linux-kernel - Re: [PATCH net] net: phy: micrel: populate .soft

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Date: Fri, 5 Jan 2024 09:43:22 +0000
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Claudiu <claudiu.beznea@...on.dev>
Cc: andrew@...n.ch, hkallweit1@...il.com, davem@...emloft.net,
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
	yuiko.oshino@...rochip.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH net] net: phy: micrel: populate .soft_reset for KSZ9131

On Fri, Jan 05, 2024 at 10:52:42AM +0200, Claudiu wrote:
> The order of PHY-related operations in ravb_open() is as follows:
> ravb_open() ->
>   ravb_phy_start() ->
>     ravb_phy_init() ->
>       of_phy_connect() ->
>         phy_connect_direct() ->
> 	  phy_attach_direct() ->
> 	    phy_init_hw() ->
> 	      phydev->drv->soft_reset()
> 	      phydev->drv->config_init()
> 	      phydev->drv->config_intr()
> 	    phy_resume()
> 	      kszphy_resume()
> 
> The order of PHY-related operations in ravb_close is as follows:
> ravb_close() ->
>   phy_stop() ->
>     phy_suspend() ->
>       kszphy_suspend() ->
>         genphy_suspend()
> 	  // set BMCR_PDOWN bit in MII_BMCR

Andrew,

This looks wrong to me - shouldn't we be resuming the PHY before
attempting to configure it?

-- 
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