OMAP15xx: GPIO: Introduce support for GPIO init

Add support for handling OMAP15xx 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>

3 files changed, 118 insertions, 8 deletions

diff --git a/arch/arm/mach-omap1/gpio15xx.c b/arch/arm/mach-omap1/gpio15xx.c
new file mode 100644
index 000000000000..dbd81688eada
--- /dev/null
+++ b/arch/arm/mach-omap1/gpio15xx.c
@@ -0,0 +1,98 @@
+/*
+ * OMAP15xx 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 OMAP1_MPUIO_VBASE               OMAP1_MPUIO_BASE
+#define OMAP1510_GPIO_BASE              0xFFFCE000
+
+/* gpio1 */
+static struct __initdata resource omap15xx_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 omap15xx_mpu_gpio_config = {
+        .virtual_irq_start      = IH_MPUIO_BASE,
+        .bank_type              = METHOD_MPUIO,
+        .bank_width             = 16,
+};
+
+static struct __initdata platform_device omap15xx_mpu_gpio = {
+        .name           = "omap_gpio",
+        .id             = 0,
+        .dev            = {
+                .platform_data = &omap15xx_mpu_gpio_config,
+        },
+        .num_resources = ARRAY_SIZE(omap15xx_mpu_gpio_resources),
+        .resource = omap15xx_mpu_gpio_resources,
+};
+
+/* gpio2 */
+static struct __initdata resource omap15xx_gpio_resources[] = {
+        {
+                .start  = OMAP1510_GPIO_BASE,
+                .end    = OMAP1510_GPIO_BASE + SZ_2K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .start  = INT_GPIO_BANK1,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct __initdata omap_gpio_platform_data omap15xx_gpio_config = {
+        .virtual_irq_start      = IH_GPIO_BASE,
+        .bank_type              = METHOD_GPIO_1510,
+        .bank_width             = 16,
+};
+
+static struct __initdata platform_device omap15xx_gpio = {
+        .name           = "omap_gpio",
+        .id             = 1,
+        .dev            = {
+                .platform_data = &omap15xx_gpio_config,
+        },
+        .num_resources = ARRAY_SIZE(omap15xx_gpio_resources),
+        .resource = omap15xx_gpio_resources,
+};
+
+/*
+ * omap15xx_gpio_init needs to be done before
+ * machine_init functions access gpio APIs.
+ * Hence omap15xx_gpio_init is a postcore_initcall.
+ */
+static int __init omap15xx_gpio_init(void)
+{
+        if (!cpu_is_omap15xx())
+                return -EINVAL;
+
+        platform_device_register(&omap15xx_mpu_gpio);
+        platform_device_register(&omap15xx_gpio);
+
+        gpio_bank_count = 2;
+        return 0;
+}
+postcore_initcall(omap15xx_gpio_init);
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index e4741905285b..2b0d90109828 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -205,13 +205,6 @@ struct gpio_bank {
         u32 dbck_enable_mask;
 };
 
-#define METHOD_MPUIO            0
-#define METHOD_GPIO_1510        1
-#define METHOD_GPIO_1610        2
-#define METHOD_GPIO_7XX         3
-#define METHOD_GPIO_24XX        5
-#define METHOD_GPIO_44XX        6
-
 #ifdef CONFIG_ARCH_OMAP16XX
 static struct gpio_bank gpio_bank_1610[5] = {
         { OMAP1_MPUIO_VBASE, NULL, INT_MPUIO, IH_MPUIO_BASE,
@@ -335,7 +328,8 @@ static struct gpio_bank gpio_bank_44xx[6] = {
 #endif
 
 static struct gpio_bank *gpio_bank;
-static int gpio_bank_count;
+/* TODO: Analyze removing gpio_bank_count usage from driver code */
+int gpio_bank_count;
 
 static inline struct gpio_bank *get_gpio_bank(int gpio)
 {
diff --git a/arch/arm/plat-omap/include/plat/gpio.h b/arch/arm/plat-omap/include/plat/gpio.h
index de1c604962eb..5bef86d76a6a 100644
--- a/arch/arm/plat-omap/include/plat/gpio.h
+++ b/arch/arm/plat-omap/include/plat/gpio.h
@@ -27,6 +27,7 @@
 #define __ASM_ARCH_OMAP_GPIO_H
 
 #include <linux/io.h>
+#include <linux/platform_device.h>
 #include <mach/irqs.h>
 
 #define OMAP1_MPUIO_BASE                        0xfffb5000
@@ -71,6 +72,23 @@
                                  IH_MPUIO_BASE + ((nr) & 0x0f) : \
                                  IH_GPIO_BASE + (nr))
 
+#define METHOD_MPUIO            0
+#define METHOD_GPIO_1510        1
+#define METHOD_GPIO_1610        2
+#define METHOD_GPIO_7XX         3
+#define METHOD_GPIO_24XX        5
+#define METHOD_GPIO_44XX        6
+
+struct omap_gpio_platform_data {
+        u16 virtual_irq_start;
+        int bank_type;
+        int bank_width;         /* GPIO bank width */
+        bool dbck_flag;         /* dbck required or not - True for OMAP3&4 */
+};
+
+/* TODO: Analyze removing gpio_bank_count usage from driver code */
+extern int gpio_bank_count;
+
 extern int omap_gpio_init(void);        /* Call from board init only */
 extern void omap2_gpio_prepare_for_idle(int power_state);
 extern void omap2_gpio_resume_after_idle(void);