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authorKishon Vijay Abraham I <kishon@ti.com>2019-04-05 14:08:31 +0300
committerKishon Vijay Abraham I <kishon@ti.com>2019-04-17 11:43:17 +0300
commit4df614c4ab18ba14892dfa82b88c28203096e951 (patch)
tree0e175c63d915ed522897f962e1dda97cc932c67d /drivers/phy
parentfec06b2bc436d1cbc3482becd40f656d46cd22b7 (diff)
downloadlinux-4df614c4ab18ba14892dfa82b88c28203096e951.tar.xz
phy: core: Invoke pm_runtime_get_*/pm_runtime_put_* before invoking reset callback
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>
Diffstat (limited to 'drivers/phy')
-rw-r--r--drivers/phy/phy-core.c6
1 files changed, 6 insertions, 0 deletions
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);