On 10:31 Thu 15 Nov , Sascha Hauer wrote:
> devicetrees may have a linux,stdout-path property in the chosen
> node describing the console device. This adds a helper function
> to match a device against this property so a driver can call
> add_preferred_console for a matching device.
I like it but I've an issue with it I cannot specify the option for
as example I need to set the uart at 38400n8 or 115200n8 regarless of wath the
booloader did
Best Regards,
J.
>
> Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
> ---
> drivers/of/base.c | 28 ++++++++++++++++++++++++++++
> include/linux/of.h | 7 +++++++
> 2 files changed, 35 insertions(+)
>
> diff --git a/drivers/of/base.c b/drivers/of/base.c
> index af3b22a..737feb8 100644
> --- a/drivers/of/base.c
> +++ b/drivers/of/base.c
> @@ -1358,3 +1358,31 @@ const char *of_prop_next_string(struct property *prop, const char *cur)
> return curv;
> }
> EXPORT_SYMBOL_GPL(of_prop_next_string);
> +
> +/**
> + * of_device_is_stdout_path - check if a device node matches the
> + * linux,stdout-path property
> + *
> + * Check if this device node matches the linux,stdout-path property
> + * in the chosen node. return true if yes, false otherwise.
> + */
> +int of_device_is_stdout_path(struct device_node *dn)
> +{
> + const char *name;
> + struct device_node *dn_stdout;
> + int is_stdout = 0;
> +
> + name = of_get_property(of_chosen, "linux,stdout-path", NULL);
> + if (name == NULL)
> + return 0;
> +
> + dn_stdout = of_find_node_by_path(name);
> +
> + if (dn_stdout && dn_stdout == dn)
> + is_stdout = 1;
> +
> + of_node_put(dn_stdout);
> +
> + return is_stdout;
> +}
> +EXPORT_SYMBOL_GPL(of_device_is_stdout_path);
> diff --git a/include/linux/of.h b/include/linux/of.h
> index b4e50d5..5f857b5 100644
> --- a/include/linux/of.h
> +++ b/include/linux/of.h
> @@ -310,6 +310,8 @@ const char *of_prop_next_string(struct property *prop, const char *cur);
> s; \
> s = of_prop_next_string(prop, s))
>
> +int of_device_is_stdout_path(struct device_node *dn);
> +
> #else /* CONFIG_OF */
>
> static inline const char* of_node_full_name(struct device_node *np)
> @@ -437,6 +439,11 @@ static inline int of_machine_is_compatible(const char *compat)
> return 0;
> }
>
> +static inline int of_device_is_stdout_path(struct device_node *dn)
> +{
> + return 0;
> +}
> +
> #define of_match_ptr(_ptr) NULL
> #define of_match_node(_matches, _node) NULL
> #define of_property_for_each_u32(np, propname, prop, p, u) \
> --
> 1.7.10.4
>
> _______________________________________________
> devicetree-discuss mailing list
> devicetree-discuss@xxxxxxxxxxxxxxxx
> https://lists.ozlabs.org/listinfo/devicetree-discuss
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