[PATCH v1 2/2] x86: edison: Don't take SD card detect pin into consideration

[Ferry Toth]

Hi,
Op 15-10-2021 om 19:11 schreef Andy Shevchenko:
> There are two PCB designs in the wild which use the opposite
> signaling for SD card detect. This makes U-Boot working in one case
> and failing in the other. Quirk this out by disconnecting SD card
> detect pin from the PCB by switching to mode 3.
> 
Tested-by: Ferry Toth <ftoth at exalondelft.nl> @ Intel Edison-Arduino board

> BugLink: https://github.com/edison-fw/meta-intel-edison/issues/136
> Signed-off-by: Andy Shevchenko <andriy.shevchenko at linux.intel.com>
> ---
>   arch/x86/dts/edison.dts | 12 ++++++++++++
>   1 file changed, 12 insertions(+)
> 
> diff --git a/arch/x86/dts/edison.dts b/arch/x86/dts/edison.dts
> index 2c8cf6c07102..04e8a4e457c8 100644
> --- a/arch/x86/dts/edison.dts
> +++ b/arch/x86/dts/edison.dts
> @@ -94,6 +94,7 @@
>   	sdcard: mmc at ff3fa000 {
>   		compatible = "intel,sdhci-tangier";
>   		reg = <0xff3fa000 0x1000>;
> +		cd-inverted;
>   	};
>   
>   	pmu: power at ff00b000 {
> @@ -131,6 +132,17 @@
>   		compatible = "intel,pinctrl-tangier";
>   		reg = <0xff0c0000 0x8000>;
>   
> +		/*
> +		 * Disconnect SD card detect, so it won't affect the reality
> +		 * on two different PCB designs where it's using the opposite
> +		 * signaling: Edison/Arduino uses Active Low, while SparkFun
> +		 * went with Active High.
> +		 */
> +		sd_cd at 0 {
> +			pad-offset = <37>;
> +			mode-func = <3>;
> +		};
> +
>   		/*
>   		 * Initial configuration came from the firmware.
>   		 * Which quite likely has been used in the phones, where I2C #8,
>