Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit fa9b274f authored by Viresh Kumar's avatar Viresh Kumar
Browse files

PM / OPP: Implement dev_pm_opp_of_add_table_indexed() 



The "operating-points-v2" property can contain a list of phandles now,
specifically for the power domain providers that provide multiple
domains.

Add support to parse that.

Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent a1e8c136

drivers/opp/of.c

+41 −9
Original line number Diff line number Diff line
@@ -250,20 +250,17 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_of_remove_table); 


/* Returns opp descriptor node for a device node, caller must

 * do of_node_put() */

static struct device_node *_opp_of_get_opp_desc_node(struct device_node *np)

static struct device_node *_opp_of_get_opp_desc_node(struct device_node *np,

						     int index)

{

	/*

	 * There should be only ONE phandle present in "operating-points-v2"

	 * property.

	 */



	return of_parse_phandle(np, "operating-points-v2", 0);

	/* "operating-points-v2" can be an array for power domain providers */

	return of_parse_phandle(np, "operating-points-v2", index);

}



/* Returns opp descriptor node for a device, caller must do of_node_put() */

struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev)

{

	return _opp_of_get_opp_desc_node(dev->of_node);

	return _opp_of_get_opp_desc_node(dev->of_node, 0);

}

EXPORT_SYMBOL_GPL(dev_pm_opp_of_get_opp_desc_node);
@@ -517,6 +514,41 @@ int dev_pm_opp_of_add_table(struct device *dev) 
}

EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table);



/**

 * dev_pm_opp_of_add_table_indexed() - Initialize indexed opp table from device tree

 * @dev:	device pointer used to lookup OPP table.

 * @index:	Index number.

 *

 * Register the initial OPP table with the OPP library for given device only

 * using the "operating-points-v2" property.

 *

 * Return:

 * 0		On success OR

 *		Duplicate OPPs (both freq and volt are same) and opp->available

 * -EEXIST	Freq are same and volt are different OR

 *		Duplicate OPPs (both freq and volt are same) and !opp->available

 * -ENOMEM	Memory allocation failure

 * -ENODEV	when 'operating-points' property is not found or is invalid data

 *		in device node.

 * -ENODATA	when empty 'operating-points' property is found

 * -EINVAL	when invalid entries are found in opp-v2 table

 */

int dev_pm_opp_of_add_table_indexed(struct device *dev, int index)

{

	struct device_node *opp_np;

	int ret;



	opp_np = _opp_of_get_opp_desc_node(dev->of_node, index);

	if (!opp_np)

		return -ENODEV;



	ret = _of_add_opp_table_v2(dev, opp_np);

	of_node_put(opp_np);



	return ret;

}

EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table_indexed);



/* CPU device specific helpers */



/**
@@ -621,7 +653,7 @@ int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, 
		}



		/* Get OPP descriptor node */

		tmp_np = _opp_of_get_opp_desc_node(cpu_np);

		tmp_np = _opp_of_get_opp_desc_node(cpu_np, 0);

		of_node_put(cpu_np);

		if (!tmp_np) {

			pr_err("%pOF: Couldn't find opp node\n", cpu_np);

include/linux/pm_opp.h

+6 −0
Original line number Diff line number Diff line
@@ -303,6 +303,7 @@ static inline void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask 


#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)

int dev_pm_opp_of_add_table(struct device *dev);

int dev_pm_opp_of_add_table_indexed(struct device *dev, int index);

void dev_pm_opp_of_remove_table(struct device *dev);

int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask);

void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask);
@@ -314,6 +315,11 @@ static inline int dev_pm_opp_of_add_table(struct device *dev) 
	return -ENOTSUPP;

}



static inline int dev_pm_opp_of_add_table_indexed(struct device *dev, int index)

{

	return -ENOTSUPP;

}



static inline void dev_pm_opp_of_remove_table(struct device *dev)

{

}