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Message-Id: <1521191452-30089-1-git-send-email-mgautam@codeaurora.org>
Date: Fri, 16 Mar 2018 14:40:51 +0530
From: Manu Gautam <mgautam@...eaurora.org>
To: Kishon Vijay Abraham I <kishon@...com>
Cc: linux-arm-msm@...r.kernel.org,
Manu Gautam <mgautam@...eaurora.org>,
linux-kernel@...r.kernel.org (open list:GENERIC PHY FRAMEWORK)
Subject: [PATCH] phy: core: Allow phy_pm_runtime_xxx API calls with NULL phy
phy_init() and phy_exit() calls, and phy_power_on() and
phy_power_off() already accept NULL as valid PHY refernece
and act as NOP. Extend same concept to phy runtime_pm APIs
to keep drivers (e.g. dwc3) code simple while dealing with
optional PHYs.
Signed-off-by: Manu Gautam <mgautam@...eaurora.org>
---
drivers/phy/phy-core.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index 09ac8af..48b9615 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -153,6 +153,9 @@ int phy_pm_runtime_get(struct phy *phy)
{
int ret;
+ if (!phy)
+ return 0;
+
if (!pm_runtime_enabled(&phy->dev))
return -ENOTSUPP;
@@ -168,6 +171,9 @@ int phy_pm_runtime_get_sync(struct phy *phy)
{
int ret;
+ if (!phy)
+ return 0;
+
if (!pm_runtime_enabled(&phy->dev))
return -ENOTSUPP;
@@ -181,6 +187,9 @@ int phy_pm_runtime_get_sync(struct phy *phy)
int phy_pm_runtime_put(struct phy *phy)
{
+ if (!phy)
+ return 0;
+
if (!pm_runtime_enabled(&phy->dev))
return -ENOTSUPP;
@@ -190,6 +199,9 @@ int phy_pm_runtime_put(struct phy *phy)
int phy_pm_runtime_put_sync(struct phy *phy)
{
+ if (!phy)
+ return 0;
+
if (!pm_runtime_enabled(&phy->dev))
return -ENOTSUPP;
@@ -199,6 +211,9 @@ int phy_pm_runtime_put_sync(struct phy *phy)
void phy_pm_runtime_allow(struct phy *phy)
{
+ if (!phy)
+ return 0;
+
if (!pm_runtime_enabled(&phy->dev))
return;
@@ -208,6 +223,9 @@ void phy_pm_runtime_allow(struct phy *phy)
void phy_pm_runtime_forbid(struct phy *phy)
{
+ if (!phy)
+ return 0;
+
if (!pm_runtime_enabled(&phy->dev))
return;
--
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