[ARM] mx1ads: add I2C support (b8b19b0d) · Commits · e / devices / android_kernel_fairphone_FP5

arch/arm/mach-mx1/mx1ads.c

+63 −0

Original line number	Diff line number	Diff line
		@@ -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)