| From | Jiri Slaby <> | Subject | [PATCH 3.12 188/235] ARM: dts: da850-evm: fix read access to SPI flash | Date | Fri, 27 Jan 2017 11:55:21 +0100 |
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From: Fabien Parent <fparent@baylibre.com>
3.12-stable review patch. If anyone has any objections, please let me know.
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commit 43849785e1079f6606a31cb7fda92d1200849728 upstream.
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.
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: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Olof Johansson <olof@lixom.net> --- arch/arm/boot/dts/da850-evm.dts | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/arm/boot/dts/da850-evm.dts b/arch/arm/boot/dts/da850-evm.dts index 588ce58a2959..bd81f1da17a6 100644 --- a/arch/arm/boot/dts/da850-evm.dts +++ b/arch/arm/boot/dts/da850-evm.dts @@ -59,6 +59,7 @@ #size-cells = <1>; compatible = "m25p64"; spi-max-frequency = <30000000>; + m25p,fast-read; reg = <0>; partition@0 { label = "U-Boot-SPL"; -- 2.11.0
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