From: Vignesh R <vigneshr@ti.com>
To: Tony Lindgren <tony@atomide.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
devicetree@vger.kernel.org, Vignesh R <vigneshr@ti.com>,
linux-kernel@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: dts: dra7xx: Increase spi-max-frequency to 76.8MHz for QSPI
Date: Mon, 1 Aug 2016 18:36:55 +0530 [thread overview]
Message-ID: <20160801130655.15004-1-vigneshr@ti.com> (raw)
According to AM572x DM SPRS953A, QSPI maximum bus speed can be 76.8MHz.
Therefore, increase the spi-max-frequency value of QSPI node to 76.8MHz
for DRA74 and DRA72 evm. This improves flash raw read speed by ~2MB/s.
Signed-off-by: Vignesh R <vigneshr@ti.com>
---
arch/arm/boot/dts/dra7-evm.dts | 4 ++--
arch/arm/boot/dts/dra72-evm-common.dtsi | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/arm/boot/dts/dra7-evm.dts b/arch/arm/boot/dts/dra7-evm.dts
index bafcfac067ec..f9d1170033fd 100644
--- a/arch/arm/boot/dts/dra7-evm.dts
+++ b/arch/arm/boot/dts/dra7-evm.dts
@@ -664,10 +664,10 @@
&qspi {
status = "okay";
- spi-max-frequency = <64000000>;
+ spi-max-frequency = <76800000>;
m25p80@0 {
compatible = "s25fl256s1";
- spi-max-frequency = <64000000>;
+ spi-max-frequency = <76800000>;
reg = <0>;
spi-tx-bus-width = <1>;
spi-rx-bus-width = <4>;
diff --git a/arch/arm/boot/dts/dra72-evm-common.dtsi b/arch/arm/boot/dts/dra72-evm-common.dtsi
index 9d3cf50ca37e..c94d8d64710d 100644
--- a/arch/arm/boot/dts/dra72-evm-common.dtsi
+++ b/arch/arm/boot/dts/dra72-evm-common.dtsi
@@ -681,10 +681,10 @@
&qspi {
status = "okay";
- spi-max-frequency = <64000000>;
+ spi-max-frequency = <76800000>;
m25p80@0 {
compatible = "s25fl256s1";
- spi-max-frequency = <64000000>;
+ spi-max-frequency = <76800000>;
reg = <0>;
spi-tx-bus-width = <1>;
spi-rx-bus-width = <4>;
--
2.9.2
next reply other threads:[~2016-08-01 13:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-01 13:06 Vignesh R [this message]
2016-08-26 15:15 ` [PATCH] ARM: dts: dra7xx: Increase spi-max-frequency to 76.8MHz for QSPI Tony Lindgren
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