,25 +6,21 @@
* Author: Matt Ranostay <matt.ranostay@xxxxxxxxxxxx>
*/

-#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
#include <linux/mutex.h>
+#include <linux/property.h>
#include <linux/err.h>
#include <linux/i2c.h>
-#include <linux/of_device.h>
+
#include <linux/iio/iio.h>

#define ATLAS_EZO_DRV_NAME "atlas-ezo-sensor"
#define ATLAS_INT_TIME_IN_MS 950
#define ATLAS_INT_HUM_TIME_IN_MS 350

-enum {
- ATLAS_CO2_EZO,
- ATLAS_O2_EZO,
- ATLAS_HUM_EZO,
-};
-
struct atlas_ezo_device {
const struct iio_chan_spec *channels;
int num_channels;
@@ -33,7 +29,7 @@ struct atlas_ezo_device {

struct atlas_ezo_data {
struct i2c_client *client;
- struct atlas_ezo_device *chip;
+ const struct atlas_ezo_device *chip;

/* lock to avoid multiple concurrent read calls */
struct mutex lock;
@@ -81,17 +77,17 @@ static const struct iio_chan_spec atlas_hum_ezo_channels[] = {
};

static struct atlas_ezo_device atlas_ezo_devices[] = {
- [ATLAS_CO2_EZO] = {
+ [0] = {
.channels = atlas_co2_ezo_channels,
.num_channels = 1,
.delay = ATLAS_INT_TIME_IN_MS,
},
- [ATLAS_O2_EZO] = {
+ [1] = {
.channels = atlas_o2_ezo_channels,
.num_channels = 1,
.delay = ATLAS_INT_TIME_IN_MS,
},
- [ATLAS_HUM_EZO] = {
+ [2] = {
.channels = atlas_hum_ezo_channels,
.num_channels = 1,
.delay = ATLAS_INT_HUM_TIME_IN_MS,
@@ -184,17 +180,17 @@ static const struct iio_info atlas_info = {
};

static const struct i2c_device_id atlas_ezo_id[] = {
- { "atlas-co2-ezo", ATLAS_CO2_EZO },
- { "atlas-o2-ezo", ATLAS_O2_EZO },
- { "atlas-hum-ezo", ATLAS_HUM_EZO },
+ { "atlas-co2-ezo", (kernel_ulong_t)&atlas_ezo_devices[0] },
+ { "atlas-o2-ezo", (kernel_ulong_t)&atlas_ezo_devices[1] },
+ { "atlas-hum-ezo", (kernel_ulong_t)&atlas_ezo_devices[2] },
{}
};
MODULE_DEVICE_TABLE(i2c, atlas_ezo_id);

static const struct of_device_id atlas_ezo_dt_ids[] = {
- { .compatible = "atlas,co2-ezo", .data = (void *)ATLAS_CO2_EZO, },
- { .compatible = "atlas,o2-ezo", .data = (void *)ATLAS_O2_EZO, },
- { .compatible = "atlas,hum-ezo", .data = (void *)ATLAS_HUM_EZO, },
+ { .compatible = "atlas,co2-ezo", .data = &atlas_ezo_devices[0], },
+ { .compatible = "atlas,o2-ezo", .data = &atlas_ezo_devices[1], },
+ { .compatible = "atlas,hum-ezo", .data = &atlas_ezo_devices[2], },
{}
};
MODULE_DEVICE_TABLE(of, atlas_ezo_dt_ids);
@@ -202,20 +198,20 @@ MODULE_DEVICE_TABLE(of, atlas_ezo_dt_ids);
static int atlas_ezo_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
+ const struct atlas_ezo_device *chip;
struct atlas_ezo_data *data;
- struct atlas_ezo_device *chip;
- const struct of_device_id *of_id;
struct iio_dev *indio_dev;

indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
if (!indio_dev)
return -ENOMEM;

- of_id = of_match_device(atlas_ezo_dt_ids, &client->dev);
- if (!of_id)
- chip = &atlas_ezo_devices[id->driver_data];
+ if (dev_fwnode(&client->dev))
+ chip = device_get_match_data(&client->dev);
else
- chip = &atlas_ezo_devices[(unsigned long)of_id->data];
+ chip = (const struct atlas_ezo_device *)id->driver_data;
+ if (!chip)
+ return -EINVAL;

indio_dev->info = &atlas_info;
indio_dev->name = ATLAS_EZO_DRV_NAME;
--
2.34.1