linux-kernel - Re: [RFC PATCH v2 1/6] i2c: use DEFINE for the dummy driver name

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Date:   Wed, 15 Apr 2020 09:09:29 +0100
From:   Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
To:     Wolfram Sang <wsa+renesas@...g-engineering.com>,
        linux-i2c@...r.kernel.org
Cc:     linux-renesas-soc@...r.kernel.org, linux-i3c@...ts.infradead.org,
        Niklas Söderlund <niklas.soderlund@...natech.se>,
        Luca Ceresoli <luca@...aceresoli.net>,
        Jacopo Mondi <jacopo@...ndi.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Vladimir Zapolskiy <vz@...ia.com>,
        linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: Re: [RFC PATCH v2 1/6] i2c: use DEFINE for the dummy driver name

Hi Wolfram,

On 18/03/2020 15:00, Wolfram Sang wrote:
> We use it in multiple places, so make sure it is consistent whenever we
> need to change it.
> 
> Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>

Reviewed-by: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>

> ---
>  drivers/i2c/i2c-core-base.c | 8 ++++----
>  drivers/i2c/i2c-core.h      | 2 ++
>  2 files changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
> index cefad0881942..3d7b8a00a7d9 100644
> --- a/drivers/i2c/i2c-core-base.c
> +++ b/drivers/i2c/i2c-core-base.c
> @@ -853,7 +853,7 @@ EXPORT_SYMBOL_GPL(i2c_unregister_device);
>  
>  
>  static const struct i2c_device_id dummy_id[] = {
> -	{ "dummy", 0 },
> +	{ I2C_DUMMY_DRV_NAME, 0 },
>  	{ },
>  };
>  
> @@ -869,7 +869,7 @@ static int dummy_remove(struct i2c_client *client)
>  }
>  
>  static struct i2c_driver dummy_driver = {
> -	.driver.name	= "dummy",
> +	.driver.name	= I2C_DUMMY_DRV_NAME,
>  	.probe		= dummy_probe,
>  	.remove		= dummy_remove,
>  	.id_table	= dummy_id,
> @@ -896,7 +896,7 @@ static struct i2c_driver dummy_driver = {
>  struct i2c_client *i2c_new_dummy_device(struct i2c_adapter *adapter, u16 address)
>  {
>  	struct i2c_board_info info = {
> -		I2C_BOARD_INFO("dummy", address),
> +		I2C_BOARD_INFO(I2C_DUMMY_DRV_NAME, address),
>  	};
>  
>  	return i2c_new_client_device(adapter, &info);
> @@ -1487,7 +1487,7 @@ static void i2c_do_del_adapter(struct i2c_driver *driver,
>  static int __unregister_client(struct device *dev, void *dummy)
>  {
>  	struct i2c_client *client = i2c_verify_client(dev);
> -	if (client && strcmp(client->name, "dummy"))
> +	if (client && strcmp(client->name, I2C_DUMMY_DRV_NAME))
>  		i2c_unregister_device(client);
>  	return 0;
>  }
> diff --git a/drivers/i2c/i2c-core.h b/drivers/i2c/i2c-core.h
> index 517d98be68d2..fb89fabf84d3 100644
> --- a/drivers/i2c/i2c-core.h
> +++ b/drivers/i2c/i2c-core.h
> @@ -22,6 +22,8 @@ int i2c_check_7bit_addr_validity_strict(unsigned short addr);
>  int i2c_dev_irq_from_resources(const struct resource *resources,
>  			       unsigned int num_resources);
>  
> +#define I2C_DUMMY_DRV_NAME "dummy"
> +
>  /*
>   * We only allow atomic transfers for very late communication, e.g. to send
>   * the powerdown command to a PMIC. Atomic transfers are a corner case and not
>