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Date: Thu, 11 Nov 2021 18:02:29 +0300
From: Denis Kirjanov <dkirjanov@...e.de>
To: "Li, Meng" <Meng.Li@...driver.com>,
"peppe.cavallaro@...com" <peppe.cavallaro@...com>,
"alexandre.torgue@...s.st.com" <alexandre.torgue@...s.st.com>,
"joabreu@...opsys.com" <joabreu@...opsys.com>,
"davem@...emloft.net" <davem@...emloft.net>,
"kuba@...nel.org" <kuba@...nel.org>,
"mcoquelin.stm32@...il.com" <mcoquelin.stm32@...il.com>
Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-stm32@...md-mailman.stormreply.com"
<linux-stm32@...md-mailman.stormreply.com>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net: stmmac: socfpga: add runtime suspend/resume callback
for stratix10 platform
11/11/21 5:16 PM, Li, Meng пишет:
>
>
>> -----Original Message-----
>> From: Denis Kirjanov <dkirjanov@...e.de>
>> Sent: Thursday, November 11, 2021 10:02 PM
>> To: Li, Meng <Meng.Li@...driver.com>; peppe.cavallaro@...com;
>> alexandre.torgue@...s.st.com; joabreu@...opsys.com;
>> davem@...emloft.net; kuba@...nel.org; mcoquelin.stm32@...il.com
>> Cc: netdev@...r.kernel.org; linux-stm32@...md-mailman.stormreply.com;
>> linux-arm-kernel@...ts.infradead.org; linux-kernel@...r.kernel.org
>> Subject: Re: [PATCH] net: stmmac: socfpga: add runtime suspend/resume
>> callback for stratix10 platform
>>
>> [Please note: This e-mail is from an EXTERNAL e-mail address]
>>
>> 11/11/21 4:56 PM, Meng Li пишет:
>>> From: Meng Li <meng.li@...driver.com>
>>>
>>> According to upstream commit 5ec55823438e("net: stmmac:
>>> add clocks management for gmac driver "), it improve clocks management
>>> for stmmac driver. So, it is necessary to implement the runtime
>>> callback in dwmac-socfpga driver because it doesn’t use the common
>>> stmmac_pltfr_pm_ops instance. Otherwise, clocks are not disabled when
>>> system enters suspend status.
>>
>> Please add Fixes tag
>
> Thanks for suggest.
> Yes! this patch is used to fix an clock operation issue in dwmac-socfpga driver,
> But I am not sure which Fixing commit ID I should use.
> Because 5ec55823438e breaks the original clock operation of dwmac-socfpga driver, but this commit 5ec55823438e is not a bug.
> Moreover, if without 5ec55823438e dwmac-socfpga driver also works fine.
Yes I see. I also checked the commit 5ec55823438e and it logically
relates to your change
>
> How about your suggest?
>
> Thanks,
> Limeng
>
>>>
>>> Signed-off-by: Meng Li <Meng.Li@...driver.com>
>>> ---
>>> .../ethernet/stmicro/stmmac/dwmac-socfpga.c | 24
>> +++++++++++++++++--
>>> 1 file changed, 22 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
>>> b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
>>> index 85208128f135..93abde467de4 100644
>>> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
>>> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
>>> @@ -485,8 +485,28 @@ static int socfpga_dwmac_resume(struct device
>> *dev)
>>> }
>>> #endif /* CONFIG_PM_SLEEP */
>>>
>>> -static SIMPLE_DEV_PM_OPS(socfpga_dwmac_pm_ops, stmmac_suspend,
>>> - socfpga_dwmac_resume);
>>> +static int __maybe_unused socfpga_dwmac_runtime_suspend(struct
>> device
>>> +*dev) {
>>> + struct net_device *ndev = dev_get_drvdata(dev);
>>> + struct stmmac_priv *priv = netdev_priv(ndev);
>>> +
>>> + stmmac_bus_clks_config(priv, false);
>> check the return value?
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static int __maybe_unused socfpga_dwmac_runtime_resume(struct
>> device
>>> +*dev) {
>>> + struct net_device *ndev = dev_get_drvdata(dev);
>>> + struct stmmac_priv *priv = netdev_priv(ndev);
>>> +
>>> + return stmmac_bus_clks_config(priv, true); }
>>> +
>>> +const struct dev_pm_ops socfpga_dwmac_pm_ops = {
>>> + SET_SYSTEM_SLEEP_PM_OPS(stmmac_suspend,
>> socfpga_dwmac_resume)
>>> + SET_RUNTIME_PM_OPS(socfpga_dwmac_runtime_suspend,
>>> +socfpga_dwmac_runtime_resume, NULL) };
>>>
>>> static const struct socfpga_dwmac_ops socfpga_gen5_ops = {
>>> .set_phy_mode = socfpga_gen5_set_phy_mode,
>>>
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