[PATCH net-next] net: stmmac: dwmac-renesas-gbeth: Add PM suspend/resume callbacks

[Biju Das]

> -----Original Message-----
> From: Biju Das <biju.das.jz at bp.renesas.com>
> Sent: 16 July 2025 19:20
> Subject: RE: [PATCH net-next] net: stmmac: dwmac-renesas-gbeth: Add PM suspend/resume callbacks
> 
> Hi all,
> 
> > -----Original Message-----
> > From: Biju Das <biju.das.jz at bp.renesas.com>
> > Sent: 05 July 2025 18:03
> > Subject: [PATCH net-next] net: stmmac: dwmac-renesas-gbeth: Add PM
> > suspend/resume callbacks
> >
> > Add PM suspend/resume callbacks for RZ/G3E SMARC EVK.
> >
> > The PM deep entry is executed by pressing the SLEEP button and exit
> > from entry is by pressing the power button.
> >
> > Logs:
> > root at smarc-rzg3e:~# PM: suspend entry (deep) Filesystems sync: 0.115
> > seconds Freezing user space processes Freezing user space processes completed (elapsed 0.002
> seconds) OOM killer disabled.
> > Freezing remaining freezable tasks
> > Freezing remaining freezable tasks completed (elapsed 0.001 seconds)
> > printk: Suspending console(s) (use no_console_suspend to debug)
> > NOTICE:  BL2: v2.10.5(release):2.10.5/rz_soc_dev-162-g7148ba838
> > NOTICE:  BL2: Built : 14:23:58, Jul  5 2025
> > NOTICE:  BL2: SYS_LSI_MODE: 0x13e06
> > NOTICE:  BL2: SYS_LSI_DEVID: 0x8679447
> > NOTICE:  BL2: SYS_LSI_PRR: 0x0
> > NOTICE:  BL2: Booting BL31
> > renesas-gbeth 15c30000.ethernet end0: Link is Down Disabling non-boot CPUs ...
> > psci: CPU3 killed (polled 0 ms)
> > psci: CPU2 killed (polled 0 ms)
> > psci: CPU1 killed (polled 0 ms)
> > Enabling non-boot CPUs ...
> > Detected VIPT I-cache on CPU1
> > GICv3: CPU1: found redistributor 100 region 0:0x0000000014960000
> > CPU1: Booted secondary processor 0x0000000100 [0x412fd050]
> > CPU1 is up
> > Detected VIPT I-cache on CPU2
> > GICv3: CPU2: found redistributor 200 region 0:0x0000000014980000
> > CPU2: Booted secondary processor 0x0000000200 [0x412fd050]
> > CPU2 is up
> > Detected VIPT I-cache on CPU3
> > GICv3: CPU3: found redistributor 300 region 0:0x00000000149a0000
> > CPU3: Booted secondary processor 0x0000000300 [0x412fd050]
> > CPU3 is up
> > dwmac4: Master AXI performs fixed burst length 15c30000.ethernet end0:
> > No Safety Features support found 15c30000.ethernet end0: IEEE 1588-2008 Advanced Timestamp supported
> 15c30000.ethernet end0:
> > configuring for phy/rgmii-id link mode
> > dwmac4: Master AXI performs fixed burst length 15c40000.ethernet end1:
> > No Safety Features support found 15c40000.ethernet end1: IEEE 1588-2008 Advanced Timestamp supported
> 15c40000.ethernet end1:
> > configuring for phy/rgmii-id link mode OOM killer enabled.
> > Restarting tasks: Starting
> > Restarting tasks: Done
> > random: crng reseeded on system resumption
> > PM: suspend exit
> >
> > 15c30000.ethernet end0: Link is Up - 1Gbps/Full - flow control rx/tx
> > root at smarc-rzg3e:~# ifconfig end0
> > 192.168.10.7 up root at smarc-rzg3e:~# ping 192.168.10.1 PING
> > 192.168.10.1 (192.168.10.1) 56(84) bytes of data.
> > 64 bytes from 192.168.10.1: icmp_seq=1 ttl=64 time=2.05 ms
> > 64 bytes from 192.168.10.1: icmp_seq=2 ttl=64 time=0.928 ms
> >
> > Signed-off-by: Biju Das <biju.das.jz at bp.renesas.com>
> > ---
> > This patch is tested with out-of tree patch for save/restore ethernet
> > OEN registers in the pinctrl block.
> > ---
> >  drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c
> > b/drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c
> > index 9a774046455b..df4ca897a60c 100644
> > --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c
> > +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c
> > @@ -136,6 +136,7 @@ static struct platform_driver renesas_gbeth_driver = {
> >  	.probe  = renesas_gbeth_probe,
> >  	.driver = {
> >  		.name		= "renesas-gbeth",
> > +		.pm		= &stmmac_pltfr_pm_ops,
> >  		.of_match_table	= renesas_gbeth_match,
> >  	},
> >  };
> 
> 
> Gentle ping.

On the patchwork[1], I see this patch is marked as change requested.

The change is in PHY driver[2].

I will send V2 with collected logs.

[1] https://patchwork.kernel.org/project/netdevbpf/patch/20250705170326.106073-1-biju.das.jz@bp.renesas.com/

[2] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=next-20250716&id=f25a7eaa897f21396e99f90809af82ca553c9d14

Cheers,
Biju