11 files changed, 424 insertions, 190 deletions

diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index 08b4c5209384..b34b5cda5ae1 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -236,7 +236,7 @@ config CMA_SIZE_PERCENTAGE
 
 choice
 	prompt "Selected region size"
-	default CMA_SIZE_SEL_ABSOLUTE
+	default CMA_SIZE_SEL_MBYTES
 
 config CMA_SIZE_SEL_MBYTES
 	bool "Use mega bytes value only"
diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c
index 560a7173f810..bc256b641027 100644
--- a/drivers/base/dma-coherent.c
+++ b/drivers/base/dma-coherent.c
@@ -191,9 +191,8 @@ EXPORT_SYMBOL(dma_release_from_coherent);
  * This checks whether the memory was allocated from the per-device
  * coherent memory pool and if so, maps that memory to the provided vma.
  *
- * Returns 1 if we correctly mapped the memory, or 0 if
- * dma_release_coherent() should proceed with mapping memory from
- * generic pools.
+ * Returns 1 if we correctly mapped the memory, or 0 if the caller should
+ * proceed with mapping memory from generic pools.
  */
 int dma_mmap_from_coherent(struct device *dev, struct vm_area_struct *vma,
 			   void *vaddr, size_t size, int *ret)
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
index 9a1469474f55..612afcc5a938 100644
--- a/drivers/base/dma-contiguous.c
+++ b/drivers/base/dma-contiguous.c
@@ -27,15 +27,12 @@
 #include <linux/mm.h>
 #include <linux/mutex.h>
 #include <linux/page-isolation.h>
+#include <linux/sizes.h>
 #include <linux/slab.h>
 #include <linux/swap.h>
 #include <linux/mm_types.h>
 #include <linux/dma-contiguous.h>
 
-#ifndef SZ_1M
-#define SZ_1M (1 << 20)
-#endif
-
 struct cma {
 	unsigned long	base_pfn;
 	unsigned long	count;
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 81541452887b..8945f4e489ed 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -36,68 +36,6 @@ MODULE_AUTHOR("Manuel Estrada Sainz");
 MODULE_DESCRIPTION("Multi purpose firmware loading support");
 MODULE_LICENSE("GPL");
 
-static const char *fw_path[] = {
-	"/lib/firmware/updates/" UTS_RELEASE,
-	"/lib/firmware/updates",
-	"/lib/firmware/" UTS_RELEASE,
-	"/lib/firmware"
-};
-
-/* Don't inline this: 'struct kstat' is biggish */
-static noinline long fw_file_size(struct file *file)
-{
-	struct kstat st;
-	if (vfs_getattr(file->f_path.mnt, file->f_path.dentry, &st))
-		return -1;
-	if (!S_ISREG(st.mode))
-		return -1;
-	if (st.size != (long)st.size)
-		return -1;
-	return st.size;
-}
-
-static bool fw_read_file_contents(struct file *file, struct firmware *fw)
-{
-	long size;
-	char *buf;
-
-	size = fw_file_size(file);
-	if (size < 0)
-		return false;
-	buf = vmalloc(size);
-	if (!buf)
-		return false;
-	if (kernel_read(file, 0, buf, size) != size) {
-		vfree(buf);
-		return false;
-	}
-	fw->data = buf;
-	fw->size = size;
-	return true;
-}
-
-static bool fw_get_filesystem_firmware(struct firmware *fw, const char *name)
-{
-	int i;
-	bool success = false;
-	char *path = __getname();
-
-	for (i = 0; i < ARRAY_SIZE(fw_path); i++) {
-		struct file *file;
-		snprintf(path, PATH_MAX, "%s/%s", fw_path[i], name);
-
-		file = filp_open(path, O_RDONLY, 0);
-		if (IS_ERR(file))
-			continue;
-		success = fw_read_file_contents(file, fw);
-		fput(file);
-		if (success)
-			break;
-	}
-	__putname(path);
-	return success;
-}
-
 /* Builtin firmware support */
 
 #ifdef CONFIG_FW_LOADER
@@ -150,6 +88,11 @@ enum {
 	FW_STATUS_ABORT,
 };
 
+enum fw_buf_fmt {
+	VMALLOC_BUF,	/* used in direct loading */
+	PAGE_BUF,	/* used in loading via userspace */
+};
+
 static int loading_timeout = 60;	/* In seconds */
 
 static inline long firmware_loading_timeout(void)
@@ -173,8 +116,6 @@ struct firmware_cache {
 	spinlock_t name_lock;
 	struct list_head fw_names;
 
-	wait_queue_head_t wait_queue;
-	int cnt;
 	struct delayed_work work;
 
 	struct notifier_block   pm_notify;
@@ -187,6 +128,7 @@ struct firmware_buf {
 	struct completion completion;
 	struct firmware_cache *fwc;
 	unsigned long status;
+	enum fw_buf_fmt fmt;
 	void *data;
 	size_t size;
 	struct page **pages;
@@ -240,6 +182,7 @@ static struct firmware_buf *__allocate_fw_buf(const char *fw_name,
 	strcpy(buf->fw_id, fw_name);
 	buf->fwc = fwc;
 	init_completion(&buf->completion);
+	buf->fmt = VMALLOC_BUF;
 
 	pr_debug("%s: fw-%s buf=%p\n", __func__, fw_name, buf);
 
@@ -307,10 +250,14 @@ static void __fw_free_buf(struct kref *ref)
 	list_del(&buf->list);
 	spin_unlock(&fwc->lock);
 
-	vunmap(buf->data);
-	for (i = 0; i < buf->nr_pages; i++)
-		__free_page(buf->pages[i]);
-	kfree(buf->pages);
+
+	if (buf->fmt == PAGE_BUF) {
+		vunmap(buf->data);
+		for (i = 0; i < buf->nr_pages; i++)
+			__free_page(buf->pages[i]);
+		kfree(buf->pages);
+	} else
+		vfree(buf->data);
 	kfree(buf);
 }
 
@@ -319,6 +266,69 @@ static void fw_free_buf(struct firmware_buf *buf)
 	kref_put(&buf->ref, __fw_free_buf);
 }
 
+/* direct firmware loading support */
+static const char *fw_path[] = {
+	"/lib/firmware/updates/" UTS_RELEASE,
+	"/lib/firmware/updates",
+	"/lib/firmware/" UTS_RELEASE,
+	"/lib/firmware"
+};
+
+/* Don't inline this: 'struct kstat' is biggish */
+static noinline long fw_file_size(struct file *file)
+{
+	struct kstat st;
+	if (vfs_getattr(file->f_path.mnt, file->f_path.dentry, &st))
+		return -1;
+	if (!S_ISREG(st.mode))
+		return -1;
+	if (st.size != (long)st.size)
+		return -1;
+	return st.size;
+}
+
+static bool fw_read_file_contents(struct file *file, struct firmware_buf *fw_buf)
+{
+	long size;
+	char *buf;
+
+	size = fw_file_size(file);
+	if (size < 0)
+		return false;
+	buf = vmalloc(size);
+	if (!buf)
+		return false;
+	if (kernel_read(file, 0, buf, size) != size) {
+		vfree(buf);
+		return false;
+	}
+	fw_buf->data = buf;
+	fw_buf->size = size;
+	return true;
+}
+
+static bool fw_get_filesystem_firmware(struct firmware_buf *buf)
+{
+	int i;
+	bool success = false;
+	char *path = __getname();
+
+	for (i = 0; i < ARRAY_SIZE(fw_path); i++) {
+		struct file *file;
+		snprintf(path, PATH_MAX, "%s/%s", fw_path[i], buf->fw_id);
+
+		file = filp_open(path, O_RDONLY, 0);
+		if (IS_ERR(file))
+			continue;
+		success = fw_read_file_contents(file, buf);
+		fput(file);
+		if (success)
+			break;
+	}
+	__putname(path);
+	return success;
+}
+
 static struct firmware_priv *to_firmware_priv(struct device *dev)
 {
 	return container_of(dev, struct firmware_priv, dev);
@@ -423,6 +433,21 @@ static void firmware_free_data(const struct firmware *fw)
 #ifndef PAGE_KERNEL_RO
 #define PAGE_KERNEL_RO PAGE_KERNEL
 #endif
+
+/* one pages buffer should be mapped/unmapped only once */
+static int fw_map_pages_buf(struct firmware_buf *buf)
+{
+	if (buf->fmt != PAGE_BUF)
+		return 0;
+
+	if (buf->data)
+		vunmap(buf->data);
+	buf->data = vmap(buf->pages, buf->nr_pages, 0, PAGE_KERNEL_RO);
+	if (!buf->data)
+		return -ENOMEM;
+	return 0;
+}
+
 /**
  * firmware_loading_store - set value in the 'loading' control file
  * @dev: device pointer
@@ -467,6 +492,14 @@ static ssize_t firmware_loading_store(struct device *dev,
 		if (test_bit(FW_STATUS_LOADING, &fw_buf->status)) {
 			set_bit(FW_STATUS_DONE, &fw_buf->status);
 			clear_bit(FW_STATUS_LOADING, &fw_buf->status);
+
+			/*
+			 * Several loading requests may be pending on
+			 * one same firmware buf, so let all requests
+			 * see the mapped 'buf->data' once the loading
+			 * is completed.
+			 * */
+			fw_map_pages_buf(fw_buf);
 			complete_all(&fw_buf->completion);
 			break;
 		}
@@ -670,15 +703,6 @@ exit:
 	return fw_priv;
 }
 
-/* one pages buffer is mapped/unmapped only once */
-static int fw_map_pages_buf(struct firmware_buf *buf)
-{
-	buf->data = vmap(buf->pages, buf->nr_pages, 0, PAGE_KERNEL_RO);
-	if (!buf->data)
-		return -ENOMEM;
-	return 0;
-}
-
 /* store the pages buffer info firmware from buf */
 static void fw_set_page_data(struct firmware_buf *buf, struct firmware *fw)
 {
@@ -778,11 +802,6 @@ _request_firmware_prepare(const struct firmware **firmware_p, const char *name,
 		return NULL;
 	}
 
-	if (fw_get_filesystem_firmware(firmware, name)) {
-		dev_dbg(device, "firmware: direct-loading firmware %s\n", name);
-		return NULL;
-	}
-
 	ret = fw_lookup_and_allocate_buf(name, &fw_cache, &buf);
 	if (!ret)
 		fw_priv = fw_create_instance(firmware, name, device,
@@ -832,6 +851,21 @@ static int _request_firmware_load(struct firmware_priv *fw_priv, bool uevent,
 	struct device *f_dev = &fw_priv->dev;
 	struct firmware_buf *buf = fw_priv->buf;
 	struct firmware_cache *fwc = &fw_cache;
+	int direct_load = 0;
+
+	/* try direct loading from fs first */
+	if (fw_get_filesystem_firmware(buf)) {
+		dev_dbg(f_dev->parent, "firmware: direct-loading"
+			" firmware %s\n", buf->fw_id);
+
+		set_bit(FW_STATUS_DONE, &buf->status);
+		complete_all(&buf->completion);
+		direct_load = 1;
+		goto handle_fw;
+	}
+
+	/* fall back on userspace loading */
+	buf->fmt = PAGE_BUF;
 
 	dev_set_uevent_suppress(f_dev, true);
 
@@ -870,6 +904,7 @@ static int _request_firmware_load(struct firmware_priv *fw_priv, bool uevent,
 
 	del_timer_sync(&fw_priv->timeout);
 
+handle_fw:
 	mutex_lock(&fw_lock);
 	if (!buf->size || test_bit(FW_STATUS_ABORT, &buf->status))
 		retval = -ENOENT;
@@ -884,9 +919,6 @@ static int _request_firmware_load(struct firmware_priv *fw_priv, bool uevent,
 	if (!retval && f_dev->parent)
 		fw_add_devm_name(f_dev->parent, buf->fw_id);
 
-	if (!retval)
-		retval = fw_map_pages_buf(buf);
-
 	/*
 	 * After caching firmware image is started, let it piggyback
 	 * on request firmware.
@@ -902,6 +934,9 @@ static int _request_firmware_load(struct firmware_priv *fw_priv, bool uevent,
 	fw_priv->buf = NULL;
 	mutex_unlock(&fw_lock);
 
+	if (direct_load)
+		goto err_put_dev;
+
 	device_remove_file(f_dev, &dev_attr_loading);
 err_del_bin_attr:
 	device_remove_bin_file(f_dev, &firmware_attr_data);
@@ -1129,6 +1164,8 @@ int uncache_firmware(const char *fw_name)
 }
 
 #ifdef CONFIG_PM_SLEEP
+static ASYNC_DOMAIN_EXCLUSIVE(fw_cache_domain);
+
 static struct fw_cache_entry *alloc_fw_cache_entry(const char *name)
 {
 	struct fw_cache_entry *fce;
@@ -1142,17 +1179,27 @@ exit:
 	return fce;
 }
 
-static int fw_cache_piggyback_on_request(const char *name)
+static int __fw_entry_found(const char *name)
 {
 	struct firmware_cache *fwc = &fw_cache;
 	struct fw_cache_entry *fce;
-	int ret = 0;
 
-	spin_lock(&fwc->name_lock);
 	list_for_each_entry(fce, &fwc->fw_names, list) {
 		if (!strcmp(fce->name, name))
-			goto found;
+			return 1;
 	}
+	return 0;
+}
+
+static int fw_cache_piggyback_on_request(const char *name)
+{
+	struct firmware_cache *fwc = &fw_cache;
+	struct fw_cache_entry *fce;
+	int ret = 0;
+
+	spin_lock(&fwc->name_lock);
+	if (__fw_entry_found(name))
+		goto found;
 
 	fce = alloc_fw_cache_entry(name);
 	if (fce) {
@@ -1185,12 +1232,6 @@ static void __async_dev_cache_fw_image(void *fw_entry,
 
 		free_fw_cache_entry(fce);
 	}
-
-	spin_lock(&fwc->name_lock);
-	fwc->cnt--;
-	spin_unlock(&fwc->name_lock);
-
-	wake_up(&fwc->wait_queue);
 }
 
 /* called with dev->devres_lock held */
@@ -1229,11 +1270,19 @@ static void dev_cache_fw_image(struct device *dev, void *data)
 		list_del(&fce->list);
 
 		spin_lock(&fwc->name_lock);
-		fwc->cnt++;
-		list_add(&fce->list, &fwc->fw_names);
+		/* only one cache entry for one firmware */
+		if (!__fw_entry_found(fce->name)) {
+			list_add(&fce->list, &fwc->fw_names);
+		} else {
+			free_fw_cache_entry(fce);
+			fce = NULL;
+		}
 		spin_unlock(&fwc->name_lock);
 
-		async_schedule(__async_dev_cache_fw_image, (void *)fce);
+		if (fce)
+			async_schedule_domain(__async_dev_cache_fw_image,
+					      (void *)fce,
+					      &fw_cache_domain);
 	}
 }
 
@@ -1275,6 +1324,9 @@ static void device_cache_fw_images(void)
 
 	pr_debug("%s\n", __func__);
 
+	/* cancel uncache work */
+	cancel_delayed_work_sync(&fwc->work);
+
 	/*
 	 * use small loading timeout for caching devices' firmware
 	 * because all these firmware images have been loaded
@@ -1292,21 +1344,7 @@ static void device_cache_fw_images(void)
 	mutex_unlock(&fw_lock);
 
 	/* wait for completion of caching firmware for all devices */
-	spin_lock(&fwc->name_lock);
-	for (;;) {
-		prepare_to_wait(&fwc->wait_queue, &wait,
-				TASK_UNINTERRUPTIBLE);
-		if (!fwc->cnt)
-			break;
-
-		spin_unlock(&fwc->name_lock);
-
-		schedule();
-
-		spin_lock(&fwc->name_lock);
-	}
-	spin_unlock(&fwc->name_lock);
-	finish_wait(&fwc->wait_queue, &wait);
+	async_synchronize_full_domain(&fw_cache_domain);
 
 	loading_timeout = old_timeout;
 }
@@ -1394,9 +1432,7 @@ static void __init fw_cache_init(void)
 #ifdef CONFIG_PM_SLEEP
 	spin_lock_init(&fw_cache.name_lock);
 	INIT_LIST_HEAD(&fw_cache.fw_names);
-	fw_cache.cnt = 0;
 
-	init_waitqueue_head(&fw_cache.wait_queue);
 	INIT_DELAYED_WORK(&fw_cache.work,
 			  device_uncache_fw_images_work);
 
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 8727e9c5eea4..72c776f2a1f5 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -83,9 +83,16 @@ EXPORT_SYMBOL_GPL(platform_get_resource);
  */
 int platform_get_irq(struct platform_device *dev, unsigned int num)
 {
+#ifdef CONFIG_SPARC
+	/* sparc does not have irqs represented as IORESOURCE_IRQ resources */
+	if (!dev || num >= dev->archdata.num_irqs)
+		return -ENXIO;
+	return dev->archdata.irqs[num];
+#else
 	struct resource *r = platform_get_resource(dev, IORESOURCE_IRQ, num);
 
 	return r ? r->start : -ENXIO;
+#endif
 }
 EXPORT_SYMBOL_GPL(platform_get_irq);
 
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index c22b869245d9..96b71b6536d6 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -1862,7 +1862,7 @@ int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state)
 	cpuidle_drv = cpuidle_driver_ref();
 	if (!cpuidle_drv) {
 		ret = -ENODEV;
-		goto out;
+		goto err_drv;
 	}
 	if (cpuidle_drv->state_count <= state) {
 		ret = -EINVAL;
@@ -1884,6 +1884,9 @@ int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state)
 
  err:
 	cpuidle_driver_unref();
+
+ err_drv:
+	kfree(cpu_data);
 	goto out;
 }
 
diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c
index 74a67e0019a2..fbbd4ed2edf2 100644
--- a/drivers/base/power/qos.c
+++ b/drivers/base/power/qos.c
@@ -451,7 +451,7 @@ int dev_pm_qos_add_ancestor_request(struct device *dev,
 	if (ancestor)
 		error = dev_pm_qos_add_request(ancestor, req, value);
 
-	if (error)
+	if (error < 0)
 		req->dev = NULL;
 
 	return error;
diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig
index 6be390bd8bd1..f0d30543fcce 100644
--- a/drivers/base/regmap/Kconfig
+++ b/drivers/base/regmap/Kconfig
@@ -3,7 +3,7 @@
 # subsystems should select the appropriate symbols.
 
 config REGMAP
-	default y if (REGMAP_I2C || REGMAP_SPI)
+	default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_MMIO || REGMAP_IRQ)
 	select LZO_COMPRESS
 	select LZO_DECOMPRESS
 	select IRQ_DOMAIN if REGMAP_IRQ
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index 80f9ab9c3aa4..9c3b0e7a6c7d 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -15,10 +15,18 @@
 
 #include <linux/regmap.h>
 #include <linux/fs.h>
+#include <linux/list.h>
 
 struct regmap;
 struct regcache_ops;
 
+struct regmap_debugfs_off_cache {
+	struct list_head list;
+	off_t min;
+	off_t max;
+	unsigned int base_reg;
+};
+
 struct regmap_format {
 	size_t buf_size;
 	size_t reg_bytes;
@@ -50,6 +58,12 @@ struct regmap {
 #ifdef CONFIG_DEBUG_FS
 	struct dentry *debugfs;
 	const char *debugfs_name;
+
+	unsigned int debugfs_reg_len;
+	unsigned int debugfs_val_len;
+	unsigned int debugfs_tot_len;
+
+	struct list_head debugfs_off_cache;
 #endif
 
 	unsigned int max_register;
@@ -120,6 +134,8 @@ int _regmap_write(struct regmap *map, unsigned int reg,
 
 struct regmap_range_node {
 	struct rb_node node;
+	const char *name;
+	struct regmap *map;
 
 	unsigned int range_min;
 	unsigned int range_max;
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index bb1ff175b962..07aad786f817 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -56,17 +56,74 @@ static const struct file_operations regmap_name_fops = {
 	.llseek = default_llseek,
 };
 
-static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf,
-				    size_t count, loff_t *ppos)
+/*
+ * Work out where the start offset maps into register numbers, bearing
+ * in mind that we suppress hidden registers.
+ */
+static unsigned int regmap_debugfs_get_dump_start(struct regmap *map,
+						  unsigned int base,
+						  loff_t from,
+						  loff_t *pos)
 {
-	int reg_len, val_len, tot_len;
-	size_t buf_pos = 0;
+	struct regmap_debugfs_off_cache *c = NULL;
 	loff_t p = 0;
+	unsigned int i, ret;
+
+	/*
+	 * If we don't have a cache build one so we don't have to do a
+	 * linear scan each time.
+	 */
+	if (list_empty(&map->debugfs_off_cache)) {
+		for (i = base; i <= map->max_register; i += map->reg_stride) {
+			/* Skip unprinted registers, closing off cache entry */
+			if (!regmap_readable(map, i) ||
+			    regmap_precious(map, i)) {
+				if (c) {
+					c->max = p - 1;
+					list_add_tail(&c->list,
+						      &map->debugfs_off_cache);
+					c = NULL;
+				}
+
+				continue;
+			}
+
+			/* No cache entry?  Start a new one */
+			if (!c) {
+				c = kzalloc(sizeof(*c), GFP_KERNEL);
+				if (!c)
+					break;
+				c->min = p;
+				c->base_reg = i;
+			}
+
+			p += map->debugfs_tot_len;
+		}
+	}
+
+	/* Find the relevant block */
+	list_for_each_entry(c, &map->debugfs_off_cache, list) {
+		if (*pos >= c->min && *pos <= c->max) {
+			*pos = c->min;
+			return c->base_reg;
+		}
+
+		ret = c->max;
+	}
+
+	return ret;
+}
+
+static ssize_t regmap_read_debugfs(struct regmap *map, unsigned int from,
+				   unsigned int to, char __user *user_buf,
+				   size_t count, loff_t *ppos)
+{
+	size_t buf_pos = 0;
+	loff_t p = *ppos;
 	ssize_t ret;
 	int i;
-	struct regmap *map = file->private_data;
 	char *buf;
-	unsigned int val;
+	unsigned int val, start_reg;
 
 	if (*ppos < 0 || !count)
 		return -EINVAL;
@@ -76,11 +133,18 @@ static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf,
 		return -ENOMEM;
 
 	/* Calculate the length of a fixed format  */
-	reg_len = regmap_calc_reg_len(map->max_register, buf, count);
-	val_len = 2 * map->format.val_bytes;
-	tot_len = reg_len + val_len + 3;      /* : \n */
+	if (!map->debugfs_tot_len) {
+		map->debugfs_reg_len = regmap_calc_reg_len(map->max_register,
+							   buf, count);
+		map->debugfs_val_len = 2 * map->format.val_bytes;
+		map->debugfs_tot_len = map->debugfs_reg_len +
+			map->debugfs_val_len + 3;      /* : \n */
+	}
 
-	for (i = 0; i <= map->max_register; i += map->reg_stride) {
+	/* Work out which register we're starting at */
+	start_reg = regmap_debugfs_get_dump_start(map, from, *ppos, &p);
+
+	for (i = start_reg; i <= to; i += map->reg_stride) {
 		if (!regmap_readable(map, i))
 			continue;
 
@@ -90,26 +154,27 @@ static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf,
 		/* If we're in the region the user is trying to read */
 		if (p >= *ppos) {
 			/* ...but not beyond it */
-			if (buf_pos >= count - 1 - tot_len)
+			if (buf_pos + 1 + map->debugfs_tot_len >= count)
 				break;
 
 			/* Format the register */
 			snprintf(buf + buf_pos, count - buf_pos, "%.*x: ",
-				 reg_len, i);
-			buf_pos += reg_len + 2;
+				 map->debugfs_reg_len, i - from);
+			buf_pos += map->debugfs_reg_len + 2;
 
 			/* Format the value, write all X if we can't read */
 			ret = regmap_read(map, i, &val);
 			if (ret == 0)
 				snprintf(buf + buf_pos, count - buf_pos,
-					 "%.*x", val_len, val);
+					 "%.*x", map->debugfs_val_len, val);
 			else
-				memset(buf + buf_pos, 'X', val_len);
+				memset(buf + buf_pos, 'X',
+				       map->debugfs_val_len);
 			buf_pos += 2 * map->format.val_bytes;
 
 			buf[buf_pos++] = '\n';
 		}
-		p += tot_len;
+		p += map->debugfs_tot_len;
 	}
 
 	ret = buf_pos;
@@ -126,6 +191,15 @@ out:
 	return ret;
 }
 
+static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf,
+				    size_t count, loff_t *ppos)
+{
+	struct regmap *map = file->private_data;
+
+	return regmap_read_debugfs(map, 0, map->max_register, user_buf,
+				   count, ppos);
+}
+
 #undef REGMAP_ALLOW_WRITE_DEBUGFS
 #ifdef REGMAP_ALLOW_WRITE_DEBUGFS
 /*
@@ -174,6 +248,22 @@ static const struct file_operations regmap_map_fops = {
 	.llseek = default_llseek,
 };
 
+static ssize_t regmap_range_read_file(struct file *file, char __user *user_buf,
+				      size_t count, loff_t *ppos)
+{
+	struct regmap_range_node *range = file->private_data;
+	struct regmap *map = range->map;
+
+	return regmap_read_debugfs(map, range->range_min, range->range_max,
+				   user_buf, count, ppos);
+}
+
+static const struct file_operations regmap_range_fops = {
+	.open = simple_open,
+	.read = regmap_range_read_file,
+	.llseek = default_llseek,
+};
+
 static ssize_t regmap_access_read_file(struct file *file,
 				       char __user *user_buf, size_t count,
 				       loff_t *ppos)
@@ -244,6 +334,11 @@ static const struct file_operations regmap_access_fops = {
 
 void regmap_debugfs_init(struct regmap *map, const char *name)
 {
+	struct rb_node *next;
+	struct regmap_range_node *range_node;
+
+	INIT_LIST_HEAD(&map->debugfs_off_cache);
+
 	if (name) {
 		map->debugfs_name = kasprintf(GFP_KERNEL, "%s-%s",
 					      dev_name(map->dev), name);
@@ -276,11 +371,32 @@ void regmap_debugfs_init(struct regmap *map, const char *name)
 		debugfs_create_bool("cache_bypass", 0400, map->debugfs,
 				    &map->cache_bypass);
 	}
+
+	next = rb_first(&map->range_tree);
+	while (next) {
+		range_node = rb_entry(next, struct regmap_range_node, node);
+
+		if (range_node->name)
+			debugfs_create_file(range_node->name, 0400,
+					    map->debugfs, range_node,
+					    &regmap_range_fops);
+
+		next = rb_next(&range_node->node);
+	}
 }
 
 void regmap_debugfs_exit(struct regmap *map)
 {
+	struct regmap_debugfs_off_cache *c;
+
 	debugfs_remove_recursive(map->debugfs);
+	while (!list_empty(&map->debugfs_off_cache)) {
+		c = list_first_entry(&map->debugfs_off_cache,
+				     struct regmap_debugfs_off_cache,
+				     list);
+		list_del(&c->list);
+		kfree(c);
+	}
 	kfree(map->debugfs_name);
 }
 
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 52069d29ff12..c7465f19f674 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -519,20 +519,38 @@ struct regmap *regmap_init(struct device *dev,
 	}
 
 	map->range_tree = RB_ROOT;
-	for (i = 0; i < config->n_ranges; i++) {
+	for (i = 0; i < config->num_ranges; i++) {
 		const struct regmap_range_cfg *range_cfg = &config->ranges[i];
 		struct regmap_range_node *new;
 
 		/* Sanity check */
-		if (range_cfg->range_max < range_cfg->range_min ||
-		    range_cfg->range_max > map->max_register ||
-		    range_cfg->selector_reg > map->max_register ||
-		    range_cfg->window_len == 0)
+		if (range_cfg->range_max < range_cfg->range_min) {
+			dev_err(map->dev, "Invalid range %d: %d < %d\n", i,
+				range_cfg->range_max, range_cfg->range_min);
 			goto err_range;
+		}
+
+		if (range_cfg->range_max > map->max_register) {
+			dev_err(map->dev, "Invalid range %d: %d > %d\n", i,
+				range_cfg->range_max, map->max_register);
+			goto err_range;
+		}
+
+		if (range_cfg->selector_reg > map->max_register) {
+			dev_err(map->dev,
+				"Invalid range %d: selector out of map\n", i);
+			goto err_range;
+		}
+
+		if (range_cfg->window_len == 0) {
+			dev_err(map->dev, "Invalid range %d: window_len 0\n",
+				i);
+			goto err_range;
+		}
 
 		/* Make sure, that this register range has no selector
 		   or data window within its boundary */
-		for (j = 0; j < config->n_ranges; j++) {
+		for (j = 0; j < config->num_ranges; j++) {
 			unsigned sel_reg = config->ranges[j].selector_reg;
 			unsigned win_min = config->ranges[j].window_start;
 			unsigned win_max = win_min +
@@ -540,11 +558,17 @@ struct regmap *regmap_init(struct device *dev,
 
 			if (range_cfg->range_min <= sel_reg &&
 			    sel_reg <= range_cfg->range_max) {
+				dev_err(map->dev,
+					"Range %d: selector for %d in window\n",
+					i, j);
 				goto err_range;
 			}
 
 			if (!(win_max < range_cfg->range_min ||
 			      win_min > range_cfg->range_max)) {
+				dev_err(map->dev,
+					"Range %d: window for %d in window\n",
+					i, j);
 				goto err_range;
 			}
 		}
@@ -555,6 +579,8 @@ struct regmap *regmap_init(struct device *dev,
 			goto err_range;
 		}
 
+		new->map = map;
+		new->name = range_cfg->name;
 		new->range_min = range_cfg->range_min;
 		new->range_max = range_cfg->range_max;
 		new->selector_reg = range_cfg->selector_reg;
@@ -564,6 +590,7 @@ struct regmap *regmap_init(struct device *dev,
 		new->window_len = range_cfg->window_len;
 
 		if (_regmap_range_add(map, new) == false) {
+			dev_err(map->dev, "Failed to add range %d\n", i);
 			kfree(new);
 			goto err_range;
 		}
@@ -579,7 +606,7 @@ struct regmap *regmap_init(struct device *dev,
 	}
 
 	ret = regcache_init(map, config);
-	if (ret < 0)
+	if (ret != 0)
 		goto err_range;
 
 	regmap_debugfs_init(map, config->name);
@@ -738,59 +765,57 @@ struct regmap *dev_get_regmap(struct device *dev, const char *name)
 EXPORT_SYMBOL_GPL(dev_get_regmap);
 
 static int _regmap_select_page(struct regmap *map, unsigned int *reg,
+			       struct regmap_range_node *range,
 			       unsigned int val_num)
 {
-	struct regmap_range_node *range;
 	void *orig_work_buf;
 	unsigned int win_offset;
 	unsigned int win_page;
 	bool page_chg;
 	int ret;
 
-	range = _regmap_range_lookup(map, *reg);
-	if (range) {
-		win_offset = (*reg - range->range_min) % range->window_len;
-		win_page = (*reg - range->range_min) / range->window_len;
-
-		if (val_num > 1) {
-			/* Bulk write shouldn't cross range boundary */
-			if (*reg + val_num - 1 > range->range_max)
-				return -EINVAL;
+	win_offset = (*reg - range->range_min) % range->window_len;
+	win_page = (*reg - range->range_min) / range->window_len;
 
-			/* ... or single page boundary */
-			if (val_num > range->window_len - win_offset)
-				return -EINVAL;
-		}
+	if (val_num > 1) {
+		/* Bulk write shouldn't cross range boundary */
+		if (*reg + val_num - 1 > range->range_max)
+			return -EINVAL;
 
-		/* It is possible to have selector register inside data window.
-		   In that case, selector register is located on every page and
-		   it needs no page switching, when accessed alone. */
-		if (val_num > 1 ||
-		    range->window_start + win_offset != range->selector_reg) {
-			/* Use separate work_buf during page switching */
-			orig_work_buf = map->work_buf;
-			map->work_buf = map->selector_work_buf;
+		/* ... or single page boundary */
+		if (val_num > range->window_len - win_offset)
+			return -EINVAL;
+	}
 
-			ret = _regmap_update_bits(map, range->selector_reg,
-					range->selector_mask,
-					win_page << range->selector_shift,
-					&page_chg);
+	/* It is possible to have selector register inside data window.
+	   In that case, selector register is located on every page and
+	   it needs no page switching, when accessed alone. */
+	if (val_num > 1 ||
+	    range->window_start + win_offset != range->selector_reg) {
+		/* Use separate work_buf during page switching */
+		orig_work_buf = map->work_buf;
+		map->work_buf = map->selector_work_buf;
 
-			map->work_buf = orig_work_buf;
+		ret = _regmap_update_bits(map, range->selector_reg,
+					  range->selector_mask,
+					  win_page << range->selector_shift,
+					  &page_chg);
 
-			if (ret < 0)
-				return ret;
-		}
+		map->work_buf = orig_work_buf;
 
-		*reg = range->window_start + win_offset;
+		if (ret != 0)
+			return ret;
 	}
 
+	*reg = range->window_start + win_offset;
+
 	return 0;
 }
 
 static int _regmap_raw_write(struct regmap *map, unsigned int reg,
 			     const void *val, size_t val_len)
 {
+	struct regmap_range_node *range;
 	u8 *u8 = map->work_buf;
 	void *buf;
 	int ret = -ENOTSUPP;
@@ -814,7 +839,7 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg,
 					     ival);
 			if (ret) {
 				dev_err(map->dev,
-				   "Error in caching of register: %u ret: %d\n",
+					"Error in caching of register: %x ret: %d\n",
 					reg + i, ret);
 				return ret;
 			}
@@ -825,9 +850,35 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg,
 		}
 	}
 
-	ret = _regmap_select_page(map, &reg, val_len / map->format.val_bytes);
-	if (ret < 0)
-		return ret;
+	range = _regmap_range_lookup(map, reg);
+	if (range) {
+		int val_num = val_len / map->format.val_bytes;
+		int win_offset = (reg - range->range_min) % range->window_len;
+		int win_residue = range->window_len - win_offset;
+
+		/* If the write goes beyond the end of the window split it */
+		while (val_num > win_residue) {
+			dev_dbg(map->dev, "Writing window %d/%zu\n",
+				win_residue, val_len / map->format.val_bytes);
+			ret = _regmap_raw_write(map, reg, val, win_residue *
+						map->format.val_bytes);
+			if (ret != 0)
+				return ret;
+
+			reg += win_residue;
+			val_num -= win_residue;
+			val += win_residue * map->format.val_bytes;
+			val_len -= win_residue * map->format.val_bytes;
+
+			win_offset = (reg - range->range_min) %
+				range->window_len;
+			win_residue = range->window_len - win_offset;
+		}
+
+		ret = _regmap_select_page(map, &reg, range, val_num);
+		if (ret != 0)
+			return ret;
+	}
 
 	map->format.format_reg(map->work_buf, reg, map->reg_shift);
 
@@ -876,6 +927,7 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg,
 int _regmap_write(struct regmap *map, unsigned int reg,
 		  unsigned int val)
 {
+	struct regmap_range_node *range;
 	int ret;
 	BUG_ON(!map->format.format_write && !map->format.format_val);
 
@@ -897,9 +949,12 @@ int _regmap_write(struct regmap *map, unsigned int reg,
 	trace_regmap_reg_write(map->dev, reg, val);
 
 	if (map->format.format_write) {
-		ret = _regmap_select_page(map, &reg, 1);
-		if (ret < 0)
-			return ret;
+		range = _regmap_range_lookup(map, reg);
+		if (range) {
+			ret = _regmap_select_page(map, &reg, range, 1);
+			if (ret != 0)
+				return ret;
+		}
 
 		map->format.format_write(map, reg, val);
 
@@ -1055,12 +1110,17 @@ EXPORT_SYMBOL_GPL(regmap_bulk_write);
 static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
 			    unsigned int val_len)
 {
+	struct regmap_range_node *range;
 	u8 *u8 = map->work_buf;
 	int ret;
 
-	ret = _regmap_select_page(map, &reg, val_len / map->format.val_bytes);
-	if (ret < 0)
-		return ret;
+	range = _regmap_range_lookup(map, reg);
+	if (range) {
+		ret = _regmap_select_page(map, &reg, range,
+					  val_len / map->format.val_bytes);
+		if (ret != 0)
+			return ret;
+	}
 
 	map->format.format_reg(map->work_buf, reg, map->reg_shift);