[ARM] 5311/1: ep93xx: add core support for built in i2c bus

Allow the ep93xx platform init code to register the built-in i2c bus.

The EP93xx processor has two GPIO pins dedicated for an I2C bus. This
patch registers the platform supplied i2c_board_info and the necessary
platform_device information for the i2c-gpio driver to use these pins.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 23 insertions, 0 deletions

diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 48345fb34613..61da67f31ce0 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>
@@ -497,6 +499,26 @@ 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)
diff --git a/arch/arm/mach-ep93xx/include/mach/platform.h b/arch/arm/mach-ep93xx/include/mach/platform.h
index db2489d3bda7..88f7e88f152f 100644
--- a/arch/arm/mach-ep93xx/include/mach/platform.h
+++ b/arch/arm/mach-ep93xx/include/mach/platform.h
@@ -14,6 +14,7 @@ void ep93xx_map_io(void);
 void ep93xx_init_irq(void);
 void ep93xx_init_time(unsigned long);
 void ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr);
+void ep93xx_register_i2c(struct i2c_board_info *devices, int num);
 void ep93xx_init_devices(void);
 extern struct sys_timer ep93xx_timer;