linux-kernel - [PATCH v1 5/6] arm64: dts: rockchip: enable sdr-104 on sdmmc

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Date:   Wed, 11 May 2022 11:01:16 -0400
From:   Peter Geis <pgwipeout@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>
Cc:     linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Peter Geis <pgwipeout@...il.com>
Subject: [PATCH v1 5/6] arm64: dts: rockchip: enable sdr-104 on sdmmc

Now that we have working io-domain support, we can enable higher date
rates on the sdmmc card.

Before:
Timing buffered disk reads:  68 MB in  3.08 seconds =  22.07 MB/sec

After:
Timing buffered disk reads: 188 MB in  3.02 seconds =  62.29 MB/sec

Signed-off-by: Peter Geis <pgwipeout@...il.com>
---
 arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts b/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts
index 991b7b1b8443..71df64655de5 100644
--- a/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts
@@ -582,6 +582,7 @@ &sdmmc0 {
 	disable-wp;
 	pinctrl-names = "default";
 	pinctrl-0 = <&sdmmc0_bus4 &sdmmc0_clk &sdmmc0_cmd &sdmmc0_det>;
+	sd-uhs-sdr104;
 	vmmc-supply = <&vcc3v3_sd>;
 	vqmmc-supply = <&vccio_sd>;
 	status = "okay";
-- 
2.25.1