ARM: dts: N900: fix onenand timings

Commit a758f50f10cf ("mtd: onenand: omap2: Configure driver from DT")
started using DT specified timings for GPMC, and as a result the
OneNAND stopped working on N900 as we had wrong values in the DT.
Fix by updating the values to bootloader timings that have been tested
to be working on Nokia N900 with OneNAND manufacturers: Samsung,
Numonyx.

Fixes: a758f50f10cf ("mtd: onenand: omap2: Configure driver from DT")
Signed-off-by: Arthur Demchenkov <spinal.by@gmail.com>
Tested-by: Merlijn Wajer <merlijn@wizzup.org>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/boot/dts/omap3-n900.dts b/arch/arm/boot/dts/omap3-n900.dts
index c3c6d7d04a76c2416983b97c1f8f8c788ed3fcc0..4089d97405c950e0148180334d0e5fbe88154df8 100644 (file)
--- a/arch/arm/boot/dts/omap3-n900.dts
+++ b/arch/arm/boot/dts/omap3-n900.dts
@@ -854,34 +854,46 @@
                compatible = "ti,omap2-onenand";
                reg = <0 0 0x20000>;    /* CS0, offset 0, IO size 128K */
 
+               /*
+                * These timings are based on CONFIG_OMAP_GPMC_DEBUG=y reported
+                * bootloader set values when booted with v5.1
+                * (OneNAND Manufacturer: Samsung):
+                *
+                *   cs0 GPMC_CS_CONFIG1: 0xfb001202
+                *   cs0 GPMC_CS_CONFIG2: 0x00111100
+                *   cs0 GPMC_CS_CONFIG3: 0x00020200
+                *   cs0 GPMC_CS_CONFIG4: 0x11001102
+                *   cs0 GPMC_CS_CONFIG5: 0x03101616
+                *   cs0 GPMC_CS_CONFIG6: 0x90060000
+                */
                gpmc,sync-read;
                gpmc,sync-write;
                gpmc,burst-length = <16>;
                gpmc,burst-read;
                gpmc,burst-wrap;
                gpmc,burst-write;
-               gpmc,device-width = <2>; /* GPMC_DEVWIDTH_16BIT */
-               gpmc,mux-add-data = <2>; /* GPMC_MUX_AD */
+               gpmc,device-width = <2>;
+               gpmc,mux-add-data = <2>;
                gpmc,cs-on-ns = <0>;
-               gpmc,cs-rd-off-ns = <87>;
-               gpmc,cs-wr-off-ns = <87>;
+               gpmc,cs-rd-off-ns = <102>;
+               gpmc,cs-wr-off-ns = <102>;
                gpmc,adv-on-ns = <0>;
-               gpmc,adv-rd-off-ns = <10>;
-               gpmc,adv-wr-off-ns = <10>;
-               gpmc,oe-on-ns = <15>;
-               gpmc,oe-off-ns = <87>;
+               gpmc,adv-rd-off-ns = <12>;
+               gpmc,adv-wr-off-ns = <12>;
+               gpmc,oe-on-ns = <12>;
+               gpmc,oe-off-ns = <102>;
                gpmc,we-on-ns = <0>;
-               gpmc,we-off-ns = <87>;
-               gpmc,rd-cycle-ns = <112>;
-               gpmc,wr-cycle-ns = <112>;
-               gpmc,access-ns = <81>;
-               gpmc,page-burst-access-ns = <15>;
+               gpmc,we-off-ns = <102>;
+               gpmc,rd-cycle-ns = <132>;
+               gpmc,wr-cycle-ns = <132>;
+               gpmc,access-ns = <96>;
+               gpmc,page-burst-access-ns = <18>;
                gpmc,bus-turnaround-ns = <0>;
                gpmc,cycle2cycle-delay-ns = <0>;
                gpmc,wait-monitoring-ns = <0>;
-               gpmc,clk-activation-ns = <5>;
-               gpmc,wr-data-mux-bus-ns = <30>;
-               gpmc,wr-access-ns = <81>;
+               gpmc,clk-activation-ns = <6>;
+               gpmc,wr-data-mux-bus-ns = <36>;
+               gpmc,wr-access-ns = <96>;
                gpmc,sync-clk-ps = <15000>;
 
                /*