From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fabien Parent Subject: [PATCH] ARM: davinci: da850-evm: fix read access to SPI flash Date: Tue, 17 Jan 2017 13:57:42 +0100 Message-ID: <20170117125742.9536-1-fparent@baylibre.com> Return-path: Sender: linux-kernel-owner@vger.kernel.org To: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: khilman@baylibre.com, nsekhar@ti.com, robh+dt@kernel.org, mark.rutland@arm.com, Fabien Parent List-Id: devicetree@vger.kernel.org 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. Signed-off-by: Fabien Parent --- 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 41de15fe15a2..78492a0bbbab 100644 --- 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"; -- 2.11.0