linux-kernel - Re: [PATCH v1 1/1] pinctrl: denverton: Enable platform device in the absence of ACPI enumeration

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Date:   Wed, 4 Oct 2023 10:18:01 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Andy Shevchenko <andy@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Takashi Iwai <tiwai@...e.com>
Subject: Re: [PATCH v1 1/1] pinctrl: denverton: Enable platform device in the
 absence of ACPI enumeration

On 26/09/2023 21:08, Andy Shevchenko wrote:
> This is to cater the need for non-ACPI system whereby
> a platform device has to be created in order to bind
> with the Denverton pinctrl platform driver.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>  drivers/pinctrl/intel/pinctrl-denverton.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/pinctrl/intel/pinctrl-denverton.c b/drivers/pinctrl/intel/pinctrl-denverton.c
> index 0c4694cfa594..a1a7242e0451 100644
> --- a/drivers/pinctrl/intel/pinctrl-denverton.c
> +++ b/drivers/pinctrl/intel/pinctrl-denverton.c
> @@ -257,6 +257,11 @@ static const struct acpi_device_id dnv_pinctrl_acpi_match[] = {
>  };
>  MODULE_DEVICE_TABLE(acpi, dnv_pinctrl_acpi_match);
>  
> +static const struct platform_device_id dnv_pinctrl_platform_ids[] = {
> +	{ "denverton-pinctrl", (kernel_ulong_t)&dnv_soc_data },
> +	{ }
> +};
> +
>  static struct platform_driver dnv_pinctrl_driver = {
>  	.probe = intel_pinctrl_probe_by_hid,
>  	.driver = {
> @@ -264,6 +269,7 @@ static struct platform_driver dnv_pinctrl_driver = {
>  		.acpi_match_table = dnv_pinctrl_acpi_match,
>  		.pm = &dnv_pinctrl_pm_ops,
>  	},
> +	.id_table = dnv_pinctrl_platform_ids,
>  };
>  
>  static int __init dnv_pinctrl_init(void)
> @@ -281,4 +287,5 @@ module_exit(dnv_pinctrl_exit);
>  MODULE_AUTHOR("Mika Westerberg <mika.westerberg@...ux.intel.com>");
>  MODULE_DESCRIPTION("Intel Denverton SoC pinctrl/GPIO driver");
>  MODULE_LICENSE("GPL v2");
> +MODULE_ALIAS("platform:denverton-pinctrl");

Why do you need the alias? It's the same as ID table. You most likely
miss MODULE_DEVICE_TABLE() or your table is just wrong.

Best regards,
Krzysztof