ARM: dts: omap3-beagle: Provide NAND ready pin
authorRoger Quadros <rogerq@ti.com>
Thu, 7 Apr 2016 10:25:40 +0000 (13:25 +0300)
committerTony Lindgren <tony@atomide.com>
Tue, 12 Apr 2016 21:32:02 +0000 (14:32 -0700)
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 13212 KiB/ to 15753 KiB/s
and write speed was unchanged at 4404 KiB/s.

Measured using mtd_speedtest.ko on omap3-beagle-c4.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
arch/arm/boot/dts/omap3-beagle.dts

index 4602866792be3bcfbb8d9a076439276f87217af2..a4deff0e2d528846e4dea6e063c10f9cf0a191f6 100644 (file)
                interrupts = <0 IRQ_TYPE_NONE>, /* fifoevent */
                             <1 IRQ_TYPE_NONE>; /* termcount */
                ti,nand-ecc-opt = "ham1";
+               rb-gpios = <&gpmc 0 GPIO_ACTIVE_HIGH>; /* gpmc_wait0 */
                nand-bus-width = <16>;
                #address-cells = <1>;
                #size-cells = <1>;