netdev - Re: [PATCH net-next v2 11/21] net: ravb: Move DBAT configuration to the driver's ndo

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Date: Fri, 15 Dec 2023 23:01:43 +0300
From: Sergey Shtylyov <s.shtylyov@....ru>
To: Claudiu <claudiu.beznea@...on.dev>, <davem@...emloft.net>,
	<edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
	<richardcochran@...il.com>, <p.zabel@...gutronix.de>,
	<yoshihiro.shimoda.uh@...esas.com>, <wsa+renesas@...g-engineering.com>,
	<geert+renesas@...der.be>
CC: <netdev@...r.kernel.org>, <linux-renesas-soc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Claudiu Beznea
	<claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH net-next v2 11/21] net: ravb: Move DBAT configuration to
 the driver's ndo_open API

On 12/15/23 12:03 AM, Sergey Shtylyov wrote:
[...]

>> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
>>
>> DBAT setup was done in the driver's probe API. As some IP variants switch
>> to reset mode (and thus registers' content is lost) when setting clocks
>> (due to module standby functionality) to be able to implement runtime PM
>> move the DBAT configuration in the driver's ndo_open API.
>>
>> This commit prepares the code for the addition of runtime PM.
>>
>> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> 
> Reviewed-by: Sergey Shtylyov <s.shtylyov@....ru>
> 
> [...]
>> diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
>> index 04eaa1967651..6b8ca08be35e 100644
>> --- a/drivers/net/ethernet/renesas/ravb_main.c
>> +++ b/drivers/net/ethernet/renesas/ravb_main.c
>> @@ -1822,6 +1822,7 @@ static int ravb_open(struct net_device *ndev)
>>  		napi_enable(&priv->napi[RAVB_NC]);
>>  
>>  	ravb_set_delay_mode(ndev);
>> +	ravb_write(ndev, priv->desc_bat_dma, DBAT);

   Looking at it again, I suspect this belong in ravb_dmac_init()...

>>  
>>  	/* Device init */
>>  	error = ravb_dmac_init(ndev);
[...]

MBR, Sergey