hwmon: (adt7475) 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: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/adt7475.c b/drivers/hwmon/adt7475.c
index c646670..fcfa482 100644 (file)
--- a/drivers/hwmon/adt7475.c
+++ b/drivers/hwmon/adt7475.c
@@ -13,6 +13,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/of_device.h>
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/i2c.h>
@@ -161,6 +162,27 @@ static const struct i2c_device_id adt7475_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, adt7475_id);
 
+static const struct of_device_id adt7475_of_match[] = {
+       {
+               .compatible = "adi,adt7473",
+               .data = (void *)adt7473
+       },
+       {
+               .compatible = "adi,adt7475",
+               .data = (void *)adt7475
+       },
+       {
+               .compatible = "adi,adt7476",
+               .data = (void *)adt7476
+       },
+       {
+               .compatible = "adi,adt7490",
+               .data = (void *)adt7490
+       },
+       { },
+};
+MODULE_DEVICE_TABLE(of, adt7475_of_match);
+
 struct adt7475_data {
        struct device *hwmon_dev;
        struct mutex lock;
@@ -1250,6 +1272,7 @@ static void adt7475_remove_files(struct i2c_client *client,
 static int adt7475_probe(struct i2c_client *client,
                         const struct i2c_device_id *id)
 {
+       enum chips chip;
        static const char * const names[] = {
                [adt7473] = "ADT7473",
                [adt7475] = "ADT7475",
@@ -1268,8 +1291,13 @@ static int adt7475_probe(struct i2c_client *client,
        mutex_init(&data->lock);
        i2c_set_clientdata(client, data);
 
+       if (client->dev.of_node)
+               chip = (enum chips)of_device_get_match_data(&client->dev);
+       else
+               chip = id->driver_data;
+
        /* Initialize device-specific values */
-       switch (id->driver_data) {
+       switch (chip) {
        case adt7476:
                data->has_voltage = 0x0e;       /* in1 to in3 */
                revision = adt7475_read(REG_DEVID2) & 0x07;
@@ -1428,6 +1456,7 @@ static struct i2c_driver adt7475_driver = {
        .class          = I2C_CLASS_HWMON,
        .driver = {
                .name   = "adt7475",
+               .of_match_table = of_match_ptr(adt7475_of_match),
        },
        .probe          = adt7475_probe,
        .remove         = adt7475_remove,