X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fopenwrt.git;a=blobdiff_plain;f=target%2Flinux%2Fgeneric-2.6%2Fpatches-2.6.35%2F922-gpiommc.patch;fp=target%2Flinux%2Fgeneric-2.6%2Fpatches-2.6.35%2F922-gpiommc.patch;h=0000000000000000000000000000000000000000;hp=24e5d592e8ab778b674c9eddc923af5ce42986b1;hb=da1bb88a2b900f0392b731ec47c5e1bff956fd8f;hpb=6117c04c9416b295347fb45c37e430f01df1d0d9

diff --git a/target/linux/generic-2.6/patches-2.6.35/922-gpiommc.patch b/target/linux/generic-2.6/patches-2.6.35/922-gpiommc.patch
deleted file mode 100644
index 24e5d592e8..0000000000
--- a/target/linux/generic-2.6/patches-2.6.35/922-gpiommc.patch
+++ /dev/null
@@ -1,843 +0,0 @@
---- /dev/null
-+++ b/drivers/mmc/host/gpiommc.c
-@@ -0,0 +1,608 @@
-+/*
-+ * Driver an MMC/SD card on a bitbanging GPIO SPI bus.
-+ * This module hooks up the mmc_spi and spi_gpio modules and also
-+ * provides a configfs interface.
-+ *
-+ * Copyright 2008 Michael Buesch <mb@bu3sch.de>
-+ *
-+ * Licensed under the GNU/GPL. See COPYING for details.
-+ */
-+
-+#include <linux/mmc/gpiommc.h>
-+#include <linux/platform_device.h>
-+#include <linux/list.h>
-+#include <linux/mutex.h>
-+#include <linux/spi/spi_gpio_old.h>
-+#include <linux/configfs.h>
-+#include <linux/gpio.h>
-+#include <asm/atomic.h>
-+
-+
-+#define PFX				"gpio-mmc: "
-+
-+
-+struct gpiommc_device {
-+	struct platform_device *pdev;
-+	struct platform_device *spi_pdev;
-+	struct spi_board_info boardinfo;
-+};
-+
-+
-+MODULE_DESCRIPTION("GPIO based MMC driver");
-+MODULE_AUTHOR("Michael Buesch");
-+MODULE_LICENSE("GPL");
-+
-+
-+static int gpiommc_boardinfo_setup(struct spi_board_info *bi,
-+				   struct spi_master *master,
-+				   void *data)
-+{
-+	struct gpiommc_device *d = data;
-+	struct gpiommc_platform_data *pdata = d->pdev->dev.platform_data;
-+
-+	/* Bind the SPI master to the MMC-SPI host driver. */
-+	strlcpy(bi->modalias, "mmc_spi", sizeof(bi->modalias));
-+
-+	bi->max_speed_hz = pdata->max_bus_speed;
-+	bi->bus_num = master->bus_num;
-+	bi->mode = pdata->mode;
-+
-+	return 0;
-+}
-+
-+static int gpiommc_probe(struct platform_device *pdev)
-+{
-+	struct gpiommc_platform_data *mmc_pdata = pdev->dev.platform_data;
-+	struct spi_gpio_platform_data spi_pdata;
-+	struct gpiommc_device *d;
-+	int err;
-+
-+	err = -ENXIO;
-+	if (!mmc_pdata)
-+		goto error;
-+
-+#ifdef CONFIG_MMC_SPI_MODULE
-+	err = request_module("mmc_spi");
-+	if (err) {
-+		printk(KERN_WARNING PFX
-+		       "Failed to request mmc_spi module.\n");
-+	}
-+#endif /* CONFIG_MMC_SPI_MODULE */
-+
-+	/* Allocate the GPIO-MMC device */
-+	err = -ENOMEM;
-+	d = kzalloc(sizeof(*d), GFP_KERNEL);
-+	if (!d)
-+		goto error;
-+	d->pdev = pdev;
-+
-+	/* Create the SPI-GPIO device */
-+	d->spi_pdev = platform_device_alloc(SPI_GPIO_PLATDEV_NAME,
-+					    spi_gpio_next_id());
-+	if (!d->spi_pdev)
-+		goto err_free_d;
-+
-+	memset(&spi_pdata, 0, sizeof(spi_pdata));
-+	spi_pdata.pin_clk = mmc_pdata->pins.gpio_clk;
-+	spi_pdata.pin_miso = mmc_pdata->pins.gpio_do;
-+	spi_pdata.pin_mosi = mmc_pdata->pins.gpio_di;
-+	spi_pdata.pin_cs = mmc_pdata->pins.gpio_cs;
-+	spi_pdata.cs_activelow = mmc_pdata->pins.cs_activelow;
-+	spi_pdata.no_spi_delay = mmc_pdata->no_spi_delay;
-+	spi_pdata.boardinfo_setup = gpiommc_boardinfo_setup;
-+	spi_pdata.boardinfo_setup_data = d;
-+
-+	err = platform_device_add_data(d->spi_pdev, &spi_pdata,
-+				       sizeof(spi_pdata));
-+	if (err)
-+		goto err_free_pdev;
-+	err = platform_device_add(d->spi_pdev);
-+	if (err)
-+		goto err_free_pdata;
-+	platform_set_drvdata(pdev, d);
-+
-+	printk(KERN_INFO PFX "MMC-Card \"%s\" "
-+	       "attached to GPIO pins di=%u, do=%u, clk=%u, cs=%u\n",
-+	       mmc_pdata->name, mmc_pdata->pins.gpio_di,
-+	       mmc_pdata->pins.gpio_do,
-+	       mmc_pdata->pins.gpio_clk,
-+	       mmc_pdata->pins.gpio_cs);
-+
-+	return 0;
-+
-+err_free_pdata:
-+	kfree(d->spi_pdev->dev.platform_data);
-+	d->spi_pdev->dev.platform_data = NULL;
-+err_free_pdev:
-+	platform_device_put(d->spi_pdev);
-+err_free_d:
-+	kfree(d);
-+error:
-+	return err;
-+}
-+
-+static int gpiommc_remove(struct platform_device *pdev)
-+{
-+	struct gpiommc_device *d = platform_get_drvdata(pdev);
-+	struct gpiommc_platform_data *pdata = d->pdev->dev.platform_data;
-+
-+	platform_device_unregister(d->spi_pdev);
-+	printk(KERN_INFO PFX "GPIO based MMC-Card \"%s\" removed\n",
-+	       pdata->name);
-+	platform_device_put(d->spi_pdev);
-+
-+	return 0;
-+}
-+
-+#ifdef CONFIG_GPIOMMC_CONFIGFS
-+
-+/* A device that was created through configfs */
-+struct gpiommc_configfs_device {
-+	struct config_item item;
-+	/* The platform device, after registration. */
-+	struct platform_device *pdev;
-+	/* The configuration */
-+	struct gpiommc_platform_data pdata;
-+};
-+
-+#define GPIO_INVALID	-1
-+
-+static inline bool gpiommc_is_registered(struct gpiommc_configfs_device *dev)
-+{
-+	return (dev->pdev != NULL);
-+}
-+
-+static inline struct gpiommc_configfs_device *ci_to_gpiommc(struct config_item *item)
-+{
-+	return item ? container_of(item, struct gpiommc_configfs_device, item) : NULL;
-+}
-+
-+static struct configfs_attribute gpiommc_attr_DI = {
-+	.ca_owner = THIS_MODULE,
-+	.ca_name = "gpio_data_in",
-+	.ca_mode = S_IRUGO | S_IWUSR,
-+};
-+
-+static struct configfs_attribute gpiommc_attr_DO = {
-+	.ca_owner = THIS_MODULE,
-+	.ca_name = "gpio_data_out",
-+	.ca_mode = S_IRUGO | S_IWUSR,
-+};
-+
-+static struct configfs_attribute gpiommc_attr_CLK = {
-+	.ca_owner = THIS_MODULE,
-+	.ca_name = "gpio_clock",
-+	.ca_mode = S_IRUGO | S_IWUSR,
-+};
-+
-+static struct configfs_attribute gpiommc_attr_CS = {
-+	.ca_owner = THIS_MODULE,
-+	.ca_name = "gpio_chipselect",
-+	.ca_mode = S_IRUGO | S_IWUSR,
-+};
-+
-+static struct configfs_attribute gpiommc_attr_CS_activelow = {
-+	.ca_owner = THIS_MODULE,
-+	.ca_name = "gpio_chipselect_activelow",
-+	.ca_mode = S_IRUGO | S_IWUSR,
-+};
-+
-+static struct configfs_attribute gpiommc_attr_spimode = {
-+	.ca_owner = THIS_MODULE,
-+	.ca_name = "spi_mode",
-+	.ca_mode = S_IRUGO | S_IWUSR,
-+};
-+
-+static struct configfs_attribute gpiommc_attr_spidelay = {
-+	.ca_owner = THIS_MODULE,
-+	.ca_name = "spi_delay",
-+	.ca_mode = S_IRUGO | S_IWUSR,
-+};
-+
-+static struct configfs_attribute gpiommc_attr_max_bus_speed = {
-+	.ca_owner = THIS_MODULE,
-+	.ca_name = "max_bus_speed",
-+	.ca_mode = S_IRUGO | S_IWUSR,
-+};
-+
-+static struct configfs_attribute gpiommc_attr_register = {
-+	.ca_owner = THIS_MODULE,
-+	.ca_name = "register",
-+	.ca_mode = S_IRUGO | S_IWUSR,
-+};
-+
-+static struct configfs_attribute *gpiommc_config_attrs[] = {
-+	&gpiommc_attr_DI,
-+	&gpiommc_attr_DO,
-+	&gpiommc_attr_CLK,
-+	&gpiommc_attr_CS,
-+	&gpiommc_attr_CS_activelow,
-+	&gpiommc_attr_spimode,
-+	&gpiommc_attr_spidelay,
-+	&gpiommc_attr_max_bus_speed,
-+	&gpiommc_attr_register,
-+	NULL,
-+};
-+
-+static ssize_t gpiommc_config_attr_show(struct config_item *item,
-+					struct configfs_attribute *attr,
-+					char *page)
-+{
-+	struct gpiommc_configfs_device *dev = ci_to_gpiommc(item);
-+	ssize_t count = 0;
-+	unsigned int gpio;
-+	int err = 0;
-+
-+	if (attr == &gpiommc_attr_DI) {
-+		gpio = dev->pdata.pins.gpio_di;
-+		if (gpio == GPIO_INVALID)
-+			count = snprintf(page, PAGE_SIZE, "not configured\n");
-+		else
-+			count = snprintf(page, PAGE_SIZE, "%u\n", gpio);
-+		goto out;
-+	}
-+	if (attr == &gpiommc_attr_DO) {
-+		gpio = dev->pdata.pins.gpio_do;
-+		if (gpio == GPIO_INVALID)
-+			count = snprintf(page, PAGE_SIZE, "not configured\n");
-+		else
-+			count = snprintf(page, PAGE_SIZE, "%u\n", gpio);
-+		goto out;
-+	}
-+	if (attr == &gpiommc_attr_CLK) {
-+		gpio = dev->pdata.pins.gpio_clk;
-+		if (gpio == GPIO_INVALID)
-+			count = snprintf(page, PAGE_SIZE, "not configured\n");
-+		else
-+			count = snprintf(page, PAGE_SIZE, "%u\n", gpio);
-+		goto out;
-+	}
-+	if (attr == &gpiommc_attr_CS) {
-+		gpio = dev->pdata.pins.gpio_cs;
-+		if (gpio == GPIO_INVALID)
-+			count = snprintf(page, PAGE_SIZE, "not configured\n");
-+		else
-+			count = snprintf(page, PAGE_SIZE, "%u\n", gpio);
-+		goto out;
-+	}
-+	if (attr == &gpiommc_attr_CS_activelow) {
-+		count = snprintf(page, PAGE_SIZE, "%u\n",
-+				 dev->pdata.pins.cs_activelow);
-+		goto out;
-+	}
-+	if (attr == &gpiommc_attr_spimode) {
-+		count = snprintf(page, PAGE_SIZE, "%u\n",
-+				 dev->pdata.mode);
-+		goto out;
-+	}
-+	if (attr == &gpiommc_attr_spidelay) {
-+		count = snprintf(page, PAGE_SIZE, "%u\n",
-+				 !dev->pdata.no_spi_delay);
-+		goto out;
-+	}
-+	if (attr == &gpiommc_attr_max_bus_speed) {
-+		count = snprintf(page, PAGE_SIZE, "%u\n",
-+				 dev->pdata.max_bus_speed);
-+		goto out;
-+	}
-+	if (attr == &gpiommc_attr_register) {
-+		count = snprintf(page, PAGE_SIZE, "%u\n",
-+				 gpiommc_is_registered(dev));
-+		goto out;
-+	}
-+	WARN_ON(1);
-+	err = -ENOSYS;
-+out:
-+	return err ? err : count;
-+}
-+
-+static int gpiommc_do_register(struct gpiommc_configfs_device *dev,
-+			       const char *name)
-+{
-+	int err;
-+
-+	if (gpiommc_is_registered(dev))
-+		return 0;
-+
-+	if (!gpio_is_valid(dev->pdata.pins.gpio_di) ||
-+	    !gpio_is_valid(dev->pdata.pins.gpio_do) ||
-+	    !gpio_is_valid(dev->pdata.pins.gpio_clk) ||
-+	    !gpio_is_valid(dev->pdata.pins.gpio_cs)) {
-+		printk(KERN_ERR PFX
-+		       "configfs: Invalid GPIO pin number(s)\n");
-+		return -EINVAL;
-+	}
-+
-+	strlcpy(dev->pdata.name, name,
-+		sizeof(dev->pdata.name));
-+
-+	dev->pdev = platform_device_alloc(GPIOMMC_PLATDEV_NAME,
-+					  gpiommc_next_id());
-+	if (!dev->pdev)
-+		return -ENOMEM;
-+	err = platform_device_add_data(dev->pdev, &dev->pdata,
-+				       sizeof(dev->pdata));
-+	if (err) {
-+		platform_device_put(dev->pdev);
-+		return err;
-+	}
-+	err = platform_device_add(dev->pdev);
-+	if (err) {
-+		platform_device_put(dev->pdev);
-+		return err;
-+	}
-+
-+	return 0;
-+}
-+
-+static void gpiommc_do_unregister(struct gpiommc_configfs_device *dev)
-+{
-+	if (!gpiommc_is_registered(dev))
-+		return;
-+
-+	platform_device_unregister(dev->pdev);
-+	dev->pdev = NULL;
-+}
-+
-+static ssize_t gpiommc_config_attr_store(struct config_item *item,
-+					 struct configfs_attribute *attr,
-+					 const char *page, size_t count)
-+{
-+	struct gpiommc_configfs_device *dev = ci_to_gpiommc(item);
-+	int err = -EINVAL;
-+	unsigned long data;
-+
-+	if (attr == &gpiommc_attr_register) {
-+		err = strict_strtoul(page, 10, &data);
-+		if (err)
-+			goto out;
-+		err = -EINVAL;
-+		if (data == 1)
-+			err = gpiommc_do_register(dev, item->ci_name);
-+		if (data == 0) {
-+			gpiommc_do_unregister(dev);
-+			err = 0;
-+		}
-+		goto out;
-+	}
-+
-+	if (gpiommc_is_registered(dev)) {
-+		/* The rest of the config parameters can only be set
-+		 * as long as the device is not registered, yet. */
-+		err = -EBUSY;
-+		goto out;
-+	}
-+
-+	if (attr == &gpiommc_attr_DI) {
-+		err = strict_strtoul(page, 10, &data);
-+		if (err)
-+			goto out;
-+		err = -EINVAL;
-+		if (!gpio_is_valid(data))
-+			goto out;
-+		dev->pdata.pins.gpio_di = data;
-+		err = 0;
-+		goto out;
-+	}
-+	if (attr == &gpiommc_attr_DO) {
-+		err = strict_strtoul(page, 10, &data);
-+		if (err)
-+			goto out;
-+		err = -EINVAL;
-+		if (!gpio_is_valid(data))
-+			goto out;
-+		dev->pdata.pins.gpio_do = data;
-+		err = 0;
-+		goto out;
-+	}
-+	if (attr == &gpiommc_attr_CLK) {
-+		err = strict_strtoul(page, 10, &data);
-+		if (err)
-+			goto out;
-+		err = -EINVAL;
-+		if (!gpio_is_valid(data))
-+			goto out;
-+		dev->pdata.pins.gpio_clk = data;
-+		err = 0;
-+		goto out;
-+	}
-+	if (attr == &gpiommc_attr_CS) {
-+		err = strict_strtoul(page, 10, &data);
-+		if (err)
-+			goto out;
-+		err = -EINVAL;
-+		if (!gpio_is_valid(data))
-+			goto out;
-+		dev->pdata.pins.gpio_cs = data;
-+		err = 0;
-+		goto out;
-+	}
-+	if (attr == &gpiommc_attr_CS_activelow) {
-+		err = strict_strtoul(page, 10, &data);
-+		if (err)
-+			goto out;
-+		err = -EINVAL;
-+		if (data != 0 && data != 1)
-+			goto out;
-+		dev->pdata.pins.cs_activelow = data;
-+		err = 0;
-+		goto out;
-+	}
-+	if (attr == &gpiommc_attr_spimode) {
-+		err = strict_strtoul(page, 10, &data);
-+		if (err)
-+			goto out;
-+		err = -EINVAL;
-+		switch (data) {
-+		case 0:
-+			dev->pdata.mode = SPI_MODE_0;
-+			break;
-+		case 1:
-+			dev->pdata.mode = SPI_MODE_1;
-+			break;
-+		case 2:
-+			dev->pdata.mode = SPI_MODE_2;
-+			break;
-+		case 3:
-+			dev->pdata.mode = SPI_MODE_3;
-+			break;
-+		default:
-+			goto out;
-+		}
-+		err = 0;
-+		goto out;
-+	}
-+	if (attr == &gpiommc_attr_spidelay) {
-+		err = strict_strtoul(page, 10, &data);
-+		if (err)
-+			goto out;
-+		err = -EINVAL;
-+		if (data != 0 && data != 1)
-+			goto out;
-+		dev->pdata.no_spi_delay = !data;
-+		err = 0;
-+		goto out;
-+	}
-+	if (attr == &gpiommc_attr_max_bus_speed) {
-+		err = strict_strtoul(page, 10, &data);
-+		if (err)
-+			goto out;
-+		err = -EINVAL;
-+		if (data > UINT_MAX)
-+			goto out;
-+		dev->pdata.max_bus_speed = data;
-+		err = 0;
-+		goto out;
-+	}
-+	WARN_ON(1);
-+	err = -ENOSYS;
-+out:
-+	return err ? err : count;
-+}
-+
-+static void gpiommc_config_item_release(struct config_item *item)
-+{
-+	struct gpiommc_configfs_device *dev = ci_to_gpiommc(item);
-+
-+	kfree(dev);
-+}
-+
-+static struct configfs_item_operations gpiommc_config_item_ops = {
-+	.release		= gpiommc_config_item_release,
-+	.show_attribute		= gpiommc_config_attr_show,
-+	.store_attribute	= gpiommc_config_attr_store,
-+};
-+
-+static struct config_item_type gpiommc_dev_ci_type = {
-+	.ct_item_ops	= &gpiommc_config_item_ops,
-+	.ct_attrs	= gpiommc_config_attrs,
-+	.ct_owner	= THIS_MODULE,
-+};
-+
-+static struct config_item *gpiommc_make_item(struct config_group *group,
-+					     const char *name)
-+{
-+	struct gpiommc_configfs_device *dev;
-+
-+	if (strlen(name) > GPIOMMC_MAX_NAMELEN) {
-+		printk(KERN_ERR PFX "configfs: device name too long\n");
-+		return NULL;
-+	}
-+
-+	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
-+	if (!dev)
-+		return NULL;
-+
-+	config_item_init_type_name(&dev->item, name,
-+				   &gpiommc_dev_ci_type);
-+
-+	/* Assign default configuration */
-+	dev->pdata.pins.gpio_di = GPIO_INVALID;
-+	dev->pdata.pins.gpio_do = GPIO_INVALID;
-+	dev->pdata.pins.gpio_clk = GPIO_INVALID;
-+	dev->pdata.pins.gpio_cs = GPIO_INVALID;
-+	dev->pdata.pins.cs_activelow = 1;
-+	dev->pdata.mode = SPI_MODE_0;
-+	dev->pdata.no_spi_delay = 0;
-+	dev->pdata.max_bus_speed = 5000000; /* 5 MHz */
-+
-+	return &(dev->item);
-+}
-+
-+static void gpiommc_drop_item(struct config_group *group,
-+			      struct config_item *item)
-+{
-+	struct gpiommc_configfs_device *dev = ci_to_gpiommc(item);
-+
-+	gpiommc_do_unregister(dev);
-+	kfree(dev);
-+}
-+
-+static struct configfs_group_operations gpiommc_ct_group_ops = {
-+	.make_item	= gpiommc_make_item,
-+	.drop_item	= gpiommc_drop_item,
-+};
-+
-+static struct config_item_type gpiommc_ci_type = {
-+	.ct_group_ops	= &gpiommc_ct_group_ops,
-+	.ct_owner	= THIS_MODULE,
-+};
-+
-+static struct configfs_subsystem gpiommc_subsys = {
-+	.su_group = {
-+		.cg_item = {
-+			.ci_namebuf = GPIOMMC_PLATDEV_NAME,
-+			.ci_type = &gpiommc_ci_type,
-+		},
-+	},
-+	.su_mutex = __MUTEX_INITIALIZER(gpiommc_subsys.su_mutex),
-+};
-+
-+#endif /* CONFIG_GPIOMMC_CONFIGFS */
-+
-+static struct platform_driver gpiommc_plat_driver = {
-+	.probe	= gpiommc_probe,
-+	.remove	= gpiommc_remove,
-+	.driver	= {
-+		.name	= GPIOMMC_PLATDEV_NAME,
-+		.owner	= THIS_MODULE,
-+	},
-+};
-+
-+int gpiommc_next_id(void)
-+{
-+	static atomic_t counter = ATOMIC_INIT(-1);
-+
-+	return atomic_inc_return(&counter);
-+}
-+EXPORT_SYMBOL(gpiommc_next_id);
-+
-+static int __init gpiommc_modinit(void)
-+{
-+	int err;
-+
-+	err = platform_driver_register(&gpiommc_plat_driver);
-+	if (err)
-+		return err;
-+
-+#ifdef CONFIG_GPIOMMC_CONFIGFS
-+	config_group_init(&gpiommc_subsys.su_group);
-+	err = configfs_register_subsystem(&gpiommc_subsys);
-+	if (err) {
-+		platform_driver_unregister(&gpiommc_plat_driver);
-+		return err;
-+	}
-+#endif /* CONFIG_GPIOMMC_CONFIGFS */
-+
-+	return 0;
-+}
-+module_init(gpiommc_modinit);
-+
-+static void __exit gpiommc_modexit(void)
-+{
-+#ifdef CONFIG_GPIOMMC_CONFIGFS
-+	configfs_unregister_subsystem(&gpiommc_subsys);
-+#endif
-+	platform_driver_unregister(&gpiommc_plat_driver);
-+}
-+module_exit(gpiommc_modexit);
---- a/drivers/mmc/host/Kconfig
-+++ b/drivers/mmc/host/Kconfig
-@@ -370,6 +370,31 @@ config MMC_TMIO
- 	  This provides support for the SD/MMC cell found in TC6393XB,
- 	  T7L66XB and also HTC ASIC3
- 
-+config GPIOMMC
-+	tristate "MMC/SD over GPIO-based SPI"
-+	depends on MMC && MMC_SPI && SPI_GPIO_OLD
-+	help
-+	  This driver hooks up the mmc_spi and spi_gpio modules so that
-+	  MMC/SD cards can be used on a GPIO based bus by bitbanging
-+	  the SPI protocol in software.
-+
-+	  This driver provides a configfs interface to dynamically create
-+	  and destroy GPIO-based MMC/SD card devices. It also provides
-+	  a platform device interface API.
-+	  See Documentation/gpiommc.txt for details.
-+
-+	  The module will be called gpiommc.
-+
-+	  If unsure, say N.
-+
-+config GPIOMMC_CONFIGFS
-+	bool
-+	depends on GPIOMMC && CONFIGFS_FS
-+	default y
-+	help
-+	  This option automatically enables configfs support for gpiommc
-+	  if configfs is available.
-+
- config MMC_CB710
- 	tristate "ENE CB710 MMC/SD Interface support"
- 	depends on PCI
---- a/drivers/mmc/host/Makefile
-+++ b/drivers/mmc/host/Makefile
-@@ -33,6 +33,7 @@ obj-$(CONFIG_MMC_SDRICOH_CS)	+= sdricoh_
- obj-$(CONFIG_MMC_TMIO)		+= tmio_mmc.o
- obj-$(CONFIG_MMC_CB710)	+= cb710-mmc.o
- obj-$(CONFIG_MMC_VIA_SDMMC)	+= via-sdmmc.o
-+obj-$(CONFIG_GPIOMMC)		+= gpiommc.o
- obj-$(CONFIG_SDH_BFIN)		+= bfin_sdh.o
- 
- obj-$(CONFIG_MMC_SDHCI_OF)	+= sdhci-of.o
---- /dev/null
-+++ b/include/linux/mmc/gpiommc.h
-@@ -0,0 +1,71 @@
-+/*
-+ * Device driver for MMC/SD cards driven over a GPIO bus.
-+ *
-+ * Copyright (c) 2008 Michael Buesch
-+ *
-+ * Licensed under the GNU/GPL version 2.
-+ */
-+#ifndef LINUX_GPIOMMC_H_
-+#define LINUX_GPIOMMC_H_
-+
-+#include <linux/types.h>
-+
-+
-+#define GPIOMMC_MAX_NAMELEN		15
-+#define GPIOMMC_MAX_NAMELEN_STR		__stringify(GPIOMMC_MAX_NAMELEN)
-+
-+/**
-+ * struct gpiommc_pins - Hardware pin assignments
-+ *
-+ * @gpio_di: The GPIO number of the DATA IN pin
-+ * @gpio_do: The GPIO number of the DATA OUT pin
-+ * @gpio_clk: The GPIO number of the CLOCK pin
-+ * @gpio_cs: The GPIO number of the CHIPSELECT pin
-+ * @cs_activelow: If true, the chip is considered selected if @gpio_cs is low.
-+ */
-+struct gpiommc_pins {
-+	unsigned int gpio_di;
-+	unsigned int gpio_do;
-+	unsigned int gpio_clk;
-+	unsigned int gpio_cs;
-+	bool cs_activelow;
-+};
-+
-+/**
-+ * struct gpiommc_platform_data - Platform data for a MMC-over-SPI-GPIO device.
-+ *
-+ * @name: The unique name string of the device.
-+ * @pins: The hardware pin assignments.
-+ * @mode: The hardware mode. This is either SPI_MODE_0,
-+ *        SPI_MODE_1, SPI_MODE_2 or SPI_MODE_3. See the SPI documentation.
-+ * @no_spi_delay: Do not use delays in the lowlevel SPI bitbanging code.
-+ *                This is not standards compliant, but may be required for some
-+ *                embedded machines to gain reasonable speed.
-+ * @max_bus_speed: The maximum speed of the SPI bus, in Hertz.
-+ */
-+struct gpiommc_platform_data {
-+	char name[GPIOMMC_MAX_NAMELEN + 1];
-+	struct gpiommc_pins pins;
-+	u8 mode;
-+	bool no_spi_delay;
-+	unsigned int max_bus_speed;
-+};
-+
-+/**
-+ * GPIOMMC_PLATDEV_NAME - The platform device name string.
-+ *
-+ * The name string that has to be used for platform_device_alloc
-+ * when allocating a gpiommc device.
-+ */
-+#define GPIOMMC_PLATDEV_NAME	"gpiommc"
-+
-+/**
-+ * gpiommc_next_id - Get another platform device ID number.
-+ *
-+ * This returns the next platform device ID number that has to be used
-+ * for platform_device_alloc. The ID is opaque and should not be used for
-+ * anything else.
-+ */
-+int gpiommc_next_id(void);
-+
-+#endif /* LINUX_GPIOMMC_H_ */
---- /dev/null
-+++ b/Documentation/gpiommc.txt
-@@ -0,0 +1,97 @@
-+GPIOMMC - Driver for an MMC/SD card on a bitbanging GPIO SPI bus
-+================================================================
-+
-+The gpiommc module hooks up the mmc_spi and spi_gpio modules for running an
-+MMC or SD card on GPIO pins.
-+
-+Two interfaces for registering a new MMC/SD card device are provided:
-+A static platform-device based mechanism and a dynamic configfs based interface.
-+
-+
-+Registering devices via platform-device
-+=======================================
-+
-+The platform-device interface is used for registering MMC/SD devices that are
-+part of the hardware platform. This is most useful only for embedded machines
-+with MMC/SD devices statically connected to the platform GPIO bus.
-+
-+The data structures are declared in <linux/mmc/gpiommc.h>.
-+
-+To register a new device, define an instance of struct gpiommc_platform_data.
-+This structure holds any information about how the device is hooked up to the
-+GPIO pins and what hardware modes the device supports. See the docbook-style
-+documentation in the header file for more information on the struct fields.
-+
-+Then allocate a new instance of a platform device by doing:
-+
-+	pdev = platform_device_alloc(GPIOMMC_PLATDEV_NAME, gpiommc_next_id());
-+
-+This will allocate the platform device data structures and hook it up to the
-+gpiommc driver.
-+Then add the gpiommc_platform_data to the platform device.
-+
-+	err = platform_device_add_data(pdev, pdata, sizeof(struct gpiommc_platform_data));
-+
-+You may free the local instance of struct gpiommc_platform_data now. (So the
-+struct may be allocated on the stack, too).
-+Now simply register the platform device.
-+
-+	err = platform_device_add(pdev);
-+
-+Done. The gpiommc probe routine will be invoked now and you should see a kernel
-+log message for the added device.
-+
-+
-+Registering devices via configfs
-+================================
-+
-+MMC/SD cards connected via GPIO often are a pretty dynamic thing, as for example
-+selfmade hacks for soldering an MMC/SD card to standard GPIO pins on embedded
-+hardware are a common situation.
-+So we provide a dynamic interface to conveniently handle adding and removing
-+devices from userspace, without the need to recompile the kernel.
-+
-+The "gpiommc" subdirectory at the configfs mountpoint is used for handling
-+the dynamic configuration.
-+
-+To create a new device, it must first be allocated with mkdir.
-+The following command will allocate a device named "my_mmc":
-+	mkdir /config/gpiommc/my_mmc
-+
-+There are several configuration files available in the new
-+/config/gpiommc/my_mmc/ directory:
-+
-+gpio_data_in			= The SPI data-IN GPIO pin number.
-+gpio_data_out			= The SPI data-OUT GPIO pin number.
-+gpio_clock			= The SPI Clock GPIO pin number.
-+gpio_chipselect			= The SPI Chipselect GPIO pin number.
-+gpio_chipselect_activelow	= Boolean. If 0, Chipselect is active-HIGH.
-+				  If 1, Chipselect is active-LOW.
-+spi_mode			= The SPI data mode. Can be 0-3.
-+spi_delay			= Enable all delays in the lowlevel bitbanging.
-+max_bus_speed			= The maximum SPI bus speed. In Hertz.
-+
-+register			= Not a configuration parameter.
-+				  Used to register the configured card
-+				  with the kernel.
-+
-+The device must first get configured and then registered by writing "1" to
-+the "register" file.
-+The configuration parameters "gpio_data_in", "gpio_data_out", "gpio_clock"
-+and "gpio_chipselect" are essential and _must_ be configured before writing
-+"1" to the "register" file. The registration will fail, otherwise.
-+
-+The default values for the other parameters are:
-+gpio_chipselect_activelow	= 1		(CS active-LOW)
-+spi_mode			= 0		(SPI_MODE_0)
-+spi_delay			= 1		(enabled)
-+max_bus_speed			= 5000000	(5 Mhz)
-+
-+Configuration values can not be changed after registration. To unregister
-+the device, write a "0" to the "register" file. The configuration can be
-+changed again after unregistering.
-+
-+To completely remove the device, simply rmdir the directory
-+(/config/gpiommc/my_mmc in this example).
-+There's no need to first unregister the device before removing it. That will
-+be done automatically.
---- a/MAINTAINERS
-+++ b/MAINTAINERS
-@@ -2540,6 +2540,11 @@ T:	git git://git.kernel.org/pub/scm/linu
- S:	Maintained
- F:	drivers/media/video/gspca/
- 
-+GPIOMMC DRIVER
-+P:	Michael Buesch
-+M:	mb@bu3sch.de
-+S:	Maintained
-+
- HARDWARE MONITORING
- L:	lm-sensors@lm-sensors.org
- W:	http://www.lm-sensors.org/