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Date: Thu, 02 May 2024 03:28:39 +0200
From: Dragan Simic <dsimic@manjaro.org>
To: Folker Schwesinger <dev@folker-schwesinger.de>
Cc: Chukun Pan <amadeus@jmu.edu.cn>, Heiko Stuebner <heiko@sntech.de>, Conor
 Dooley <conor+dt@kernel.org>, Krzysztof Kozlowski <krzk+dt@kernel.org>, Rob
 Herring <robh@kernel.org>, linux-arm-kernel@lists.infradead.org,
 linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org,
 devicetree@vger.kernel.org
Subject: Re: [PATCH v2 2/2] arm64: dts: rockchip: Add Radxa ROCK 3C
In-Reply-To: <D0X7UJELGST3.2IL1AFDJ89N07@folker-schwesinger.de>
References: <20240428123618.72170-1-amadeus@jmu.edu.cn>
 <20240428123618.72170-3-amadeus@jmu.edu.cn>
 <D0X7UJELGST3.2IL1AFDJ89N07@folker-schwesinger.de>
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Hello Folker,

On 2024-04-30 07:42, Folker Schwesinger wrote:
> On Sun Apr 28, 2024 at 2:36 PM CEST, Chukun Pan wrote:
>> [...]
>> +&sdhci {
>> +	bus-width = <8>;
>> +	max-frequency = <200000000>;
>> +	mmc-hs200-1_8v;
> 
> Out of curiosity, does this board also support HS400? From a very brief
> look this board seems quite similar to Rock 4 series boards, that do
> support HS400.

In a word, no, unfortunately.  In more detail, the Rockchip RK3566
and RK3568 SoCs support the eMMC modes up to and including HS200, but
not the HS400 mode.

>> +	non-removable;
>> +	pinctrl-names = "default";
>> +	pinctrl-0 = <&emmc_bus8 &emmc_clk &emmc_cmd &emmc_datastrobe>;
>> +	vmmc-supply = <&vcc_3v3>;
>> +	vqmmc-supply = <&vcc_1v8>;
>> +	status = "okay";
>> +};
> 
> 
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