[ARM] 4559/1: pxa: make PXA_LAST_GPIO a run-time variable

This definition produces processor specific code in generic function
pxa_gpio_mode(), thus creating inconsistencies for support of pxa25x
and pxa27x in a single zImage.

As David Brownell suggests, make it a run-time variable and initialize
at run-time according to the number of GPIOs on the processor. For now
the initialization happens in pxa_init_irq_gpio(),  since there is
already a parameter for that, besides, this is and MUST be earlier
than any subsequent calls to pxa_gpio_mode().

Signed-off-by: eric miao <eric.y.miao@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/irq.c b/arch/arm/mach-pxa/irq.c
index ae2ae08032d7..3d95442d4168 100644
--- a/arch/arm/mach-pxa/irq.c
+++ b/arch/arm/mach-pxa/irq.c
@@ -349,6 +349,8 @@ void __init pxa_init_irq_gpio(int gpio_nr)
 {
         int irq, i;
 
+        pxa_last_gpio = gpio_nr - 1;
+
         /* clear all GPIO edge detects */
         for (i = 0; i < gpio_nr; i += 32) {
                 GFER(i) = 0;