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Date: Mon, 25 Mar 2019 13:38:12 +0530 From: Kishon Vijay Abraham I <kishon@...com> To: Rob Herring <robh+dt@...nel.org>, Roger Quadros <rogerq@...com>, Kishon Vijay Abraham I <kishon@...com> CC: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org> Subject: [PATCH v3 2/5] 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@...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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