diff options
Diffstat (limited to 'arch/arm/mach-ep93xx/core.c')
| -rw-r--r-- | arch/arm/mach-ep93xx/core.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c index 48345fb34613..4781f323703b 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) |