Commit 786856b6 authored by Linus Torvalds's avatar Linus Torvalds

Merge tag 'device-properties-4.11-rc1' of...

Merge tag 'device-properties-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull device property updates from Rafael J. Wysocki:
 "Generic device properties framework updates for v4.11-rc1

  Allow built-in (static) device properties to be declared as constant,
  make it possible to save memory by discarding alternative (but unused)
  built-in (static) property sets and add support for automatic handling
  of built-in properties to the I2C code"

* tag 'device-properties-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  i2c: allow specify device properties in i2c_board_info
  device property: export code duplicating array of property entries
  device property: constify property arrays values
  device property: allow to constify properties
parents 43e31e40 d3e1b617
......@@ -21,7 +21,7 @@
struct property_set {
struct fwnode_handle fwnode;
struct property_entry *properties;
const struct property_entry *properties;
};
static inline bool is_pset_node(struct fwnode_handle *fwnode)
......@@ -35,10 +35,10 @@ static inline struct property_set *to_pset_node(struct fwnode_handle *fwnode)
container_of(fwnode, struct property_set, fwnode) : NULL;
}
static struct property_entry *pset_prop_get(struct property_set *pset,
const char *name)
static const struct property_entry *pset_prop_get(struct property_set *pset,
const char *name)
{
struct property_entry *prop;
const struct property_entry *prop;
if (!pset || !pset->properties)
return NULL;
......@@ -50,11 +50,11 @@ static struct property_entry *pset_prop_get(struct property_set *pset,
return NULL;
}
static void *pset_prop_find(struct property_set *pset, const char *propname,
size_t length)
static const void *pset_prop_find(struct property_set *pset,
const char *propname, size_t length)
{
struct property_entry *prop;
void *pointer;
const struct property_entry *prop;
const void *pointer;
prop = pset_prop_get(pset, propname);
if (!prop)
......@@ -74,7 +74,7 @@ static int pset_prop_read_u8_array(struct property_set *pset,
const char *propname,
u8 *values, size_t nval)
{
void *pointer;
const void *pointer;
size_t length = nval * sizeof(*values);
pointer = pset_prop_find(pset, propname, length);
......@@ -89,7 +89,7 @@ static int pset_prop_read_u16_array(struct property_set *pset,
const char *propname,
u16 *values, size_t nval)
{
void *pointer;
const void *pointer;
size_t length = nval * sizeof(*values);
pointer = pset_prop_find(pset, propname, length);
......@@ -104,7 +104,7 @@ static int pset_prop_read_u32_array(struct property_set *pset,
const char *propname,
u32 *values, size_t nval)
{
void *pointer;
const void *pointer;
size_t length = nval * sizeof(*values);
pointer = pset_prop_find(pset, propname, length);
......@@ -119,7 +119,7 @@ static int pset_prop_read_u64_array(struct property_set *pset,
const char *propname,
u64 *values, size_t nval)
{
void *pointer;
const void *pointer;
size_t length = nval * sizeof(*values);
pointer = pset_prop_find(pset, propname, length);
......@@ -133,7 +133,7 @@ static int pset_prop_read_u64_array(struct property_set *pset,
static int pset_prop_count_elems_of_size(struct property_set *pset,
const char *propname, size_t length)
{
struct property_entry *prop;
const struct property_entry *prop;
prop = pset_prop_get(pset, propname);
if (!prop)
......@@ -146,7 +146,7 @@ static int pset_prop_read_string_array(struct property_set *pset,
const char *propname,
const char **strings, size_t nval)
{
void *pointer;
const void *pointer;
size_t length = nval * sizeof(*strings);
pointer = pset_prop_find(pset, propname, length);
......@@ -160,8 +160,8 @@ static int pset_prop_read_string_array(struct property_set *pset,
static int pset_prop_read_string(struct property_set *pset,
const char *propname, const char **strings)
{
struct property_entry *prop;
const char **pointer;
const struct property_entry *prop;
const char * const *pointer;
prop = pset_prop_get(pset, propname);
if (!prop)
......@@ -682,77 +682,64 @@ int fwnode_property_match_string(struct fwnode_handle *fwnode,
}
EXPORT_SYMBOL_GPL(fwnode_property_match_string);
/**
* pset_free_set - releases memory allocated for copied property set
* @pset: Property set to release
*
* Function takes previously copied property set and releases all the
* memory allocated to it.
*/
static void pset_free_set(struct property_set *pset)
static int property_copy_string_array(struct property_entry *dst,
const struct property_entry *src)
{
const struct property_entry *prop;
size_t i, nval;
char **d;
size_t nval = src->length / sizeof(*d);
int i;
if (!pset)
return;
d = kcalloc(nval, sizeof(*d), GFP_KERNEL);
if (!d)
return -ENOMEM;
for (prop = pset->properties; prop->name; prop++) {
if (prop->is_array) {
if (prop->is_string && prop->pointer.str) {
nval = prop->length / sizeof(const char *);
for (i = 0; i < nval; i++)
kfree(prop->pointer.str[i]);
}
kfree(prop->pointer.raw_data);
} else if (prop->is_string) {
kfree(prop->value.str);
for (i = 0; i < nval; i++) {
d[i] = kstrdup(src->pointer.str[i], GFP_KERNEL);
if (!d[i] && src->pointer.str[i]) {
while (--i >= 0)
kfree(d[i]);
kfree(d);
return -ENOMEM;
}
kfree(prop->name);
}
kfree(pset->properties);
kfree(pset);
dst->pointer.raw_data = d;
return 0;
}
static int pset_copy_entry(struct property_entry *dst,
const struct property_entry *src)
static int property_entry_copy_data(struct property_entry *dst,
const struct property_entry *src)
{
const char **d, **s;
size_t i, nval;
int error;
dst->name = kstrdup(src->name, GFP_KERNEL);
if (!dst->name)
return -ENOMEM;
if (src->is_array) {
if (!src->length)
return -ENODATA;
if (!src->length) {
error = -ENODATA;
goto out_free_name;
}
if (src->is_string) {
nval = src->length / sizeof(const char *);
dst->pointer.str = kcalloc(nval, sizeof(const char *),
GFP_KERNEL);
if (!dst->pointer.str)
return -ENOMEM;
d = dst->pointer.str;
s = src->pointer.str;
for (i = 0; i < nval; i++) {
d[i] = kstrdup(s[i], GFP_KERNEL);
if (!d[i] && s[i])
return -ENOMEM;
}
error = property_copy_string_array(dst, src);
if (error)
goto out_free_name;
} else {
dst->pointer.raw_data = kmemdup(src->pointer.raw_data,
src->length, GFP_KERNEL);
if (!dst->pointer.raw_data)
return -ENOMEM;
if (!dst->pointer.raw_data) {
error = -ENOMEM;
goto out_free_name;
}
}
} else if (src->is_string) {
dst->value.str = kstrdup(src->value.str, GFP_KERNEL);
if (!dst->value.str && src->value.str)
return -ENOMEM;
if (!dst->value.str && src->value.str) {
error = -ENOMEM;
goto out_free_name;
}
} else {
dst->value.raw_data = src->value.raw_data;
}
......@@ -762,6 +749,95 @@ static int pset_copy_entry(struct property_entry *dst,
dst->is_string = src->is_string;
return 0;
out_free_name:
kfree(dst->name);
return error;
}
static void property_entry_free_data(const struct property_entry *p)
{
size_t i, nval;
if (p->is_array) {
if (p->is_string && p->pointer.str) {
nval = p->length / sizeof(const char *);
for (i = 0; i < nval; i++)
kfree(p->pointer.str[i]);
}
kfree(p->pointer.raw_data);
} else if (p->is_string) {
kfree(p->value.str);
}
kfree(p->name);
}
/**
* property_entries_dup - duplicate array of properties
* @properties: array of properties to copy
*
* This function creates a deep copy of the given NULL-terminated array
* of property entries.
*/
struct property_entry *
property_entries_dup(const struct property_entry *properties)
{
struct property_entry *p;
int i, n = 0;
while (properties[n].name)
n++;
p = kcalloc(n + 1, sizeof(*p), GFP_KERNEL);
if (!p)
return ERR_PTR(-ENOMEM);
for (i = 0; i < n; i++) {
int ret = property_entry_copy_data(&p[i], &properties[i]);
if (ret) {
while (--i >= 0)
property_entry_free_data(&p[i]);
kfree(p);
return ERR_PTR(ret);
}
}
return p;
}
EXPORT_SYMBOL_GPL(property_entries_dup);
/**
* property_entries_free - free previously allocated array of properties
* @properties: array of properties to destroy
*
* This function frees given NULL-terminated array of property entries,
* along with their data.
*/
void property_entries_free(const struct property_entry *properties)
{
const struct property_entry *p;
for (p = properties; p->name; p++)
property_entry_free_data(p);
kfree(properties);
}
EXPORT_SYMBOL_GPL(property_entries_free);
/**
* pset_free_set - releases memory allocated for copied property set
* @pset: Property set to release
*
* Function takes previously copied property set and releases all the
* memory allocated to it.
*/
static void pset_free_set(struct property_set *pset)
{
if (!pset)
return;
property_entries_free(pset->properties);
kfree(pset);
}
/**
......@@ -776,32 +852,20 @@ static int pset_copy_entry(struct property_entry *dst,
*/
static struct property_set *pset_copy_set(const struct property_set *pset)
{
const struct property_entry *entry;
struct property_entry *properties;
struct property_set *p;
size_t i, n = 0;
p = kzalloc(sizeof(*p), GFP_KERNEL);
if (!p)
return ERR_PTR(-ENOMEM);
while (pset->properties[n].name)
n++;
p->properties = kcalloc(n + 1, sizeof(*entry), GFP_KERNEL);
if (!p->properties) {
properties = property_entries_dup(pset->properties);
if (IS_ERR(properties)) {
kfree(p);
return ERR_PTR(-ENOMEM);
}
for (i = 0; i < n; i++) {
int ret = pset_copy_entry(&p->properties[i],
&pset->properties[i]);
if (ret) {
pset_free_set(p);
return ERR_PTR(ret);
}
return ERR_CAST(properties);
}
p->properties = properties;
return p;
}
......@@ -847,7 +911,8 @@ EXPORT_SYMBOL_GPL(device_remove_properties);
* @dev as its secondary firmware node. The function takes a copy of
* @properties.
*/
int device_add_properties(struct device *dev, struct property_entry *properties)
int device_add_properties(struct device *dev,
const struct property_entry *properties)
{
struct property_set *p, pset;
......
......@@ -1336,15 +1336,29 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
client->dev.fwnode = info->fwnode;
i2c_dev_set_name(adap, client);
if (info->properties) {
status = device_add_properties(&client->dev, info->properties);
if (status) {
dev_err(&adap->dev,
"Failed to add properties to client %s: %d\n",
client->name, status);
goto out_err;
}
}
status = device_register(&client->dev);
if (status)
goto out_err;
goto out_free_props;
dev_dbg(&adap->dev, "client [%s] registered with bus id %s\n",
client->name, dev_name(&client->dev));
return client;
out_free_props:
if (info->properties)
device_remove_properties(&client->dev);
out_err:
dev_err(&adap->dev,
"Failed to register i2c client %s at 0x%02x (%d)\n",
......
......@@ -51,6 +51,7 @@ enum i2c_slave_event;
typedef int (*i2c_slave_cb_t)(struct i2c_client *, enum i2c_slave_event, u8 *);
struct module;
struct property_entry;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
/*
......@@ -299,6 +300,7 @@ static inline int i2c_slave_event(struct i2c_client *client,
* @archdata: copied into i2c_client.dev.archdata
* @of_node: pointer to OpenFirmware device node
* @fwnode: device node supplied by the platform firmware
* @properties: additional device properties for the device
* @irq: stored in i2c_client.irq
*
* I2C doesn't actually support hardware probing, although controllers and
......@@ -320,6 +322,7 @@ struct i2c_board_info {
struct dev_archdata *archdata;
struct device_node *of_node;
struct fwnode_handle *fwnode;
const struct property_entry *properties;
int irq;
};
......
......@@ -160,12 +160,12 @@ struct property_entry {
bool is_string;
union {
union {
void *raw_data;
u8 *u8_data;
u16 *u16_data;
u32 *u32_data;
u64 *u64_data;
const char **str;
const void *raw_data;
const u8 *u8_data;
const u16 *u16_data;
const u32 *u32_data;
const u64 *u64_data;
const char * const *str;
} pointer;
union {
unsigned long long raw_data;
......@@ -241,8 +241,13 @@ struct property_entry {
.name = _name_, \
}
struct property_entry *
property_entries_dup(const struct property_entry *properties);
void property_entries_free(const struct property_entry *properties);
int device_add_properties(struct device *dev,
struct property_entry *properties);
const struct property_entry *properties);
void device_remove_properties(struct device *dev);
bool device_dma_supported(struct device *dev);
......
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