3 files changed, 82 insertions, 0 deletions

diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index b4357c388d2e..1f0d66561bbe 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -31,6 +31,7 @@
 
 #include <mach/hardware.h>
 #include <mach/fb.h>
+#include <mach/ep93xx_keypad.h>
 
 #include <asm/mach/map.h>
 #include <asm/mach/time.h>
@@ -728,6 +729,82 @@ void __init ep93xx_register_fb(struct ep93xxfb_mach_info *data)
 	platform_device_register(&ep93xx_fb_device);
 }
 
+
+/*************************************************************************
+ * EP93xx matrix keypad peripheral handling
+ *************************************************************************/
+static struct resource ep93xx_keypad_resource[] = {
+	{
+		.start	= EP93XX_KEY_MATRIX_PHYS_BASE,
+		.end	= EP93XX_KEY_MATRIX_PHYS_BASE + 0x0c - 1,
+		.flags	= IORESOURCE_MEM,
+	}, {
+		.start	= IRQ_EP93XX_KEY,
+		.end	= IRQ_EP93XX_KEY,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device ep93xx_keypad_device = {
+	.name			= "ep93xx-keypad",
+	.id			= -1,
+	.num_resources		= ARRAY_SIZE(ep93xx_keypad_resource),
+	.resource		= ep93xx_keypad_resource,
+};
+
+void __init ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data)
+{
+	ep93xx_keypad_device.dev.platform_data = data;
+	platform_device_register(&ep93xx_keypad_device);
+}
+
+int ep93xx_keypad_acquire_gpio(struct platform_device *pdev)
+{
+	int err;
+	int i;
+
+	for (i = 0; i < 8; i++) {
+		err = gpio_request(EP93XX_GPIO_LINE_C(i), dev_name(&pdev->dev));
+		if (err)
+			goto fail_gpio_c;
+		err = gpio_request(EP93XX_GPIO_LINE_D(i), dev_name(&pdev->dev));
+		if (err)
+			goto fail_gpio_d;
+	}
+
+	/* Enable the keypad controller; GPIO ports C and D used for keypad */
+	ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_KEYS |
+				 EP93XX_SYSCON_DEVCFG_GONK);
+
+	return 0;
+
+fail_gpio_d:
+	gpio_free(EP93XX_GPIO_LINE_C(i));
+fail_gpio_c:
+	for ( ; i >= 0; --i) {
+		gpio_free(EP93XX_GPIO_LINE_C(i));
+		gpio_free(EP93XX_GPIO_LINE_D(i));
+	}
+	return err;
+}
+EXPORT_SYMBOL(ep93xx_keypad_acquire_gpio);
+
+void ep93xx_keypad_release_gpio(struct platform_device *pdev)
+{
+	int i;
+
+	for (i = 0; i < 8; i++) {
+		gpio_free(EP93XX_GPIO_LINE_C(i));
+		gpio_free(EP93XX_GPIO_LINE_D(i));
+	}
+
+	/* Disable the keypad controller; GPIO ports C and D used for GPIO */
+	ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_KEYS |
+			       EP93XX_SYSCON_DEVCFG_GONK);
+}
+EXPORT_SYMBOL(ep93xx_keypad_release_gpio);
+
+
 extern void ep93xx_gpio_init(void);
 
 void __init ep93xx_init_devices(void)
diff --git a/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h b/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h
index b1f937eda29c..d55194a4c093 100644
--- a/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h
+++ b/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h
@@ -134,6 +134,7 @@
 #define EP93XX_UART3_PHYS_BASE		EP93XX_APB_PHYS(0x000e0000)
 #define EP93XX_UART3_BASE		EP93XX_APB_IOMEM(0x000e0000)
 
+#define EP93XX_KEY_MATRIX_PHYS_BASE	EP93XX_APB_PHYS(0x000f0000)
 #define EP93XX_KEY_MATRIX_BASE		EP93XX_APB_IOMEM(0x000f0000)
 
 #define EP93XX_ADC_BASE			EP93XX_APB_IOMEM(0x00100000)
diff --git a/arch/arm/mach-ep93xx/include/mach/platform.h b/arch/arm/mach-ep93xx/include/mach/platform.h
index 469fd968d517..c6dc14dbca18 100644
--- a/arch/arm/mach-ep93xx/include/mach/platform.h
+++ b/arch/arm/mach-ep93xx/include/mach/platform.h
@@ -8,6 +8,7 @@ struct i2c_gpio_platform_data;
 struct i2c_board_info;
 struct platform_device;
 struct ep93xxfb_mach_info;
+struct ep93xx_keypad_platform_data;
 
 struct ep93xx_eth_data
 {
@@ -39,6 +40,9 @@ void ep93xx_register_fb(struct ep93xxfb_mach_info *data);
 void ep93xx_register_pwm(int pwm0, int pwm1);
 int ep93xx_pwm_acquire_gpio(struct platform_device *pdev);
 void ep93xx_pwm_release_gpio(struct platform_device *pdev);
+void ep93xx_register_keypad(struct ep93xx_keypad_platform_data *data);
+int ep93xx_keypad_acquire_gpio(struct platform_device *pdev);
+void ep93xx_keypad_release_gpio(struct platform_device *pdev);
 
 void ep93xx_init_devices(void);
 extern struct sys_timer ep93xx_timer;