The gpiolib code is always returning 0 when reading pad values if the pads
are configured as output. Using DR registers instead of PSR is fixing that.

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Index: linux-2.6-submit/arch/arm/plat-mxc/gpio.c
===================================================================
--- linux-2.6-submit.orig/arch/arm/plat-mxc/gpio.c	2010-11-24 18:00:47.000000000 +0100
+++ linux-2.6-submit/arch/arm/plat-mxc/gpio.c	2010-11-24 18:06:54.000000000 +0100
@@ -276,6 +276,10 @@
 {
 	struct mxc_gpio_port *port =
 		container_of(chip, struct mxc_gpio_port, chip);
+	u32 l = __raw_readl(port->base + GPIO_GDIR);
+
+	if (cpu_is_mx51() && (l & (1 << offset)))
+		return (__raw_readl(port->base + GPIO_DR) >> offset) & 1;
 
 	return (__raw_readl(port->base + GPIO_PSR) >> offset) & 1;
 }