[PATCH] of: Add missing node iteration stubs for disabled CONFIG_OF
Jonathan Austin
jonathan.austin at arm.com
Tue Jun 11 12:22:55 EDT 2013
Hi Rob, Thomasz,
(dredging up an oldish thread as I just ran in to this issue)
On 01/04/13 22:19, Rob Herring wrote:
> On 03/09/2013 02:15 PM, Tomasz Figa wrote:
>> This patch moves several for_each macros out of the #ifdef CONFIG_OF
>> block and adds inline stubs for functions used by these macros, compiled
>> conditionally when CONFIG_OF is not enabled.
>>
>> This eliminates the need to explicitly check for CONFIG_OF in driver
>> code using mentioned functions and macros.
>
> Do you have some users of this?
I do!
Or at least I might.
I'm not certain as perhaps the fix to what I describe below is to add
dependencies on CONFIG_OF - it isn't clear to me either way:
With both psci and arch_timers (CONFIG_ARM_PSCI, CONFIG_ARM_ARCH_TIMER)
and without CONFIG_OF we get a build failure because we lack the definition
of of_find_matching_node():
eg:
arch/arm/kernel/psci.c:167:2: error: implicit declaration of function ‘of_find_matching_node’ [-Werror=implicit-function-declaration]
The same happens with arm_arch_timer.c (well, there's a patch required to
include linux/of.h first, after which Thomasz's patch is relevant).
So, I guess the question is whether we should expect PSCI and ARM_ARCH_TIMER
to depend on CONFIG_OF, or whether we'd like them to fail gracefully in the
case that we *don't* have CONFIG_OF. I think the current situation is broken
either way...
Thoughts?
Jonny
>
> Rob
>
>>
>> Signed-off-by: Tomasz Figa <tomasz.figa at gmail.com>
>> ---
>> include/linux/of.h | 92 +++++++++++++++++++++++++++++++++++++-----------------
>> 1 file changed, 63 insertions(+), 29 deletions(-)
>>
>> diff --git a/include/linux/of.h b/include/linux/of.h
>> index a0f1292..7a736b8 100644
>> --- a/include/linux/of.h
>> +++ b/include/linux/of.h
>> @@ -86,6 +86,31 @@ static inline struct device_node *of_node_get(struct device_node *node)
>> static inline void of_node_put(struct device_node *node) { }
>> #endif /* !CONFIG_OF_DYNAMIC */
>>
>> +#define for_each_node_by_name(dn, name) \
>> + for (dn = of_find_node_by_name(NULL, name); dn; \
>> + dn = of_find_node_by_name(dn, name))
>> +#define for_each_node_by_type(dn, type) \
>> + for (dn = of_find_node_by_type(NULL, type); dn; \
>> + dn = of_find_node_by_type(dn, type))
>> +#define for_each_compatible_node(dn, type, compatible) \
>> + for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
>> + dn = of_find_compatible_node(dn, type, compatible))
>> +#define for_each_matching_node(dn, matches) \
>> + for (dn = of_find_matching_node(NULL, matches); dn; \
>> + dn = of_find_matching_node(dn, matches))
>> +#define for_each_matching_node_and_match(dn, matches, match) \
>> + for (dn = of_find_matching_node_and_match(NULL, matches, match); \
>> + dn; dn = of_find_matching_node_and_match(dn, matches, match))
>> +#define for_each_child_of_node(parent, child) \
>> + for (child = of_get_next_child(parent, NULL); child != NULL; \
>> + child = of_get_next_child(parent, child))
>> +#define for_each_available_child_of_node(parent, child) \
>> + for (child = of_get_next_available_child(parent, NULL); child != NULL; \
>> + child = of_get_next_available_child(parent, child))
>> +#define for_each_node_with_property(dn, prop_name) \
>> + for (dn = of_find_node_with_property(NULL, prop_name); dn; \
>> + dn = of_find_node_with_property(dn, prop_name))
>> +
>> #ifdef CONFIG_OF
>>
>> /* Pointer for first entry in chain of all nodes. */
>> @@ -167,19 +192,10 @@ static inline const char *of_node_full_name(const struct device_node *np)
>>
>> extern struct device_node *of_find_node_by_name(struct device_node *from,
>> const char *name);
>> -#define for_each_node_by_name(dn, name) \
>> - for (dn = of_find_node_by_name(NULL, name); dn; \
>> - dn = of_find_node_by_name(dn, name))
>> extern struct device_node *of_find_node_by_type(struct device_node *from,
>> const char *type);
>> -#define for_each_node_by_type(dn, type) \
>> - for (dn = of_find_node_by_type(NULL, type); dn; \
>> - dn = of_find_node_by_type(dn, type))
>> extern struct device_node *of_find_compatible_node(struct device_node *from,
>> const char *type, const char *compat);
>> -#define for_each_compatible_node(dn, type, compatible) \
>> - for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
>> - dn = of_find_compatible_node(dn, type, compatible))
>> extern struct device_node *of_find_matching_node_and_match(
>> struct device_node *from,
>> const struct of_device_id *matches,
>> @@ -190,12 +206,6 @@ static inline struct device_node *of_find_matching_node(
>> {
>> return of_find_matching_node_and_match(from, matches, NULL);
>> }
>> -#define for_each_matching_node(dn, matches) \
>> - for (dn = of_find_matching_node(NULL, matches); dn; \
>> - dn = of_find_matching_node(dn, matches))
>> -#define for_each_matching_node_and_match(dn, matches, match) \
>> - for (dn = of_find_matching_node_and_match(NULL, matches, match); \
>> - dn; dn = of_find_matching_node_and_match(dn, matches, match))
>> extern struct device_node *of_find_node_by_path(const char *path);
>> extern struct device_node *of_find_node_by_phandle(phandle handle);
>> extern struct device_node *of_get_parent(const struct device_node *node);
>> @@ -207,14 +217,6 @@ extern struct device_node *of_get_next_available_child(
>>
>> extern struct device_node *of_get_child_by_name(const struct device_node *node,
>> const char *name);
>> -#define for_each_child_of_node(parent, child) \
>> - for (child = of_get_next_child(parent, NULL); child != NULL; \
>> - child = of_get_next_child(parent, child))
>> -
>> -#define for_each_available_child_of_node(parent, child) \
>> - for (child = of_get_next_available_child(parent, NULL); child != NULL; \
>> - child = of_get_next_available_child(parent, child))
>> -
>> static inline int of_get_child_count(const struct device_node *np)
>> {
>> struct device_node *child;
>> @@ -228,10 +230,6 @@ static inline int of_get_child_count(const struct device_node *np)
>>
>> extern struct device_node *of_find_node_with_property(
>> struct device_node *from, const char *prop_name);
>> -#define for_each_node_with_property(dn, prop_name) \
>> - for (dn = of_find_node_with_property(NULL, prop_name); dn; \
>> - dn = of_find_node_with_property(dn, prop_name))
>> -
>> extern struct property *of_find_property(const struct device_node *np,
>> const char *name,
>> int *lenp);
>> @@ -353,13 +351,28 @@ static inline struct device_node *of_find_node_by_name(struct device_node *from,
>> return NULL;
>> }
>>
>> +static inline struct device_node *of_find_node_by_type(struct device_node *from,
>> + const char *type)
>> +{
>> + return NULL;
>> +}
>> +
>> static inline bool of_have_populated_dt(void)
>> {
>> return false;
>> }
>>
>> -#define for_each_child_of_node(parent, child) \
>> - while (0)
>> +static inline struct device_node *of_get_next_child(const struct device_node *node,
>> + struct device_node *prev)
>> +{
>> + return NULL;
>> +}
>> +
>> +static inline struct device_node *of_get_next_available_child(
>> + const struct device_node *node, struct device_node *prev)
>> +{
>> + return NULL;
>> +}
>>
>> static inline struct device_node *of_get_child_by_name(
>> const struct device_node *node,
>> @@ -373,6 +386,12 @@ static inline int of_get_child_count(const struct device_node *np)
>> return 0;
>> }
>>
>> +static inline struct device_node *of_find_node_with_property(
>> + struct device_node *from, const char *prop_name)
>> +{
>> + return NULL;
>> +}
>> +
>> static inline int of_device_is_compatible(const struct device_node *device,
>> const char *name)
>> {
>> @@ -394,6 +413,21 @@ static inline struct device_node *of_find_compatible_node(
>> return NULL;
>> }
>>
>> +static inline struct device_node *of_find_matching_node_and_match(
>> + struct device_node *from,
>> + const struct of_device_id *matches,
>> + const struct of_device_id **match)
>> +{
>> + return NULL;
>> +}
>> +
>> +static inline struct device_node *of_find_matching_node(
>> + struct device_node *from,
>> + const struct of_device_id *matches)
>> +{
>> + return NULL;
>> +}
>> +
>> static inline int of_property_read_u8_array(const struct device_node *np,
>> const char *propname, u8 *out_values, size_t sz)
>> {
>>
>
>
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