linux-kernel - Re: [PATCH v2 7/7] net: phy: Add pm support to Broadcom iProc mdio mux driver

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Message-ID: <f298c64e-d8de-0e6d-3c4d-f62b257329f9@broadcom.com>
Date:   Tue, 31 Jul 2018 10:51:48 -0700
From:   Arun Parameswaran <arun.parameswaran@...adcom.com>
To:     Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Andrew Lunn <andrew@...n.ch>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com
Subject: Re: [PATCH v2 7/7] net: phy: Add pm support to Broadcom iProc mdio
 mux driver

Hi Florian,

On 18-07-30 03:53 PM, Florian Fainelli wrote:
> On 07/27/2018 02:23 PM, Arun Parameswaran wrote:
>> Add support for suspend and resume to the Broadcom iProc mdio
>> mux driver.
>>
>> Signed-off-by: Arun Parameswaran <arun.parameswaran@...adcom.com>
>> ---
>>  drivers/net/phy/mdio-mux-bcm-iproc.c | 28 ++++++++++++++++++++++++++++
>>  1 file changed, 28 insertions(+)
>>
>> diff --git a/drivers/net/phy/mdio-mux-bcm-iproc.c b/drivers/net/phy/mdio-mux-bcm-iproc.c
>> index 51d1003..d89dce0 100644
>> --- a/drivers/net/phy/mdio-mux-bcm-iproc.c
>> +++ b/drivers/net/phy/mdio-mux-bcm-iproc.c
>> @@ -290,6 +290,33 @@ static int mdio_mux_iproc_remove(struct platform_device *pdev)
>>  	return 0;
>>  }
>>  
>> +#ifdef CONFIG_PM_SLEEP
>> +static int mdio_mux_iproc_suspend(struct device *dev)
>> +{
>> +	struct iproc_mdiomux_desc *md = dev_get_drvdata(dev);
>> +
>> +	if (md->core_clk)
>> +		clk_disable_unprepare(md->core_clk);
> 
> Since you are assigning md->core_clk to NULL in case clk_get() returned
> an error, checking for md->core_clk is not necessary since the Linux
> common clock framework perform that NULL check already.
> 
Will remove the check.

I am working on Andrew's comments (which will add one more patch to the series).
I will send the whole patchset again, with reviewed-by tags (From Florian
and Andrew on the ones that apply).

Thanks
Arun