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phy: core: Support regulator supply for PHY power

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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: Roger Quadros <rogerq@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Roger Quadros 2014-07-04 12:55:45 +03:00 committed by Kishon Vijay Abraham I
parent 016e0d3cb7
commit 3be88125d8
2 changed files with 28 additions and 0 deletions
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26
drivers/phy/phy-core.c
View File

@ -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);
}

2
include/linux/phy/phy.h
View File

@ -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;
};
/**