linux-kernel - RE: [PATCH 3.16 197/305] memory: omap-gpmc: Fix omap gpmc EXTRADELAY timing

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Date:	Tue, 16 Aug 2016 07:34:59 +0000
From:	<SebastienOcquidant@...on.com>
To:	<ben@...adent.org.uk>, <linux-kernel@...r.kernel.org>,
	<stable@...r.kernel.org>
CC:	<akpm@...ux-foundation.org>, <rogerq@...com>
Subject: RE: [PATCH 3.16 197/305] memory: omap-gpmc: Fix omap gpmc
 EXTRADELAY timing

Ok No problem.

Sebastien



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-----Message d'origine-----
De : Ben Hutchings [mailto:ben@...adent.org.uk] 
Envoyé : samedi 13 août 2016 19:43
À : linux-kernel@...r.kernel.org; stable@...r.kernel.org
Cc : akpm@...ux-foundation.org; Roger Quadros; Ocquidant, Sebastien
Objet : [PATCH 3.16 197/305] memory: omap-gpmc: Fix omap gpmc EXTRADELAY timing

3.16.37-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: "Ocquidant, Sebastien" <sebastienocquidant@...on.com>

commit 8f50b8e57442d28e41bb736c173d8a2490549a82 upstream.

In the omap gpmc driver it can be noticed that GPMC_CONFIG4_OEEXTRADELAY is overwritten by the WEEXTRADELAY value from the device tree and GPMC_CONFIG4_WEEXTRADELAY is not updated by the value from the device tree.

As a consequence, the memory accesses cannot be configured properly when the extra delay are needed for OE and WE.

Fix the update of GPMC_CONFIG4_WEEXTRADELAY with the value from the device tree file and prevents GPMC_CONFIG4_OEXTRADELAY being overwritten by the WEXTRADELAY value from the device tree.

Signed-off-by: Ocquidant, Sebastien <sebastienocquidant@...on.com>
Signed-off-by: Roger Quadros <rogerq@...com>
[bwh: Backported to 3.16: adjust filename]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 arch/arm/mach-omap2/gpmc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -274,7 +274,7 @@ static void gpmc_cs_bool_timings(int cs,
 	gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4,
 			   GPMC_CONFIG4_OEEXTRADELAY, p->oe_extra_delay);
 	gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4,
-			   GPMC_CONFIG4_OEEXTRADELAY, p->we_extra_delay);
+			   GPMC_CONFIG4_WEEXTRADELAY, p->we_extra_delay);
 	gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6,
 			   GPMC_CONFIG6_CYCLE2CYCLESAMECSEN,
 			   p->cycle2cyclesamecsen);