ARM: dts: dra7xx: Increase spi-max-frequency to 76.8MHz for QSPI
authorVignesh R <vigneshr@ti.com>
Mon, 1 Aug 2016 13:06:55 +0000 (18:36 +0530)
committerTony Lindgren <tony@atomide.com>
Fri, 26 Aug 2016 15:14:49 +0000 (08:14 -0700)
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>
arch/arm/boot/dts/dra7-evm.dts
arch/arm/boot/dts/dra72-evm-common.dtsi

index d47c8739bdaa5e64b3248c1d0dfd2251a50c0ddc..3350722e10b736af2da9ad3e5b0f8fc3fc503b68 100644 (file)
 &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>;
index 9d3cf50ca37e40d8050d0d0a58cf6c9b113f7759..c94d8d64710dde5018a465680f025dd1ebc2171d 100644 (file)
 &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>;
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