On Thursday, June 13, 2019 6:59:51 PM CEST Andy Shevchenko wrote:
> 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().
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> Acked-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
> Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
> ---
> include/linux/property.h | 44 ++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 44 insertions(+)
>
> diff --git a/include/linux/property.h b/include/linux/property.h
> index 088d4db7e949..dbacf17fff2e 100644
> --- a/include/linux/property.h
> +++ b/include/linux/property.h
> @@ -148,6 +148,26 @@ 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)
> {
> @@ -178,6 +198,30 @@ 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.
>
Applied, thanks!
