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Diffstat (limited to 'arch/arm/mach-ep93xx/core.c')
-rw-r--r--arch/arm/mach-ep93xx/core.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 48345fb3461..4781f323703 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -34,6 +34,8 @@
#include <linux/amba/bus.h>
#include <linux/amba/serial.h>
#include <linux/io.h>
+#include <linux/i2c.h>
+#include <linux/i2c-gpio.h>
#include <asm/types.h>
#include <asm/setup.h>
@@ -153,12 +155,14 @@ static unsigned char gpio_int_unmasked[3];
static unsigned char gpio_int_enabled[3];
static unsigned char gpio_int_type1[3];
static unsigned char gpio_int_type2[3];
+static unsigned char gpio_int_debouce[3];
/* Port ordering is: A B F */
static const u8 int_type1_register_offset[3] = { 0x90, 0xac, 0x4c };
static const u8 int_type2_register_offset[3] = { 0x94, 0xb0, 0x50 };
static const u8 eoi_register_offset[3] = { 0x98, 0xb4, 0x54 };
static const u8 int_en_register_offset[3] = { 0x9c, 0xb8, 0x58 };
+static const u8 int_debounce_register_offset[3] = { 0xa8, 0xc4, 0x64 };
void ep93xx_gpio_update_int_params(unsigned port)
{
@@ -181,6 +185,22 @@ void ep93xx_gpio_int_mask(unsigned line)
gpio_int_unmasked[line >> 3] &= ~(1 << (line & 7));
}
+void ep93xx_gpio_int_debounce(unsigned int irq, int enable)
+{
+ int line = irq_to_gpio(irq);
+ int port = line >> 3;
+ int port_mask = 1 << (line & 7);
+
+ if (enable)
+ gpio_int_debouce[port] |= port_mask;
+ else
+ gpio_int_debouce[port] &= ~port_mask;
+
+ __raw_writeb(gpio_int_debouce[port],
+ EP93XX_GPIO_REG(int_debounce_register_offset[port]));
+}
+EXPORT_SYMBOL(ep93xx_gpio_int_debounce);
+
/*************************************************************************
* EP93xx IRQ handling
*************************************************************************/
@@ -497,6 +517,26 @@ void __init ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr)
platform_device_register(&ep93xx_eth_device);
}
+static struct i2c_gpio_platform_data ep93xx_i2c_data = {
+ .sda_pin = EP93XX_GPIO_LINE_EEDAT,
+ .sda_is_open_drain = 0,
+ .scl_pin = EP93XX_GPIO_LINE_EECLK,
+ .scl_is_open_drain = 0,
+ .udelay = 2,
+};
+
+static struct platform_device ep93xx_i2c_device = {
+ .name = "i2c-gpio",
+ .id = 0,
+ .dev.platform_data = &ep93xx_i2c_data,
+};
+
+void __init ep93xx_register_i2c(struct i2c_board_info *devices, int num)
+{
+ i2c_register_board_info(0, devices, num);
+ platform_device_register(&ep93xx_i2c_device);
+}
+
extern void ep93xx_gpio_init(void);
void __init ep93xx_init_devices(void)