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Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/bus.c82
-rw-r--r--drivers/base/class.c29
-rw-r--r--drivers/base/core.c88
-rw-r--r--drivers/base/devres.c31
-rw-r--r--drivers/base/firmware_class.c38
-rw-r--r--drivers/base/memory.c7
-rw-r--r--drivers/base/platform.c17
-rw-r--r--drivers/base/regmap/Kconfig5
-rw-r--r--drivers/base/regmap/Makefile1
-rw-r--r--drivers/base/regmap/internal.h8
-rw-r--r--drivers/base/regmap/regcache.c19
-rw-r--r--drivers/base/regmap/regmap-debugfs.c57
-rw-r--r--drivers/base/regmap/regmap-irq.c16
-rw-r--r--drivers/base/regmap/regmap-spi.c3
-rw-r--r--drivers/base/regmap/regmap-spmi.c90
-rw-r--r--drivers/base/regmap/regmap.c366
16 files changed, 587 insertions, 270 deletions
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 4c289ab..73f6c29 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -591,37 +591,6 @@ void bus_remove_device(struct device *dev)
bus_put(dev->bus);
}
-static int driver_add_attrs(struct bus_type *bus, struct device_driver *drv)
-{
- int error = 0;
- int i;
-
- if (bus->drv_attrs) {
- for (i = 0; bus->drv_attrs[i].attr.name; i++) {
- error = driver_create_file(drv, &bus->drv_attrs[i]);
- if (error)
- goto err;
- }
- }
-done:
- return error;
-err:
- while (--i >= 0)
- driver_remove_file(drv, &bus->drv_attrs[i]);
- goto done;
-}
-
-static void driver_remove_attrs(struct bus_type *bus,
- struct device_driver *drv)
-{
- int i;
-
- if (bus->drv_attrs) {
- for (i = 0; bus->drv_attrs[i].attr.name; i++)
- driver_remove_file(drv, &bus->drv_attrs[i]);
- }
-}
-
static int __must_check add_bind_files(struct device_driver *drv)
{
int ret;
@@ -720,16 +689,12 @@ int bus_add_driver(struct device_driver *drv)
printk(KERN_ERR "%s: uevent attr (%s) failed\n",
__func__, drv->name);
}
- error = driver_add_attrs(bus, drv);
+ error = driver_add_groups(drv, bus->drv_groups);
if (error) {
/* How the hell do we get out of this pickle? Give up */
- printk(KERN_ERR "%s: driver_add_attrs(%s) failed\n",
- __func__, drv->name);
- }
- error = driver_add_groups(drv, bus->drv_groups);
- if (error)
printk(KERN_ERR "%s: driver_create_groups(%s) failed\n",
__func__, drv->name);
+ }
if (!drv->suppress_bind_attrs) {
error = add_bind_files(drv);
@@ -766,7 +731,6 @@ void bus_remove_driver(struct device_driver *drv)
if (!drv->suppress_bind_attrs)
remove_bind_files(drv);
- driver_remove_attrs(drv->bus, drv);
driver_remove_groups(drv, drv->bus->drv_groups);
driver_remove_file(drv, &driver_attr_uevent);
klist_remove(&drv->p->knode_bus);
@@ -846,42 +810,6 @@ struct bus_type *find_bus(char *name)
}
#endif /* 0 */
-
-/**
- * bus_add_attrs - Add default attributes for this bus.
- * @bus: Bus that has just been registered.
- */
-
-static int bus_add_attrs(struct bus_type *bus)
-{
- int error = 0;
- int i;
-
- if (bus->bus_attrs) {
- for (i = 0; bus->bus_attrs[i].attr.name; i++) {
- error = bus_create_file(bus, &bus->bus_attrs[i]);
- if (error)
- goto err;
- }
- }
-done:
- return error;
-err:
- while (--i >= 0)
- bus_remove_file(bus, &bus->bus_attrs[i]);
- goto done;
-}
-
-static void bus_remove_attrs(struct bus_type *bus)
-{
- int i;
-
- if (bus->bus_attrs) {
- for (i = 0; bus->bus_attrs[i].attr.name; i++)
- bus_remove_file(bus, &bus->bus_attrs[i]);
- }
-}
-
static int bus_add_groups(struct bus_type *bus,
const struct attribute_group **groups)
{
@@ -983,9 +911,6 @@ int bus_register(struct bus_type *bus)
if (retval)
goto bus_probe_files_fail;
- retval = bus_add_attrs(bus);
- if (retval)
- goto bus_attrs_fail;
retval = bus_add_groups(bus, bus->bus_groups);
if (retval)
goto bus_groups_fail;
@@ -994,8 +919,6 @@ int bus_register(struct bus_type *bus)
return 0;
bus_groups_fail:
- bus_remove_attrs(bus);
-bus_attrs_fail:
remove_probe_files(bus);
bus_probe_files_fail:
kset_unregister(bus->p->drivers_kset);
@@ -1024,7 +947,6 @@ void bus_unregister(struct bus_type *bus)
pr_debug("bus: '%s': unregistering\n", bus->name);
if (bus->dev_root)
device_unregister(bus->dev_root);
- bus_remove_attrs(bus);
bus_remove_groups(bus, bus->bus_groups);
remove_probe_files(bus);
kset_unregister(bus->p->drivers_kset);
diff --git a/drivers/base/class.c b/drivers/base/class.c
index 8b7818b..f96f704 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -47,18 +47,6 @@ static ssize_t class_attr_store(struct kobject *kobj, struct attribute *attr,
return ret;
}
-static const void *class_attr_namespace(struct kobject *kobj,
- const struct attribute *attr)
-{
- struct class_attribute *class_attr = to_class_attr(attr);
- struct subsys_private *cp = to_subsys_private(kobj);
- const void *ns = NULL;
-
- if (class_attr->namespace)
- ns = class_attr->namespace(cp->class, class_attr);
- return ns;
-}
-
static void class_release(struct kobject *kobj)
{
struct subsys_private *cp = to_subsys_private(kobj);
@@ -86,7 +74,6 @@ static const struct kobj_ns_type_operations *class_child_ns_type(struct kobject
static const struct sysfs_ops class_sysfs_ops = {
.show = class_attr_show,
.store = class_attr_store,
- .namespace = class_attr_namespace,
};
static struct kobj_type class_ktype = {
@@ -99,21 +86,23 @@ static struct kobj_type class_ktype = {
static struct kset *class_kset;
-int class_create_file(struct class *cls, const struct class_attribute *attr)
+int class_create_file_ns(struct class *cls, const struct class_attribute *attr,
+ const void *ns)
{
int error;
if (cls)
- error = sysfs_create_file(&cls->p->subsys.kobj,
- &attr->attr);
+ error = sysfs_create_file_ns(&cls->p->subsys.kobj,
+ &attr->attr, ns);
else
error = -EINVAL;
return error;
}
-void class_remove_file(struct class *cls, const struct class_attribute *attr)
+void class_remove_file_ns(struct class *cls, const struct class_attribute *attr,
+ const void *ns)
{
if (cls)
- sysfs_remove_file(&cls->p->subsys.kobj, &attr->attr);
+ sysfs_remove_file_ns(&cls->p->subsys.kobj, &attr->attr, ns);
}
static struct class *class_get(struct class *cls)
@@ -600,8 +589,8 @@ int __init classes_init(void)
return 0;
}
-EXPORT_SYMBOL_GPL(class_create_file);
-EXPORT_SYMBOL_GPL(class_remove_file);
+EXPORT_SYMBOL_GPL(class_create_file_ns);
+EXPORT_SYMBOL_GPL(class_remove_file_ns);
EXPORT_SYMBOL_GPL(class_unregister);
EXPORT_SYMBOL_GPL(class_destroy);
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 34abf4d..67b180d 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -455,64 +455,6 @@ static ssize_t online_store(struct device *dev, struct device_attribute *attr,
}
static DEVICE_ATTR_RW(online);
-static int device_add_attributes(struct device *dev,
- struct device_attribute *attrs)
-{
- int error = 0;
- int i;
-
- if (attrs) {
- for (i = 0; attrs[i].attr.name; i++) {
- error = device_create_file(dev, &attrs[i]);
- if (error)
- break;
- }
- if (error)
- while (--i >= 0)
- device_remove_file(dev, &attrs[i]);
- }
- return error;
-}
-
-static void device_remove_attributes(struct device *dev,
- struct device_attribute *attrs)
-{
- int i;
-
- if (attrs)
- for (i = 0; attrs[i].attr.name; i++)
- device_remove_file(dev, &attrs[i]);
-}
-
-static int device_add_bin_attributes(struct device *dev,
- struct bin_attribute *attrs)
-{
- int error = 0;
- int i;
-
- if (attrs) {
- for (i = 0; attrs[i].attr.name; i++) {
- error = device_create_bin_file(dev, &attrs[i]);
- if (error)
- break;
- }
- if (error)
- while (--i >= 0)
- device_remove_bin_file(dev, &attrs[i]);
- }
- return error;
-}
-
-static void device_remove_bin_attributes(struct device *dev,
- struct bin_attribute *attrs)
-{
- int i;
-
- if (attrs)
- for (i = 0; attrs[i].attr.name; i++)
- device_remove_bin_file(dev, &attrs[i]);
-}
-
int device_add_groups(struct device *dev, const struct attribute_group **groups)
{
return sysfs_create_groups(&dev->kobj, groups);
@@ -534,18 +476,12 @@ static int device_add_attrs(struct device *dev)
error = device_add_groups(dev, class->dev_groups);
if (error)
return error;
- error = device_add_attributes(dev, class->dev_attrs);
- if (error)
- goto err_remove_class_groups;
- error = device_add_bin_attributes(dev, class->dev_bin_attrs);
- if (error)
- goto err_remove_class_attrs;
}
if (type) {
error = device_add_groups(dev, type->groups);
if (error)
- goto err_remove_class_bin_attrs;
+ goto err_remove_class_groups;
}
error = device_add_groups(dev, dev->groups);
@@ -563,12 +499,6 @@ static int device_add_attrs(struct device *dev)
err_remove_type_groups:
if (type)
device_remove_groups(dev, type->groups);
- err_remove_class_bin_attrs:
- if (class)
- device_remove_bin_attributes(dev, class->dev_bin_attrs);
- err_remove_class_attrs:
- if (class)
- device_remove_attributes(dev, class->dev_attrs);
err_remove_class_groups:
if (class)
device_remove_groups(dev, class->dev_groups);
@@ -587,11 +517,8 @@ static void device_remove_attrs(struct device *dev)
if (type)
device_remove_groups(dev, type->groups);
- if (class) {
- device_remove_attributes(dev, class->dev_attrs);
- device_remove_bin_attributes(dev, class->dev_bin_attrs);
+ if (class)
device_remove_groups(dev, class->dev_groups);
- }
}
static ssize_t dev_show(struct device *dev, struct device_attribute *attr,
@@ -1881,6 +1808,7 @@ EXPORT_SYMBOL_GPL(device_destroy);
*/
int device_rename(struct device *dev, const char *new_name)
{
+ struct kobject *kobj = &dev->kobj;
char *old_device_name = NULL;
int error;
@@ -1888,8 +1816,7 @@ int device_rename(struct device *dev, const char *new_name)
if (!dev)
return -EINVAL;
- pr_debug("device: '%s': %s: renaming to '%s'\n", dev_name(dev),
- __func__, new_name);
+ dev_dbg(dev, "renaming to %s\n", new_name);
old_device_name = kstrdup(dev_name(dev), GFP_KERNEL);
if (!old_device_name) {
@@ -1898,13 +1825,14 @@ int device_rename(struct device *dev, const char *new_name)
}
if (dev->class) {
- error = sysfs_rename_link(&dev->class->p->subsys.kobj,
- &dev->kobj, old_device_name, new_name);
+ error = sysfs_rename_link_ns(&dev->class->p->subsys.kobj,
+ kobj, old_device_name,
+ new_name, kobject_namespace(kobj));
if (error)
goto out;
}
- error = kobject_rename(&dev->kobj, new_name);
+ error = kobject_rename(kobj, new_name);
if (error)
goto out;
diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index 507379e..545c4de 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -91,7 +91,8 @@ static __always_inline struct devres * alloc_dr(dr_release_t release,
if (unlikely(!dr))
return NULL;
- memset(dr, 0, tot_size);
+ memset(dr, 0, offsetof(struct devres, data));
+
INIT_LIST_HEAD(&dr->node.entry);
dr->node.release = release;
return dr;
@@ -110,7 +111,7 @@ void * __devres_alloc(dr_release_t release, size_t size, gfp_t gfp,
{
struct devres *dr;
- dr = alloc_dr(release, size, gfp);
+ dr = alloc_dr(release, size, gfp | __GFP_ZERO);
if (unlikely(!dr))
return NULL;
set_node_dbginfo(&dr->node, name, size);
@@ -135,7 +136,7 @@ void * devres_alloc(dr_release_t release, size_t size, gfp_t gfp)
{
struct devres *dr;
- dr = alloc_dr(release, size, gfp);
+ dr = alloc_dr(release, size, gfp | __GFP_ZERO);
if (unlikely(!dr))
return NULL;
return dr->data;
@@ -745,58 +746,62 @@ void devm_remove_action(struct device *dev, void (*action)(void *), void *data)
EXPORT_SYMBOL_GPL(devm_remove_action);
/*
- * Managed kzalloc/kfree
+ * Managed kmalloc/kfree
*/
-static void devm_kzalloc_release(struct device *dev, void *res)
+static void devm_kmalloc_release(struct device *dev, void *res)
{
/* noop */
}
-static int devm_kzalloc_match(struct device *dev, void *res, void *data)
+static int devm_kmalloc_match(struct device *dev, void *res, void *data)
{
return res == data;
}
/**
- * devm_kzalloc - Resource-managed kzalloc
+ * devm_kmalloc - Resource-managed kmalloc
* @dev: Device to allocate memory for
* @size: Allocation size
* @gfp: Allocation gfp flags
*
- * Managed kzalloc. Memory allocated with this function is
+ * Managed kmalloc. Memory allocated with this function is
* automatically freed on driver detach. Like all other devres
* resources, guaranteed alignment is unsigned long long.
*
* RETURNS:
* Pointer to allocated memory on success, NULL on failure.
*/
-void * devm_kzalloc(struct device *dev, size_t size, gfp_t gfp)
+void * devm_kmalloc(struct device *dev, size_t size, gfp_t gfp)
{
struct devres *dr;
/* use raw alloc_dr for kmalloc caller tracing */
- dr = alloc_dr(devm_kzalloc_release, size, gfp);
+ dr = alloc_dr(devm_kmalloc_release, size, gfp);
if (unlikely(!dr))
return NULL;
+ /*
+ * This is named devm_kzalloc_release for historical reasons
+ * The initial implementation did not support kmalloc, only kzalloc
+ */
set_node_dbginfo(&dr->node, "devm_kzalloc_release", size);
devres_add(dev, dr->data);
return dr->data;
}
-EXPORT_SYMBOL_GPL(devm_kzalloc);
+EXPORT_SYMBOL_GPL(devm_kmalloc);
/**
* devm_kfree - Resource-managed kfree
* @dev: Device this memory belongs to
* @p: Memory to free
*
- * Free memory allocated with devm_kzalloc().
+ * Free memory allocated with devm_kmalloc().
*/
void devm_kfree(struct device *dev, void *p)
{
int rc;
- rc = devres_destroy(dev, devm_kzalloc_release, devm_kzalloc_match, p);
+ rc = devres_destroy(dev, devm_kmalloc_release, devm_kmalloc_match, p);
WARN_ON(rc);
}
EXPORT_SYMBOL_GPL(devm_kfree);
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 10a4467..eb8fb94 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -282,31 +282,35 @@ static noinline_for_stack long fw_file_size(struct file *file)
return st.size;
}
-static bool fw_read_file_contents(struct file *file, struct firmware_buf *fw_buf)
+static int fw_read_file_contents(struct file *file, struct firmware_buf *fw_buf)
{
long size;
char *buf;
+ int rc;
size = fw_file_size(file);
if (size <= 0)
- return false;
+ return -EINVAL;
buf = vmalloc(size);
if (!buf)
- return false;
- if (kernel_read(file, 0, buf, size) != size) {
+ return -ENOMEM;
+ rc = kernel_read(file, 0, buf, size);
+ if (rc != size) {
+ if (rc > 0)
+ rc = -EIO;
vfree(buf);
- return false;
+ return rc;
}
fw_buf->data = buf;
fw_buf->size = size;
- return true;
+ return 0;
}
-static bool fw_get_filesystem_firmware(struct device *device,
+static int fw_get_filesystem_firmware(struct device *device,
struct firmware_buf *buf)
{
int i;
- bool success = false;
+ int rc = -ENOENT;
char *path = __getname();
for (i = 0; i < ARRAY_SIZE(fw_path); i++) {
@@ -321,14 +325,17 @@ static bool fw_get_filesystem_firmware(struct device *device,
file = filp_open(path, O_RDONLY, 0);
if (IS_ERR(file))
continue;
- success = fw_read_file_contents(file, buf);
+ rc = fw_read_file_contents(file, buf);
fput(file);
- if (success)
+ if (rc)
+ dev_warn(device, "firmware, attempted to load %s, but failed with error %d\n",
+ path, rc);
+ else
break;
}
__putname(path);
- if (success) {
+ if (!rc) {
dev_dbg(device, "firmware: direct-loading firmware %s\n",
buf->fw_id);
mutex_lock(&fw_lock);
@@ -337,7 +344,7 @@ static bool fw_get_filesystem_firmware(struct device *device,
mutex_unlock(&fw_lock);
}
- return success;
+ return rc;
}
/* firmware holds the ownership of pages */
@@ -1086,9 +1093,14 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
}
}
- if (!fw_get_filesystem_firmware(device, fw->priv))
+ ret = fw_get_filesystem_firmware(device, fw->priv);
+ if (ret) {
+ dev_warn(device, "Direct firmware load failed with error %d\n",
+ ret);
+ dev_warn(device, "Falling back to user helper\n");
ret = fw_load_from_user_helper(fw, name, device,
uevent, nowait, timeout);
+ }
/* don't cache firmware handled without uevent */
if (!ret)
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 9e59f65..bece691 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -333,8 +333,10 @@ store_mem_state(struct device *dev,
online_type = ONLINE_KEEP;
else if (!strncmp(buf, "offline", min_t(int, count, 7)))
online_type = -1;
- else
- return -EINVAL;
+ else {
+ ret = -EINVAL;
+ goto err;
+ }
switch (online_type) {
case ONLINE_KERNEL:
@@ -357,6 +359,7 @@ store_mem_state(struct device *dev,
ret = -EINVAL; /* should never happen */
}
+err:
unlock_device_hotplug();
if (ret)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 4f8bef3..47051cd 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -488,6 +488,11 @@ static int platform_drv_probe(struct device *_dev)
if (ret && ACPI_HANDLE(_dev))
acpi_dev_pm_detach(_dev, true);
+ if (drv->prevent_deferred_probe && ret == -EPROBE_DEFER) {
+ dev_warn(_dev, "probe deferral not supported\n");
+ ret = -ENXIO;
+ }
+
return ret;
}
@@ -553,8 +558,7 @@ EXPORT_SYMBOL_GPL(platform_driver_unregister);
/**
* platform_driver_probe - register driver for non-hotpluggable device
* @drv: platform driver structure
- * @probe: the driver probe routine, probably from an __init section,
- * must not return -EPROBE_DEFER.
+ * @probe: the driver probe routine, probably from an __init section
*
* Use this instead of platform_driver_register() when you know the device
* is not hotpluggable and has already been registered, and you want to
@@ -565,8 +569,7 @@ EXPORT_SYMBOL_GPL(platform_driver_unregister);
* into system-on-chip processors, where the controller devices have been
* configured as part of board setup.
*
- * This is incompatible with deferred probing so probe() must not
- * return -EPROBE_DEFER.
+ * Note that this is incompatible with deferred probing.
*
* Returns zero if the driver registered and bound to a device, else returns
* a negative error code and with the driver not registered.
@@ -576,6 +579,12 @@ int __init_or_module platform_driver_probe(struct platform_driver *drv,
{
int retval, code;
+ /*
+ * Prevent driver from requesting probe deferral to avoid further
+ * futile probe attempts.
+ */
+ drv->prevent_deferred_probe = true;
+
/* make sure driver won't have bind/unbind attributes */
drv->driver.suppress_bind_attrs = true;
diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig
index f0d3054..4251570 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 cf12998..a7c670b 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 57f7778..33414b1 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 d6c2d69..d4dd771 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 de11eca..c5471cd 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 d10456f..763c60d 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 4c506bd..37f12ae 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 0000000..ac23910
--- /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 7d689a1..9c021d9 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);
generated by cgit v0.10.2 at 2024-08-09 21:01:04 (GMT)