ARM: dts: dra7xx: Increase spi-max-frequency to 76.8MHz for QSPI
diff mbox

Message ID 20160801130655.15004-1-vigneshr@ti.com
State New
Headers show

Commit Message

Vignesh Raghavendra Aug. 1, 2016, 1:06 p.m. UTC
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(-)

Comments

Tony Lindgren Aug. 26, 2016, 3:15 p.m. UTC | #1
* Vignesh R <vigneshr@ti.com> [160801 06:07]:
> 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.

Applying into omap-for-v4.9/dt thanks.

Tony
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Patch
diff mbox

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>;