From: Hiroki Kaminaga <kaminaga@sm.sony.co.jp>
Date: Mon, 20 Feb 2006 23:04:35 +0000 (-0800)
Subject: [PATCH] ARM: OMAP: update flash timing on OMAP5912OSK
X-Git-Tag: v2.6.16-omap1~56^2~1
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=37c4fa21267c1ad4f54a3265ec83096cfe76ca68;p=linux-2.6-omap-h63xx.git

[PATCH] ARM: OMAP: update flash timing on OMAP5912OSK

In linux-2.6.15-omap1 patch, in arch/arm/mach-omap1/board-osk.c,
EMIFS_CS3_VAL is set to 0x30003361.

This was introduced to fix flash timing error.
http://linux.omap.com/pipermail/linux-omap-open-source/2005-July/004717.html

On the other hand, in SectionE:Errata in EMIFS timing at:
http://omap.spectrumdigital.com/osk5912/osk5912_faq.html
EMIFS_CS3_VAL was set to 0x88013141, fixing write/read rate.

Reading from
http://focus.ti.com/lit/ug/spru742/spru742.pdf
3.6 EMIFS Registers,

0x30003361 will set read mode from "page mode, 4 word/page" to
"asynchronous read", and read from flash slowed down.

I tested with new value 0x88013141, and works good so far.
---

diff --git a/arch/arm/mach-omap1/board-osk.c b/arch/arm/mach-omap1/board-osk.c
index 16e08b476d6..56c8a4b12bb 100644
--- a/arch/arm/mach-omap1/board-osk.c
+++ b/arch/arm/mach-omap1/board-osk.c
@@ -301,7 +301,7 @@ static void __init osk_mistral_init(void)
 static void __init osk_mistral_init(void) { }
 #endif
 
-#define EMIFS_CS3_VAL	(0x30003361)
+#define EMIFS_CS3_VAL	(0x88013141)
 
 static void __init osk_init(void)
 {