[v3,25/27] ARM: dts: am335x: Provide NAND ready pin

Message ID 1442588029-13769-26-git-send-email-rogerq@ti.com
State New
Headers show

Commit Message

Roger Quadros Sept. 18, 2015, 2:53 p.m.
On these boards NAND ready pin status is avilable over
GPMC_WAIT0 pin.

For NAND we don't use GPMC wait pin monitoring but
get the NAND Ready/Busy# status using GPIOlib.
GPMC driver provides the WAIT0 pin status over GPIOlib.

Read speed increases from 7869 KiB/ to 8875 KiB/s
and write speed was unchanged at 5100 KiB/s.

Measured using mtd_speedtest.ko.

Signed-off-by: Roger Quadros <rogerq@ti.com>
---
 arch/arm/boot/dts/am335x-chilisom.dtsi | 4 +---
 arch/arm/boot/dts/am335x-evm.dts       | 4 +---
 arch/arm/boot/dts/am335x-igep0033.dtsi | 4 +---
 3 files changed, 3 insertions(+), 9 deletions(-)

Patch

diff --git a/arch/arm/boot/dts/am335x-chilisom.dtsi b/arch/arm/boot/dts/am335x-chilisom.dtsi
index e2b5e22..3c71c5d 100644
--- a/arch/arm/boot/dts/am335x-chilisom.dtsi
+++ b/arch/arm/boot/dts/am335x-chilisom.dtsi
@@ -212,6 +212,7 @@ 
 		reg = <0 0 4>;	/* CS0, offset 0, IO size 4 */
 		interrupt-parent = <&intc>;
 		interrupts = <100>;
+		ready-gpio = <&gpmc 0 GPIO_ACTIVE_HIGH>; /* gpmc_wait0 */
 		ti,nand-ecc-opt = "bch8";
 		ti,elm-id = <&elm>;
 		nand-bus-width = <8>;
@@ -230,12 +231,9 @@ 
 		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>;
 	};
diff --git a/arch/arm/boot/dts/am335x-evm.dts b/arch/arm/boot/dts/am335x-evm.dts
index bea36e1..c7dfc21 100644
--- a/arch/arm/boot/dts/am335x-evm.dts
+++ b/arch/arm/boot/dts/am335x-evm.dts
@@ -523,6 +523,7 @@ 
 		reg = <0 0 4>; /* CS0, offset 0, IO size 4 */
 		interrupt-parent = <&intc>;
 		interrupts = <100>;
+		ready-gpio = <&gpmc 0 GPIO_ACTIVE_HIGH>; /* gpmc_wait0 */
 		ti,nand-ecc-opt = "bch8";
 		ti,elm-id = <&elm>;
 		nand-bus-width = <8>;
@@ -541,12 +542,9 @@ 
 		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>;
 		/* MTD partition table */
diff --git a/arch/arm/boot/dts/am335x-igep0033.dtsi b/arch/arm/boot/dts/am335x-igep0033.dtsi
index 9252ff1..84d4d50 100644
--- a/arch/arm/boot/dts/am335x-igep0033.dtsi
+++ b/arch/arm/boot/dts/am335x-igep0033.dtsi
@@ -133,6 +133,7 @@ 
 		reg = <0 0 4>; /* CS0, offset 0, IO size 4 */
 		interrupt-parent = <&intc>;
 		interrupts = <100>;
+		ready-gpio = <&gpmc 0 GPIO_ACTIVE_HIGH>; /* gpmc_wait0 */
 		nand-bus-width = <8>;
 		ti,nand-ecc-opt = "bch8";
 		gpmc,device-width = <1>;
@@ -150,12 +151,9 @@ 
 		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>;