From: Alexander Kochetkov <al.kochet@gmail.com>
To: Heiko Stuebner <heiko@sntech.de>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Russell King <linux@armlinux.org.uk>,
linux-arm-kernel@lists.infradead.org,
linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: Alexander Kochetkov <al.kochet@gmail.com>
Subject: [PATCH] ARM: dts: rockchip: increase SD clock frequency on Radxa Rock
Date: Tue, 21 Mar 2017 18:40:22 +0300 [thread overview]
Message-ID: <1490110822-3310-1-git-send-email-al.kochet@gmail.com> (raw)
The patch set SD clock frequency to maximum possible to SD-card
(50MHz). This change actual clock frequency from 32MHz to 48MHz
(speedup 1.5X).
Banner line before patch: 'mmc_host mmc0: Bus speed (slot 0) = 32000000Hz
(slot req 50000000Hz, actual 32000000HZ div = 0)'.
Banner line after patch: 'mmc_host mmc0: Bus speed (slot 0) = 96000000Hz
(slot req 50000000Hz, actual 48000000HZ div = 1)'
Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
---
arch/arm/boot/dts/rk3188-radxarock.dts | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/boot/dts/rk3188-radxarock.dts b/arch/arm/boot/dts/rk3188-radxarock.dts
index 1da46d1..5b7daa4 100644
--- a/arch/arm/boot/dts/rk3188-radxarock.dts
+++ b/arch/arm/boot/dts/rk3188-radxarock.dts
@@ -302,6 +302,7 @@
pinctrl-0 = <&sd0_clk>, <&sd0_cmd>, <&sd0_cd>, <&sd0_bus4>;
vmmc-supply = <&vcc_sd0>;
+ clock-frequency = <50000000>;
bus-width = <4>;
cap-mmc-highspeed;
cap-sd-highspeed;
--
1.7.9.5
next reply other threads:[~2017-03-21 15:40 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-21 15:40 Alexander Kochetkov [this message]
2017-03-22 16:47 ` [PATCH] ARM: dts: rockchip: increase SD clock frequency on Radxa Rock Heiko Stuebner
2017-03-22 17:04 ` Alexander Kochetkov
[not found] ` <FCE5C7E0-7BED-4600-952A-E1EBC900F814-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-03-22 17:14 ` Alexander Kochetkov
[not found] ` <BDFC28D2-5C1F-4406-9F0E-BF089048F7DB-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-03-22 17:19 ` Heiko Stuebner
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