[PATCH v5 1/2] phy: core: Use runtime pm during configure too

[Guido Günther]

The phy's configure phase usually needs register access so taking the
device out of pm_runtime suspend looks useful.

There's currently two in tree drivers using runtime pm and .configure
(qualcomm/phy-qcom-qmp.c, rockchip/phy-rockchip-inno-dsidphy.c) but both
don't use the phy layers 'transparent' runtime phy_pm_runtime handling
but manage it manually so this will for now only affect the
phy-fsl-imx8-mipi-dphy driver.

Signed-off-by: Guido Günther <agx at sigxcpu.org>
---
 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 ccb575b13777..256a964d52d3 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -470,10 +470,16 @@ int phy_configure(struct phy *phy, union phy_configure_opts *opts)
 	if (!phy->ops->configure)
 		return -EOPNOTSUPP;
 
+	ret = phy_pm_runtime_get_sync(phy);
+	if (ret < 0 && ret != -ENOTSUPP)
+		return ret;
+	ret = 0; /* Override possible ret == -ENOTSUPP */
+
 	mutex_lock(&phy->mutex);
 	ret = phy->ops->configure(phy, opts);
 	mutex_unlock(&phy->mutex);
 
+	phy_pm_runtime_put(phy);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(phy_configure);
-- 
2.30.1