This patch introduces platform_data structure for GPIO
so that GPIO module can be implemented in platform device model.
This patch also adds support for handling OMAP15xx specific gpio_init
by providing platform device data and doing device registration.
Signed-off-by: Charulatha V <charu@xxxxxx>
Signed-off-by: Basak, Partha <p-basak2@xxxxxx>
---
arch/arm/mach-omap1/gpio15xx.c | 101 ++++++++++++++++++++++++++++++++
arch/arm/plat-omap/gpio.c | 7 --
arch/arm/plat-omap/include/plat/gpio.h | 20 ++++++
3 files changed, 121 insertions(+), 7 deletions(-)
create mode 100644 arch/arm/mach-omap1/gpio15xx.c
diff --git a/arch/arm/mach-omap1/gpio15xx.c b/arch/arm/mach-omap1/gpio15xx.c
new file mode 100644
index 0000000..b2daa66
--- /dev/null
+++ b/arch/arm/mach-omap1/gpio15xx.c
@@ -0,0 +1,101 @@
+/*
+ * OMAP15XX-specific gpio code
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ *
+ * Author:
+ * Charulatha V <charu@xxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/gpio.h>
+
+#define OMAP1_MPUIO_VBASE OMAP1_MPUIO_BASE
+#define OMAP1510_GPIO_BASE 0xfffce000
+
+static struct omap_gpio_dev_attr omap15xx_gpio_attr = {
+ .bank_width = 16,
+};
+
+/*
+ * OMAP15XX GPIO1 interface data
+ */
+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,
+ .gpio_attr = &omap15xx_gpio_attr,
+};
+
+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,
+};
+
+/*
+ * OMAP15XX GPIO2 interface data
+ */
+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,
+ .gpio_attr = &omap15xx_gpio_attr,
+};
+
+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 d013b45..dfe4b9e 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,
diff --git a/arch/arm/plat-omap/include/plat/gpio.h b/arch/arm/plat-omap/include/plat/gpio.h
index de1c604..67d0086 100644
--- a/arch/arm/plat-omap/include/plat/gpio.h
+++ b/arch/arm/plat-omap/include/plat/gpio.h
@@ -28,6 +28,7 @@
#include <linux/io.h>
#include <mach/irqs.h>
+#include <linux/platform_device.h>
#define OMAP1_MPUIO_BASE 0xfffb5000
@@ -71,6 +72,25 @@
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_dev_attr {
+ int bank_width; /* GPIO bank width */
+ bool dbck_flag; /* dbck validity - True only for OMAP3&4 */
+ bool off_mode_support; /* True for OMAP3&4 non-wakeup domain GPIOs */
+};
+
+struct omap_gpio_platform_data {
+ u16 virtual_irq_start;
+ int bank_type;
+ struct omap_gpio_dev_attr *gpio_attr;
+};
+
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);
--
1.6.3.3
--
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