Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 068/130] ARM: dts: da850-evm: fix read access to SPI flash | Date | Tue, 24 Jan 2017 08:55:08 +0100 |
| |
4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Fabien Parent <fparent@baylibre.com>
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
--- arch/arm/boot/dts/da850-evm.dts | 1 + 1 file changed, 1 insertion(+)
--- a/arch/arm/boot/dts/da850-evm.dts +++ b/arch/arm/boot/dts/da850-evm.dts @@ -99,6 +99,7 @@ #size-cells = <1>; compatible = "m25p64"; spi-max-frequency = <30000000>; + m25p,fast-read; reg = <0>; partition@0 { label = "U-Boot-SPL";
| |