linux-kernel - [PATCH] arm64: dts: hikey: Enable SDIO high-speed mode on WL1835 module

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Message-Id: <20180330161118.5751-1-ryan@edited.us>
Date:   Fri, 30 Mar 2018 11:11:18 -0500
From:   Ryan Grachek <ryan@...ted.us>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Ryan Grachek <ryan@...ted.us>, Wei Xu <xuwei5@...ilicon.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: dts: hikey: Enable SDIO high-speed mode on WL1835 module

According to hardware documentation, the WL1835MOD WiFi chip
supports SDIO high-speed mode, which increases the clock to
50 MHz. This results in a modest increase in throughput.

Signed-off-by: Ryan Grachek <ryan@...ted.us>
---
 arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
index 5d5aa4f4a235..a5e0cc4370e1 100644
--- a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
+++ b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
@@ -322,6 +322,7 @@
 
 		dwmmc_2: dwmmc2@...3f000 {
 			bus-width = <0x4>;
+			cap-sd-highspeed;
 			non-removable;
 			vmmc-supply = <&reg_vdd_3v3>;
 			mmc-pwrseq = <&wl1835_pwrseq>;
-- 
2.11.0