netdev - Re: [PATCH iwl-next 7/7] ice: Enable 1PPS out from CGU for E825C products

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Message-ID: <20240702105615.GG598357@kernel.org>
Date: Tue, 2 Jul 2024 11:56:15 +0100
From: Simon Horman <horms@...nel.org>
To: Przemek Kitszel <przemyslaw.kitszel@...el.com>
Cc: Karol Kolacinski <karol.kolacinski@...el.com>,
	intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
	anthony.l.nguyen@...el.com,
	Sergey Temerkhanov <sergey.temerkhanov@...el.com>,
	Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>
Subject: Re: [PATCH iwl-next 7/7] ice: Enable 1PPS out from CGU for E825C
 products

On Mon, Jul 01, 2024 at 05:08:09PM +0200, Przemek Kitszel wrote:
> On 7/1/24 15:27, Simon Horman wrote:
> > On Thu, Jun 27, 2024 at 05:09:31PM +0200, Karol Kolacinski wrote:
> > > From: Sergey Temerkhanov <sergey.temerkhanov@...el.com>
> > > 
> > > Implement 1PPS signal enabling/disabling in CGU. The amplitude is
> > > always the maximum in this implementation
> > > 
> > > Reviewed-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>
> > > Signed-off-by: Sergey Temerkhanov <sergey.temerkhanov@...el.com>
> > > Co-developed-by: Karol Kolacinski <karol.kolacinski@...el.com>
> > > Signed-off-by: Karol Kolacinski <karol.kolacinski@...el.com>
> > 
> > ...
> > 
> > > diff --git a/drivers/net/ethernet/intel/ice/ice_ptp_hw.c b/drivers/net/ethernet/intel/ice/ice_ptp_hw.c
> > > index 07ecf2a86742..fa7cf8453b88 100644
> > > --- a/drivers/net/ethernet/intel/ice/ice_ptp_hw.c
> > > +++ b/drivers/net/ethernet/intel/ice/ice_ptp_hw.c
> > > @@ -661,6 +661,27 @@ static int ice_cfg_cgu_pll_e825c(struct ice_hw *hw,
> > >   	return 0;
> > >   }
> > > +#define ICE_ONE_PPS_OUT_AMP_MAX 3
> > > +
> > > +/**
> > > + * ice_cgu_ena_pps_out - Enable/disable 1PPS output
> > > + * @hw: pointer to the HW struct
> > > + * @ena: Enable/disable 1PPS output
> > 
> > Please include a "Returns: " or "Return: " section in the kernel doc
> > for functions that have a return value.
> 
> last time I have checked only the singular "Return:" was supported (aka
> non-complained) by kdoc checker on W=2 builds

Yes, agreed.

My point was that the kernel document should have a (correct :)
section to document the return value.

> 
> > 
> > NIPA has recently got more picky about this.
> > Flagged by kernel-doc -none --Warn
> > 
> > > + */
> > > +int ice_cgu_ena_pps_out(struct ice_hw *hw, bool ena)
> > > +{
> > > +	union nac_cgu_dword9 dw9;
> > > +	int err;
> > > +
> > > +	err = ice_read_cgu_reg_e82x(hw, NAC_CGU_DWORD9, &dw9.val);
> > > +	if (err)
> > > +		return err;
> > > +
> > > +	dw9.one_pps_out_en = ena;
> > > +	dw9.one_pps_out_amp = ena * ICE_ONE_PPS_OUT_AMP_MAX;
> > > +	return ice_write_cgu_reg_e82x(hw, NAC_CGU_DWORD9, dw9.val);
> > > +}
> > > +
> > >   /**
> > >    * ice_cfg_cgu_pll_dis_sticky_bits_e82x - disable TS PLL sticky bits
> > >    * @hw: pointer to the HW struct
> > 
> > ...
> > 
>