| Message ID | 1494424994-26232-2-git-send-email-olekstysh@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
>>> On 10.05.17 at 16:03, <olekstysh@gmail.com> wrote: > From: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> > > Port Linux helper of_count_phandle_with_args for counting > number of phandles in a property. > > Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> > Reviewed-by: Julien Grall <julien.grall@arm.com> > > --- > Changes in v1: > - Add Julien's reviewed-by > --- > xen/common/device_tree.c | 7 +++++++ > xen/include/xen/device_tree.h | 19 +++++++++++++++++++ > 2 files changed, 26 insertions(+) I'm sure I did point this out to you before: With this diffstat, I don't see why I've been copied on this patch. Likely the same for a few more in this series. Jan
Hi, Jan, all. On Wed, May 10, 2017 at 5:50 PM, Jan Beulich <JBeulich@suse.com> wrote: >>>> On 10.05.17 at 16:03, <olekstysh@gmail.com> wrote: >> From: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> >> >> Port Linux helper of_count_phandle_with_args for counting >> number of phandles in a property. >> >> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> >> Reviewed-by: Julien Grall <julien.grall@arm.com> >> >> --- >> Changes in v1: >> - Add Julien's reviewed-by >> --- >> xen/common/device_tree.c | 7 +++++++ >> xen/include/xen/device_tree.h | 19 +++++++++++++++++++ >> 2 files changed, 26 insertions(+) > > I'm sure I did point this out to you before: With this diffstat, I don't > see why I've been copied on this patch. Likely the same for a few > more in this series. My apologies for that to everybody who I have mistakenly CCed. > > Jan >
diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c index 7b009ea..60b0095 100644 --- a/xen/common/device_tree.c +++ b/xen/common/device_tree.c @@ -1663,6 +1663,13 @@ int dt_parse_phandle_with_args(const struct dt_device_node *np, index, out_args); } +int dt_count_phandle_with_args(const struct dt_device_node *np, + const char *list_name, + const char *cells_name) +{ + return __dt_parse_phandle_with_args(np, list_name, cells_name, 0, -1, NULL); +} + /** * unflatten_dt_node - Alloc and populate a device_node from the flat tree * @fdt: The parent device tree blob diff --git a/xen/include/xen/device_tree.h b/xen/include/xen/device_tree.h index 0aecbe0..738f1b6 100644 --- a/xen/include/xen/device_tree.h +++ b/xen/include/xen/device_tree.h @@ -764,6 +764,25 @@ int dt_parse_phandle_with_args(const struct dt_device_node *np, const char *cells_name, int index, struct dt_phandle_args *out_args); +/** + * dt_count_phandle_with_args() - Find the number of phandles references in a property + * @np: pointer to a device tree node containing a list + * @list_name: property name that contains a list + * @cells_name: property name that specifies phandles' arguments count + * + * Returns the number of phandle + argument tuples within a property. It + * is a typical pattern to encode a list of phandle and variable + * arguments into a single property. The number of arguments is encoded + * by a property in the phandle-target node. For example, a gpios + * property would contain a list of GPIO specifies consisting of a + * phandle and 1 or more arguments. The number of arguments are + * determined by the #gpio-cells property in the node pointed to by the + * phandle. + */ +int dt_count_phandle_with_args(const struct dt_device_node *np, + const char *list_name, + const char *cells_name); + #ifdef CONFIG_DEVICE_TREE_DEBUG #define dt_dprintk(fmt, args...) \ printk(XENLOG_DEBUG fmt, ## args)