Davinci: gpio - controller type support

This patch allows for gpio controllers that deviate from those found on
traditional davinci socs.  davinci_soc_info has an added field to indicate the
soc-specific gpio controller type.  The gpio initialization code then bails
out if necessary.

More elements (tnetv107x) to be added later into enum davinci_gpio_type.

Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Tested-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

9 files changed, 16 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/da830.c b/arch/arm/mach-davinci/da830.c
index 122e61a9f505..68e52337a1d9 100644
--- a/arch/arm/mach-davinci/da830.c
+++ b/arch/arm/mach-davinci/da830.c
@@ -19,6 +19,7 @@
 #include <mach/common.h>
 #include <mach/time.h>
 #include <mach/da8xx.h>
+#include <mach/gpio.h>
 
 #include "clock.h"
 #include "mux.h"
@@ -1199,6 +1200,7 @@ static struct davinci_soc_info davinci_soc_info_da830 = {
         .intc_irq_prios         = da830_default_priorities,
         .intc_irq_num           = DA830_N_CP_INTC_IRQ,
         .timer_info             = &da830_timer_info,
+        .gpio_type              = GPIO_TYPE_DAVINCI,
         .gpio_base              = IO_ADDRESS(DA8XX_GPIO_BASE),
         .gpio_num               = 128,
         .gpio_irq               = IRQ_DA8XX_GPIO0,
diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c
index d0fd7566712a..8aefcffa5ae2 100644
--- a/arch/arm/mach-davinci/da850.c
+++ b/arch/arm/mach-davinci/da850.c
@@ -27,6 +27,7 @@
 #include <mach/da8xx.h>
 #include <mach/cpufreq.h>
 #include <mach/pm.h>
+#include <mach/gpio.h>
 
 #include "clock.h"
 #include "mux.h"
@@ -1084,6 +1085,7 @@ static struct davinci_soc_info davinci_soc_info_da850 = {
         .intc_irq_prios         = da850_default_priorities,
         .intc_irq_num           = DA850_N_CP_INTC_IRQ,
         .timer_info             = &da850_timer_info,
+        .gpio_type              = GPIO_TYPE_DAVINCI,
         .gpio_base              = IO_ADDRESS(DA8XX_GPIO_BASE),
         .gpio_num               = 144,
         .gpio_irq               = IRQ_DA8XX_GPIO0,
diff --git a/arch/arm/mach-davinci/dm355.c b/arch/arm/mach-davinci/dm355.c
index 5efce70ccdd0..f9a54ff2d249 100644
--- a/arch/arm/mach-davinci/dm355.c
+++ b/arch/arm/mach-davinci/dm355.c
@@ -859,6 +859,7 @@ static struct davinci_soc_info davinci_soc_info_dm355 = {
         .intc_irq_prios         = dm355_default_priorities,
         .intc_irq_num           = DAVINCI_N_AINTC_IRQ,
         .timer_info             = &dm355_timer_info,
+        .gpio_type              = GPIO_TYPE_DAVINCI,
         .gpio_base              = IO_ADDRESS(DAVINCI_GPIO_BASE),
         .gpio_num               = 104,
         .gpio_irq               = IRQ_DM355_GPIOBNK0,
diff --git a/arch/arm/mach-davinci/dm365.c b/arch/arm/mach-davinci/dm365.c
index 1ee3fc818174..05666754aebe 100644
--- a/arch/arm/mach-davinci/dm365.c
+++ b/arch/arm/mach-davinci/dm365.c
@@ -1064,6 +1064,7 @@ static struct davinci_soc_info davinci_soc_info_dm365 = {
         .intc_irq_prios         = dm365_default_priorities,
         .intc_irq_num           = DAVINCI_N_AINTC_IRQ,
         .timer_info             = &dm365_timer_info,
+        .gpio_type              = GPIO_TYPE_DAVINCI,
         .gpio_base              = IO_ADDRESS(DAVINCI_GPIO_BASE),
         .gpio_num               = 104,
         .gpio_irq               = IRQ_DM365_GPIO0,
diff --git a/arch/arm/mach-davinci/dm644x.c b/arch/arm/mach-davinci/dm644x.c
index 23cbe9d04bc5..4af349efbd54 100644
--- a/arch/arm/mach-davinci/dm644x.c
+++ b/arch/arm/mach-davinci/dm644x.c
@@ -748,6 +748,7 @@ static struct davinci_soc_info davinci_soc_info_dm644x = {
         .intc_irq_prios         = dm644x_default_priorities,
         .intc_irq_num           = DAVINCI_N_AINTC_IRQ,
         .timer_info             = &dm644x_timer_info,
+        .gpio_type              = GPIO_TYPE_DAVINCI,
         .gpio_base              = IO_ADDRESS(DAVINCI_GPIO_BASE),
         .gpio_num               = 71,
         .gpio_irq               = IRQ_GPIOBNK0,
diff --git a/arch/arm/mach-davinci/dm646x.c b/arch/arm/mach-davinci/dm646x.c
index a0b373957838..bdb1acebe203 100644
--- a/arch/arm/mach-davinci/dm646x.c
+++ b/arch/arm/mach-davinci/dm646x.c
@@ -832,6 +832,7 @@ static struct davinci_soc_info davinci_soc_info_dm646x = {
         .intc_irq_prios         = dm646x_default_priorities,
         .intc_irq_num           = DAVINCI_N_AINTC_IRQ,
         .timer_info             = &dm646x_timer_info,
+        .gpio_type              = GPIO_TYPE_DAVINCI,
         .gpio_base              = IO_ADDRESS(DAVINCI_GPIO_BASE),
         .gpio_num               = 43, /* Only 33 usable */
         .gpio_irq               = IRQ_DM646X_GPIOBNK0,
diff --git a/arch/arm/mach-davinci/gpio.c b/arch/arm/mach-davinci/gpio.c
index d241b4f2abe2..e422cd300d4c 100644
--- a/arch/arm/mach-davinci/gpio.c
+++ b/arch/arm/mach-davinci/gpio.c
@@ -145,6 +145,9 @@ static int __init davinci_gpio_setup(void)
         struct davinci_soc_info *soc_info = &davinci_soc_info;
         struct davinci_gpio_regs *regs;
 
+        if (soc_info->gpio_type != GPIO_TYPE_DAVINCI)
+                return 0;
+
         /*
          * The gpio banks conceptually expose a segmented bitmap,
          * and "ngpio" is one more than the largest zero-based
diff --git a/arch/arm/mach-davinci/include/mach/common.h b/arch/arm/mach-davinci/include/mach/common.h
index 1d72883f593e..8ffef5bbd9cf 100644
--- a/arch/arm/mach-davinci/include/mach/common.h
+++ b/arch/arm/mach-davinci/include/mach/common.h
@@ -59,6 +59,7 @@ struct davinci_soc_info {
         u8                              *intc_irq_prios;
         unsigned long                   intc_irq_num;
         struct davinci_timer_info       *timer_info;
+        int                             gpio_type;
         void __iomem                    *gpio_base;
         unsigned                        gpio_num;
         unsigned                        gpio_irq;
diff --git a/arch/arm/mach-davinci/include/mach/gpio.h b/arch/arm/mach-davinci/include/mach/gpio.h
index 82591d0d48fb..9a71a26eb77f 100644
--- a/arch/arm/mach-davinci/include/mach/gpio.h
+++ b/arch/arm/mach-davinci/include/mach/gpio.h
@@ -21,6 +21,10 @@
 
 #define DAVINCI_GPIO_BASE 0x01C67000
 
+enum davinci_gpio_type {
+        GPIO_TYPE_DAVINCI = 0,
+};
+
 /*
  * basic gpio routines
  *