| Message ID | 20191220002430.11995-2-cw00.choi@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2,01/11] PM / devfreq: Add devfreq_get_devfreq_by_node function | expand |
Hi Chanwoo, On 12/20/19 12:24 AM, Chanwoo Choi wrote: > From: Leonard Crestez <leonard.crestez@nxp.com> > > Split off part of devfreq_get_devfreq_by_phandle into a separate > function. This allows callers to fetch devfreq instances by enumerating > devicetree instead of explicit phandles. > > [lkp: Reported the build error] > Reported-by: kbuild test robot <lkp@intel.com> > Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> > [cw00.choi: Export devfreq_get_devfreq_by_node function and > add function to devfreq.h when CONFIG_PM_DEVFREQ is enabled.] > Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> > --- > drivers/devfreq/devfreq.c | 46 +++++++++++++++++++++++++++++---------- > include/linux/devfreq.h | 6 +++++ > 2 files changed, 41 insertions(+), 11 deletions(-) > > diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c > index 89260b17598f..cb8ca81c8973 100644 > --- a/drivers/devfreq/devfreq.c > +++ b/drivers/devfreq/devfreq.c > @@ -966,6 +966,32 @@ struct devfreq *devm_devfreq_add_device(struct device *dev, > EXPORT_SYMBOL(devm_devfreq_add_device); > > #ifdef CONFIG_OF > +/* > + * devfreq_get_devfreq_by_node - Get the devfreq device from devicetree > + * @node - pointer to device_node > + * > + * return the instance of devfreq device > + */ > +struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node) > +{ > + struct devfreq *devfreq; > + > + if (!node) > + return ERR_PTR(-EINVAL); > + > + mutex_lock(&devfreq_list_lock); > + list_for_each_entry(devfreq, &devfreq_list, node) { > + if (devfreq->dev.parent > + && devfreq->dev.parent->of_node == node) { > + mutex_unlock(&devfreq_list_lock); > + return devfreq; > + } > + } > + mutex_unlock(&devfreq_list_lock); > + > + return ERR_PTR(-ENODEV); > +} > + > /* > * devfreq_get_devfreq_by_phandle - Get the devfreq device from devicetree > * @dev - instance to the given device > @@ -988,26 +1014,24 @@ struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, int index) > if (!node) > return ERR_PTR(-ENODEV); > > - mutex_lock(&devfreq_list_lock); > - list_for_each_entry(devfreq, &devfreq_list, node) { > - if (devfreq->dev.parent > - && devfreq->dev.parent->of_node == node) { > - mutex_unlock(&devfreq_list_lock); > - of_node_put(node); > - return devfreq; > - } > - } > - mutex_unlock(&devfreq_list_lock); > + devfreq = devfreq_get_devfreq_by_node(node); > of_node_put(node); > > - return ERR_PTR(-EPROBE_DEFER); > + return devfreq; > } > + > #else > +struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node) > +{ > + return ERR_PTR(-ENODEV); > +} > + > struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, int index) > { > return ERR_PTR(-ENODEV); > } > #endif /* CONFIG_OF */ > +EXPORT_SYMBOL_GPL(devfreq_get_devfreq_by_node); > EXPORT_SYMBOL_GPL(devfreq_get_devfreq_by_phandle); > > /** > diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h > index c6f82d4bec9f..1dccc47acbce 100644 > --- a/include/linux/devfreq.h > +++ b/include/linux/devfreq.h > @@ -253,6 +253,7 @@ extern void devm_devfreq_unregister_notifier(struct device *dev, > struct devfreq *devfreq, > struct notifier_block *nb, > unsigned int list); > +extern struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node); It can go without 'extern' in the header. > extern struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, > int index); > > @@ -407,6 +408,11 @@ static inline void devm_devfreq_unregister_notifier(struct device *dev, > { > } > > +static inline struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node) > +{ > + return ERR_PTR(-ENODEV); > +} > + > static inline struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, > int index) > { > Apart from this minor thing, looks good to me. When you fix it, feel free to add Reviewed-by: Lukasz Luba <lukasz.luba@arm.com> Regards, Lukasz
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 89260b17598f..cb8ca81c8973 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -966,6 +966,32 @@ struct devfreq *devm_devfreq_add_device(struct device *dev, EXPORT_SYMBOL(devm_devfreq_add_device); #ifdef CONFIG_OF +/* + * devfreq_get_devfreq_by_node - Get the devfreq device from devicetree + * @node - pointer to device_node + * + * return the instance of devfreq device + */ +struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node) +{ + struct devfreq *devfreq; + + if (!node) + return ERR_PTR(-EINVAL); + + mutex_lock(&devfreq_list_lock); + list_for_each_entry(devfreq, &devfreq_list, node) { + if (devfreq->dev.parent + && devfreq->dev.parent->of_node == node) { + mutex_unlock(&devfreq_list_lock); + return devfreq; + } + } + mutex_unlock(&devfreq_list_lock); + + return ERR_PTR(-ENODEV); +} + /* * devfreq_get_devfreq_by_phandle - Get the devfreq device from devicetree * @dev - instance to the given device @@ -988,26 +1014,24 @@ struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, int index) if (!node) return ERR_PTR(-ENODEV); - mutex_lock(&devfreq_list_lock); - list_for_each_entry(devfreq, &devfreq_list, node) { - if (devfreq->dev.parent - && devfreq->dev.parent->of_node == node) { - mutex_unlock(&devfreq_list_lock); - of_node_put(node); - return devfreq; - } - } - mutex_unlock(&devfreq_list_lock); + devfreq = devfreq_get_devfreq_by_node(node); of_node_put(node); - return ERR_PTR(-EPROBE_DEFER); + return devfreq; } + #else +struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node) +{ + return ERR_PTR(-ENODEV); +} + struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, int index) { return ERR_PTR(-ENODEV); } #endif /* CONFIG_OF */ +EXPORT_SYMBOL_GPL(devfreq_get_devfreq_by_node); EXPORT_SYMBOL_GPL(devfreq_get_devfreq_by_phandle); /** diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index c6f82d4bec9f..1dccc47acbce 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -253,6 +253,7 @@ extern void devm_devfreq_unregister_notifier(struct device *dev, struct devfreq *devfreq, struct notifier_block *nb, unsigned int list); +extern struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node); extern struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, int index); @@ -407,6 +408,11 @@ static inline void devm_devfreq_unregister_notifier(struct device *dev, { } +static inline struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node) +{ + return ERR_PTR(-ENODEV); +} + static inline struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, int index) {