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

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>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/boot/dts/dra7-evm.dts b/arch/arm/boot/dts/dra7-evm.dts
index d47c873..3350722 100644 (file)
--- 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 9d3cf50..c94d8d6 100644 (file)
--- 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>;