[PATCH net-next 3/3] net: systemport: Manage Wake-on-LAN clock
From: Florian Fainelli <f.fainelli@gmail.com>
Date: 2020-09-01 21:44:16
Also in:
linux-devicetree, lkml
Subsystem:
broadcom systemport ethernet driver, networking drivers, the rest · Maintainers:
Florian Fainelli, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
It is necessary to manage the Wake-on-LAN clock to turn on the appropriate blocks for MPD or CFP-based packet matching to work otherwise we will not be able to reliably match packets during suspend. Reported-by: Blair Prescott <redacted> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> --- drivers/net/ethernet/broadcom/bcmsysport.c | 10 +++++++++- drivers/net/ethernet/broadcom/bcmsysport.h | 1 + 2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c
index 91eadba5540c..b25c70b74c92 100644
--- a/drivers/net/ethernet/broadcom/bcmsysport.c
+++ b/drivers/net/ethernet/broadcom/bcmsysport.c@@ -2583,6 +2583,10 @@ static int bcm_sysport_probe(struct platform_device *pdev) if (!ret) device_set_wakeup_capable(&pdev->dev, 1); + priv->wol_clk = devm_clk_get_optional(&pdev->dev, "sw_sysportwol"); + if (IS_ERR(priv->wol_clk)) + return PTR_ERR(priv->wol_clk); + /* Set the needed headroom once and for all */ BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8); dev->needed_headroom += sizeof(struct bcm_tsb);
@@ -2772,8 +2776,10 @@ static int __maybe_unused bcm_sysport_suspend(struct device *d) bcm_sysport_fini_rx_ring(priv); /* Get prepared for Wake-on-LAN */ - if (device_may_wakeup(d) && priv->wolopts) + if (device_may_wakeup(d) && priv->wolopts) { + clk_prepare_enable(priv->wol_clk); ret = bcm_sysport_suspend_to_wol(priv); + } clk_disable_unprepare(priv->clk);
@@ -2791,6 +2797,8 @@ static int __maybe_unused bcm_sysport_resume(struct device *d) return 0; clk_prepare_enable(priv->clk); + if (priv->wolopts) + clk_disable_unprepare(priv->wol_clk); umac_reset(priv);
diff --git a/drivers/net/ethernet/broadcom/bcmsysport.h b/drivers/net/ethernet/broadcom/bcmsysport.h
index 51800053e88c..3a5cb6f128f5 100644
--- a/drivers/net/ethernet/broadcom/bcmsysport.h
+++ b/drivers/net/ethernet/broadcom/bcmsysport.h@@ -771,6 +771,7 @@ struct bcm_sysport_priv { u8 sopass[SOPASS_MAX]; unsigned int wol_irq_disabled:1; struct clk *clk; + struct clk *wol_clk; /* MIB related fields */ struct bcm_sysport_mib mib;
--
2.25.1