| Message ID | 20240808095931.2649657-2-wenst@chromium.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | platform/chrome: Introduce DT hardware prober | expand |
On Thu, Aug 08, 2024 at 05:59:24PM +0800, Chen-Yu Tsai wrote: > Add a helper function to add string property updates to an OF changeset. > This is similar to of_changeset_add_prop_string(), but instead of adding > the property (and failing if it exists), it will update the property. > > This shall be used later in the DT hardware prober. ... > +int of_changeset_update_prop_string(struct of_changeset *ocs, > + struct device_node *np, > + const char *prop_name, const char *str) > +{ > + struct property prop; > + > + prop.name = (char *)prop_name; > + prop.length = strlen(str) + 1; > + prop.value = (void *)str; Is it the existing style in the file? Otherwise I often see style like this struct property prop = { .name = (char *)prop_name; .length = strlen(str) + 1; .value = (void *)str; }; in the kernel (IRQ domain, platform core, ...). > + return of_changeset_update_prop_helper(ocs, np, &prop); > +}
On Tue, Aug 13, 2024 at 02:11:30PM +0300, Andy Shevchenko wrote: > On Thu, Aug 08, 2024 at 05:59:24PM +0800, Chen-Yu Tsai wrote: > > Add a helper function to add string property updates to an OF changeset. > > This is similar to of_changeset_add_prop_string(), but instead of adding > > the property (and failing if it exists), it will update the property. > > > > This shall be used later in the DT hardware prober. > > ... > > > +int of_changeset_update_prop_string(struct of_changeset *ocs, > > + struct device_node *np, > > + const char *prop_name, const char *str) > > +{ > > + struct property prop; > > + > > + prop.name = (char *)prop_name; > > + prop.length = strlen(str) + 1; > > + prop.value = (void *)str; > > Is it the existing style in the file? Otherwise I often see style like this > > struct property prop = { > .name = (char *)prop_name; > .length = strlen(str) + 1; > .value = (void *)str; > }; > > in the kernel (IRQ domain, platform core, ...). Okay with me to use this style regardless of existing style. Rob
On Wed, Aug 14, 2024 at 3:18 AM Rob Herring <robh@kernel.org> wrote: > > On Tue, Aug 13, 2024 at 02:11:30PM +0300, Andy Shevchenko wrote: > > On Thu, Aug 08, 2024 at 05:59:24PM +0800, Chen-Yu Tsai wrote: > > > Add a helper function to add string property updates to an OF changeset. > > > This is similar to of_changeset_add_prop_string(), but instead of adding > > > the property (and failing if it exists), it will update the property. > > > > > > This shall be used later in the DT hardware prober. > > > > ... > > > > > +int of_changeset_update_prop_string(struct of_changeset *ocs, > > > + struct device_node *np, > > > + const char *prop_name, const char *str) > > > +{ > > > + struct property prop; > > > + > > > + prop.name = (char *)prop_name; > > > + prop.length = strlen(str) + 1; > > > + prop.value = (void *)str; > > > > Is it the existing style in the file? Otherwise I often see style like this Yeah. This was mostly copy pasted. > > > > struct property prop = { > > .name = (char *)prop_name; > > .length = strlen(str) + 1; > > .value = (void *)str; > > }; > > > > in the kernel (IRQ domain, platform core, ...). > > Okay with me to use this style regardless of existing style. Ack. I'll update it to the more modern style. ChenYu
diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c index 110104a936d9..dfd1358d59d5 100644 --- a/drivers/of/dynamic.c +++ b/drivers/of/dynamic.c @@ -1072,3 +1072,47 @@ int of_changeset_add_prop_bool(struct of_changeset *ocs, struct device_node *np, return of_changeset_add_prop_helper(ocs, np, &prop); } EXPORT_SYMBOL_GPL(of_changeset_add_prop_bool); + +static int of_changeset_update_prop_helper(struct of_changeset *ocs, + struct device_node *np, + const struct property *pp) +{ + struct property *new_pp; + int ret; + + new_pp = __of_prop_dup(pp, GFP_KERNEL); + if (!new_pp) + return -ENOMEM; + + ret = of_changeset_update_property(ocs, np, new_pp); + if (ret) + __of_prop_free(new_pp); + + return ret; +} + +/** + * of_changeset_update_prop_string - Add a string property update to a changeset + * + * @ocs: changeset pointer + * @np: device node pointer + * @prop_name: name of the property to be updated + * @str: pointer to null terminated string + * + * Create a string property to be updated and add it to a changeset. + * + * Return: 0 on success, a negative error value in case of an error. + */ +int of_changeset_update_prop_string(struct of_changeset *ocs, + struct device_node *np, + const char *prop_name, const char *str) +{ + struct property prop; + + prop.name = (char *)prop_name; + prop.length = strlen(str) + 1; + prop.value = (void *)str; + + return of_changeset_update_prop_helper(ocs, np, &prop); +} +EXPORT_SYMBOL_GPL(of_changeset_update_prop_string); diff --git a/include/linux/of.h b/include/linux/of.h index 85b60ac9eec5..046283be1cd3 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -1651,6 +1651,10 @@ static inline int of_changeset_add_prop_u32(struct of_changeset *ocs, return of_changeset_add_prop_u32_array(ocs, np, prop_name, &val, 1); } +int of_changeset_update_prop_string(struct of_changeset *ocs, + struct device_node *np, + const char *prop_name, const char *str); + int of_changeset_add_prop_bool(struct of_changeset *ocs, struct device_node *np, const char *prop_name);
Add a helper function to add string property updates to an OF changeset. This is similar to of_changeset_add_prop_string(), but instead of adding the property (and failing if it exists), it will update the property. This shall be used later in the DT hardware prober. Signed-off-by: Chen-Yu Tsai <wenst@chromium.org> --- Changes since v3: - Use new __of_prop_free() helper - Add new line before header declaration Changes since v2: - New patch added in v3 --- drivers/of/dynamic.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ include/linux/of.h | 4 ++++ 2 files changed, 48 insertions(+)