Revert "ARM: sa11x0: Implement autoloading of codec and codec pdata for mcp bus."

This reverts commit 5dd7bf59e0e8563265b3e5b33276099ef628fcc7.

Conflicts:

scripts/mod/file2alias.c

This change is wrong on many levels. First and foremost, it causes a
regression. On boot on Assabet, which this patch gives a codec id of
'ucb1x00', it gives:

ucb1x00 ID not found: 1005

0x1005 is a valid ID for the UCB1300 device.

Secondly, this patch is way over the top in terms of complexity. The
only device which has been seen to be connected with this MCP code is
the UCB1x00 (UCB1200, UCB1300 etc) devices, and they all use the same
driver. Adding a match table, requiring the codec string to match the
hardware ID read out of the ID register, etc is completely over the top
when we can just read the hardware ID register.

arch/arm/mach-sa1100/assabet.c

···
 static struct mcp_plat_data assabet_mcp_data = {
 	.mccr0		= MCCR0_ADM,
 	.sclk_rate	= 11981000,
-	.codec		= "ucb1x00",
 };
 
 static void __init assabet_init(void)

arch/arm/mach-sa1100/cerf.c

···
 static struct mcp_plat_data cerf_mcp_data = {
 	.mccr0		= MCCR0_ADM,
 	.sclk_rate	= 11981000,
-	.codec		= "ucb1x00",
 };
 
 static void __init cerf_init(void)

arch/arm/mach-sa1100/collie.c

···
 #include <linux/timer.h>
 #include <linux/gpio.h>
 #include <linux/pda_power.h>
-#include <linux/mfd/ucb1x00.h>
 
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
···
 	.num_devs	= 1,
 };
 
-static struct ucb1x00_plat_data collie_ucb1x00_data = {
-	.gpio_base	= COLLIE_TC35143_GPIO_BASE,
-};
-
 static struct mcp_plat_data collie_mcp_data = {
 	.mccr0		= MCCR0_ADM | MCCR0_ExtClk,
 	.sclk_rate	= 9216000,
-	.codec		= "ucb1x00",
-	.codec_pdata	= &collie_ucb1x00_data,
+	.gpio_base	= COLLIE_TC35143_GPIO_BASE,
 };
 
 /*

arch/arm/mach-sa1100/include/mach/mcp.h

···
 	u32 mccr1;
 	unsigned int sclk_rate;
 	int gpio_base;
-	const char *codec;
-	void *codec_pdata;
 };
 
 #endif

arch/arm/mach-sa1100/lart.c

···
 static struct mcp_plat_data lart_mcp_data = {
 	.mccr0		= MCCR0_ADM,
 	.sclk_rate	= 11981000,
-	.codec		= "ucb1x00",
 };
 
 static void __init lart_init(void)

arch/arm/mach-sa1100/shannon.c

···
 static struct mcp_plat_data shannon_mcp_data = {
 	.mccr0		= MCCR0_ADM,
 	.sclk_rate	= 11981000,
-	.codec		= "ucb1x00",
 };
 
 static void __init shannon_init(void)

arch/arm/mach-sa1100/simpad.c

···
 #include <linux/mtd/partitions.h>
 #include <linux/io.h>
 #include <linux/gpio.h>
-#include <linux/mfd/ucb1x00.h>
 
 #include <asm/irq.h>
 #include <mach/hardware.h>
···
 	}
 };
 
-static struct ucb1x00_plat_data simpad_ucb1x00_data = {
-	.gpio_base	= SIMPAD_UCB1X00_GPIO_BASE,
-};
-
 static struct mcp_plat_data simpad_mcp_data = {
 	.mccr0		= MCCR0_ADM,
 	.sclk_rate	= 11981000,
-	.codec		= "ucb1300",
-	.codec_pdata	= &simpad_ucb1x00_data,
+	.gpio_base	= SIMPAD_UCB1X00_GPIO_BASE,
 };
 
 

drivers/mfd/mcp-core.c

···
 #define to_mcp(d)		container_of(d, struct mcp, attached_device)
 #define to_mcp_driver(d)	container_of(d, struct mcp_driver, drv)
 
-static const struct mcp_device_id *mcp_match_id(const struct mcp_device_id *id,
-						const char *codec)
-{
-	while (id->name[0]) {
-		if (strcmp(codec, id->name) == 0)
-			return id;
-		id++;
-	}
-	return NULL;
-}
-
-const struct mcp_device_id *mcp_get_device_id(const struct mcp *mcp)
-{
-	const struct mcp_driver *driver =
-		to_mcp_driver(mcp->attached_device.driver);
-
-	return mcp_match_id(driver->id_table, mcp->codec);
-}
-EXPORT_SYMBOL(mcp_get_device_id);
-
 static int mcp_bus_match(struct device *dev, struct device_driver *drv)
 {
-	const struct mcp *mcp = to_mcp(dev);
-	const struct mcp_driver *driver = to_mcp_driver(drv);
-
-	if (driver->id_table)
-		return !!mcp_match_id(driver->id_table, mcp->codec);
-
-	return 0;
+	return 1;
 }
 
 static int mcp_bus_probe(struct device *dev)
···
 	return ret;
 }
 
-static int mcp_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
-{
-	struct mcp *mcp = to_mcp(dev);
-
-	add_uevent_var(env, "MODALIAS=%s%s", MCP_MODULE_PREFIX, mcp->codec);
-	return 0;
-}
-
 static struct bus_type mcp_bus_type = {
 	.name		= "mcp",
 	.match		= mcp_bus_match,
-	.uevent		= mcp_bus_uevent,
 	.probe		= mcp_bus_probe,
 	.remove		= mcp_bus_remove,
 	.suspend	= mcp_bus_suspend,
···
 }
 EXPORT_SYMBOL(mcp_host_alloc);
 
-int mcp_host_register(struct mcp *mcp, void *pdata)
+int mcp_host_register(struct mcp *mcp)
 {
-	if (!mcp->codec)
-		return -EINVAL;
-
-	mcp->attached_device.platform_data = pdata;
 	dev_set_name(&mcp->attached_device, "mcp0");
-	request_module("%s%s", MCP_MODULE_PREFIX, mcp->codec);
 	return device_register(&mcp->attached_device);
 }
 EXPORT_SYMBOL(mcp_host_register);

drivers/mfd/mcp-sa11x0.c

···
 	if (!data)
 		return -ENODEV;
 
-	if (!data->codec)
-		return -ENODEV;
-
 	if (!request_mem_region(0x80060000, 0x60, "sa11x0-mcp"))
 		return -EBUSY;
 
···
 	mcp->dma_audio_wr	= DMA_Ser4MCP0Wr;
 	mcp->dma_telco_rd	= DMA_Ser4MCP1Rd;
 	mcp->dma_telco_wr	= DMA_Ser4MCP1Wr;
-	mcp->codec		= data->codec;
+	mcp->gpio_base		= data->gpio_base;
 
 	platform_set_drvdata(pdev, mcp);
 
···
 	mcp->rw_timeout = (64 * 3 * 1000000 + mcp->sclk_rate - 1) /
 			  mcp->sclk_rate;
 
-	ret = mcp_host_register(mcp, data->codec_pdata);
+	ret = mcp_host_register(mcp);
 	if (ret == 0)
 		goto out;
 

drivers/mfd/ucb1x00-core.c

···
 static LIST_HEAD(ucb1x00_drivers);
 static LIST_HEAD(ucb1x00_devices);
 
-static struct mcp_device_id ucb1x00_id[] = {
-	{ "ucb1x00", 0 },  /* auto-detection */
-	{ "ucb1200", UCB_ID_1200 },
-	{ "ucb1300", UCB_ID_1300 },
-	{ "tc35143", UCB_ID_TC35143 },
-	{ }
-};
-MODULE_DEVICE_TABLE(mcp, ucb1x00_id);
-
 /**
  *	ucb1x00_io_set_dir - set IO direction
  *	@ucb: UCB1x00 structure describing chip
···
 
 static int ucb1x00_probe(struct mcp *mcp)
 {
-	const struct mcp_device_id *mid;
 	struct ucb1x00 *ucb;
 	struct ucb1x00_driver *drv;
-	struct ucb1x00_plat_data *pdata;
 	unsigned int id;
 	int ret = -ENODEV;
 	int temp;
 
 	mcp_enable(mcp);
 	id = mcp_reg_read(mcp, UCB_ID);
-	mid = mcp_get_device_id(mcp);
 
-	if (mid && mid->driver_data) {
-		if (id != mid->driver_data) {
-			printk(KERN_WARNING "%s wrong ID %04x found: %04x\n",
-				mid->name, (unsigned int) mid->driver_data, id);
-			goto err_disable;
-		}
-	} else {
-		mid = &ucb1x00_id[1];
-		while (mid->driver_data) {
-			if (id == mid->driver_data)
-				break;
-			mid++;
-		}
-		printk(KERN_WARNING "%s ID not found: %04x\n",
-			ucb1x00_id[0].name, id);
+	if (id != UCB_ID_1200 && id != UCB_ID_1300 && id != UCB_ID_TC35143) {
+		printk(KERN_WARNING "UCB1x00 ID not found: %04x\n", id);
 		goto err_disable;
 	}
 
···
 	if (!ucb)
 		goto err_disable;
 
-	pdata = mcp->attached_device.platform_data;
+
 	ucb->dev.class = &ucb1x00_class;
 	ucb->dev.parent = &mcp->attached_device;
-	dev_set_name(&ucb->dev, mid->name);
+	dev_set_name(&ucb->dev, "ucb1x00");
 
 	spin_lock_init(&ucb->lock);
 	spin_lock_init(&ucb->io_lock);
 	sema_init(&ucb->adc_sem, 1);
 
-	ucb->id  = mid;
+	ucb->id  = id;
 	ucb->mcp = mcp;
 	ucb->irq = ucb1x00_detect_irq(ucb);
 	if (ucb->irq == NO_IRQ) {
-		printk(KERN_ERR "%s: IRQ probe failed\n", mid->name);
+		printk(KERN_ERR "UCB1x00: IRQ probe failed\n");
 		ret = -ENODEV;
 		goto err_free;
 	}
 
 	ucb->gpio.base = -1;
-	if (pdata && (pdata->gpio_base >= 0)) {
+	if (mcp->gpio_base != 0) {
 		ucb->gpio.label = dev_name(&ucb->dev);
-		ucb->gpio.base = pdata->gpio_base;
+		ucb->gpio.base = mcp->gpio_base;
 		ucb->gpio.ngpio = 10;
 		ucb->gpio.set = ucb1x00_gpio_set;
 		ucb->gpio.get = ucb1x00_gpio_get;
···
 		dev_info(&ucb->dev, "gpio_base not set so no gpiolib support");
 
 	ret = request_irq(ucb->irq, ucb1x00_irq, IRQF_TRIGGER_RISING,
-			  mid->name, ucb);
+			  "UCB1x00", ucb);
 	if (ret) {
-		printk(KERN_ERR "%s: unable to grab irq%d: %d\n",
-			mid->name, ucb->irq, ret);
+		printk(KERN_ERR "ucb1x00: unable to grab irq%d: %d\n",
+			ucb->irq, ret);
 		goto err_gpio;
 	}
 
···
 	.remove		= ucb1x00_remove,
 	.suspend	= ucb1x00_suspend,
 	.resume		= ucb1x00_resume,
-	.id_table	= ucb1x00_id,
 };
 
 static int __init ucb1x00_init(void)

drivers/mfd/ucb1x00-ts.c

···
 	ts->adcsync = adcsync ? UCB_SYNC : UCB_NOSYNC;
 
 	idev->name       = "Touchscreen panel";
-	idev->id.product = ts->ucb->id->driver_data;
+	idev->id.product = ts->ucb->id;
 	idev->open       = ucb1x00_ts_open;
 	idev->close      = ucb1x00_ts_close;
 

include/linux/mfd/mcp.h

···
 #ifndef MCP_H
 #define MCP_H
 
-#include <linux/mod_devicetable.h>
 #include <mach/dma.h>
 
 struct mcp_ops;
···
 	dma_device_t	dma_telco_rd;
 	dma_device_t	dma_telco_wr;
 	struct device	attached_device;
-	const char	*codec;
+	int		gpio_base;
 };
 
 struct mcp_ops {
···
 unsigned int mcp_reg_read(struct mcp *, unsigned int);
 void mcp_enable(struct mcp *);
 void mcp_disable(struct mcp *);
-const struct mcp_device_id *mcp_get_device_id(const struct mcp *mcp);
 #define mcp_get_sclk_rate(mcp)	((mcp)->sclk_rate)
 
 struct mcp *mcp_host_alloc(struct device *, size_t);
-int mcp_host_register(struct mcp *, void *);
+int mcp_host_register(struct mcp *);
 void mcp_host_unregister(struct mcp *);
 
 struct mcp_driver {
···
 	void (*remove)(struct mcp *);
 	int (*suspend)(struct mcp *, pm_message_t);
 	int (*resume)(struct mcp *);
-	const struct mcp_device_id *id_table;
 };
 
 int mcp_driver_register(struct mcp_driver *);

include/linux/mfd/ucb1x00.h

···
 #define UCB_MODE_DYN_VFLAG_ENA	(1 << 12)
 #define UCB_MODE_AUD_OFF_CAN	(1 << 13)
 
-struct ucb1x00_plat_data {
-	int		gpio_base;
-};
 
 struct ucb1x00_irq {
 	void *devid;
···
 	unsigned int		irq;
 	struct semaphore	adc_sem;
 	spinlock_t		io_lock;
-	const struct mcp_device_id *id;
+	u16			id;
 	u16			io_dir;
 	u16			io_out;
 	u16			adc_cr;

include/linux/mod_devicetable.h

···
 			__attribute__((aligned(sizeof(kernel_ulong_t))));
 };
 
-/* mcp */
-
-#define MCP_NAME_SIZE	20
-#define MCP_MODULE_PREFIX "mcp:"
-
-struct mcp_device_id {
-	char name[MCP_NAME_SIZE];
-	kernel_ulong_t driver_data	/* Data private to the driver */
-			__attribute__((aligned(sizeof(kernel_ulong_t))));
-};
-
 /* dmi */
 enum dmi_field {
 	DMI_NONE,

scripts/mod/file2alias.c

···
 }
 ADD_TO_DEVTABLE("spi", struct spi_device_id, do_spi_entry);
 
-/* Looks like: mcp:S */
-static int do_mcp_entry(const char *filename, struct mcp_device_id *id,
-			char *alias)
-{
-	sprintf(alias, MCP_MODULE_PREFIX "%s", id->name);
-
-	return 1;
-}
-ADD_TO_DEVTABLE("mcp", struct mcp_device_id, do_mcp_entry); 
-
 static const struct dmifield {
 	const char *prefix;
 	int field;