Hi Justin,
Have a look at the documents:
Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.yaml
Documentation/devicetree/bindings/mmc/synopsys-dw-mshc-common.yaml
Documentation/devicetree/bindings/mmc/mmc-controller.yaml
Fix &emmc as well.
> From: Justin Swartz <justin.swartz@xxxxxxxxxxxxxxxx>
> To: Heiko Stuebner <heiko@xxxxxxxxx>,
> Rob Herring <robh+dt@xxxxxxxxxx>,
> Mark Rutland <mark.rutland@xxxxxxx>
> Cc: Justin Swartz <justin.swartz@xxxxxxxxxxxxxxxx>,
> linux-arm-kernel@xxxxxxxxxxxxxxxxxxx,
> linux-rockchip@xxxxxxxxxxxxxxxxxxx, devicetree@xxxxxxxxxxxxxxx,
> linux-kernel@xxxxxxxxxxxxxxx
> Subject: [PATCH] ARM: dts: enable WLAN for Mecer Xtreme Mini S6
> Date: Sun, 5 Apr 2020 11:00:21 +0000
> Message-ID: <20200405110022.3849-1-justin.swartz@xxxxxxxxxxxxxxxx> (raw)
>
> The Mecer Xtreme Mini S6 features a wireless module, based on a
> Realtek 8723BS, which provides WLAN and Bluetooth connectivity via
> SDIO and UART interfaces respectively.
>
> Define a simple MMC power sequence that declares the GPIO pins
> connected to the module's WLAN Disable and Bluetooth Disable pins
> as active low reset signals, because both signals must be deasserted
> for WLAN radio operation.
>
> Configure the host's SDIO interface for High Speed mode with 1.8v
> I/O signalling and IRQ detection over a 4-bit wide bus.
>
> Signed-off-by: Justin Swartz <justin.swartz@xxxxxxxxxxxxxxxx>
> ---
> arch/arm/boot/dts/rk3229-xms6.dts | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
> diff --git a/arch/arm/boot/dts/rk3229-xms6.dts b/arch/arm/boot/dts/rk3229-xms6.dts
> index 679fc2b00..cdfcef41b 100644
> --- a/arch/arm/boot/dts/rk3229-xms6.dts
> +++ b/arch/arm/boot/dts/rk3229-xms6.dts
> @@ -39,6 +39,12 @@
> };
> };
>
> + sdio_pwrseq: sdio-pwrseq {
> + compatible = "mmc-pwrseq-simple";
> + reset-gpios = <&gpio2 26 GPIO_ACTIVE_LOW>,
> + <&gpio2 29 GPIO_ACTIVE_LOW>;
> + };
> +
> vcc_host: vcc-host-regulator {
> compatible = "regulator-fixed";
> enable-active-high;
> @@ -202,6 +208,18 @@
> status = "okay";
> };
>
> +&sdio {
> + bus-width = <4>;
> + cap-sd-highspeed;
> + cap-sdio-irq;
> + disable-wp;
Not used in combination with sdio and emmc.
> + mmc-pwrseq = <&sdio_pwrseq>;
> + non-removable;
> + num-slots = <1>;
Deprecated.
> + vqmmc-supply = <&vccio_1v8>;
> + status = "okay";
> +};
> +
> &sdmmc {
> cap-mmc-highspeed;
> disable-wp;
> --
> 2.11.0
