mirrors/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2025-11-04 10:40:15 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

device property: refactor built-in properties support

Browse source 
Instead of using the type and nval fields we will use length (in bytes) of the
value. The sanity check is done in the accessors.

The built-in property accessors are split in the same way such as device tree.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Andy Shevchenko 2015-11-30 17:11:31 +02:00 committed by Rafael J. Wysocki
parent 61f5e294b8
commit 318a197182
2 changed files with 109 additions and 41 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

142
drivers/base/property.c
View file

@ -63,45 +63,107 @@ static struct property_entry *pset_prop_get(struct property_set *pset,
return NULL;
}
static int pset_prop_read_array(struct property_set *pset, const char *name,
enum dev_prop_type type, void *val, size_t nval)
static void *pset_prop_find(struct property_set *pset, const char *propname,
size_t length)
{
struct property_entry *prop;
unsigned int item_size;
void *pointer;
prop = pset_prop_get(pset, name);
prop = pset_prop_get(pset, propname);
if (!prop)
return -ENODATA;
return ERR_PTR(-EINVAL);
pointer = prop->value.raw_data;
if (!pointer)
return ERR_PTR(-ENODATA);
if (length > prop->length)
return ERR_PTR(-EOVERFLOW);
return pointer;
}
if (prop->type != type)
return -EPROTO;
static int pset_prop_read_u8_array(struct property_set *pset,
const char *propname,
u8 *values, size_t nval)
{
void *pointer;
size_t length = nval * sizeof(*values);
if (!val)
return prop->nval;
pointer = pset_prop_find(pset, propname, length);
if (IS_ERR(pointer))
return PTR_ERR(pointer);
if (prop->nval < nval)
return -EOVERFLOW;
memcpy(values, pointer, length);
return 0;
}
switch (type) {
case DEV_PROP_U8:
item_size = sizeof(u8);
break;
case DEV_PROP_U16:
item_size = sizeof(u16);
break;
case DEV_PROP_U32:
item_size = sizeof(u32);
break;
case DEV_PROP_U64:
item_size = sizeof(u64);
break;
case DEV_PROP_STRING:
item_size = sizeof(const char *);
break;
default:
static int pset_prop_read_u16_array(struct property_set *pset,
const char *propname,
u16 *values, size_t nval)
{
void *pointer;
size_t length = nval * sizeof(*values);
pointer = pset_prop_find(pset, propname, length);
if (IS_ERR(pointer))
return PTR_ERR(pointer);
memcpy(values, pointer, length);
return 0;
}
static int pset_prop_read_u32_array(struct property_set *pset,
const char *propname,
u32 *values, size_t nval)
{
void *pointer;
size_t length = nval * sizeof(*values);
pointer = pset_prop_find(pset, propname, length);
if (IS_ERR(pointer))
return PTR_ERR(pointer);
memcpy(values, pointer, length);
return 0;
}
static int pset_prop_read_u64_array(struct property_set *pset,
const char *propname,
u64 *values, size_t nval)
{
void *pointer;
size_t length = nval * sizeof(*values);
pointer = pset_prop_find(pset, propname, length);
if (IS_ERR(pointer))
return PTR_ERR(pointer);
memcpy(values, pointer, length);
return 0;
}
static int pset_prop_count_elems_of_size(struct property_set *pset,
const char *propname, size_t length)
{
struct property_entry *prop;
prop = pset_prop_get(pset, propname);
if (!prop)
return -EINVAL;
}
memcpy(val, prop->value.raw_data, nval * item_size);
return prop->length / length;
}
static int pset_prop_read_string_array(struct property_set *pset,
const char *propname,
const char **strings, size_t nval)
{
void *pointer;
size_t length = nval * sizeof(*strings);
pointer = pset_prop_find(pset, propname, length);
if (IS_ERR(pointer))
return PTR_ERR(pointer);
memcpy(strings, pointer, length);
return 0;
}
@ -314,6 +376,10 @@ EXPORT_SYMBOL_GPL(device_property_match_string);
(val) ? of_property_read_##type##_array((node), (propname), (val), (nval)) \
: of_property_count_elems_of_size((node), (propname), sizeof(type))
#define PSET_PROP_READ_ARRAY(node, propname, type, val, nval) \
(val) ? pset_prop_read_##type##_array((node), (propname), (val), (nval)) \
: pset_prop_count_elems_of_size((node), (propname), sizeof(type))
#define FWNODE_PROP_READ_ARRAY(_fwnode_, _propname_, _type_, _proptype_, _val_, _nval_) \
({ \
int _ret_; \
@ -324,8 +390,8 @@ EXPORT_SYMBOL_GPL(device_property_match_string);
_ret_ = acpi_node_prop_read(_fwnode_, _propname_, _proptype_, \
_val_, _nval_); \
else if (is_pset_node(_fwnode_)) \
_ret_ = pset_prop_read_array(to_pset_node(_fwnode_), _propname_, \
_proptype_, _val_, _nval_); \
_ret_ = PSET_PROP_READ_ARRAY(to_pset_node(_fwnode_), _propname_, \
_type_, _val_, _nval_); \
else \
_ret_ = -ENXIO; \
_ret_; \
@ -466,8 +532,12 @@ int fwnode_property_read_string_array(struct fwnode_handle *fwnode,
return acpi_node_prop_read(fwnode, propname, DEV_PROP_STRING,
val, nval);
else if (is_pset_node(fwnode))
return pset_prop_read_array(to_pset_node(fwnode), propname,
DEV_PROP_STRING, val, nval);
return val ?
pset_prop_read_string_array(to_pset_node(fwnode),
propname, val, nval) :
pset_prop_count_elems_of_size(to_pset_node(fwnode),
propname,
sizeof(const char *));
return -ENXIO;
}
EXPORT_SYMBOL_GPL(fwnode_property_read_string_array);
@ -496,8 +566,8 @@ int fwnode_property_read_string(struct fwnode_handle *fwnode,
return acpi_node_prop_read(fwnode, propname, DEV_PROP_STRING,
val, 1);
else if (is_pset_node(fwnode))
return pset_prop_read_array(to_pset_node(fwnode), propname,
DEV_PROP_STRING, val, 1);
return pset_prop_read_string_array(to_pset_node(fwnode),
propname, val, 1);
return -ENXIO;
}
EXPORT_SYMBOL_GPL(fwnode_property_read_string);

8
include/linux/property.h
View file

@ -144,14 +144,12 @@ static inline int fwnode_property_read_u64(struct fwnode_handle *fwnode,
/**
* struct property_entry - "Built-in" device property representation.
* @name: Name of the property.
* @type: Type of the property.
* @nval: Number of items of type @type making up the value.
* @value: Value of the property (an array of @nval items of type @type).
* @length: Length of data making up the value.
* @value: Value of the property (an array of items of the given type).
*/
struct property_entry {
const char *name;
enum dev_prop_type type;
size_t nval;
size_t length;
union {
void *raw_data;
u8 *u8_data;