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hwmon: (pmbus/lm25066) Add OF device ID table 

The driver doesn't have a struct of_device_id table but supported devices
are registered via Device Trees. This is working on the assumption that a
I2C device registered via OF will always match a legacy I2C device ID and
that the MODALIAS reported will always be of the form i2c:<device>.

But this could change in the future so the correct approach is to have an
OF device ID table if the devices are registered via OF.

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Link: https://lore.kernel.org/r/20210928092242.30036-7-zev@bewilderbeest.net
[groeck: Replaced reference to reasoning with reasoning, fixed checkpatch
 warnings, fixed compile warning comparing of_id->data w/ i2c_id->driver_data]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Zev Weiss 2021-09-28 02:22:40 -07:00 committed by Guenter Roeck
parent df60a5daa7
commit b7792f3ea3
1 changed files with 23 additions and 2 deletions
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23
drivers/hwmon/pmbus/lm25066.c
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@ -14,6 +14,7 @@
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/log2.h>
#include <linux/of_device.h>
#include "pmbus.h"
enum chips { lm25056, lm25066, lm5064, lm5066, lm5066i };
@ -444,12 +445,24 @@ static const struct i2c_device_id lm25066_id[] = {
};
MODULE_DEVICE_TABLE(i2c, lm25066_id);
static const struct of_device_id __maybe_unused lm25066_of_match[] = {
{ .compatible = "ti,lm25056", .data = (void *)lm25056, },
{ .compatible = "ti,lm25066", .data = (void *)lm25066, },
{ .compatible = "ti,lm5064", .data = (void *)lm5064, },
{ .compatible = "ti,lm5066", .data = (void *)lm5066, },
{ .compatible = "ti,lm5066i", .data = (void *)lm5066i, },
{ },
};
MODULE_DEVICE_TABLE(of, lm25066_of_match);
static int lm25066_probe(struct i2c_client *client)
{
int config;
struct lm25066_data *data;
struct pmbus_driver_info *info;
const struct __coeff *coeff;
const struct of_device_id *of_id;
const struct i2c_device_id *i2c_id;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_READ_BYTE_DATA))
@ -464,7 +477,14 @@ static int lm25066_probe(struct i2c_client *client)
if (config < 0)
return config;
data->id = i2c_match_id(lm25066_id, client)->driver_data;
i2c_id = i2c_match_id(lm25066_id, client);
of_id = of_match_device(lm25066_of_match, &client->dev);
if (of_id && (unsigned long)of_id->data != i2c_id->driver_data)
dev_notice(&client->dev, "Device mismatch: %s in device tree, %s detected\n",
of_id->name, i2c_id->name);
data->id = i2c_id->driver_data;
info = &data->info;
info->pages = 1;
@ -521,6 +541,7 @@ static int lm25066_probe(struct i2c_client *client)
static struct i2c_driver lm25066_driver = {
.driver = {
.name = "lm25066",
.of_match_table = of_match_ptr(lm25066_of_match),
},
.probe_new = lm25066_probe,
.id_table = lm25066_id,