linux-kernel - [PATCH v2 21/22] ARM: dts: dra7x-evm: Provide NAND ready pin

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Message-ID: <1438938752-31010-22-git-send-email-rogerq@ti.com>
Date:	Fri, 7 Aug 2015 12:12:31 +0300
From:	Roger Quadros <rogerq@...com>
To:	<tony@...mide.com>
CC:	<dwmw2@...radead.org>, <computersforpeace@...il.com>,
	<ezequiel@...guardiasur.com.ar>, <javier@...hile0.org>,
	<fcooper@...com>, <nsekhar@...com>,
	<linux-mtd@...ts.infradead.org>, <linux-omap@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Roger Quadros <rogerq@...com>
Subject: [PATCH v2 21/22] ARM: dts: dra7x-evm: Provide NAND ready pin

On these boards NAND ready pin status is avilable over
GPMC_WAIT0 pin.

Read speed increases from 13768 KiB/ to 17246 KiB/s.
Write speed was unchanged at 7123 KiB/s.
Measured using mtd_speedtest.ko.

Signed-off-by: Roger Quadros <rogerq@...com>
---
 arch/arm/boot/dts/dra7-evm.dts  | 1 +
 arch/arm/boot/dts/dra72-evm.dts | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/dra7-evm.dts b/arch/arm/boot/dts/dra7-evm.dts
index 3fb1ced..b717fd0 100644
--- a/arch/arm/boot/dts/dra7-evm.dts
+++ b/arch/arm/boot/dts/dra7-evm.dts
@@ -575,6 +575,7 @@
 		reg = <0 0 4>;		/* device IO registers */
 		interrupt-parent = <&crossbar_mpu>;
 		interrupts = <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>;
+		ready-gpio = <&gpmc 0 GPIO_ACTIVE_HIGH>; /* gpmc_wait0 pin */
 		ti,nand-ecc-opt = "bch8";
 		ti,elm-id = <&elm>;
 		nand-bus-width = <16>;
diff --git a/arch/arm/boot/dts/dra72-evm.dts b/arch/arm/boot/dts/dra72-evm.dts
index fc0677a..c1a3397 100644
--- a/arch/arm/boot/dts/dra72-evm.dts
+++ b/arch/arm/boot/dts/dra72-evm.dts
@@ -387,6 +387,7 @@
 		 */
 		reg = <0 0 4>;		/* device IO registers */
 		interrupt-parent = <&crossbar_mpu>;
+		ready-gpio = <&gpmc 0 GPIO_ACTIVE_HIGH>; /* gpmc_wait0 pin */
 		ti,nand-ecc-opt = "bch8";
 		ti,elm-id = <&elm>;
 		nand-bus-width = <16>;
-- 
2.1.4

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