[PATCH 1/3] phy: core: Invoke pm_runtime_get_*/pm_runtime_put_* before invoking reset callback

[Kishon Vijay Abraham I]

PHY drivers may try to access PHY registers in the ->reset() callback.
Invoke phy_pm_runtime_get_sync() before invoking the ->reset() callback
so that the PHY drivers don't have to enable clocks by themselves before
accessing PHY registers.

Signed-off-by: Kishon Vijay Abraham I <kis...@ti.com>
---
 drivers/phy/phy-core.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index 19b05e824ee4..bf3a1fc18117 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -384,10 +384,16 @@ int phy_reset(struct phy *phy)
        if (!phy || !phy->ops->reset)
                return 0;
 
+       ret = phy_pm_runtime_get_sync(phy);
+       if (ret < 0 && ret != -ENOTSUPP)
+               return ret;
+
        mutex_lock(&phy->mutex);
        ret = phy->ops->reset(phy);
        mutex_unlock(&phy->mutex);
 
+       phy_pm_runtime_put(phy);
+
        return ret;
 }
 EXPORT_SYMBOL_GPL(phy_reset);
-- 
2.17.1