linux-kernel - Re: [PATCH] phy: marvell: phy-mvebu-a3700-comphy: Remove broken reset support

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Message-ID: <Yw2aBNnVoV8wwk4i@matsya>
Date:   Tue, 30 Aug 2022 10:33:00 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Pali Rohár <pali@...nel.org>
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Marek Behún <kabel@...nel.org>,
        Shinichiro Kawasaki <shinichiro.kawasaki@....com>,
        Damien Le Moal <Damien.LeMoal@....com>,
        linux-phy@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] phy: marvell: phy-mvebu-a3700-comphy: Remove broken
 reset support

On 29-08-22, 10:30, Pali Rohár wrote:
> Reset support for SATA PHY is somehow broken and after calling it, kernel
> is not able to detect and initialize SATA disk Samsung SSD 850 EMT0 [1].
> 
> Reset support was introduced in commit 934337080c6c ("phy: marvell:
> phy-mvebu-a3700-comphy: Add native kernel implementation") as part of
> complete rewrite of this driver. v1 patch series of that commit [2] did
> not contain reset support and was tested that is working fine with
> Ethernet, SATA and USB PHYs without issues too.
> 
> So for now remove broken reset support and change implementation of
> power_off callback to power off all functions on specified lane (and not
> only selected function) because during startup kernel does not know which
> function was selected and configured by bootloader. Same logic was used
> also in v1 patch series of that commit.
> 
> This change fixes issues with initialization of SATA disk Samsung SSD 850
> and disk is working again, like before mentioned commit.
> 
> Once problem with PHY reset callback is solved its functionality could be
> re-introduced. But for now it is unknown why it does not work.

Applied, thanks

-- 
~Vinod