On Sun, Apr 07, 2024 at 10:04:53PM +0200, Hans de Goede wrote:
> The card-detect GPIO for the microSD slot on Asus T100TA / T100TAM models
> stopped working under Linux after commit 6fd03f024828 ("gpiolib: acpi:
> support bias pull disable").
>
> The GPIO in question is connected to a mechanical switch in the slot
> which shorts the pin to GND when a card is inserted.
>
> The GPIO pin correctly gets configured with a 20K pull-up by the BIOS,
> but there is a bug in the DSDT where the GpioInt for the card-detect is
> configured with a NoPull setting:
PullNone
(and seems somewhere else, cover letter?, you used the former, non-ACPI terminology)
> GpioInt (Edge, ActiveBoth, SharedAndWake, PullNone, 0x2710,
> "\\_SB.GPO0", 0x00, ResourceConsumer, ,
> )
> { // Pin list
> 0x0026
> }
You can decrease indentation for quite a bit.
> Linux now actually honors the PullNone setting and disables the 20K pull-up
> configured by the BIOS.
>
> Add a new DMI_QUIRK_SD_CD_ENABLE_PULL_UP quirk which when set calls
> mmc_gpiod_set_cd_config() to re-enable the pull-up and set this for
> the Asus T100TA models to fix this.
...
> Cc: Nuno Sá <nuno.sa@xxxxxxxxxx>
This can be after ---
...
> - }
> + } else if (quirks & DMI_QUIRK_SD_CD_ENABLE_PULL_UP)
> + mmc_gpiod_set_cd_config(host->mmc,
> + PIN_CONF_PACKED(PIN_CONFIG_BIAS_PULL_UP, 20000));
With {} patch will conform the coding style along with being less noisy.
--
With Best Regards,
Andy Shevchenko
