OMAP16xx: GPIO: Introduce support for GPIO init

Add support for handling OMAP16xx specific gpio_init by
providing platform device data and doing device registration.

Signed-off-by: Charulatha V <charu@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 199 insertions, 0 deletions

diff --git a/arch/arm/mach-omap1/gpio16xx.c b/arch/arm/mach-omap1/gpio16xx.c
new file mode 100644
index 000000000000..8d4d0a061b56
--- /dev/null
+++ b/arch/arm/mach-omap1/gpio16xx.c
@@ -0,0 +1,199 @@
+/*
+ * OMAP16xx specific gpio init
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Author:
+ *      Charulatha V <charu@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/gpio.h>
+
+#define OMAP1610_GPIO1_BASE             0xfffbe400
+#define OMAP1610_GPIO2_BASE             0xfffbec00
+#define OMAP1610_GPIO3_BASE             0xfffbb400
+#define OMAP1610_GPIO4_BASE             0xfffbbc00
+#define OMAP1_MPUIO_VBASE               OMAP1_MPUIO_BASE
+
+/* mpu gpio */
+static struct __initdata resource omap16xx_mpu_gpio_resources[] = {
+        {
+                .start  = OMAP1_MPUIO_VBASE,
+                .end    = OMAP1_MPUIO_VBASE + SZ_2K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .start  = INT_MPUIO,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct __initdata omap_gpio_platform_data omap16xx_mpu_gpio_config = {
+        .virtual_irq_start      = IH_MPUIO_BASE,
+        .bank_type              = METHOD_MPUIO,
+        .bank_width             = 16,
+};
+
+static struct __initdata platform_device omap16xx_mpu_gpio = {
+        .name           = "omap_gpio",
+        .id             = 0,
+        .dev            = {
+                .platform_data = &omap16xx_mpu_gpio_config,
+        },
+        .num_resources = ARRAY_SIZE(omap16xx_mpu_gpio_resources),
+        .resource = omap16xx_mpu_gpio_resources,
+};
+
+/* gpio1 */
+static struct __initdata resource omap16xx_gpio1_resources[] = {
+        {
+                .start  = OMAP1610_GPIO1_BASE,
+                .end    = OMAP1610_GPIO1_BASE + SZ_2K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .start  = INT_GPIO_BANK1,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct __initdata omap_gpio_platform_data omap16xx_gpio1_config = {
+        .virtual_irq_start      = IH_GPIO_BASE,
+        .bank_type              = METHOD_GPIO_1610,
+        .bank_width             = 16,
+};
+
+static struct __initdata platform_device omap16xx_gpio1 = {
+        .name           = "omap_gpio",
+        .id             = 1,
+        .dev            = {
+                .platform_data = &omap16xx_gpio1_config,
+        },
+        .num_resources = ARRAY_SIZE(omap16xx_gpio1_resources),
+        .resource = omap16xx_gpio1_resources,
+};
+
+/* gpio2 */
+static struct __initdata resource omap16xx_gpio2_resources[] = {
+        {
+                .start  = OMAP1610_GPIO2_BASE,
+                .end    = OMAP1610_GPIO2_BASE + SZ_2K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .start  = INT_1610_GPIO_BANK2,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct __initdata omap_gpio_platform_data omap16xx_gpio2_config = {
+        .virtual_irq_start      = IH_GPIO_BASE + 16,
+        .bank_type              = METHOD_GPIO_1610,
+        .bank_width             = 16,
+};
+
+static struct __initdata platform_device omap16xx_gpio2 = {
+        .name           = "omap_gpio",
+        .id             = 2,
+        .dev            = {
+                .platform_data = &omap16xx_gpio2_config,
+        },
+        .num_resources = ARRAY_SIZE(omap16xx_gpio2_resources),
+        .resource = omap16xx_gpio2_resources,
+};
+
+/* gpio3 */
+static struct __initdata resource omap16xx_gpio3_resources[] = {
+        {
+                .start  = OMAP1610_GPIO3_BASE,
+                .end    = OMAP1610_GPIO3_BASE + SZ_2K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .start  = INT_1610_GPIO_BANK3,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct __initdata omap_gpio_platform_data omap16xx_gpio3_config = {
+        .virtual_irq_start      = IH_GPIO_BASE + 32,
+        .bank_type              = METHOD_GPIO_1610,
+        .bank_width             = 16,
+};
+
+static struct __initdata platform_device omap16xx_gpio3 = {
+        .name           = "omap_gpio",
+        .id             = 3,
+        .dev            = {
+                .platform_data = &omap16xx_gpio3_config,
+        },
+        .num_resources = ARRAY_SIZE(omap16xx_gpio3_resources),
+        .resource = omap16xx_gpio3_resources,
+};
+
+/* gpio4 */
+static struct __initdata resource omap16xx_gpio4_resources[] = {
+        {
+                .start  = OMAP1610_GPIO4_BASE,
+                .end    = OMAP1610_GPIO4_BASE + SZ_2K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .start  = INT_1610_GPIO_BANK4,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct __initdata omap_gpio_platform_data omap16xx_gpio4_config = {
+        .virtual_irq_start      = IH_GPIO_BASE + 48,
+        .bank_type              = METHOD_GPIO_1610,
+        .bank_width             = 16,
+};
+
+static struct __initdata platform_device omap16xx_gpio4 = {
+        .name           = "omap_gpio",
+        .id             = 4,
+        .dev            = {
+                .platform_data = &omap16xx_gpio4_config,
+        },
+        .num_resources = ARRAY_SIZE(omap16xx_gpio4_resources),
+        .resource = omap16xx_gpio4_resources,
+};
+
+static struct __initdata platform_device * omap16xx_gpio_dev[] = {
+        &omap16xx_mpu_gpio,
+        &omap16xx_gpio1,
+        &omap16xx_gpio2,
+        &omap16xx_gpio3,
+        &omap16xx_gpio4,
+};
+
+/*
+ * omap16xx_gpio_init needs to be done before
+ * machine_init functions access gpio APIs.
+ * Hence omap16xx_gpio_init is a postcore_initcall.
+ */
+static int __init omap16xx_gpio_init(void)
+{
+        int i;
+
+        if (!cpu_is_omap16xx())
+                return -EINVAL;
+
+        for (i = 0; i < ARRAY_SIZE(omap16xx_gpio_dev); i++)
+                platform_device_register(omap16xx_gpio_dev[i]);
+
+        gpio_bank_count = ARRAY_SIZE(omap16xx_gpio_dev);
+
+        return 0;
+}
+postcore_initcall(omap16xx_gpio_init);