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Subject[PATCH v4 2/5] phy: core: Invoke pm_runtime_get_*/pm_runtime_put_* before invoking reset callback
Date
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 <kishon@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 b9a4ebf35dd3..c147ba843f0b 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
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