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OpenCloudOS-Kernel
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[ARM] mx1ads: add I2C support 

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2009-01-28 14:06:20 +01:00
parent a4e9a65a1f
commit b8b19b0d1c
1 changed files with 63 additions and 0 deletions
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63
arch/arm/mach-mx1/mx1ads.c
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@ -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"
@ -103,6 +109,55 @@ static struct platform_device flash_device = {
.num_resources = 1,
};
/*
* 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
*/
@ -114,6 +169,14 @@ static void __init mx1ads_init(void)
/* 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)