linux-kernel - Re: [PATCH 10/17] phy: samsung-ufs: ufs: Add SoC callbacks for calibration and clk data recovery

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Message-ID: <CADrjBPputDQWpQZgPiuUDLTWZA83KJEMp-X8ZtXAwt6ivTOG9g@mail.gmail.com>
Date: Mon, 22 Apr 2024 13:39:28 +0100
From: Peter Griffin <peter.griffin@...aro.org>
To: Dan Carpenter <dan.carpenter@...aro.org>
Cc: mturquette@...libre.com, sboyd@...nel.org, robh@...nel.org, 
	krzk+dt@...nel.org, conor+dt@...nel.org, vkoul@...nel.org, kishon@...nel.org, 
	alim.akhtar@...sung.com, avri.altman@....com, bvanassche@....org, 
	s.nawrocki@...sung.com, cw00.choi@...sung.com, jejb@...ux.ibm.com, 
	martin.petersen@...cle.com, chanho61.park@...sung.com, ebiggers@...nel.org, 
	linux-scsi@...r.kernel.org, linux-phy@...ts.infradead.org, 
	devicetree@...r.kernel.org, linux-clk@...r.kernel.org, 
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, tudor.ambarus@...aro.org, 
	andre.draszik@...aro.org, saravanak@...gle.com, willmcvicker@...gle.com
Subject: Re: [PATCH 10/17] phy: samsung-ufs: ufs: Add SoC callbacks for
 calibration and clk data recovery

Hi Dan,

Thanks for the review.

On Wed, 17 Apr 2024 at 10:52, Dan Carpenter <dan.carpenter@...aro.org> wrote:
>
> On Thu, Apr 04, 2024 at 01:25:52PM +0100, Peter Griffin wrote:
> > diff --git a/drivers/phy/samsung/phy-samsung-ufs.c b/drivers/phy/samsung/phy-samsung-ufs.c
> > index c567efafc30f..f57a2f2a415d 100644
> > --- a/drivers/phy/samsung/phy-samsung-ufs.c
> > +++ b/drivers/phy/samsung/phy-samsung-ufs.c
> > @@ -46,7 +46,7 @@ static void samsung_ufs_phy_config(struct samsung_ufs_phy *phy,
> >       }
> >  }
> >
> > -static int samsung_ufs_phy_wait_for_lock_acq(struct phy *phy)
> > +int samsung_ufs_phy_wait_for_lock_acq(struct phy *phy, u8 lane)
> >  {
> >       struct samsung_ufs_phy *ufs_phy = get_samsung_ufs_phy(phy);
> >       const unsigned int timeout_us = 100000;
> > @@ -98,8 +98,15 @@ static int samsung_ufs_phy_calibrate(struct phy *phy)
> >               }
> >       }
> >
> > -     if (ufs_phy->ufs_phy_state == CFG_POST_PWR_HS)
> > -             err = samsung_ufs_phy_wait_for_lock_acq(phy);
> > +     for_each_phy_lane(ufs_phy, i) {
> > +             if (ufs_phy->ufs_phy_state == CFG_PRE_INIT &&
> > +                 ufs_phy->drvdata->wait_for_cal)
> > +                     err = ufs_phy->drvdata->wait_for_cal(phy, i);
> > +
> > +             if (ufs_phy->ufs_phy_state == CFG_POST_PWR_HS &&
> > +                 ufs_phy->drvdata->wait_for_cdr)
> > +                     err = ufs_phy->drvdata->wait_for_cdr(phy, i);
>
> The "err" value is only preserved from the last iteration in this loop.

I'll send a follow up patch for this as it's already applied.

Thanks,

Peter