Re: [PATCH v1 2/2] pinctrl: intel: Try to retrieve driver data for pure platform drivers

[Mika Westerberg <mika.westerberg@linux.intel.com>]

On Mon, Aug 31, 2026 at 04:25:47PM +0200, Andy Shevchenko wrote:
> The Denverton pinctrl device can be instantiated by the Intel LPC
> driver as an MFD platform device named "denverton-pinctrl".
> 
> On affected systems the platform device does not carry the INTC3000
> ACPI match data itself. As a result, intel_pinctrl_probe_by_hid()
> fails to obtain the SoC data using device_get_match_data() and
> returns -ENODATA.
> 
> This might be also true for other platforms that can be enumerated
> by ACPI _HID. Fix the above by trying the pure platform driver data
> in case the firmware node is not set or doesn't carry the necessary
> information.
> 
> Reported-by: Radek Válko <rvalko@lipicko.cz>
> Closes: https://lore.kernel.org/r/20260827184259.32386-1-rvalko@lipicko.cz
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> ---
>  drivers/pinctrl/intel/pinctrl-intel.c | 25 ++++++++++++++++++++++---
>  1 file changed, 22 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c
> index 7aa7f81ac405..50ffad6a7610 100644
> --- a/drivers/pinctrl/intel/pinctrl-intel.c
> +++ b/drivers/pinctrl/intel/pinctrl-intel.c
> @@ -1716,13 +1716,32 @@ int intel_pinctrl_probe(struct platform_device *pdev,
>  }
>  EXPORT_SYMBOL_NS_GPL(intel_pinctrl_probe, "PINCTRL_INTEL");
>  
> +static const struct intel_pinctrl_soc_data *
> +intel_pinctrl_get_soc_data_by_hid(struct platform_device *pdev)

pdev can be const, no?

> +{
> +	const struct intel_pinctrl_soc_data *data;
> +	const struct platform_device_id *id;
> +	struct device *dev = &pdev->dev;
> +
> +	data = device_get_match_data(dev);
> +	if (data)
> +		return data;
> +
> +	id = platform_get_device_id(pdev);
> +	if (!id)
> +		return ERR_PTR(-ENODEV);
> +
> +	data = (const struct intel_pinctrl_soc_data *)id->driver_data;
> +	return data ?: ERR_PTR(-ENODATA);
> +}
> +
>  int intel_pinctrl_probe_by_hid(struct platform_device *pdev)
>  {
>  	const struct intel_pinctrl_soc_data *data;
>  
> -	data = device_get_match_data(&pdev->dev);
> -	if (!data)
> -		return -ENODATA;
> +	data = intel_pinctrl_get_soc_data_by_hid(pdev);
> +	if (IS_ERR(data))
> +		return PTR_ERR(data);
>  
>  	return intel_pinctrl_probe(pdev, data);
>  }
> -- 
> 2.50.1