linux-kernel - Re: [PATCH net-next v1 08/14] net: phy: nxp-c45-tja11xx: enable LTC sampling on both ext

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Date:   Mon, 19 Jun 2023 11:36:24 +0300
From:   "Radu Pirea (OSS)" <radu-nicolae.pirea@....nxp.com>
To:     Horatiu Vultur <horatiu.vultur@...rochip.com>
Cc:     andrew@...n.ch, hkallweit1@...il.com, linux@...linux.org.uk,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, richardcochran@...il.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        sebastian.tobuschat@....com
Subject: Re: [PATCH net-next v1 08/14] net: phy: nxp-c45-tja11xx: enable LTC
 sampling on both ext_ts edges

On 19.06.2023 11:10, Horatiu Vultur wrote:
> The 06/16/2023 16:53, Radu Pirea (NXP OSS) wrote:
>>
>> +static void nxp_c45_set_rising_or_falling(struct phy_device *phydev,
>> +                                         struct ptp_extts_request *extts)
>> +{
>> +       /* Some enable request has only the PTP_ENABLE_FEATURE flag set and in
>> +        * this case external ts should be enabled on rising edge.
>> +        */
>> +       if (extts->flags & PTP_RISING_EDGE ||
>> +           extts->flags == PTP_ENABLE_FEATURE)
>> +               phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1,
>> +                                  VEND1_PTP_CONFIG, EXT_TRG_EDGE);
> 
> With this patch, are you not changing the behaviour for TJA1103?

Yes. The behaviour is changed. If extts->flags == PTP_ENABLE_FEATURE, 
the ext ts will be enabled on falling edge.

> In the way, before there was not check for extts->flags ==
> PTP_ENABLE_FEATURE and now if that is set you configure to trigger on
> raising edge. If that is the case, shouldn't be this in a different
> patch?

You are right. I will split this patch in two. One that enables ext ts 
on rising edge when extts->flags == PTP_ENABLE_FEATURE and another one 
with TJA1120 changes.

> 
>> +
>> +       if (extts->flags & PTP_FALLING_EDGE)
>> +               phy_set_bits_mmd(phydev, MDIO_MMD_VEND1,
>> +                                VEND1_PTP_CONFIG, EXT_TRG_EDGE);
>> +}
>> +
> 
> 
> --
> /Horatiu

-- 
Radu P.