Merge tag 'regmap-v3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap

Pull regmap updates from Mark Brown:
 "The main thing this time around has been some improvments to async
  I/O.

   - Cleaned up the async I/O support and extended it to allow single
     register writes more easily.  This is now used where possible for
     internally generated I/O, providing performance improvements for
     devices that can do async I/O.
   - An API for issuing a sequence of register writes as a single
     operation.  Some devices and buses can take advantage of this to do
     the I/O faster.
   - Addition of regmap_field APIs which help drivers for devices with
     repeated IPs or which move registers around between revisions to
     share helpers.
   - Support for SPMI buses"

* tag 'regmap-v3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: add SPMI support
  regmap: debugfs: Fix a boot time crash with early regmap init
  regmap: irq: clear status when disable irq
  regmap: Only send a single buffer for async I/O if writing one register
  regmap: spi: Handle async writes of only one buffer
  regmap: new API regmap_multi_reg_write() definition
  regmap: Use async I/O during cache sync
  regmap: Use async I/O for patch application
  regmap: Fix regmap_bulk_write single-rw mutex deadlock
  regmap: Provide asynchronous write and update bits operations
  regmap: Simplify the initiation of async I/O
  regmap: Don't generate gather writes for single register raw writes
  regmap: Cache async work structures
  regmap: add helper macro to set min/max range of register
  regmap: Add regmap_fields APIs
  regmap: add regmap_field_update_bits()

9 files changed, 507 insertions, 58 deletions

diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig
index f0d30543fcce..4251570610c9 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 || REGMAP_MMIO || REGMAP_IRQ)
+        default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_MMIO || REGMAP_IRQ)
         select LZO_COMPRESS
         select LZO_DECOMPRESS
         select IRQ_DOMAIN if REGMAP_IRQ
@@ -15,6 +15,9 @@ config REGMAP_I2C
 config REGMAP_SPI
         tristate
 
+config REGMAP_SPMI
+        tristate
+
 config REGMAP_MMIO
         tristate
 
diff --git a/drivers/base/regmap/Makefile b/drivers/base/regmap/Makefile
index cf129980abd0..a7c670b4123a 100644
--- a/drivers/base/regmap/Makefile
+++ b/drivers/base/regmap/Makefile
@@ -3,5 +3,6 @@ obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-lzo.o regcache-flat.o
 obj-$(CONFIG_DEBUG_FS) += regmap-debugfs.o
 obj-$(CONFIG_REGMAP_I2C) += regmap-i2c.o
 obj-$(CONFIG_REGMAP_SPI) += regmap-spi.o
+obj-$(CONFIG_REGMAP_SPMI) += regmap-spmi.o
 obj-$(CONFIG_REGMAP_MMIO) += regmap-mmio.o
 obj-$(CONFIG_REGMAP_IRQ) += regmap-irq.o
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index 57f777835d97..33414b1de201 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -44,7 +44,6 @@ struct regmap_format {
 
 struct regmap_async {
         struct list_head list;
-        struct work_struct cleanup;
         struct regmap *map;
         void *work_buf;
 };
@@ -64,9 +63,11 @@ struct regmap {
         void *bus_context;
         const char *name;
 
+        bool async;
         spinlock_t async_lock;
         wait_queue_head_t async_waitq;
         struct list_head async_list;
+        struct list_head async_free;
         int async_ret;
 
 #ifdef CONFIG_DEBUG_FS
@@ -179,6 +180,9 @@ struct regmap_field {
         /* lsb */
         unsigned int shift;
         unsigned int reg;
+
+        unsigned int id_size;
+        unsigned int id_offset;
 };
 
 #ifdef CONFIG_DEBUG_FS
@@ -218,7 +222,7 @@ bool regcache_set_val(struct regmap *map, void *base, unsigned int idx,
 int regcache_lookup_reg(struct regmap *map, unsigned int reg);
 
 int _regmap_raw_write(struct regmap *map, unsigned int reg,
-                      const void *val, size_t val_len, bool async);
+                      const void *val, size_t val_len);
 
 void regmap_async_complete_cb(struct regmap_async *async, int ret);
 
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index d6c2d691b6e8..d4dd77134814 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -307,6 +307,8 @@ int regcache_sync(struct regmap *map)
         if (!map->cache_dirty)
                 goto out;
 
+        map->async = true;
+
         /* Apply any patch first */
         map->cache_bypass = 1;
         for (i = 0; i < map->patch_regs; i++) {
@@ -332,11 +334,15 @@ int regcache_sync(struct regmap *map)
                 map->cache_dirty = false;
 
 out:
-        trace_regcache_sync(map->dev, name, "stop");
         /* Restore the bypass state */
+        map->async = false;
         map->cache_bypass = bypass;
         map->unlock(map->lock_arg);
 
+        regmap_async_complete(map);
+
+        trace_regcache_sync(map->dev, name, "stop");
+
         return ret;
 }
 EXPORT_SYMBOL_GPL(regcache_sync);
@@ -375,17 +381,23 @@ int regcache_sync_region(struct regmap *map, unsigned int min,
         if (!map->cache_dirty)
                 goto out;
 
+        map->async = true;
+
         if (map->cache_ops->sync)
                 ret = map->cache_ops->sync(map, min, max);
         else
                 ret = regcache_default_sync(map, min, max);
 
 out:
-        trace_regcache_sync(map->dev, name, "stop region");
         /* Restore the bypass state */
         map->cache_bypass = bypass;
+        map->async = false;
         map->unlock(map->lock_arg);
 
+        regmap_async_complete(map);
+
+        trace_regcache_sync(map->dev, name, "stop region");
+
         return ret;
 }
 EXPORT_SYMBOL_GPL(regcache_sync_region);
@@ -631,8 +643,7 @@ static int regcache_sync_block_raw_flush(struct regmap *map, const void **data,
 
         map->cache_bypass = 1;
 
-        ret = _regmap_raw_write(map, base, *data, count * val_bytes,
-                                false);
+        ret = _regmap_raw_write(map, base, *data, count * val_bytes);
 
         map->cache_bypass = 0;
 
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index de11ecaf3833..c5471cd6ebb7 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -15,10 +15,19 @@
 #include <linux/debugfs.h>
 #include <linux/uaccess.h>
 #include <linux/device.h>
+#include <linux/list.h>
 
 #include "internal.h"
 
+struct regmap_debugfs_node {
+        struct regmap *map;
+        const char *name;
+        struct list_head link;
+};
+
 static struct dentry *regmap_debugfs_root;
+static LIST_HEAD(regmap_debugfs_early_list);
+static DEFINE_MUTEX(regmap_debugfs_early_lock);
 
 /* Calculate the length of a fixed format  */
 static size_t regmap_calc_reg_len(int max_val, char *buf, size_t buf_size)
@@ -465,6 +474,20 @@ void regmap_debugfs_init(struct regmap *map, const char *name)
         struct rb_node *next;
         struct regmap_range_node *range_node;
 
+        /* If we don't have the debugfs root yet, postpone init */
+        if (!regmap_debugfs_root) {
+                struct regmap_debugfs_node *node;
+                node = kzalloc(sizeof(*node), GFP_KERNEL);
+                if (!node)
+                        return;
+                node->map = map;
+                node->name = name;
+                mutex_lock(&regmap_debugfs_early_lock);
+                list_add(&node->link, &regmap_debugfs_early_list);
+                mutex_unlock(&regmap_debugfs_early_lock);
+                return;
+        }
+
         INIT_LIST_HEAD(&map->debugfs_off_cache);
         mutex_init(&map->cache_lock);
 
@@ -519,18 +542,42 @@ void regmap_debugfs_init(struct regmap *map, const char *name)
 
 void regmap_debugfs_exit(struct regmap *map)
 {
-        debugfs_remove_recursive(map->debugfs);
-        mutex_lock(&map->cache_lock);
-        regmap_debugfs_free_dump_cache(map);
-        mutex_unlock(&map->cache_lock);
-        kfree(map->debugfs_name);
+        if (map->debugfs) {
+                debugfs_remove_recursive(map->debugfs);
+                mutex_lock(&map->cache_lock);
+                regmap_debugfs_free_dump_cache(map);
+                mutex_unlock(&map->cache_lock);
+                kfree(map->debugfs_name);
+        } else {
+                struct regmap_debugfs_node *node, *tmp;
+
+                mutex_lock(&regmap_debugfs_early_lock);
+                list_for_each_entry_safe(node, tmp, &regmap_debugfs_early_list,
+                                         link) {
+                        if (node->map == map) {
+                                list_del(&node->link);
+                                kfree(node);
+                        }
+                }
+                mutex_unlock(&regmap_debugfs_early_lock);
+        }
 }
 
 void regmap_debugfs_initcall(void)
 {
+        struct regmap_debugfs_node *node, *tmp;
+
         regmap_debugfs_root = debugfs_create_dir("regmap", NULL);
         if (!regmap_debugfs_root) {
                 pr_warn("regmap: Failed to create debugfs root\n");
                 return;
         }
+
+        mutex_lock(&regmap_debugfs_early_lock);
+        list_for_each_entry_safe(node, tmp, &regmap_debugfs_early_list, link) {
+                regmap_debugfs_init(node->map, node->name);
+                list_del(&node->link);
+                kfree(node);
+        }
+        mutex_unlock(&regmap_debugfs_early_lock);
 }
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index d10456ffd811..763c60d3d277 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -105,6 +105,22 @@ static void regmap_irq_sync_unlock(struct irq_data *data)
                                         "Failed to sync wakes in %x: %d\n",
                                         reg, ret);
                 }
+
+                if (!d->chip->init_ack_masked)
+                        continue;
+                /*
+                 * Ack all the masked interrupts uncondictionly,
+                 * OR if there is masked interrupt which hasn't been Acked,
+                 * it'll be ignored in irq handler, then may introduce irq storm
+                 */
+                if (d->mask_buf[i] && d->chip->ack_base) {
+                        reg = d->chip->ack_base +
+                                (i * map->reg_stride * d->irq_reg_stride);
+                        ret = regmap_write(map, reg, d->mask_buf[i]);
+                        if (ret != 0)
+                                dev_err(d->map->dev, "Failed to ack 0x%x: %d\n",
+                                        reg, ret);
+                }
         }
 
         if (d->chip->runtime_pm)
diff --git a/drivers/base/regmap/regmap-spi.c b/drivers/base/regmap/regmap-spi.c
index 4c506bd940f3..37f12ae7aada 100644
--- a/drivers/base/regmap/regmap-spi.c
+++ b/drivers/base/regmap/regmap-spi.c
@@ -73,7 +73,8 @@ static int regmap_spi_async_write(void *context,
 
         spi_message_init(&async->m);
         spi_message_add_tail(&async->t[0], &async->m);
-        spi_message_add_tail(&async->t[1], &async->m);
+        if (val)
+                spi_message_add_tail(&async->t[1], &async->m);
 
         async->m.complete = regmap_spi_complete;
         async->m.context = async;
diff --git a/drivers/base/regmap/regmap-spmi.c b/drivers/base/regmap/regmap-spmi.c
new file mode 100644
index 000000000000..ac2391013db1
--- /dev/null
+++ b/drivers/base/regmap/regmap-spmi.c
@@ -0,0 +1,90 @@
+/*
+ * Register map access API - SPMI support
+ *
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * Based on regmap-i2c.c:
+ * Copyright 2011 Wolfson Microelectronics plc
+ * Author: 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 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+#include <linux/regmap.h>
+#include <linux/spmi.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+static int regmap_spmi_read(void *context,
+                            const void *reg, size_t reg_size,
+                            void *val, size_t val_size)
+{
+        BUG_ON(reg_size != 2);
+        return spmi_ext_register_readl(context, *(u16 *)reg,
+                                       val, val_size);
+}
+
+static int regmap_spmi_gather_write(void *context,
+                                    const void *reg, size_t reg_size,
+                                    const void *val, size_t val_size)
+{
+        BUG_ON(reg_size != 2);
+        return spmi_ext_register_writel(context, *(u16 *)reg, val, val_size);
+}
+
+static int regmap_spmi_write(void *context, const void *data,
+                             size_t count)
+{
+        BUG_ON(count < 2);
+        return regmap_spmi_gather_write(context, data, 2, data + 2, count - 2);
+}
+
+static struct regmap_bus regmap_spmi = {
+        .read                           = regmap_spmi_read,
+        .write                          = regmap_spmi_write,
+        .gather_write                   = regmap_spmi_gather_write,
+        .reg_format_endian_default      = REGMAP_ENDIAN_NATIVE,
+        .val_format_endian_default      = REGMAP_ENDIAN_NATIVE,
+};
+
+/**
+ * regmap_init_spmi(): Initialize register map
+ *
+ * @sdev: Device that will be interacted with
+ * @config: Configuration for register map
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer to
+ * a struct regmap.
+ */
+struct regmap *regmap_init_spmi(struct spmi_device *sdev,
+                                const struct regmap_config *config)
+{
+        return regmap_init(&sdev->dev, &regmap_spmi, sdev, config);
+}
+EXPORT_SYMBOL_GPL(regmap_init_spmi);
+
+/**
+ * devm_regmap_init_spmi(): Initialise managed register map
+ *
+ * @sdev: Device that will be interacted with
+ * @config: Configuration for register map
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer
+ * to a struct regmap.  The regmap will be automatically freed by the
+ * device management code.
+ */
+struct regmap *devm_regmap_init_spmi(struct spmi_device *sdev,
+                                     const struct regmap_config *config)
+{
+        return devm_regmap_init(&sdev->dev, &regmap_spmi, sdev, config);
+}
+EXPORT_SYMBOL_GPL(devm_regmap_init_spmi);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 7d689a15c500..9c021d9cace0 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -42,15 +42,6 @@ static int _regmap_bus_formatted_write(void *context, unsigned int reg,
 static int _regmap_bus_raw_write(void *context, unsigned int reg,
                                  unsigned int val);
 
-static void async_cleanup(struct work_struct *work)
-{
-        struct regmap_async *async = container_of(work, struct regmap_async,
-                                                  cleanup);
-
-        kfree(async->work_buf);
-        kfree(async);
-}
-
 bool regmap_reg_in_ranges(unsigned int reg,
                           const struct regmap_range *ranges,
                           unsigned int nranges)
@@ -465,6 +456,7 @@ struct regmap *regmap_init(struct device *dev,
 
         spin_lock_init(&map->async_lock);
         INIT_LIST_HEAD(&map->async_list);
+        INIT_LIST_HEAD(&map->async_free);
         init_waitqueue_head(&map->async_waitq);
 
         if (config->read_flag_mask || config->write_flag_mask) {
@@ -821,6 +813,8 @@ static void regmap_field_init(struct regmap_field *rm_field,
         rm_field->reg = reg_field.reg;
         rm_field->shift = reg_field.lsb;
         rm_field->mask = ((BIT(field_bits) - 1) << reg_field.lsb);
+        rm_field->id_size = reg_field.id_size;
+        rm_field->id_offset = reg_field.id_offset;
 }
 
 /**
@@ -942,12 +936,22 @@ EXPORT_SYMBOL_GPL(regmap_reinit_cache);
  */
 void regmap_exit(struct regmap *map)
 {
+        struct regmap_async *async;
+
         regcache_exit(map);
         regmap_debugfs_exit(map);
         regmap_range_exit(map);
         if (map->bus && map->bus->free_context)
                 map->bus->free_context(map->bus_context);
         kfree(map->work_buf);
+        while (!list_empty(&map->async_free)) {
+                async = list_first_entry_or_null(&map->async_free,
+                                                 struct regmap_async,
+                                                 list);
+                list_del(&async->list);
+                kfree(async->work_buf);
+                kfree(async);
+        }
         kfree(map);
 }
 EXPORT_SYMBOL_GPL(regmap_exit);
@@ -1039,7 +1043,7 @@ static int _regmap_select_page(struct regmap *map, unsigned int *reg,
 }
 
 int _regmap_raw_write(struct regmap *map, unsigned int reg,
-                      const void *val, size_t val_len, bool async)
+                      const void *val, size_t val_len)
 {
         struct regmap_range_node *range;
         unsigned long flags;
@@ -1091,7 +1095,7 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
                         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, async);
+                                                map->format.val_bytes);
                         if (ret != 0)
                                 return ret;
 
@@ -1114,49 +1118,72 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
 
         u8[0] |= map->write_flag_mask;
 
-        if (async && map->bus->async_write) {
-                struct regmap_async *async = map->bus->async_alloc();
-                if (!async)
-                        return -ENOMEM;
+        /*
+         * Essentially all I/O mechanisms will be faster with a single
+         * buffer to write.  Since register syncs often generate raw
+         * writes of single registers optimise that case.
+         */
+        if (val != work_val && val_len == map->format.val_bytes) {
+                memcpy(work_val, val, map->format.val_bytes);
+                val = work_val;
+        }
+
+        if (map->async && map->bus->async_write) {
+                struct regmap_async *async;
 
                 trace_regmap_async_write_start(map->dev, reg, val_len);
 
-                async->work_buf = kzalloc(map->format.buf_size,
-                                          GFP_KERNEL | GFP_DMA);
-                if (!async->work_buf) {
-                        kfree(async);
-                        return -ENOMEM;
+                spin_lock_irqsave(&map->async_lock, flags);
+                async = list_first_entry_or_null(&map->async_free,
+                                                 struct regmap_async,
+                                                 list);
+                if (async)
+                        list_del(&async->list);
+                spin_unlock_irqrestore(&map->async_lock, flags);
+
+                if (!async) {
+                        async = map->bus->async_alloc();
+                        if (!async)
+                                return -ENOMEM;
+
+                        async->work_buf = kzalloc(map->format.buf_size,
+                                                  GFP_KERNEL | GFP_DMA);
+                        if (!async->work_buf) {
+                                kfree(async);
+                                return -ENOMEM;
+                        }
                 }
 
-                INIT_WORK(&async->cleanup, async_cleanup);
                 async->map = map;
 
                 /* If the caller supplied the value we can use it safely. */
                 memcpy(async->work_buf, map->work_buf, map->format.pad_bytes +
                        map->format.reg_bytes + map->format.val_bytes);
-                if (val == work_val)
-                        val = async->work_buf + map->format.pad_bytes +
-                                map->format.reg_bytes;
 
                 spin_lock_irqsave(&map->async_lock, flags);
                 list_add_tail(&async->list, &map->async_list);
                 spin_unlock_irqrestore(&map->async_lock, flags);
 
-                ret = map->bus->async_write(map->bus_context, async->work_buf,
-                                            map->format.reg_bytes +
-                                            map->format.pad_bytes,
-                                            val, val_len, async);
+                if (val != work_val)
+                        ret = map->bus->async_write(map->bus_context,
+                                                    async->work_buf,
+                                                    map->format.reg_bytes +
+                                                    map->format.pad_bytes,
+                                                    val, val_len, async);
+                else
+                        ret = map->bus->async_write(map->bus_context,
+                                                    async->work_buf,
+                                                    map->format.reg_bytes +
+                                                    map->format.pad_bytes +
+                                                    val_len, NULL, 0, async);
 
                 if (ret != 0) {
                         dev_err(map->dev, "Failed to schedule write: %d\n",
                                 ret);
 
                         spin_lock_irqsave(&map->async_lock, flags);
-                        list_del(&async->list);
+                        list_move(&async->list, &map->async_free);
                         spin_unlock_irqrestore(&map->async_lock, flags);
-
-                        kfree(async->work_buf);
-                        kfree(async);
                 }
 
                 return ret;
@@ -1253,7 +1280,7 @@ static int _regmap_bus_raw_write(void *context, unsigned int reg,
                                  map->work_buf +
                                  map->format.reg_bytes +
                                  map->format.pad_bytes,
-                                 map->format.val_bytes, false);
+                                 map->format.val_bytes);
 }
 
 static inline void *_regmap_map_get_context(struct regmap *map)
@@ -1318,6 +1345,37 @@ int regmap_write(struct regmap *map, unsigned int reg, unsigned int val)
 EXPORT_SYMBOL_GPL(regmap_write);
 
 /**
+ * regmap_write_async(): Write a value to a single register asynchronously
+ *
+ * @map: Register map to write to
+ * @reg: Register to write to
+ * @val: Value to be written
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_write_async(struct regmap *map, unsigned int reg, unsigned int val)
+{
+        int ret;
+
+        if (reg % map->reg_stride)
+                return -EINVAL;
+
+        map->lock(map->lock_arg);
+
+        map->async = true;
+
+        ret = _regmap_write(map, reg, val);
+
+        map->async = false;
+
+        map->unlock(map->lock_arg);
+
+        return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_write_async);
+
+/**
  * regmap_raw_write(): Write raw values to one or more registers
  *
  * @map: Register map to write to
@@ -1345,7 +1403,7 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
 
         map->lock(map->lock_arg);
 
-        ret = _regmap_raw_write(map, reg, val, val_len, false);
+        ret = _regmap_raw_write(map, reg, val, val_len);
 
         map->unlock(map->lock_arg);
 
@@ -1369,6 +1427,74 @@ int regmap_field_write(struct regmap_field *field, unsigned int val)
 }
 EXPORT_SYMBOL_GPL(regmap_field_write);
 
+/**
+ * regmap_field_update_bits():  Perform a read/modify/write cycle
+ *                              on the register field
+ *
+ * @field: Register field to write to
+ * @mask: Bitmask to change
+ * @val: Value to be written
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_field_update_bits(struct regmap_field *field, unsigned int mask, unsigned int val)
+{
+        mask = (mask << field->shift) & field->mask;
+
+        return regmap_update_bits(field->regmap, field->reg,
+                                  mask, val << field->shift);
+}
+EXPORT_SYMBOL_GPL(regmap_field_update_bits);
+
+/**
+ * regmap_fields_write(): Write a value to a single register field with port ID
+ *
+ * @field: Register field to write to
+ * @id: port ID
+ * @val: Value to be written
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_fields_write(struct regmap_field *field, unsigned int id,
+                        unsigned int val)
+{
+        if (id >= field->id_size)
+                return -EINVAL;
+
+        return regmap_update_bits(field->regmap,
+                                  field->reg + (field->id_offset * id),
+                                  field->mask, val << field->shift);
+}
+EXPORT_SYMBOL_GPL(regmap_fields_write);
+
+/**
+ * regmap_fields_update_bits(): Perform a read/modify/write cycle
+ *                              on the register field
+ *
+ * @field: Register field to write to
+ * @id: port ID
+ * @mask: Bitmask to change
+ * @val: Value to be written
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_fields_update_bits(struct regmap_field *field,  unsigned int id,
+                              unsigned int mask, unsigned int val)
+{
+        if (id >= field->id_size)
+                return -EINVAL;
+
+        mask = (mask << field->shift) & field->mask;
+
+        return regmap_update_bits(field->regmap,
+                                  field->reg + (field->id_offset * id),
+                                  mask, val << field->shift);
+}
+EXPORT_SYMBOL_GPL(regmap_fields_update_bits);
+
 /*
  * regmap_bulk_write(): Write multiple registers to the device
  *
@@ -1418,16 +1544,15 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
          */
         if (map->use_single_rw) {
                 for (i = 0; i < val_count; i++) {
-                        ret = regmap_raw_write(map,
-                                               reg + (i * map->reg_stride),
-                                               val + (i * val_bytes),
-                                               val_bytes);
+                        ret = _regmap_raw_write(map,
+                                                reg + (i * map->reg_stride),
+                                                val + (i * val_bytes),
+                                                val_bytes);
                         if (ret != 0)
                                 return ret;
                 }
         } else {
-                ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count,
-                                        false);
+                ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count);
         }
 
         if (val_bytes != 1)
@@ -1439,6 +1564,47 @@ out:
 }
 EXPORT_SYMBOL_GPL(regmap_bulk_write);
 
+/*
+ * regmap_multi_reg_write(): Write multiple registers to the device
+ *
+ * where the set of register are supplied in any order
+ *
+ * @map: Register map to write to
+ * @regs: Array of structures containing register,value to be written
+ * @num_regs: Number of registers to write
+ *
+ * This function is intended to be used for writing a large block of data
+ * atomically to the device in single transfer for those I2C client devices
+ * that implement this alternative block write mode.
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_multi_reg_write(struct regmap *map, struct reg_default *regs,
+                                int num_regs)
+{
+        int ret = 0, i;
+
+        for (i = 0; i < num_regs; i++) {
+                int reg = regs[i].reg;
+                if (reg % map->reg_stride)
+                        return -EINVAL;
+        }
+
+        map->lock(map->lock_arg);
+
+        for (i = 0; i < num_regs; i++) {
+                ret = _regmap_write(map, regs[i].reg, regs[i].def);
+                if (ret != 0)
+                        goto out;
+        }
+out:
+        map->unlock(map->lock_arg);
+
+        return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_multi_reg_write);
+
 /**
  * regmap_raw_write_async(): Write raw values to one or more registers
  *                           asynchronously
@@ -1473,7 +1639,11 @@ int regmap_raw_write_async(struct regmap *map, unsigned int reg,
 
         map->lock(map->lock_arg);
 
-        ret = _regmap_raw_write(map, reg, val, val_len, true);
+        map->async = true;
+
+        ret = _regmap_raw_write(map, reg, val, val_len);
+
+        map->async = false;
 
         map->unlock(map->lock_arg);
 
@@ -1677,6 +1847,39 @@ int regmap_field_read(struct regmap_field *field, unsigned int *val)
 EXPORT_SYMBOL_GPL(regmap_field_read);
 
 /**
+ * regmap_fields_read(): Read a value to a single register field with port ID
+ *
+ * @field: Register field to read from
+ * @id: port ID
+ * @val: Pointer to store read value
+ *
+ * A value of zero will be returned on success, a negative errno will
+ * be returned in error cases.
+ */
+int regmap_fields_read(struct regmap_field *field, unsigned int id,
+                       unsigned int *val)
+{
+        int ret;
+        unsigned int reg_val;
+
+        if (id >= field->id_size)
+                return -EINVAL;
+
+        ret = regmap_read(field->regmap,
+                          field->reg + (field->id_offset * id),
+                          &reg_val);
+        if (ret != 0)
+                return ret;
+
+        reg_val &= field->mask;
+        reg_val >>= field->shift;
+        *val = reg_val;
+
+        return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_fields_read);
+
+/**
  * regmap_bulk_read(): Read multiple registers from the device
  *
  * @map: Register map to write to
@@ -1788,6 +1991,41 @@ int regmap_update_bits(struct regmap *map, unsigned int reg,
 EXPORT_SYMBOL_GPL(regmap_update_bits);
 
 /**
+ * regmap_update_bits_async: Perform a read/modify/write cycle on the register
+ *                           map asynchronously
+ *
+ * @map: Register map to update
+ * @reg: Register to update
+ * @mask: Bitmask to change
+ * @val: New value for bitmask
+ *
+ * With most buses the read must be done synchronously so this is most
+ * useful for devices with a cache which do not need to interact with
+ * the hardware to determine the current register value.
+ *
+ * Returns zero for success, a negative number on error.
+ */
+int regmap_update_bits_async(struct regmap *map, unsigned int reg,
+                             unsigned int mask, unsigned int val)
+{
+        bool change;
+        int ret;
+
+        map->lock(map->lock_arg);
+
+        map->async = true;
+
+        ret = _regmap_update_bits(map, reg, mask, val, &change);
+
+        map->async = false;
+
+        map->unlock(map->lock_arg);
+
+        return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_update_bits_async);
+
+/**
  * regmap_update_bits_check: Perform a read/modify/write cycle on the
  *                           register map and report if updated
  *
@@ -1812,6 +2050,43 @@ int regmap_update_bits_check(struct regmap *map, unsigned int reg,
 }
 EXPORT_SYMBOL_GPL(regmap_update_bits_check);
 
+/**
+ * regmap_update_bits_check_async: Perform a read/modify/write cycle on the
+ *                                 register map asynchronously and report if
+ *                                 updated
+ *
+ * @map: Register map to update
+ * @reg: Register to update
+ * @mask: Bitmask to change
+ * @val: New value for bitmask
+ * @change: Boolean indicating if a write was done
+ *
+ * With most buses the read must be done synchronously so this is most
+ * useful for devices with a cache which do not need to interact with
+ * the hardware to determine the current register value.
+ *
+ * Returns zero for success, a negative number on error.
+ */
+int regmap_update_bits_check_async(struct regmap *map, unsigned int reg,
+                                   unsigned int mask, unsigned int val,
+                                   bool *change)
+{
+        int ret;
+
+        map->lock(map->lock_arg);
+
+        map->async = true;
+
+        ret = _regmap_update_bits(map, reg, mask, val, change);
+
+        map->async = false;
+
+        map->unlock(map->lock_arg);
+
+        return ret;
+}
+EXPORT_SYMBOL_GPL(regmap_update_bits_check_async);
+
 void regmap_async_complete_cb(struct regmap_async *async, int ret)
 {
         struct regmap *map = async->map;
@@ -1820,8 +2095,7 @@ void regmap_async_complete_cb(struct regmap_async *async, int ret)
         trace_regmap_async_io_complete(map->dev);
 
         spin_lock(&map->async_lock);
-
-        list_del(&async->list);
+        list_move(&async->list, &map->async_free);
         wake = list_empty(&map->async_list);
 
         if (ret != 0)
@@ -1829,8 +2103,6 @@ void regmap_async_complete_cb(struct regmap_async *async, int ret)
 
         spin_unlock(&map->async_lock);
 
-        schedule_work(&async->cleanup);
-
         if (wake)
                 wake_up(&map->async_waitq);
 }
@@ -1906,6 +2178,7 @@ int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
         bypass = map->cache_bypass;
 
         map->cache_bypass = true;
+        map->async = true;
 
         /* Write out first; it's useful to apply even if we fail later. */
         for (i = 0; i < num_regs; i++) {
@@ -1929,10 +2202,13 @@ int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
         }
 
 out:
+        map->async = false;
         map->cache_bypass = bypass;
 
         map->unlock(map->lock_arg);
 
+        regmap_async_complete(map);
+
         return ret;
 }
 EXPORT_SYMBOL_GPL(regmap_register_patch);