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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2009-01-28 14:06:20 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2009-03-13 10:34:13 +0100 |
| commit | b8b19b0d1c2d9ede8a3f8b9f609fd66cf5ede057 (patch) | |
| tree | 72c5f213fd1c7488de88e3d9b4a18e173dd7c7dc /arch/arm | |
| parent | a4e9a65a1f90e94eca3af1a69b42d039054ef9de (diff) | |
| download | linux-3.10-b8b19b0d1c2d9ede8a3f8b9f609fd66cf5ede057.tar.gz linux-3.10-b8b19b0d1c2d9ede8a3f8b9f609fd66cf5ede057.tar.bz2 linux-3.10-b8b19b0d1c2d9ede8a3f8b9f609fd66cf5ede057.zip | |
[ARM] mx1ads: add I2C support
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-mx1/mx1ads.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/arch/arm/mach-mx1/mx1ads.c b/arch/arm/mach-mx1/mx1ads.c index 09dc77bb481..89738fe576b 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 @@ static struct platform_device flash_device = { }; /* + * 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 @@ 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) |