gpio: Build the da8xx_gpio code for the davinci644x device

The differences include the number of GPIOs and that one is
not required to set the pinmux on request.
Signed-off-by: NHolger Hans Peter Freyther <holger@freyther.de>

arch/arm/include/asm/arch-davinci/gpio.h

@@ -65,9 +65,15 @@ struct davinci_gpio_bank {
 #define davinci_gpio_bank67 ((struct davinci_gpio *)DAVINCI_GPIO_BANK67)
 #define davinci_gpio_bank8 ((struct davinci_gpio *)DAVINCI_GPIO_BANK8)
 
+#if defined(CONFIG_SOC_DM644X)
+/* GPIO0 to GPIO53, omit the V3.3 volts one */
+#define MAX_NUM_GPIOS		70
+#else
+#define MAX_NUM_GPIOS		144
+#endif
+
 #define gpio_status()		gpio_info()
 #define GPIO_NAME_SIZE		20
-#define MAX_NUM_GPIOS		144
 #define GPIO_BANK(gp)		(davinci_gpio_bank01 + ((gp) >> 5))
 #define GPIO_BIT(gp)		((gp) & 0x1F)
 

drivers/gpio/Makefile

@@ -39,6 +39,7 @@ COBJS-$(CONFIG_SANDBOX_GPIO)	+= sandbox.o
 COBJS-$(CONFIG_SPEAR_GPIO)	+= spear_gpio.o
 COBJS-$(CONFIG_TEGRA_GPIO)	+= tegra_gpio.o
 COBJS-$(CONFIG_DA8XX_GPIO)	+= da8xx_gpio.o
+COBJS-$(CONFIG_DM644X_GPIO)	+= da8xx_gpio.o
 COBJS-$(CONFIG_ALTERA_PIO)	+= altera_pio.o
 COBJS-$(CONFIG_MPC83XX_GPIO)	+= mpc83xx_gpio.o
 COBJS-$(CONFIG_SH_GPIO_PFC)	+= sh_pfc.o

drivers/gpio/da8xx_gpio.c

@@ -31,6 +31,7 @@ static struct gpio_registry {
 	char name[GPIO_NAME_SIZE];
 } gpio_registry[MAX_NUM_GPIOS];
 
+#if defined(CONFIG_SOC_DA8XX)
 #define pinmux(x)       (&davinci_syscfg_regs->pinmux[x])
 
 static const struct pinmux_config gpio_pinmux[] = {
@@ -179,6 +180,9 @@ static const struct pinmux_config gpio_pinmux[] = {
 	{ pinmux(18), 8, 3 },
 	{ pinmux(18), 8, 2 },
 };
+#else
+#define davinci_configure_pin_mux(a, b)
+#endif
 
 int gpio_request(unsigned gpio, const char *label)
 {