ARM: S3C64XX: Use module identification for Cragganmore system builds

The Cragganmore system is modular with I2C based identification chips on
the system allowing identification of the system build. Provide a stub I2C
driver which parses the module IDs and uses them to select the appropriate
audio subsystem components to register. To avoid confusion due to having
the mini-driver in the system the driver is placed in a separate file.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-s3c64xx/Kconfig

@@ -288,5 +288,6 @@ config MACH_WLF_CRAGG_6410
 	select S3C_DEV_RTC
 	select S3C64XX_DEV_SPI
 	select S3C24XX_GPIO_EXTRA128
+	select I2C
 	help
 	  Machine support for the Wolfson Cragganmore S3C6410 variant.

arch/arm/mach-s3c64xx/Makefile

@@ -55,7 +55,7 @@ obj-$(CONFIG_MACH_HMT)		+= mach-hmt.o
 obj-$(CONFIG_MACH_SMARTQ)	+= mach-smartq.o
 obj-$(CONFIG_MACH_SMARTQ5)	+= mach-smartq5.o
 obj-$(CONFIG_MACH_SMARTQ7)	+= mach-smartq7.o
-obj-$(CONFIG_MACH_WLF_CRAGG_6410) += mach-crag6410.o
+obj-$(CONFIG_MACH_WLF_CRAGG_6410) += mach-crag6410.o mach-crag6410-module.o
 
 # device support
 

arch/arm/mach-s3c64xx/include/mach/crag6410.h

+/* Cragganmore 6410 shared definitions
+ *
+ * Copyright 2011 Wolfson Microelectronics plc
+ *	Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef MACH_CRAG6410_H
+#define MACH_CRAG6410_H
+
+#include <linux/gpio.h>
+
+#define BANFF_PMIC_IRQ_BASE		IRQ_BOARD_START
+#define GLENFARCLAS_PMIC_IRQ_BASE	(IRQ_BOARD_START + 64)
+
+#define PCA935X_GPIO_BASE		GPIO_BOARD_START
+#define CODEC_GPIO_BASE		(GPIO_BOARD_START + 8)
+#define GLENFARCLAS_PMIC_GPIO_BASE	(GPIO_BOARD_START + 16)
+
+#endif

arch/arm/mach-s3c64xx/mach-crag6410-module.c

+/* Speyside modules for Cragganmore - board data probing
+ *
+ * Copyright 2011 Wolfson Microelectronics plc
+ *	Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+
+#include <linux/mfd/wm831x/irq.h>
+#include <linux/mfd/wm831x/gpio.h>
+
+#include <sound/wm8996.h>
+#include <sound/wm8962.h>
+#include <sound/wm9081.h>
+
+#include <mach/crag6410.h>
+
+static struct wm8996_retune_mobile_config wm8996_retune[] = {
+	{
+		.name = "Sub LPF",
+		.rate = 48000,
+		.regs = {
+			0x6318, 0x6300, 0x1000, 0x0000, 0x0004, 0x2000, 0xF000,
+			0x0000, 0x0004, 0x2000, 0xF000, 0x0000, 0x0004, 0x2000,
+			0xF000, 0x0000, 0x0004, 0x1000, 0x0800, 0x4000
+		},
+	},
+	{
+		.name = "Sub HPF",
+		.rate = 48000,
+		.regs = {
+			0x000A, 0x6300, 0x1000, 0x0000, 0x0004, 0x2000, 0xF000,
+			0x0000, 0x0004, 0x2000, 0xF000, 0x0000, 0x0004, 0x2000,
+			0xF000, 0x0000, 0x0004, 0x1000, 0x0800, 0x4000
+		},
+	},
+};
+
+static struct wm8996_pdata wm8996_pdata __initdata = {
+	.ldo_ena = S3C64XX_GPN(7),
+	.gpio_base = CODEC_GPIO_BASE,
+	.micdet_def = 1,
+	.inl_mode = WM8996_DIFFERRENTIAL_1,
+	.inr_mode = WM8996_DIFFERRENTIAL_1,
+
+	.irq_flags = IRQF_TRIGGER_RISING,
+
+	.gpio_default = {
+		0x8001, /* GPIO1 == ADCLRCLK1 */
+		0x8001, /* GPIO2 == ADCLRCLK2, input due to CPU */
+		0x0141, /* GPIO3 == HP_SEL */
+		0x0002, /* GPIO4 == IRQ */
+		0x020e, /* GPIO5 == CLKOUT */
+	},
+
+	.retune_mobile_cfgs = wm8996_retune,
+	.num_retune_mobile_cfgs = ARRAY_SIZE(wm8996_retune),
+};
+
+static struct wm8962_pdata wm8962_pdata __initdata = {
+	.gpio_init = {
+		0,
+		WM8962_GPIO_FN_OPCLK,
+		WM8962_GPIO_FN_DMICCLK,
+		0,
+		0x8000 | WM8962_GPIO_FN_DMICDAT,
+		WM8962_GPIO_FN_IRQ,    /* Open drain mode */
+	},
+	.irq_active_low = true,
+};
+
+static struct wm9081_pdata wm9081_pdata __initdata = {
+	.irq_high = false,
+	.irq_cmos = false,
+};
+
+static const struct i2c_board_info wm1254_devs[] = {
+	{ I2C_BOARD_INFO("wm8996", 0x1a),
+	  .platform_data = &wm8996_pdata,
+	  .irq = GLENFARCLAS_PMIC_IRQ_BASE + WM831X_IRQ_GPIO_2,
+	},
+	{ I2C_BOARD_INFO("wm9081", 0x6c),
+	  .platform_data = &wm9081_pdata, },
+};
+
+static const struct i2c_board_info wm1259_devs[] = {
+	{ I2C_BOARD_INFO("wm8962", 0x1a),
+	  .platform_data = &wm8962_pdata,
+	  .irq = GLENFARCLAS_PMIC_IRQ_BASE + WM831X_IRQ_GPIO_2,
+	},
+};
+
+
+static __devinitdata const struct {
+	u8 id;
+	const char *name;
+	const struct i2c_board_info *i2c_devs;
+	int num_i2c_devs;
+} gf_mods[] = {
+	{ .id = 0x01, .name = "1250-EV1 Springbank" },
+	{ .id = 0x02, .name = "1251-EV1 Jura" },
+	{ .id = 0x03, .name = "1252-EV1 Glenlivet" },
+	{ .id = 0x11, .name = "6249-EV2 Glenfarclas", },
+	{ .id = 0x21, .name = "1275-EV1 Mortlach" },
+	{ .id = 0x25, .name = "1274-EV1 Glencadam" },
+	{ .id = 0x31, .name = "1253-EV1 Tomatin", },
+	{ .id = 0x39, .name = "1254-EV1 Dallas Dhu",
+	  .i2c_devs = wm1254_devs, .num_i2c_devs = ARRAY_SIZE(wm1254_devs) },
+	{ .id = 0x3a, .name = "1259-EV1 Tobermory",
+	  .i2c_devs = wm1259_devs, .num_i2c_devs = ARRAY_SIZE(wm1259_devs) },
+	{ .id = 0x3b, .name = "1255-EV1 Kilchoman" },
+	{ .id = 0x3c, .name = "1273-EV1 Longmorn" },
+};
+
+static __devinit int wlf_gf_module_probe(struct i2c_client *i2c,
+					 const struct i2c_device_id *i2c_id)
+{
+	int ret, i, j, id, rev;
+
+	ret = i2c_smbus_read_byte_data(i2c, 0);
+	if (ret < 0) {
+		dev_err(&i2c->dev, "Failed to read ID: %d\n", ret);
+		return ret;
+	}
+
+	id = (ret & 0xfe) >> 2;
+	rev = ret & 0x3;
+	for (i = 0; i < ARRAY_SIZE(gf_mods); i++)
+		if (id == gf_mods[i].id)
+			break;
+
+	if (i < ARRAY_SIZE(gf_mods)) {
+		dev_info(&i2c->dev, "%s revision %d\n",
+			 gf_mods[i].name, rev + 1);
+		for (j = 0; j < gf_mods[i].num_i2c_devs; j++) {
+			if (!i2c_new_device(i2c->adapter,
+					    &(gf_mods[i].i2c_devs[j])))
+				dev_err(&i2c->dev,
+					"Failed to register dev: %d\n", ret);
+		}
+	} else {
+		dev_warn(&i2c->dev, "Unknown module ID %d revision %d\n",
+			 id, rev);
+	}
+
+	return 0;
+}
+
+static const struct i2c_device_id wlf_gf_module_id[] = {
+	{ "wlf-gf-module", 0 },
+	{ }
+};
+
+static struct i2c_driver wlf_gf_module_driver = {
+	.driver = {
+		.name = "wlf-gf-module",
+		.owner = THIS_MODULE,
+	},
+	.probe = wlf_gf_module_probe,
+	.id_table = wlf_gf_module_id,
+};
+
+static int __init wlf_gf_module_register(void)
+{
+	return i2c_add_driver(&wlf_gf_module_driver);
+}
+module_init(wlf_gf_module_register);

arch/arm/mach-s3c64xx/mach-crag6410.c

@@ -47,6 +47,7 @@
 #include <mach/regs-sys.h>
 #include <mach/regs-gpio.h>
 #include <mach/regs-modem.h>
+#include <mach/crag6410.h>
 
 #include <mach/regs-gpio-memport.h>
 
@@ -65,17 +66,6 @@
 #include <plat/iic.h>
 #include <plat/pm.h>
 
-#include <sound/wm8996.h>
-#include <sound/wm8962.h>
-#include <sound/wm9081.h>
-
-#define BANFF_PMIC_IRQ_BASE		IRQ_BOARD_START
-#define GLENFARCLAS_PMIC_IRQ_BASE	(IRQ_BOARD_START + 64)
-
-#define PCA935X_GPIO_BASE		GPIO_BOARD_START
-#define CODEC_GPIO_BASE		(GPIO_BOARD_START + 8)
-#define GLENFARCLAS_PMIC_GPIO_BASE	(GPIO_BOARD_START + 16)
-
 /* serial port setup */
 
 #define UCON (S3C2410_UCON_DEFAULT | S3C2410_UCON_UCLK)
@@ -623,81 +613,16 @@ static struct wm831x_pdata glenfarclas_pmic_pdata __initdata = {
 	.disable_touch = true,
 };
 
-static struct wm8996_retune_mobile_config wm8996_retune[] = {
-	{
-		.name = "Sub LPF",
-		.rate = 48000,
-		.regs = {
-			0x6318, 0x6300, 0x1000, 0x0000, 0x0004, 0x2000, 0xF000,
-			0x0000, 0x0004, 0x2000, 0xF000, 0x0000, 0x0004, 0x2000,
-			0xF000, 0x0000, 0x0004, 0x1000, 0x0800, 0x4000
-		},
-	},
-	{
-		.name = "Sub HPF",
-		.rate = 48000,
-		.regs = {
-			0x000A, 0x6300, 0x1000, 0x0000, 0x0004, 0x2000, 0xF000,
-			0x0000, 0x0004, 0x2000, 0xF000, 0x0000, 0x0004, 0x2000,
-			0xF000, 0x0000, 0x0004, 0x1000, 0x0800, 0x4000
-		},
-	},
-};
-
-static struct wm8996_pdata wm8996_pdata __initdata = {
-	.ldo_ena = S3C64XX_GPN(7),
-	.gpio_base = CODEC_GPIO_BASE,
-	.micdet_def = 1,
-	.inl_mode = WM8996_DIFFERRENTIAL_1,
-	.inr_mode = WM8996_DIFFERRENTIAL_1,
-
-	.irq_flags = IRQF_TRIGGER_RISING,
-
-	.gpio_default = {
-		0x8001, /* GPIO1 == ADCLRCLK1 */
-		0x8001, /* GPIO2 == ADCLRCLK2, input due to CPU */
-		0x0141, /* GPIO3 == HP_SEL */
-		0x0002, /* GPIO4 == IRQ */
-		0x020e, /* GPIO5 == CLKOUT */
-	},
-
-	.retune_mobile_cfgs = wm8996_retune,
-	.num_retune_mobile_cfgs = ARRAY_SIZE(wm8996_retune),
-};
-
-static struct wm8962_pdata wm8962_pdata __initdata = {
-	.gpio_init = {
-		0,
-		WM8962_GPIO_FN_OPCLK,
-		WM8962_GPIO_FN_DMICCLK,
-		0,
-		0x8000 | WM8962_GPIO_FN_DMICDAT,
-		WM8962_GPIO_FN_IRQ,    /* Open drain mode */
-	},
-	.irq_active_low = true,
-};
-
-static struct wm9081_pdata wm9081_pdata __initdata = {
-	.irq_high = false,
-	.irq_cmos = false,
-};
-
 static struct i2c_board_info i2c_devs1[] __initdata = {
 	{ I2C_BOARD_INFO("wm8311", 0x34),
 	  .irq = S3C_EINT(0),
 	  .platform_data = &glenfarclas_pmic_pdata },
 
+	{ I2C_BOARD_INFO("wlf-gf-module", 0x24) },
+	{ I2C_BOARD_INFO("wlf-gf-module", 0x25) },
+	{ I2C_BOARD_INFO("wlf-gf-module", 0x26) },
+
 	{ I2C_BOARD_INFO("wm1250-ev1", 0x27) },
-	{ I2C_BOARD_INFO("wm8996", 0x1a),
-	  .platform_data = &wm8996_pdata,
-	  .irq = GLENFARCLAS_PMIC_IRQ_BASE + WM831X_IRQ_GPIO_2,
-	},
-	{ I2C_BOARD_INFO("wm9081", 0x6c),
-	  .platform_data = &wm9081_pdata, },
-	{ I2C_BOARD_INFO("wm8962", 0x1a),
-	  .platform_data = &wm8962_pdata,
-	  .irq = GLENFARCLAS_PMIC_IRQ_BASE + WM831X_IRQ_GPIO_2,
-	},
 };
 
 static void __init crag6410_map_io(void)