This is a note to let you know that I've just added the patch titled
ARM: dts: dra7-evm: Fix NAND GPMC timings
to the 3.16-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-dts-dra7-evm-fix-nand-gpmc-timings.patch
and it can be found in the queue-3.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5990047cef0c6a36eefcb166bd32d99a8f95c75b Mon Sep 17 00:00:00 2001
From: Roger Quadros <rogerq@xxxxxx>
Date: Wed, 10 Sep 2014 08:57:11 -0700
Subject: ARM: dts: dra7-evm: Fix NAND GPMC timings
From: Roger Quadros <rogerq@xxxxxx>
commit 5990047cef0c6a36eefcb166bd32d99a8f95c75b upstream.
The nand timings were scaled down by 2 to account for
the 2x rate returned by clk_get_rate(gpmc_fclk).
As the clock data got fixed by [1], revert back to actual
timings (i.e. scale them up by 2).
Without this NAND doesn't work on dra7-evm.
[1] - commit dd94324b983afe114ba9e7ee3649313b451f63ce
ARM: dts: dra7xx-clocks: Fix the l3 and l4 clock rates
Fixes: ff66a3c86e00 ("ARM: dts: dra7: add support for parallel NAND flash")
Signed-off-by: Roger Quadros <rogerq@xxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/boot/dts/dra7-evm.dts | 27 ++++++++++++---------------
1 file changed, 12 insertions(+), 15 deletions(-)
--- a/arch/arm/boot/dts/dra7-evm.dts
+++ b/arch/arm/boot/dts/dra7-evm.dts
@@ -427,22 +427,19 @@
gpmc,device-width = <2>;
gpmc,sync-clk-ps = <0>;
gpmc,cs-on-ns = <0>;
- gpmc,cs-rd-off-ns = <40>;
- gpmc,cs-wr-off-ns = <40>;
+ gpmc,cs-rd-off-ns = <80>;
+ gpmc,cs-wr-off-ns = <80>;
gpmc,adv-on-ns = <0>;
- gpmc,adv-rd-off-ns = <30>;
- gpmc,adv-wr-off-ns = <30>;
- gpmc,we-on-ns = <5>;
- gpmc,we-off-ns = <25>;
- gpmc,oe-on-ns = <2>;
- gpmc,oe-off-ns = <20>;
- gpmc,access-ns = <20>;
- gpmc,wr-access-ns = <40>;
- gpmc,rd-cycle-ns = <40>;
- gpmc,wr-cycle-ns = <40>;
- gpmc,wait-pin = <0>;
- gpmc,wait-on-read;
- gpmc,wait-on-write;
+ gpmc,adv-rd-off-ns = <60>;
+ gpmc,adv-wr-off-ns = <60>;
+ gpmc,we-on-ns = <10>;
+ gpmc,we-off-ns = <50>;
+ gpmc,oe-on-ns = <4>;
+ gpmc,oe-off-ns = <40>;
+ gpmc,access-ns = <40>;
+ gpmc,wr-access-ns = <80>;
+ gpmc,rd-cycle-ns = <80>;
+ gpmc,wr-cycle-ns = <80>;
gpmc,bus-turnaround-ns = <0>;
gpmc,cycle2cycle-delay-ns = <0>;
gpmc,clk-activation-ns = <0>;
Patches currently in stable-queue which might be from rogerq@xxxxxx are
queue-3.16/arm-dts-dra7-evm-fix-nand-gpmc-timings.patch
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