ARM: dts: da850-evm: fix read access to SPI flash
authorFabien Parent <fparent@baylibre.com>
Tue, 17 Jan 2017 12:57:42 +0000 (13:57 +0100)
committerOlof Johansson <olof@lixom.net>
Fri, 20 Jan 2017 00:23:19 +0000 (16:23 -0800)
Read access to the SPI flash are broken on da850-evm, i.e. the data
read is not what is actually programmed on the flash.
According to the datasheet for the M25P64 part present on the da850-evm,
if the SPI frequency is higher than 20MHz then the READ command is not
usable anymore and only the FAST_READ command can be used to read data.

This commit specifies in the DTS that we should use FAST_READ command
instead of the READ command.

Cc: stable@vger.kernel.org
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Fabien Parent <fparent@baylibre.com>
[nsekhar@ti.com: subject line adjustment]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
arch/arm/boot/dts/da850-evm.dts

index 41de15f..78492a0 100644 (file)
@@ -99,6 +99,7 @@
                                #size-cells = <1>;
                                compatible = "m25p64";
                                spi-max-frequency = <30000000>;
+                               m25p,fast-read;
                                reg = <0>;
                                partition@0 {
                                        label = "U-Boot-SPL";