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: Roger Quadros <rogerq@ti.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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2 changed files with 28 additions and 0 deletions
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@ -21,6 +21,7 @@
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#include <linux/phy/phy.h>
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#include <linux/phy/phy.h>
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#include <linux/idr.h>
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#include <linux/idr.h>
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#include <linux/pm_runtime.h>
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#include <linux/pm_runtime.h>
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#include <linux/regulator/consumer.h>
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static struct class *phy_class;
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static struct class *phy_class;
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static DEFINE_MUTEX(phy_provider_mutex);
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static DEFINE_MUTEX(phy_provider_mutex);
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@ -226,6 +227,12 @@ int phy_power_on(struct phy *phy)
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if (!phy)
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if (!phy)
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return 0;
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return 0;
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if (phy->pwr) {
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ret = regulator_enable(phy->pwr);
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if (ret)
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return ret;
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}
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ret = phy_pm_runtime_get_sync(phy);
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ret = phy_pm_runtime_get_sync(phy);
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if (ret < 0 && ret != -ENOTSUPP)
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if (ret < 0 && ret != -ENOTSUPP)
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return ret;
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return ret;
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@ -247,6 +254,8 @@ int phy_power_on(struct phy *phy)
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out:
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out:
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mutex_unlock(&phy->mutex);
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mutex_unlock(&phy->mutex);
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phy_pm_runtime_put_sync(phy);
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phy_pm_runtime_put_sync(phy);
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if (phy->pwr)
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regulator_disable(phy->pwr);
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return ret;
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return ret;
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}
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}
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@ -272,6 +281,9 @@ int phy_power_off(struct phy *phy)
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mutex_unlock(&phy->mutex);
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mutex_unlock(&phy->mutex);
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phy_pm_runtime_put(phy);
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phy_pm_runtime_put(phy);
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if (phy->pwr)
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regulator_disable(phy->pwr);
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return 0;
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return 0;
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}
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}
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EXPORT_SYMBOL_GPL(phy_power_off);
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EXPORT_SYMBOL_GPL(phy_power_off);
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@ -588,6 +600,16 @@ struct phy *phy_create(struct device *dev, const struct phy_ops *ops,
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goto free_phy;
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goto free_phy;
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}
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}
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/* phy-supply */
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phy->pwr = regulator_get_optional(dev, "phy");
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if (IS_ERR(phy->pwr)) {
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if (PTR_ERR(phy->pwr) == -EPROBE_DEFER) {
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ret = -EPROBE_DEFER;
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goto free_ida;
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}
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phy->pwr = NULL;
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}
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device_initialize(&phy->dev);
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device_initialize(&phy->dev);
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mutex_init(&phy->mutex);
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mutex_init(&phy->mutex);
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@ -617,6 +639,9 @@ put_dev:
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put_device(&phy->dev); /* calls phy_release() which frees resources */
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put_device(&phy->dev); /* calls phy_release() which frees resources */
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return ERR_PTR(ret);
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return ERR_PTR(ret);
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free_ida:
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ida_simple_remove(&phy_ida, phy->id);
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free_phy:
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free_phy:
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kfree(phy);
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kfree(phy);
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return ERR_PTR(ret);
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return ERR_PTR(ret);
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@ -800,6 +825,7 @@ static void phy_release(struct device *dev)
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phy = to_phy(dev);
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phy = to_phy(dev);
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dev_vdbg(dev, "releasing '%s'\n", dev_name(dev));
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dev_vdbg(dev, "releasing '%s'\n", dev_name(dev));
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regulator_put(phy->pwr);
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ida_simple_remove(&phy_ida, phy->id);
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ida_simple_remove(&phy_ida, phy->id);
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kfree(phy);
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kfree(phy);
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}
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}
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@ -18,6 +18,7 @@
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#include <linux/of.h>
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#include <linux/of.h>
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#include <linux/device.h>
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#include <linux/device.h>
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#include <linux/pm_runtime.h>
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#include <linux/pm_runtime.h>
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#include <linux/regulator/consumer.h>
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struct phy;
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struct phy;
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@ -65,6 +66,7 @@ struct phy {
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int init_count;
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int init_count;
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int power_count;
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int power_count;
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struct phy_attrs attrs;
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struct phy_attrs attrs;
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struct regulator *pwr;
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};
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};
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/**
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/**
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