This function looks up a PM domain form the provider. This will be
useful to add parent/child domain relationship from the SoC specific
code. The caller of the function must make sure that PM domain provider
is already registered.
Signed-off-by: Amit Daniel Kachhap <[email protected]>
---
This patch may solve the same purpose which is done by earlier posts
1) https://lkml.org/lkml/2014/11/24/319 - In this there were comments
for not using the PM domain name.
2) Ulf Hansson posted a patch
http://www.spinics.net/lists/linux-samsung-soc/msg39745.html which also solves
similar purpose but I feel this is slightly complex and involves changing
the genpd structure.
drivers/base/power/domain.c | 3 ++-
include/linux/pm_domain.h | 8 ++++++++
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index d822753..5d7a2c1 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -2129,7 +2129,7 @@ EXPORT_SYMBOL_GPL(of_genpd_del_provider);
* Returns a valid pointer to struct generic_pm_domain on success or ERR_PTR()
* on failure.
*/
-static struct generic_pm_domain *of_genpd_get_from_provider(
+struct generic_pm_domain *of_genpd_get_from_provider(
struct of_phandle_args *genpdspec)
{
struct generic_pm_domain *genpd = ERR_PTR(-ENOENT);
@@ -2149,6 +2149,7 @@ static struct generic_pm_domain *of_genpd_get_from_provider(
return genpd;
}
+EXPORT_SYMBOL_GPL(of_genpd_get_from_provider);
/**
* genpd_dev_pm_detach - Detach a device from its PM domain.
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index 9690827..4954e24 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -282,6 +282,8 @@ typedef struct generic_pm_domain *(*genpd_xlate_t)(struct of_phandle_args *args,
int __of_genpd_add_provider(struct device_node *np, genpd_xlate_t xlate,
void *data);
void of_genpd_del_provider(struct device_node *np);
+struct generic_pm_domain *of_genpd_get_from_provider(
+ struct of_phandle_args *genpdspec);
struct generic_pm_domain *__of_genpd_xlate_simple(
struct of_phandle_args *genpdspec,
@@ -299,6 +301,12 @@ static inline int __of_genpd_add_provider(struct device_node *np,
}
static inline void of_genpd_del_provider(struct device_node *np) {}
+static inline struct generic_pm_domain *of_genpd_get_from_provider(
+ struct of_phandle_args *genpdspec)
+{
+ return NULL;
+}
+
#define __of_genpd_xlate_simple NULL
#define __of_genpd_xlate_onecell NULL
--
1.7.9.5
On 1 December 2014 at 12:41, Amit Daniel Kachhap
<[email protected]> wrote:
> This function looks up a PM domain form the provider. This will be
> useful to add parent/child domain relationship from the SoC specific
> code. The caller of the function must make sure that PM domain provider
> is already registered.
>
> Signed-off-by: Amit Daniel Kachhap <[email protected]>
> ---
> This patch may solve the same purpose which is done by earlier posts
> 1) https://lkml.org/lkml/2014/11/24/319 - In this there were comments
> for not using the PM domain name.
>
> 2) Ulf Hansson posted a patch
> http://www.spinics.net/lists/linux-samsung-soc/msg39745.html which also solves
> similar purpose but I feel this is slightly complex and involves changing
> the genpd structure.
>
>
> drivers/base/power/domain.c | 3 ++-
> include/linux/pm_domain.h | 8 ++++++++
> 2 files changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
> index d822753..5d7a2c1 100644
> --- a/drivers/base/power/domain.c
> +++ b/drivers/base/power/domain.c
> @@ -2129,7 +2129,7 @@ EXPORT_SYMBOL_GPL(of_genpd_del_provider);
> * Returns a valid pointer to struct generic_pm_domain on success or ERR_PTR()
> * on failure.
> */
> -static struct generic_pm_domain *of_genpd_get_from_provider(
> +struct generic_pm_domain *of_genpd_get_from_provider(
> struct of_phandle_args *genpdspec)
> {
> struct generic_pm_domain *genpd = ERR_PTR(-ENOENT);
> @@ -2149,6 +2149,7 @@ static struct generic_pm_domain *of_genpd_get_from_provider(
>
> return genpd;
> }
> +EXPORT_SYMBOL_GPL(of_genpd_get_from_provider);
>
> /**
> * genpd_dev_pm_detach - Detach a device from its PM domain.
> diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
> index 9690827..4954e24 100644
> --- a/include/linux/pm_domain.h
> +++ b/include/linux/pm_domain.h
> @@ -282,6 +282,8 @@ typedef struct generic_pm_domain *(*genpd_xlate_t)(struct of_phandle_args *args,
> int __of_genpd_add_provider(struct device_node *np, genpd_xlate_t xlate,
> void *data);
> void of_genpd_del_provider(struct device_node *np);
> +struct generic_pm_domain *of_genpd_get_from_provider(
> + struct of_phandle_args *genpdspec);
>
> struct generic_pm_domain *__of_genpd_xlate_simple(
> struct of_phandle_args *genpdspec,
> @@ -299,6 +301,12 @@ static inline int __of_genpd_add_provider(struct device_node *np,
> }
> static inline void of_genpd_del_provider(struct device_node *np) {}
>
> +static inline struct generic_pm_domain *of_genpd_get_from_provider(
> + struct of_phandle_args *genpdspec)
> +{
> + return NULL;
> +}
> +
> #define __of_genpd_xlate_simple NULL
> #define __of_genpd_xlate_onecell NULL
>
> --
> 1.7.9.5
>
This seems like a good approach!
Reviewed-by: Ulf Hansson <[email protected]>
Do, note that you will have to resend the patch to linux-pm list as
well. Unless Rafael is happy to pick it up from here.
Kind regards
Uffe
On Thu, Dec 4, 2014 at 9:09 PM, Ulf Hansson <[email protected]> wrote:
> On 1 December 2014 at 12:41, Amit Daniel Kachhap
> <[email protected]> wrote:
>> This function looks up a PM domain form the provider. This will be
>> useful to add parent/child domain relationship from the SoC specific
>> code. The caller of the function must make sure that PM domain provider
>> is already registered.
>>
>> Signed-off-by: Amit Daniel Kachhap <[email protected]>
>> ---
>> This patch may solve the same purpose which is done by earlier posts
>> 1) https://lkml.org/lkml/2014/11/24/319 - In this there were comments
>> for not using the PM domain name.
>>
>> 2) Ulf Hansson posted a patch
>> http://www.spinics.net/lists/linux-samsung-soc/msg39745.html which also solves
>> similar purpose but I feel this is slightly complex and involves changing
>> the genpd structure.
>>
>>
>> drivers/base/power/domain.c | 3 ++-
>> include/linux/pm_domain.h | 8 ++++++++
>> 2 files changed, 10 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
>> index d822753..5d7a2c1 100644
>> --- a/drivers/base/power/domain.c
>> +++ b/drivers/base/power/domain.c
>> @@ -2129,7 +2129,7 @@ EXPORT_SYMBOL_GPL(of_genpd_del_provider);
>> * Returns a valid pointer to struct generic_pm_domain on success or ERR_PTR()
>> * on failure.
>> */
>> -static struct generic_pm_domain *of_genpd_get_from_provider(
>> +struct generic_pm_domain *of_genpd_get_from_provider(
>> struct of_phandle_args *genpdspec)
>> {
>> struct generic_pm_domain *genpd = ERR_PTR(-ENOENT);
>> @@ -2149,6 +2149,7 @@ static struct generic_pm_domain *of_genpd_get_from_provider(
>>
>> return genpd;
>> }
>> +EXPORT_SYMBOL_GPL(of_genpd_get_from_provider);
>>
>> /**
>> * genpd_dev_pm_detach - Detach a device from its PM domain.
>> diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
>> index 9690827..4954e24 100644
>> --- a/include/linux/pm_domain.h
>> +++ b/include/linux/pm_domain.h
>> @@ -282,6 +282,8 @@ typedef struct generic_pm_domain *(*genpd_xlate_t)(struct of_phandle_args *args,
>> int __of_genpd_add_provider(struct device_node *np, genpd_xlate_t xlate,
>> void *data);
>> void of_genpd_del_provider(struct device_node *np);
>> +struct generic_pm_domain *of_genpd_get_from_provider(
>> + struct of_phandle_args *genpdspec);
>>
>> struct generic_pm_domain *__of_genpd_xlate_simple(
>> struct of_phandle_args *genpdspec,
>> @@ -299,6 +301,12 @@ static inline int __of_genpd_add_provider(struct device_node *np,
>> }
>> static inline void of_genpd_del_provider(struct device_node *np) {}
>>
>> +static inline struct generic_pm_domain *of_genpd_get_from_provider(
>> + struct of_phandle_args *genpdspec)
>> +{
>> + return NULL;
>> +}
>> +
>> #define __of_genpd_xlate_simple NULL
>> #define __of_genpd_xlate_onecell NULL
>>
>> --
>> 1.7.9.5
>>
>
> This seems like a good approach!
>
> Reviewed-by: Ulf Hansson <[email protected]>
Thanks.
>
> Do, note that you will have to resend the patch to linux-pm list as
> well. Unless Rafael is happy to pick it up from here.
Sure. My fault.
Regards,
Amit
>
> Kind regards
> Uffe
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