| Message ID | 0df414d5496574269c58415f7bff8f069efce94d.1610115608.git.rahul.singh@arm.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | xen/arm: Add support for SMMUv3 driver | expand |
On Fri, 8 Jan 2021, Rahul Singh wrote: > Import the Linux helper of_property_match_string. This function searches > a string list property and returns the index of a specific string value. > > Signed-off-by: Rahul Singh <rahul.singh@arm.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> > --- > Changes in V3: > - This patch is introduce in this verison. > Changes in V4: Rebase > --- > xen/common/device_tree.c | 27 +++++++++++++++++++++++++++ > xen/include/xen/device_tree.h | 12 ++++++++++++ > 2 files changed, 39 insertions(+) > > diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c > index e107c6f89f..18825e333e 100644 > --- a/xen/common/device_tree.c > +++ b/xen/common/device_tree.c > @@ -208,6 +208,33 @@ int dt_property_read_string(const struct dt_device_node *np, > return 0; > } > > +int dt_property_match_string(const struct dt_device_node *np, > + const char *propname, const char *string) > +{ > + const struct dt_property *dtprop = dt_find_property(np, propname, NULL); > + size_t l; > + int i; > + const char *p, *end; > + > + if ( !dtprop ) > + return -EINVAL; > + if ( !dtprop->value ) > + return -ENODATA; > + > + p = dtprop->value; > + end = p + dtprop->length; > + > + for ( i = 0; p < end; i++, p += l ) > + { > + l = strnlen(p, end - p) + 1; > + if ( p + l > end ) > + return -EILSEQ; > + if ( strcmp(string, p) == 0 ) > + return i; /* Found it; return index */ > + } > + return -ENODATA; > +} > + > bool_t dt_device_is_compatible(const struct dt_device_node *device, > const char *compat) > { > diff --git a/xen/include/xen/device_tree.h b/xen/include/xen/device_tree.h > index f2ad22b79c..b02696be94 100644 > --- a/xen/include/xen/device_tree.h > +++ b/xen/include/xen/device_tree.h > @@ -400,6 +400,18 @@ static inline bool_t dt_property_read_bool(const struct dt_device_node *np, > int dt_property_read_string(const struct dt_device_node *np, > const char *propname, const char **out_string); > > +/** > + * dt_property_match_string() - Find string in a list and return index > + * @np: pointer to node containing string list property > + * @propname: string list property name > + * @string: pointer to string to search for in string list > + * > + * This function searches a string list property and returns the index > + * of a specific string value. > + */ > +int dt_property_match_string(const struct dt_device_node *np, > + const char *propname, const char *string); > + > /** > * Checks if the given "compat" string matches one of the strings in > * the device's "compatible" property > -- > 2.17.1 >
Hi, > On 8 Jan 2021, at 14:46, Rahul Singh <Rahul.Singh@arm.com> wrote: > > Import the Linux helper of_property_match_string. This function searches > a string list property and returns the index of a specific string value. > > Signed-off-by: Rahul Singh <rahul.singh@arm.com> Reviewed-by: Bertrand Marquis <bertrand.marquis@arm.com> Cheers Bertrand > --- > Changes in V3: > - This patch is introduce in this verison. > Changes in V4: Rebase > --- > xen/common/device_tree.c | 27 +++++++++++++++++++++++++++ > xen/include/xen/device_tree.h | 12 ++++++++++++ > 2 files changed, 39 insertions(+) > > diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c > index e107c6f89f..18825e333e 100644 > --- a/xen/common/device_tree.c > +++ b/xen/common/device_tree.c > @@ -208,6 +208,33 @@ int dt_property_read_string(const struct dt_device_node *np, > return 0; > } > > +int dt_property_match_string(const struct dt_device_node *np, > + const char *propname, const char *string) > +{ > + const struct dt_property *dtprop = dt_find_property(np, propname, NULL); > + size_t l; > + int i; > + const char *p, *end; > + > + if ( !dtprop ) > + return -EINVAL; > + if ( !dtprop->value ) > + return -ENODATA; > + > + p = dtprop->value; > + end = p + dtprop->length; > + > + for ( i = 0; p < end; i++, p += l ) > + { > + l = strnlen(p, end - p) + 1; > + if ( p + l > end ) > + return -EILSEQ; > + if ( strcmp(string, p) == 0 ) > + return i; /* Found it; return index */ > + } > + return -ENODATA; > +} > + > bool_t dt_device_is_compatible(const struct dt_device_node *device, > const char *compat) > { > diff --git a/xen/include/xen/device_tree.h b/xen/include/xen/device_tree.h > index f2ad22b79c..b02696be94 100644 > --- a/xen/include/xen/device_tree.h > +++ b/xen/include/xen/device_tree.h > @@ -400,6 +400,18 @@ static inline bool_t dt_property_read_bool(const struct dt_device_node *np, > int dt_property_read_string(const struct dt_device_node *np, > const char *propname, const char **out_string); > > +/** > + * dt_property_match_string() - Find string in a list and return index > + * @np: pointer to node containing string list property > + * @propname: string list property name > + * @string: pointer to string to search for in string list > + * > + * This function searches a string list property and returns the index > + * of a specific string value. > + */ > +int dt_property_match_string(const struct dt_device_node *np, > + const char *propname, const char *string); > + > /** > * Checks if the given "compat" string matches one of the strings in > * the device's "compatible" property > -- > 2.17.1 >
diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c index e107c6f89f..18825e333e 100644 --- a/xen/common/device_tree.c +++ b/xen/common/device_tree.c @@ -208,6 +208,33 @@ int dt_property_read_string(const struct dt_device_node *np, return 0; } +int dt_property_match_string(const struct dt_device_node *np, + const char *propname, const char *string) +{ + const struct dt_property *dtprop = dt_find_property(np, propname, NULL); + size_t l; + int i; + const char *p, *end; + + if ( !dtprop ) + return -EINVAL; + if ( !dtprop->value ) + return -ENODATA; + + p = dtprop->value; + end = p + dtprop->length; + + for ( i = 0; p < end; i++, p += l ) + { + l = strnlen(p, end - p) + 1; + if ( p + l > end ) + return -EILSEQ; + if ( strcmp(string, p) == 0 ) + return i; /* Found it; return index */ + } + return -ENODATA; +} + bool_t dt_device_is_compatible(const struct dt_device_node *device, const char *compat) { diff --git a/xen/include/xen/device_tree.h b/xen/include/xen/device_tree.h index f2ad22b79c..b02696be94 100644 --- a/xen/include/xen/device_tree.h +++ b/xen/include/xen/device_tree.h @@ -400,6 +400,18 @@ static inline bool_t dt_property_read_bool(const struct dt_device_node *np, int dt_property_read_string(const struct dt_device_node *np, const char *propname, const char **out_string); +/** + * dt_property_match_string() - Find string in a list and return index + * @np: pointer to node containing string list property + * @propname: string list property name + * @string: pointer to string to search for in string list + * + * This function searches a string list property and returns the index + * of a specific string value. + */ +int dt_property_match_string(const struct dt_device_node *np, + const char *propname, const char *string); + /** * Checks if the given "compat" string matches one of the strings in * the device's "compatible" property
Import the Linux helper of_property_match_string. This function searches a string list property and returns the index of a specific string value. Signed-off-by: Rahul Singh <rahul.singh@arm.com> --- Changes in V3: - This patch is introduce in this verison. Changes in V4: Rebase --- xen/common/device_tree.c | 27 +++++++++++++++++++++++++++ xen/include/xen/device_tree.h | 12 ++++++++++++ 2 files changed, 39 insertions(+)