Hi Andy, On Mon, May 20, 2019 at 03:38:48PM +0300, Andy Shevchenko wrote: > The usual pattern to allocate the necessary space for an array of properties > is > to count them fist using:
s/fist/first/ With that, Acked-by: Sakari Ailus <[email protected]> > > count = device_property_read_uXX_array(dev, propname, NULL, 0); > > Introduce helpers device_property_count_uXX() to count items by supplying hard > coded last two parameters to device_property_readXX_array(). > > Signed-off-by: Andy Shevchenko <[email protected]> > --- > include/linux/property.h | 44 ++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 44 insertions(+) > > diff --git a/include/linux/property.h b/include/linux/property.h > index a29369c89e6e..65e31c090f9f 100644 > --- a/include/linux/property.h > +++ b/include/linux/property.h > @@ -144,6 +144,26 @@ static inline int device_property_read_u64(struct device > *dev, > 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, > const char *propname) > { > @@ -174,6 +194,30 @@ static inline int fwnode_property_read_u64(const struct > fwnode_handle *fwnode, > 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. > * @name: Name of the property. > -- > 2.20.1 > -- Sakari Ailus [email protected]
