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phy: core: Allow phy_pm_runtime_xxx API calls with NULL phy

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phy_init() and phy_exit() calls, and phy_power_on() and
phy_power_off() already accept NULL as valid PHY reference
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 <[email protected]>
Signed-off-by: Kishon Vijay Abraham I <[email protected]>
This commit is contained in:
Manu Gautam 2018-03-20 11:31:47 +05:30 • committed by Kishon Vijay Abraham I
commit 8866df25e5
1 changed files with 18 additions and 0 deletions
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18
drivers/phy/phy-core.c
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@ -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 @@ EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync);
int phy_pm_runtime_put(struct phy *phy)
{
if (!phy)
return 0;
if (!pm_runtime_enabled(&phy->dev))
return -ENOTSUPP;
@ -190,6 +199,9 @@ EXPORT_SYMBOL_GPL(phy_pm_runtime_put);
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 @@ EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync);
void phy_pm_runtime_allow(struct phy *phy)
{
if (!phy)
return;
if (!pm_runtime_enabled(&phy->dev))
return;
@ -208,6 +223,9 @@ EXPORT_SYMBOL_GPL(phy_pm_runtime_allow);
void phy_pm_runtime_forbid(struct phy *phy)
{
if (!phy)
return;
if (!pm_runtime_enabled(&phy->dev))
return;