[PATCH NET v6 1/2] net: phylink: add mac_managed_pm in phylink_config structure

[Shenwei Wang]

The recent commit

'commit 744d23c71af3 ("net: phy: Warn about incorrect
mdio_bus_phy_resume() state")'

requires the MAC driver explicitly tell the phy driver who is
managing the PM, otherwise you will see warning during resume
stage.

Add a boolean property in the phylink_config structure so that
the MAC driver can use it to tell the PHY driver if it wants to
manage the PM.

Fixes: 744d23c71af3 ("net: phy: Warn about incorrect mdio_bus_phy_resume() state")
Signed-off-by: Shenwei Wang <shenwei.wang at nxp.com>
Acked-by: Florian Fainelli <f.fainelli at gmail.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel at armlinux.org.uk>
---
 drivers/net/phy/phylink.c | 3 +++
 include/linux/phylink.h   | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 75464df191ef..6547b6cc6cbe 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -1661,6 +1661,9 @@ static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy,
 	if (phy_interrupt_is_valid(phy))
 		phy_request_interrupt(phy);
 
+	if (pl->config->mac_managed_pm)
+		phy->mac_managed_pm = true;
+
 	return 0;
 }
 
diff --git a/include/linux/phylink.h b/include/linux/phylink.h
index 664dd409feb9..3f01ac8017e0 100644
--- a/include/linux/phylink.h
+++ b/include/linux/phylink.h
@@ -122,6 +122,7 @@ enum phylink_op_type {
  *	(See commit 7cceb599d15d ("net: phylink: avoid mac_config calls")
  * @poll_fixed_state: if true, starts link_poll,
  *		      if MAC link is at %MLO_AN_FIXED mode.
+ * @mac_managed_pm: if true, indicate the MAC driver is responsible for PHY PM.
  * @ovr_an_inband: if true, override PCS to MLO_AN_INBAND
  * @get_fixed_state: callback to execute to determine the fixed link state,
  *		     if MAC link is at %MLO_AN_FIXED mode.
@@ -134,6 +135,7 @@ struct phylink_config {
 	enum phylink_op_type type;
 	bool legacy_pre_march2020;
 	bool poll_fixed_state;
+	bool mac_managed_pm;
 	bool ovr_an_inband;
 	void (*get_fixed_state)(struct phylink_config *config,
 				struct phylink_link_state *state);
-- 
2.34.1