Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936634AbdCJMMu (ORCPT ); Fri, 10 Mar 2017 07:12:50 -0500 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:45084 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934461AbdCJMMr (ORCPT ); Fri, 10 Mar 2017 07:12:47 -0500 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Fabien Parent" , "Olof Johansson" , "Sekhar Nori" , "Kevin Hilman" Date: Fri, 10 Mar 2017 11:46:23 +0000 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) Subject: [PATCH 3.16 245/370] ARM: dts: da850-evm: fix read access to SPI flash In-Reply-To: X-SA-Exim-Connect-IP: 82.70.136.246 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1267 Lines: 38 3.16.42-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Fabien Parent 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 Signed-off-by: Fabien Parent [nsekhar@ti.com: subject line adjustment] Signed-off-by: Sekhar Nori Signed-off-by: Olof Johansson Signed-off-by: Ben Hutchings --- 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 @@ -59,6 +59,7 @@ #size-cells = <1>; compatible = "m25p64"; spi-max-frequency = <30000000>; + m25p,fast-read; reg = <0>; partition@0 { label = "U-Boot-SPL";