linux-kernel - Re: [PATCH net-next v1 14/14] net: phy: nxp-c45-tja11xx: timestamp reading workaround for TJA1120

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Message-ID: <7eda291f-1e2a-1af6-ae25-785b6eccc281@oss.nxp.com>
Date:   Mon, 19 Jun 2023 12:46:22 +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 14/14] net: phy: nxp-c45-tja11xx: timestamp
 reading workaround for TJA1120


On 19.06.2023 11:58, Horatiu Vultur wrote:
> The 06/16/2023 16:53, Radu Pirea (NXP OSS) wrote:
> 
> Hi Radu,
> 
>>
>> On TJA1120 engineering samples, the new timestamp is stuck in the FIFO.
>> If the MORE_TS bit is set and the VALID bit is not set, we know that we
>> have a timestamp in the FIFO but not in the buffer.
>>
>> To move the new timestamp in the buffer registers, the current
>> timestamp(which is invalid) is unlocked by writing any of the buffer
>> registers.
> 
> Shouldn't this be split and merged in patch 9 and patch 10?
> As those two patches introduced this functions with issues.
> 
Ok. I will merge the workarounds in patches 9 and 12 if it looks better 
to you. The intention here was to implement the timestamp reading 
sequence in a clean way and to add the workarounds later.
>>
>>
> 
> --
> /Horatiu

-- 
Radu P.