linux-kernel - [PATCH v7 4/9] ARM: dts: am437x: Disable wait pin monitoring for NAND

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Date:	Tue, 23 Feb 2016 18:37:20 +0200
From:	Roger Quadros <rogerq@...com>
To:	<tony@...mide.com>
CC:	<computersforpeace@...il.com>, <ezequiel@...guardiasur.com.ar>,
	<javier@...hile0.org>, <fcooper@...com>, <nsekhar@...com>,
	<linux-omap@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Roger Quadros <rogerq@...com>
Subject: [PATCH v7 4/9] ARM: dts: am437x: Disable wait pin monitoring for NAND

The NAND Ready/Busy# line is connected to GPMC_WAIT0 pin and
can't be used for wait state insertion for NAND I/O read/write.
So disable read/write wait monitoring as per Reference Manual's
suggestion [1].

[1] AM437x TRM: SPRUHL7D: 9.1.3.3.12.2 NAND Device-Ready Pin

Signed-off-by: Roger Quadros <rogerq@...com>
---
 arch/arm/boot/dts/am437x-cm-t43.dts  | 5 -----
 arch/arm/boot/dts/am437x-gp-evm.dts  | 2 --
 arch/arm/boot/dts/am43x-epos-evm.dts | 2 --
 3 files changed, 9 deletions(-)

diff --git a/arch/arm/boot/dts/am437x-cm-t43.dts b/arch/arm/boot/dts/am437x-cm-t43.dts
index 4aa5357..9551c47 100644
--- a/arch/arm/boot/dts/am437x-cm-t43.dts
+++ b/arch/arm/boot/dts/am437x-cm-t43.dts
@@ -170,17 +170,12 @@
 		gpmc,access-ns = <64>;
 		gpmc,rd-cycle-ns = <82>;
 		gpmc,wr-cycle-ns = <82>;
-		gpmc,wait-on-read = "true";
-		gpmc,wait-on-write = "true";
 		gpmc,bus-turnaround-ns = <0>;
 		gpmc,cycle2cycle-delay-ns = <0>;
 		gpmc,clk-activation-ns = <0>;
-		gpmc,wait-monitoring-ns = <0>;
 		gpmc,wr-access-ns = <40>;
 		gpmc,wr-data-mux-bus-ns = <0>;
 
-		gpmc,wait-pin = <0>;
-
 		#address-cells = <1>;
 		#size-cells = <1>;
 		/* MTD partition table */
diff --git a/arch/arm/boot/dts/am437x-gp-evm.dts b/arch/arm/boot/dts/am437x-gp-evm.dts
index 7081b88..b3cfedb 100644
--- a/arch/arm/boot/dts/am437x-gp-evm.dts
+++ b/arch/arm/boot/dts/am437x-gp-evm.dts
@@ -837,11 +837,9 @@
 		gpmc,access-ns = <30>;
 		gpmc,rd-cycle-ns = <40>;
 		gpmc,wr-cycle-ns = <40>;
-		gpmc,wait-pin = <0>;
 		gpmc,bus-turnaround-ns = <0>;
 		gpmc,cycle2cycle-delay-ns = <0>;
 		gpmc,clk-activation-ns = <0>;
-		gpmc,wait-monitoring-ns = <0>;
 		gpmc,wr-access-ns = <40>;
 		gpmc,wr-data-mux-bus-ns = <0>;
 		/* MTD partition table */
diff --git a/arch/arm/boot/dts/am43x-epos-evm.dts b/arch/arm/boot/dts/am43x-epos-evm.dts
index 12b08cf..b1f2bd6 100644
--- a/arch/arm/boot/dts/am43x-epos-evm.dts
+++ b/arch/arm/boot/dts/am43x-epos-evm.dts
@@ -586,11 +586,9 @@
 		gpmc,access-ns = <30>; /* tCEA + 4*/
 		gpmc,rd-cycle-ns = <40>;
 		gpmc,wr-cycle-ns = <40>;
-		gpmc,wait-pin = <0>;
 		gpmc,bus-turnaround-ns = <0>;
 		gpmc,cycle2cycle-delay-ns = <0>;
 		gpmc,clk-activation-ns = <0>;
-		gpmc,wait-monitoring-ns = <0>;
 		gpmc,wr-access-ns = <40>;
 		gpmc,wr-data-mux-bus-ns = <0>;
 		/* MTD partition table */
-- 
2.5.0