From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Wed, 28 Jan 2009 12:07:11 +0000 (+0100)
Subject: [ARM] PCM038 board: Add I2C support
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=a4e9a65a1f90e94eca3af1a69b42d039054ef9de;p=openwrt%2Fstaging%2Fblogic.git

[ARM] PCM038 board: Add I2C support

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---

diff --git a/arch/arm/mach-mx2/pcm038.c b/arch/arm/mach-mx2/pcm038.c
index d246eb1bb3ce..7d935e17aa1c 100644
--- a/arch/arm/mach-mx2/pcm038.c
+++ b/arch/arm/mach-mx2/pcm038.c
@@ -21,11 +21,17 @@
 #include <linux/mtd/physmap.h>
 #include <linux/mtd/plat-ram.h>
 #include <linux/io.h>
+#include <linux/i2c.h>
+#include <linux/i2c/at24.h>
+
 #include <asm/mach/arch.h>
 #include <asm/mach-types.h>
 #include <mach/common.h>
 #include <mach/hardware.h>
 #include <mach/iomux.h>
+#ifdef CONFIG_I2C_IMX
+#include <mach/i2c.h>
+#endif
 #include <asm/mach/time.h>
 #include <mach/imx-uart.h>
 #include <mach/board-pcm038.h>
@@ -204,6 +210,51 @@ static void __init pcm038_init_sram(void)
 	__raw_writel(0x22220a00, CSCR_A(1));
 }
 
+#ifdef CONFIG_I2C_IMX
+static int mxc_i2c1_pins[] = {
+	PC5_PF_I2C2_SDA,
+	PC6_PF_I2C2_SCL
+};
+
+static int pcm038_i2c_1_init(struct device *dev)
+{
+	return mxc_gpio_setup_multiple_pins(mxc_i2c1_pins, ARRAY_SIZE(mxc_i2c1_pins),
+			"I2C1");
+}
+
+static void pcm038_i2c_1_exit(struct device *dev)
+{
+	mxc_gpio_release_multiple_pins(mxc_i2c1_pins, ARRAY_SIZE(mxc_i2c1_pins));
+}
+
+static struct imxi2c_platform_data pcm038_i2c_1_data = {
+	.bitrate = 100000,
+	.init = pcm038_i2c_1_init,
+	.exit = pcm038_i2c_1_exit,
+};
+
+static struct at24_platform_data board_eeprom = {
+	.byte_len = 4096,
+	.page_size = 32,
+	.flags = AT24_FLAG_ADDR16,
+};
+
+static struct i2c_board_info pcm038_i2c_devices[] = {
+	[0] = {
+		I2C_BOARD_INFO("at24", 0x52), /* E0=0, E1=1, E2=0 */
+		.platform_data = &board_eeprom,
+	},
+	[1] = {
+		I2C_BOARD_INFO("rtc-pcf8563", 0x51),
+		.type = "pcf8563"
+	},
+	[2] = {
+		I2C_BOARD_INFO("lm75", 0x4a),
+		.type = "lm75"
+	}
+};
+#endif
+
 static void __init pcm038_init(void)
 {
 	gpio_fec_active();
@@ -216,6 +267,14 @@ static void __init pcm038_init(void)
 	mxc_gpio_mode(PE16_AF_OWIRE);
 	mxc_register_device(&mxc_nand_device, &pcm038_nand_board_info);
 
+#ifdef CONFIG_I2C_IMX
+	/* only the i2c master 1 is used on this CPU card */
+	i2c_register_board_info(1, pcm038_i2c_devices,
+				ARRAY_SIZE(pcm038_i2c_devices));
+
+	mxc_register_device(&mxc_i2c_device1, &pcm038_i2c_1_data);
+#endif
+
 	platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
 
 #ifdef CONFIG_MACH_PCM970_BASEBOARD