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Commit 3be88125 authored by Roger Quadros's avatar Roger Quadros Committed by Kishon Vijay Abraham I
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phy: core: Support regulator supply for PHY power 



Some PHYs can be powered by an external power regulator.
e.g. USB_HS PHY on DRA7 SoC. Make the PHY core support a
power regulator.

Signed-off-by: default avatarRoger Quadros <rogerq@ti.com>
Signed-off-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
parent 016e0d3c

drivers/phy/phy-core.c

+26 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <linux/phy/phy.h>

#include <linux/idr.h>

#include <linux/pm_runtime.h>

#include <linux/regulator/consumer.h>



static struct class *phy_class;

static DEFINE_MUTEX(phy_provider_mutex);
@@ -226,6 +227,12 @@ int phy_power_on(struct phy *phy) 
	if (!phy)

		return 0;



	if (phy->pwr) {

		ret = regulator_enable(phy->pwr);

		if (ret)

			return ret;

	}



	ret = phy_pm_runtime_get_sync(phy);

	if (ret < 0 && ret != -ENOTSUPP)

		return ret;
@@ -247,6 +254,8 @@ int phy_power_on(struct phy *phy) 
out:

	mutex_unlock(&phy->mutex);

	phy_pm_runtime_put_sync(phy);

	if (phy->pwr)

		regulator_disable(phy->pwr);



	return ret;

}
@@ -272,6 +281,9 @@ int phy_power_off(struct phy *phy) 
	mutex_unlock(&phy->mutex);

	phy_pm_runtime_put(phy);



	if (phy->pwr)

		regulator_disable(phy->pwr);



	return 0;

}

EXPORT_SYMBOL_GPL(phy_power_off);
@@ -588,6 +600,16 @@ struct phy *phy_create(struct device *dev, const struct phy_ops *ops, 
		goto free_phy;

	}



	/* phy-supply */

	phy->pwr = regulator_get_optional(dev, "phy");

	if (IS_ERR(phy->pwr)) {

		if (PTR_ERR(phy->pwr) == -EPROBE_DEFER) {

			ret = -EPROBE_DEFER;

			goto free_ida;

		}

		phy->pwr = NULL;

	}



	device_initialize(&phy->dev);

	mutex_init(&phy->mutex);
@@ -617,6 +639,9 @@ struct phy *phy_create(struct device *dev, const struct phy_ops *ops, 
	put_device(&phy->dev);  /* calls phy_release() which frees resources */

	return ERR_PTR(ret);



free_ida:

	ida_simple_remove(&phy_ida, phy->id);



free_phy:

	kfree(phy);

	return ERR_PTR(ret);
@@ -800,6 +825,7 @@ static void phy_release(struct device *dev) 


	phy = to_phy(dev);

	dev_vdbg(dev, "releasing '%s'\n", dev_name(dev));

	regulator_put(phy->pwr);

	ida_simple_remove(&phy_ida, phy->id);

	kfree(phy);

}

include/linux/phy/phy.h

+2 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include <linux/of.h>

#include <linux/device.h>

#include <linux/pm_runtime.h>

#include <linux/regulator/consumer.h>



struct phy;
@@ -65,6 +66,7 @@ struct phy { 
	int			init_count;

	int			power_count;

	struct phy_attrs	attrs;

	struct regulator	*pwr;

};



/**