linux-kernel - Re: [PATCH v1 3/3] riscv: dts: starfive: Add mmc node

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Message-ID: <c0b84752-443f-d935-0ed8-c8ed4d212c2e@linaro.org>
Date:   Wed, 7 Dec 2022 16:14:53 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     William Qiu <william.qiu@...rfivetech.com>,
        linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-mmc@...r.kernel.org
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jaehoon Chung <jh80.chung@...sung.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 3/3] riscv: dts: starfive: Add mmc node

On 07/12/2022 14:17, William Qiu wrote:
> This adds the mmc node for the StarFive JH7110 SoC.
> Set sdioo node to emmc and set sdio1 node to sd.
> 
> Signed-off-by: William Qiu <william.qiu@...rfivetech.com>
> ---
>  .../jh7110-starfive-visionfive-v2.dts         | 25 ++++++++++++
>  arch/riscv/boot/dts/starfive/jh7110.dtsi      | 38 +++++++++++++++++++
>  2 files changed, 63 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-v2.dts b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-v2.dts
> index c8946cf3a268..6ef8e303c2e6 100644
> --- a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-v2.dts
> +++ b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-v2.dts
> @@ -47,6 +47,31 @@ &clk_rtc {
>  	clock-frequency = <32768>;
>  };
>  
> +&sdio0 {
> +	max-frequency = <100000000>;
> +	card-detect-delay = <300>;
> +	bus-width = <8>;
> +	cap-mmc-highspeed;
> +	mmc-ddr-1_8v;
> +	mmc-hs200-1_8v;
> +	non-removable;
> +	cap-mmc-hw-reset;
> +	post-power-on-delay-ms = <200>;
> +	status = "okay";
> +};
> +
> +&sdio1 {
> +	max-frequency = <100000000>;
> +	card-detect-delay = <300>;
> +	bus-width = <4>;
> +	no-sdio;
> +	no-mmc;
> +	broken-cd;
> +	cap-sd-highspeed;
> +	post-power-on-delay-ms = <200>;
> +	status = "okay";
> +};
> +
>  &gmac0_rmii_refin {
>  	clock-frequency = <50000000>;
>  };
> diff --git a/arch/riscv/boot/dts/starfive/jh7110.dtsi b/arch/riscv/boot/dts/starfive/jh7110.dtsi
> index c22e8f1d2640..e90b085d7e41 100644
> --- a/arch/riscv/boot/dts/starfive/jh7110.dtsi
> +++ b/arch/riscv/boot/dts/starfive/jh7110.dtsi
> @@ -331,6 +331,11 @@ aoncrg: clock-controller@...00000 {
>  			#reset-cells = <1>;
>  		};
>  
> +		sys_syscon: sys_syscon@...30000 {

No underscores in node names, generic node names (syscon or
system-controller)

> +			compatible = "syscon";

This is not allowed alone.

> +			reg = <0x0 0x13030000 0x0 0x1000>;
> +		};
> +
>  		gpio: gpio@...40000 {
>  			compatible = "starfive,jh7110-sys-pinctrl";
>  			reg = <0x0 0x13040000 0x0 0x10000>;
> @@ -433,5 +438,38 @@ uart5: serial@...20000 {
>  			reg-shift = <2>;
>  			status = "disabled";
>  		};
> +
> +		/* unremovable emmc as mmcblk0 */
> +		sdio0: mmc@...10000 {
> +			compatible = "starfive,jh7110-sdio";
> +			reg = <0x0 0x16010000 0x0 0x10000>;
> +			clocks = <&syscrg JH7110_SYSCLK_SDIO0_AHB>,
> +				 <&syscrg JH7110_SYSCLK_SDIO0_SDCARD>;
> +			clock-names = "biu","ciu";
> +			resets = <&syscrg JH7110_SYSRST_SDIO0_AHB>;
> +			reset-names = "reset";
> +			interrupts = <74>;
> +			fifo-depth = <32>;
> +			fifo-watermark-aligned;
> +			data-addr = <0>;
> +			starfive,sys-syscon = <&sys_syscon 0x14 0x1a 0x7c000000>;

This does not match your bindings at all. "&sys_syscon" is a phandle,
not a number of tuning retries, as you expect in your bindings.


Best regards,
Krzysztof