drivers/gpio: use simple i2c probe

All these drivers have an i2c probe function which doesn't use the
"struct i2c_device_id *id" parameter, so they can trivially be
converted to the "probe_new" style of probe with a single argument.

This is part of an ongoing transition to single-argument i2c probe
functions. Old-style probe functions involve a call to i2c_match_id:
in drivers/i2c/i2c-core-base.c,

         /*
          * When there are no more users of probe(),
          * rename probe_new to probe.
          */
         if (driver->probe_new)
                 status = driver->probe_new(client);
         else if (driver->probe)
                 status = driver->probe(client,
                                        i2c_match_id(driver->id_table, client));
         else
                 status = -EINVAL;

Drivers which don't need the second parameter can be declared using
probe_new instead, avoiding the call to i2c_match_id. Drivers which do
can still be converted to probe_new-style, calling i2c_match_id
themselves (as is done currently for of_match_id).

This change was done using the following Coccinelle script, and fixed
up for whitespace changes:

@ rule1 @
identifier fn;
identifier client, id;
@@

- static int fn(struct i2c_client *client, const struct i2c_device_id *id)
+ static int fn(struct i2c_client *client)
{
...when != id
}

@ rule2 depends on rule1 @
identifier rule1.fn;
identifier driver;
@@

struct i2c_driver driver = {
-       .probe
+       .probe_new
                =
(
                   fn
|
-                  &fn
+                  fn
)
                ,
};

Signed-off-by: Stephen Kitt <steve@sk2.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/gpio/gpio-max7300.c b/drivers/gpio/gpio-max7300.c
index 43da381a4d7e..cf482f4f0098 100644
--- a/drivers/gpio/gpio-max7300.c
+++ b/drivers/gpio/gpio-max7300.c
@@ -28,8 +28,7 @@ static int max7300_i2c_read(struct device *dev, unsigned int reg)
 	return i2c_smbus_read_byte_data(client, reg);
 }
 
-static int max7300_probe(struct i2c_client *client,
-			 const struct i2c_device_id *id)
+static int max7300_probe(struct i2c_client *client)
 {
 	struct max7301 *ts;
 
@@ -63,7 +62,7 @@ static struct i2c_driver max7300_driver = {
 	.driver = {
 		.name = "max7300",
 	},
-	.probe = max7300_probe,
+	.probe_new = max7300_probe,
 	.remove = max7300_remove,
 	.id_table = max7300_id,
 };