[ARM] mx1ads: add I2C support
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-mx1/mx1ads.c b/arch/arm/mach-mx1/mx1ads.c
index 09dc77b..89738fe 100644
--- a/arch/arm/mach-mx1/mx1ads.c
+++ b/arch/arm/mach-mx1/mx1ads.c
@@ -16,6 +16,8 @@
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/mtd/physmap.h>
+#include <linux/i2c.h>
+#include <linux/i2c/pcf857x.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
@@ -24,6 +26,10 @@
#include <mach/hardware.h>
#include <mach/common.h>
#include <mach/imx-uart.h>
+#include <mach/irqs.h>
+#ifdef CONFIG_I2C_IMX
+#include <mach/i2c.h>
+#endif
#include <mach/iomux.h>
#include "devices.h"
@@ -104,6 +110,55 @@
};
/*
+ * I2C
+ */
+
+#ifdef CONFIG_I2C_IMX
+static int i2c_pins[] = {
+ PA15_PF_I2C_SDA,
+ PA16_PF_I2C_SCL,
+};
+
+static int i2c_init(struct device *dev)
+{
+ return mxc_gpio_setup_multiple_pins(i2c_pins,
+ ARRAY_SIZE(i2c_pins), "I2C");
+}
+
+static void i2c_exit(struct device *dev)
+{
+ mxc_gpio_release_multiple_pins(i2c_pins,
+ ARRAY_SIZE(i2c_pins));
+}
+
+static struct pcf857x_platform_data pcf857x_data[] = {
+ {
+ .gpio_base = 4 * 32,
+ }, {
+ .gpio_base = 4 * 32 + 16,
+ }
+};
+
+static struct imxi2c_platform_data mx1ads_i2c_data = {
+ .bitrate = 100000,
+ .init = i2c_init,
+ .exit = i2c_exit,
+};
+
+static struct i2c_board_info mx1ads_i2c_devices[] = {
+ {
+ I2C_BOARD_INFO("pcf857x", 0x22),
+ .type = "pcf8575",
+ .platform_data = &pcf857x_data[0],
+ }, {
+ I2C_BOARD_INFO("pcf857x", 0x24),
+ .type = "pcf8575",
+ .platform_data = &pcf857x_data[1],
+ },
+};
+#endif
+
+/*
* Board init
*/
static void __init mx1ads_init(void)
@@ -114,6 +169,14 @@
/* Physmap flash */
mxc_register_device(&flash_device, &mx1ads_flash_data);
+
+ /* I2C */
+#ifdef CONFIG_I2C_IMX
+ i2c_register_board_info(0, mx1ads_i2c_devices,
+ ARRAY_SIZE(mx1ads_i2c_devices));
+
+ mxc_register_device(&imx_i2c_device, &mx1ads_i2c_data);
+#endif
}
static void __init mx1ads_timer_init(void)