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

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Date:   Thu, 8 Dec 2022 17:46:18 +0800
From:   William Qiu <william.qiu@...rfivetech.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <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 2022/12/7 23:14, Krzysztof Kozlowski wrote:
> 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)

Will fix.

> 
>> +			compatible = "syscon";
> 
> This is not allowed alone.

Will fix.

> 
>> +			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.
> 

Hi Krzysztof,

The sys_syscon is one of system controller registers, and it is used to be the data strobe
delay chain select. I will update its type and description in next version.

Thanks,
William Qiu

> 
> Best regards,
> Krzysztof
>