linux-kernel - Re: [PATCH 4/4] input: keyboard: gpio-keys-polled: skip oftree code when CONFIG

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Date:   Mon, 29 Apr 2019 12:44:08 -0700
From:   Frank Rowand <frowand.list@...il.com>
To:     "Enrico Weigelt, metux IT consult" <info@...ux.net>,
        linux-kernel@...r.kernel.org
Cc:     dmitry.torokhov@...il.com, linux-input@...r.kernel.org
Subject: Re: [PATCH 4/4] input: keyboard: gpio-keys-polled: skip oftree code
 when CONFIG_OF disabled

On 4/16/19 12:57 PM, Enrico Weigelt, metux IT consult wrote:
> we don't need to build in oftree probing stuff when oftree isn't
> enabled at all.
> 
> Signed-off-by: Enrico Weigelt, metux IT consult <info@...ux.net>
> ---
>  drivers/input/keyboard/gpio_keys_polled.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/input/keyboard/gpio_keys_polled.c b/drivers/input/keyboard/gpio_keys_polled.c
> index 3f773b2..fbccb89 100644
> --- a/drivers/input/keyboard/gpio_keys_polled.c
> +++ b/drivers/input/keyboard/gpio_keys_polled.c
> @@ -147,6 +147,7 @@ static void gpio_keys_polled_close(struct input_polled_dev *dev)
>  static struct gpio_keys_platform_data *
>  gpio_keys_polled_get_devtree_pdata(struct device *dev)
>  {
> +#ifdef CONFIG_OF
>  	struct gpio_keys_platform_data *pdata;
>  	struct gpio_keys_button *button;
>  	struct fwnode_handle *child;
> @@ -200,6 +201,9 @@ static void gpio_keys_polled_close(struct input_polled_dev *dev)
>  	}
>  
>  	return pdata;
> +#else /* CONFIG_OF */
> +	return ERR_PTR(-ENOENT);
> +#endif /* CONFIG_OF */
>  }
>  
>  static void gpio_keys_polled_set_abs_params(struct input_dev *input,
> @@ -226,7 +230,7 @@ static void gpio_keys_polled_set_abs_params(struct input_dev *input,
>  	{ .compatible = "gpio-keys-polled", },
>  	{ },
>  };


> -MODULE_DEVICE_TABLE(of, gpio_keys_polled_of_match);
> +MODULE_DEVICE_TABLE_OF(gpio_keys_polled_of_match);

Not needed, when you use of_match_ptr() -- see below.

>  
>  static struct gpio_desc *gpio_keys_polled_get_gpiod_fwnode(
>  	struct device *dev,
> @@ -452,7 +456,9 @@ static int gpio_keys_polled_probe(struct platform_device *pdev)
>  	.probe	= gpio_keys_polled_probe,
>  	.driver	= {
>  		.name	= DRV_NAME,

> +#ifdef CONFIG_OF
>  		.of_match_table = gpio_keys_polled_of_match,
> +#endif /* CONFIG_OF */

No need for the #ifdef, use of_match_ptr():

  		.of_match_table = of_match_ptr(gpio_keys_polled_of_match),


>  	},
>  };
>  module_platform_driver(gpio_keys_polled_driver);
>