linux-kernel - Re: [PATCH] drivers/extcon: use simple i2c probe

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Date:   Thu, 13 Oct 2022 04:46:16 +0900
From:   Chanwoo Choi <cwchoi00@...il.com>
To:     Stephen Kitt <steve@....org>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers/extcon: use simple i2c probe

Hi,

Looks good to me. Could you change the patch title as following:
-  extcon: Use simple i2c probe

On 22. 10. 12. 23:18, Stephen Kitt wrote:
> 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@....org>
> ---
>  drivers/extcon/extcon-fsa9480.c      | 5 ++---
>  drivers/extcon/extcon-rt8973a.c      | 5 ++---
>  drivers/extcon/extcon-usbc-tusb320.c | 5 ++---
>  3 files changed, 6 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/extcon/extcon-fsa9480.c b/drivers/extcon/extcon-fsa9480.c
> index 7cff66c29907..e8b2671eb29b 100644
> --- a/drivers/extcon/extcon-fsa9480.c
> +++ b/drivers/extcon/extcon-fsa9480.c
> @@ -257,8 +257,7 @@ static irqreturn_t fsa9480_irq_handler(int irq, void *data)
>  	return IRQ_HANDLED;
>  }
>  
> -static int fsa9480_probe(struct i2c_client *client,
> -			 const struct i2c_device_id *id)
> +static int fsa9480_probe(struct i2c_client *client)
>  {
>  	struct fsa9480_usbsw *info;
>  	int ret;
> @@ -370,7 +369,7 @@ static struct i2c_driver fsa9480_i2c_driver = {
>  		.pm		= &fsa9480_pm_ops,
>  		.of_match_table = fsa9480_of_match,
>  	},
> -	.probe			= fsa9480_probe,
> +	.probe_new		= fsa9480_probe,
>  	.id_table		= fsa9480_id,
>  };
>  
> diff --git a/drivers/extcon/extcon-rt8973a.c b/drivers/extcon/extcon-rt8973a.c
> index e6e448f6ea2f..afc9b405d103 100644
> --- a/drivers/extcon/extcon-rt8973a.c
> +++ b/drivers/extcon/extcon-rt8973a.c
> @@ -548,8 +548,7 @@ static void rt8973a_init_dev_type(struct rt8973a_muic_info *info)
>  	}
>  }
>  
> -static int rt8973a_muic_i2c_probe(struct i2c_client *i2c,
> -				 const struct i2c_device_id *id)
> +static int rt8973a_muic_i2c_probe(struct i2c_client *i2c)
>  {
>  	struct device_node *np = i2c->dev.of_node;
>  	struct rt8973a_muic_info *info;
> @@ -696,7 +695,7 @@ static struct i2c_driver rt8973a_muic_i2c_driver = {
>  		.pm	= &rt8973a_muic_pm_ops,
>  		.of_match_table = rt8973a_dt_match,
>  	},
> -	.probe	= rt8973a_muic_i2c_probe,
> +	.probe_new = rt8973a_muic_i2c_probe,
>  	.remove	= rt8973a_muic_i2c_remove,
>  	.id_table = rt8973a_i2c_id,
>  };
> diff --git a/drivers/extcon/extcon-usbc-tusb320.c b/drivers/extcon/extcon-usbc-tusb320.c
> index 6ba3d89b106d..ca752ddf7763 100644
> --- a/drivers/extcon/extcon-usbc-tusb320.c
> +++ b/drivers/extcon/extcon-usbc-tusb320.c
> @@ -230,8 +230,7 @@ static const struct regmap_config tusb320_regmap_config = {
>  	.val_bits = 8,
>  };
>  
> -static int tusb320_extcon_probe(struct i2c_client *client,
> -				const struct i2c_device_id *id)
> +static int tusb320_extcon_probe(struct i2c_client *client)
>  {
>  	struct tusb320_priv *priv;
>  	const void *match_data;
> @@ -313,7 +312,7 @@ static const struct of_device_id tusb320_extcon_dt_match[] = {
>  MODULE_DEVICE_TABLE(of, tusb320_extcon_dt_match);
>  
>  static struct i2c_driver tusb320_extcon_driver = {
> -	.probe		= tusb320_extcon_probe,
> +	.probe_new	= tusb320_extcon_probe,
>  	.driver		= {
>  		.name	= "extcon-tusb320",
>  		.of_match_table = tusb320_extcon_dt_match,
> 
> base-commit: 833477fce7a14d43ae4c07f8ddc32fa5119471a2


-- 
Best Regards,
Samsung Electronics
Chanwoo Choi