msm: gpio: Add gpiomux calls to request and free.

Add gpiomux get and put calls to msmgpio request and free,
in order to allow gpio lines to be properly reference-counted
and power-managed.

Signed-off-by: Gregory Bean <gbean@codeaurora.org>
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/arch/arm/mach-msm/gpio.c b/arch/arm/mach-msm/gpio.c
index 5040f1cb64f9..33051b509e88 100644
--- a/arch/arm/mach-msm/gpio.c
+++ b/arch/arm/mach-msm/gpio.c
@@ -21,6 +21,7 @@
 #include <linux/irq.h>
 #include <linux/module.h>
 #include "gpio_hw.h"
+#include "gpiomux.h"
 
 #define FIRST_GPIO_IRQ MSM_GPIO_TO_INT(0)
 
@@ -44,6 +45,8 @@
                         .direction_input = msm_gpio_direction_input,    \
                         .direction_output = msm_gpio_direction_output,  \
                         .to_irq = msm_gpio_to_irq,                      \
+                        .request = msm_gpio_request,                    \
+                        .free = msm_gpio_free,                          \
                 }                                                       \
         }
 
@@ -171,6 +174,21 @@ static int msm_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
         return MSM_GPIO_TO_INT(chip->base + offset);
 }
 
+#ifdef CONFIG_MSM_GPIOMUX
+static int msm_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+        return msm_gpiomux_get(chip->base + offset);
+}
+
+static void msm_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+        msm_gpiomux_put(chip->base + offset);
+}
+#else
+#define msm_gpio_request NULL
+#define msm_gpio_free NULL
+#endif
+
 struct msm_gpio_chip msm_gpio_chips[] = {
 #if defined(CONFIG_ARCH_MSM7X00A)
         MSM_GPIO_BANK(0,   0,  15),