ARM: pxa: recognize gpio number and type

Use cpuid to recognize the gpio number and type. CPU_PXA26x is the
special case since we can't identify it by cpuid.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>

1 files changed, 40 insertions, 1 deletions

diff --git a/drivers/gpio/gpio-pxa.c b/drivers/gpio/gpio-pxa.c
index 3e76c588f080..aebc4e8b7fd1 100644
--- a/drivers/gpio/gpio-pxa.c
+++ b/drivers/gpio/gpio-pxa.c
@@ -347,12 +347,51 @@ static struct irq_chip pxa_muxed_gpio_chip = {
         .irq_set_type   = pxa_gpio_irq_type,
 };
 
+static int pxa_gpio_nums(void)
+{
+        int count = 0;
+
+#ifdef CONFIG_ARCH_PXA
+        if (cpu_is_pxa25x()) {
+#ifdef CONFIG_CPU_PXA26x
+                count = 89;
+                gpio_type = PXA26X_GPIO;
+#elif defined(CONFIG_PXA25x)
+                count = 84;
+                gpio_type = PXA26X_GPIO;
+#endif /* CONFIG_CPU_PXA26x */
+        } else if (cpu_is_pxa27x()) {
+                count = 120;
+                gpio_type = PXA27X_GPIO;
+        } else if (cpu_is_pxa93x() || cpu_is_pxa95x()) {
+                count = 191;
+                gpio_type = PXA93X_GPIO;
+        } else if (cpu_is_pxa3xx()) {
+                count = 127;
+                gpio_type = PXA3XX_GPIO;
+        }
+#endif /* CONFIG_ARCH_PXA */
+
+#ifdef CONFIG_ARCH_MMP
+        if (cpu_is_pxa168() || cpu_is_pxa910()) {
+                count = 127;
+                gpio_type = MMP_GPIO;
+        } else if (cpu_is_mmp2()) {
+                count = 191;
+                gpio_type = MMP2_GPIO;
+        }
+#endif /* CONFIG_ARCH_MMP */
+        return count;
+}
+
 void __init pxa_init_gpio(int mux_irq, int start, int end, set_wake_t fn)
 {
         struct pxa_gpio_chip *c;
         int gpio, irq;
 
-        pxa_last_gpio = end;
+        pxa_last_gpio = pxa_gpio_nums();
+        if (!pxa_last_gpio)
+                return;
 
         /* Initialize GPIO chips */
         pxa_init_gpio_chip(end);