Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

UPSTREAM: device property: Add helpers to count items in an array

Browse source 
The usual pattern to allocate the necessary space for an array of properties is
to count them first by calling:

  count = device_property_read_uXX_array(dev, propname, NULL, 0);
  if (count < 0)
	return count;

Introduce helpers device_property_count_uXX() to count items by supplying hard
coded last two parameters to device_property_readXX_array().

Bug: 150877929
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Will McVicker <willmcvicker@google.com>
Change-Id: If7cdedae76d0543997b96b3da3d28f6657472d29
(cherry picked from commit 33ee09cd59ce154b64f9df942dfa5456db90d5f9)
This commit is contained in:
Andy Shevchenko 2019-06-13 19:59:51 +03:00 committed by Will McVicker
parent 55c129b8cd
commit b0e413dd16
1 changed files with 44 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

44
include/linux/property.h
View file

@ -143,6 +143,26 @@ static inline int device_property_read_u64(struct device *dev,
return device_property_read_u64_array(dev, propname, val, 1); return device_property_read_u64_array(dev, propname, val, 1);
} }
static inline int device_property_count_u8(struct device *dev, const char *propname)
{
return device_property_read_u8_array(dev, propname, NULL, 0);
}
static inline int device_property_count_u16(struct device *dev, const char *propname)
{
return device_property_read_u16_array(dev, propname, NULL, 0);
}
static inline int device_property_count_u32(struct device *dev, const char *propname)
{
return device_property_read_u32_array(dev, propname, NULL, 0);
}
static inline int device_property_count_u64(struct device *dev, const char *propname)
{
return device_property_read_u64_array(dev, propname, NULL, 0);
}
static inline bool fwnode_property_read_bool(const struct fwnode_handle *fwnode, static inline bool fwnode_property_read_bool(const struct fwnode_handle *fwnode,
const char *propname) const char *propname)
{ {
@ -173,6 +193,30 @@ static inline int fwnode_property_read_u64(const struct fwnode_handle *fwnode,
return fwnode_property_read_u64_array(fwnode, propname, val, 1); return fwnode_property_read_u64_array(fwnode, propname, val, 1);
} }
static inline int fwnode_property_count_u8(const struct fwnode_handle *fwnode,
const char *propname)
{
return fwnode_property_read_u8_array(fwnode, propname, NULL, 0);
}
static inline int fwnode_property_count_u16(const struct fwnode_handle *fwnode,
const char *propname)
{
return fwnode_property_read_u16_array(fwnode, propname, NULL, 0);
}
static inline int fwnode_property_count_u32(const struct fwnode_handle *fwnode,
const char *propname)
{
return fwnode_property_read_u32_array(fwnode, propname, NULL, 0);
}
static inline int fwnode_property_count_u64(const struct fwnode_handle *fwnode,
const char *propname)
{
return fwnode_property_read_u64_array(fwnode, propname, NULL, 0);
}
/** /**
* struct property_entry - "Built-in" device property representation. * struct property_entry - "Built-in" device property representation.
* @name: Name of the property. * @name: Name of the property.