ARM: nomadik: register GPIOs dynamically
Linus Walleij [Mon, 9 Jan 2012 10:42:39 +0000 (11:42 +0100)]
Register the NHK8815 GPIO devices dynamically like the Ux500 does
it.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/mach-nomadik/cpu-8815.c

index 27f43a4..b79b384 100644 (file)
 #include "clock.h"
 #include "cpu-8815.h"
 
-#define __MEM_4K_RESOURCE(x) \
-       .res = {.start = (x), .end = (x) + SZ_4K - 1, .flags = IORESOURCE_MEM}
-
-/* The 8815 has 4 GPIO blocks, let's register them immediately */
-
-#define GPIO_RESOURCE(block)                                           \
-       {                                                               \
-               .start  = NOMADIK_GPIO##block##_BASE,                   \
-               .end    = NOMADIK_GPIO##block##_BASE + SZ_4K - 1,       \
-               .flags  = IORESOURCE_MEM,                               \
-       },                                                              \
-       {                                                               \
-               .start  = IRQ_GPIO##block,                              \
-               .end    = IRQ_GPIO##block,                              \
-               .flags  = IORESOURCE_IRQ,                               \
-       }
-
-#define GPIO_DEVICE(block)                                             \
-       {                                                               \
-               .name           = "gpio",                               \
-               .id             = block,                                \
-               .num_resources  = 2,                                    \
-               .resource       = &cpu8815_gpio_resources[block * 2],   \
-               .dev = {                                                \
-                       .platform_data = &cpu8815_gpio[block],          \
-               },                                                      \
-       }
+static AMBA_APB_DEVICE(cpu8815_amba_rng, "rng", 0, NOMADIK_RNG_BASE, { }, NULL);
 
-static struct nmk_gpio_platform_data cpu8815_gpio[] = {
-       {
-               .name = "GPIO-0-31",
-               .first_gpio = 0,
-               .first_irq = NOMADIK_GPIO_TO_IRQ(0),
-       }, {
-               .name = "GPIO-32-63",
-               .first_gpio = 32,
-               .first_irq = NOMADIK_GPIO_TO_IRQ(32),
-       }, {
-               .name = "GPIO-64-95",
-               .first_gpio = 64,
-               .first_irq = NOMADIK_GPIO_TO_IRQ(64),
-       }, {
-               .name = "GPIO-96-127", /* 124..127 not routed to pin */
-               .first_gpio = 96,
-               .first_irq = NOMADIK_GPIO_TO_IRQ(96),
-       }
+static struct amba_device *amba_devs[] __initdata = {
+       &cpu8815_amba_rng_device
 };
 
-static struct resource cpu8815_gpio_resources[] = {
-       GPIO_RESOURCE(0),
-       GPIO_RESOURCE(1),
-       GPIO_RESOURCE(2),
-       GPIO_RESOURCE(3),
+/* The 8815 has 4 GPIO blocks, let's register them immediately */
+static resource_size_t __initdata cpu8815_gpio_base[] = {
+       NOMADIK_GPIO0_BASE,
+       NOMADIK_GPIO1_BASE,
+       NOMADIK_GPIO2_BASE,
+       NOMADIK_GPIO3_BASE,
 };
 
-static struct platform_device cpu8815_platform_gpio[] = {
-       GPIO_DEVICE(0),
-       GPIO_DEVICE(1),
-       GPIO_DEVICE(2),
-       GPIO_DEVICE(3),
-};
+static struct platform_device *
+cpu8815_add_gpio(int id, resource_size_t addr, int irq,
+                struct nmk_gpio_platform_data *pdata)
+{
+       struct resource resources[] = {
+               {
+                       .start  = addr,
+                       .end    = addr + 127,
+                       .flags  = IORESOURCE_MEM,
+               },
+               {
+                       .start  = irq,
+                       .end    = irq,
+                       .flags  = IORESOURCE_IRQ,
+               }
+       };
+
+       return platform_device_register_resndata(NULL, "gpio", id,
+                               resources, ARRAY_SIZE(resources),
+                               pdata, sizeof(*pdata));
+}
 
-static AMBA_APB_DEVICE(cpu8815_amba_rng, "rng", 0, NOMADIK_RNG_BASE, { }, NULL);
+void cpu8815_add_gpios(resource_size_t *base, int num, int irq,
+                      struct nmk_gpio_platform_data *pdata)
+{
+       int first = 0;
+       int i;
 
-static struct platform_device *platform_devs[] __initdata = {
-       cpu8815_platform_gpio + 0,
-       cpu8815_platform_gpio + 1,
-       cpu8815_platform_gpio + 2,
-       cpu8815_platform_gpio + 3,
-};
+       for (i = 0; i < num; i++, first += 32, irq++) {
+               pdata->first_gpio = first;
+               pdata->first_irq = NOMADIK_GPIO_TO_IRQ(first);
+               pdata->num_gpio = 32;
 
-static struct amba_device *amba_devs[] __initdata = {
-       &cpu8815_amba_rng_device
-};
+               cpu8815_add_gpio(i, base[i], irq, pdata);
+       }
+}
 
 static int __init cpu8815_init(void)
 {
        int i;
+       struct nmk_gpio_platform_data pdata = {
+               /* No custom data yet */
+       };
 
-       platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
+       cpu8815_add_gpios(cpu8815_gpio_base, ARRAY_SIZE(cpu8815_gpio_base),
+                         IRQ_GPIO0, &pdata);
        for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
                amba_device_register(amba_devs[i], &iomem_resource);
        return 0;