linux-kernel - Re: [PATCH V1] leds: pca955x: Add ACPI support for pca955x

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Message-id: <adf97c74-45c1-91b8-a70b-481ae90a2194@samsung.com>
Date:   Wed, 23 Nov 2016 11:19:21 +0100
From:   Jacek Anaszewski <j.anaszewski@...sung.com>
To:     tnhuynh@....com, Richard Purdie <rpurdie@...ys.net>,
        linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Loc Ho <lho@....com>, Thang Nguyen <tqnguyen@....com>,
        Phong Vo <pvo@....com>, patches@....com,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>
Subject: Re: [PATCH V1] leds: pca955x: Add ACPI support for pca955x

Hi Tin,

Thanks for the patch. While adding ACPI support please
always add ACPI maintainers on CC.

Adding Rafael and Mika.

Thanks,
Jacek Anaszewski

On 11/23/2016 09:42 AM, tnhuynh@....com wrote:
> From: Tin Huynh <tnhuynh@....com>
>
> This patch enables ACPI support for leds-pca955x driver.
>
> Signed-off-by: Tin Huynh <tnhuynh@....com>
> ---
>  drivers/leds/leds-pca955x.c |   26 +++++++++++++++++++++++++-
>  1 files changed, 25 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
> index 840401a..8770090 100644
> --- a/drivers/leds/leds-pca955x.c
> +++ b/drivers/leds/leds-pca955x.c
> @@ -40,6 +40,7 @@
>   *  bits the chip supports.
>   */
>
> +#include <linux/acpi.h>
>  #include <linux/module.h>
>  #include <linux/delay.h>
>  #include <linux/string.h>
> @@ -100,6 +101,17 @@ struct pca955x_chipdef {
>  };
>  MODULE_DEVICE_TABLE(i2c, pca955x_id);
>
> +#ifdef CONFIG_ACPI
> +static const struct acpi_device_id pca955x_acpi_ids[] = {
> +	{ .id = "PCA9550", .driver_data = pca9550 },
> +	{ .id = "PCA9551", .driver_data = pca9551 },
> +	{ .id = "PCA9552", .driver_data = pca9552 },
> +	{ .id = "PCA9553", .driver_data = pca9553 },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(acpi, pca955x_acpi_ids);
> +#endif
> +
>  struct pca955x {
>  	struct mutex lock;
>  	struct pca955x_led *leds;
> @@ -250,7 +262,18 @@ static int pca955x_probe(struct i2c_client *client,
>  	struct led_platform_data *pdata;
>  	int i, err;
>
> -	chip = &pca955x_chipdefs[id->driver_data];
> +	if (id)
> +		chip = &pca955x_chipdefs[id->driver_data];
> +#ifdef CONFIG_ACPI
> +	else {
> +		const struct acpi_device_id *acpi_id;
> +
> +		acpi_id = acpi_match_device(pca955x_acpi_ids, &client->dev);
> +		if (!acpi_id)
> +			return -ENODEV;
> +		chip = &pca955x_chipdefs[acpi_id->driver_data];
> +	}
> +#endif
>  	adapter = to_i2c_adapter(client->dev.parent);
>  	pdata = dev_get_platdata(&client->dev);
>
> @@ -358,6 +381,7 @@ static int pca955x_remove(struct i2c_client *client)
>  static struct i2c_driver pca955x_driver = {
>  	.driver = {
>  		.name	= "leds-pca955x",
> +		.acpi_match_table = ACPI_PTR(pca955x_acpi_ids),
>  	},
>  	.probe	= pca955x_probe,
>  	.remove	= pca955x_remove,
>


-- 
Best regards,
Jacek Anaszewski