linux-kernel - Re: [PATCH net-next v4 10/15] net: ravb: Move delay mode set in the driver's ndo

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Date: Wed, 24 Jan 2024 23:18:31 +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>,
	<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 v4 10/15] net: ravb: Move delay mode set in the
 driver's ndo_open API

On 1/23/24 3:58 PM, Claudiu wrote:

> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> 
> Delay parsing and setting were done in the driver's probe API. As some IP
> variants switch to reset mode (and thus registers content is lost) when

   s/registers content/the register contents/, perhaps?

> setting clocks (due to module standby functionality) to be able to
> implement runtime PM keep the delay parsing in the driver's probe function
> and move the delay applying function to the driver's ndo_open API.
> 
> Along with it, both delay specific functions were kept together.
> 
> Reviewed-by: Sergey Shtylyov <s.shtylyov@....ru>
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
[...]

> diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
> index 8956c33c60e2..69d4854d6738 100644
> --- a/drivers/net/ethernet/renesas/ravb_main.c
> +++ b/drivers/net/ethernet/renesas/ravb_main.c
> @@ -1800,6 +1800,59 @@ static int ravb_compute_gti(struct net_device *ndev)
>  	return 0;
>  }
>  
> +/* Set tx and rx clock internal delay modes */
> +static void ravb_parse_delay_mode(struct device_node *np, struct net_device *ndev)

   Wait, why are you moving this? Its call site didn't move -- it's still
down in the probe() method...

[...]
> @@ -2785,10 +2793,7 @@ static int ravb_probe(struct platform_device *pdev)
>  	if (error)
>  		goto out_rpm_put;
>  
> -	if (info->internal_delay) {
> -		ravb_parse_delay_mode(np, ndev);
> -		ravb_set_delay_mode(ndev);
> -	}
> +	ravb_parse_delay_mode(np, ndev);
>  
>  	/* Allocate descriptor base address table */
>  	priv->desc_bat_size = sizeof(struct ravb_desc) * DBAT_ENTRY_NUM;
> 

MBR, Sergey