linux-kernel - Re: [PATCH v1] ACPI: LPSS: drop BayTrail and Lynxpoint pinctrl HIDs

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Date:   Tue, 3 Oct 2023 15:42:28 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Raag Jadav <raag.jadav@...el.com>
Cc:     rafael@...nel.org, len.brown@...el.com, linus.walleij@...aro.org,
        mika.westerberg@...ux.intel.com, andriy.shevchenko@...ux.intel.com,
        linux-acpi@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        mallikarjunappa.sangannavar@...el.com, bala.senthil@...el.com
Subject: Re: [PATCH v1] ACPI: LPSS: drop BayTrail and Lynxpoint pinctrl HIDs

On Tue, Oct 3, 2023 at 10:22 AM Raag Jadav <raag.jadav@...el.com> wrote:
>
> Platform devices are now created by ACPI core on device enumeration
> on acpi_bus_scan() -> acpi_bus_attach() path after commit 48459340b92b
> ("ACPI / scan: use platform bus type by default for _HID enumeration").
> No need to create them from LPSS unless we explicitly need to set
> acpi_lpss_pm_domain for them.
>
> Signed-off-by: Raag Jadav <raag.jadav@...el.com>
> Reviewed-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> ---
>  drivers/acpi/acpi_lpss.c | 11 +++--------
>  1 file changed, 3 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
> index 539e700de4d2..d54cd42c1280 100644
> --- a/drivers/acpi/acpi_lpss.c
> +++ b/drivers/acpi/acpi_lpss.c
> @@ -368,7 +368,6 @@ static const struct acpi_device_id acpi_lpss_device_ids[] = {
>         { "INT33C4", LPSS_ADDR(lpt_uart_dev_desc) },
>         { "INT33C5", LPSS_ADDR(lpt_uart_dev_desc) },
>         { "INT33C6", LPSS_ADDR(lpt_sdio_dev_desc) },
> -       { "INT33C7", },
>
>         /* BayTrail LPSS devices */
>         { "80860F09", LPSS_ADDR(byt_pwm_dev_desc) },
> @@ -376,8 +375,6 @@ static const struct acpi_device_id acpi_lpss_device_ids[] = {
>         { "80860F0E", LPSS_ADDR(byt_spi_dev_desc) },
>         { "80860F14", LPSS_ADDR(byt_sdio_dev_desc) },
>         { "80860F41", LPSS_ADDR(byt_i2c_dev_desc) },
> -       { "INT33B2", },
> -       { "INT33FC", },
>
>         /* Braswell LPSS devices */
>         { "80862286", LPSS_ADDR(lpss_dma_desc) },
> @@ -396,7 +393,6 @@ static const struct acpi_device_id acpi_lpss_device_ids[] = {
>         { "INT3434", LPSS_ADDR(lpt_uart_dev_desc) },
>         { "INT3435", LPSS_ADDR(lpt_uart_dev_desc) },
>         { "INT3436", LPSS_ADDR(lpt_sdio_dev_desc) },
> -       { "INT3437", },
>
>         /* Wildcat Point LPSS devices */
>         { "INT3438", LPSS_ADDR(lpt_spi_dev_desc) },
> @@ -657,10 +653,9 @@ static int acpi_lpss_create_device(struct acpi_device *adev,
>         int ret;
>
>         dev_desc = (const struct lpss_device_desc *)id->driver_data;
> -       if (!dev_desc) {
> -               pdev = acpi_create_platform_device(adev, NULL);
> -               return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1;
> -       }
> +       if (!dev_desc)
> +               return -EINVAL;
> +
>         pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
>         if (!pdata)
>                 return -ENOMEM;
> --

Applied as 6.7 material, thanks!