netdev - Re: [PATCH] net: stmmac: Initialize MAC_ONEUS_TIC

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Message-Id: 
 <168368702069.23144.12939098876302994192.git-patchwork-notify@kernel.org>
Date: Wed, 10 May 2023 02:50:20 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Marek Vasut <marex@...x.de>
Cc: netdev@...r.kernel.org, davem@...emloft.net, alexandre.torgue@...s.st.com,
 edumazet@...gle.com, francesco.dolcini@...adex.com, peppe.cavallaro@...com,
 hws@...x.de, kuba@...nel.org, joabreu@...opsys.com,
 marcel.ziswiler@...adex.com, mcoquelin.stm32@...il.com, pabeni@...hat.com,
 linux-arm-kernel@...ts.infradead.org,
 linux-stm32@...md-mailman.stormreply.com
Subject: Re: [PATCH] net: stmmac: Initialize MAC_ONEUS_TIC_COUNTER register

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Sun,  7 May 2023 01:58:45 +0200 you wrote:
> Initialize MAC_ONEUS_TIC_COUNTER register with correct value derived
> from CSR clock, otherwise EEE is unstable on at least NXP i.MX8M Plus
> and Micrel KSZ9131RNX PHY, to the point where not even ARP request can
> be sent out.
> 
> i.MX 8M Plus Applications Processor Reference Manual, Rev. 1, 06/2021
> 11.7.6.1.34 One-microsecond Reference Timer (MAC_ONEUS_TIC_COUNTER)
> defines this register as:
> "
> This register controls the generation of the Reference time (1 microsecond
> tic) for all the LPI timers. This timer has to be programmed by the software
> initially.
> ...
> The application must program this counter so that the number of clock cycles
> of CSR clock is 1us. (Subtract 1 from the value before programming).
> For example if the CSR clock is 100MHz then this field needs to be programmed
> to value 100 - 1 = 99 (which is 0x63).
> This is required to generate the 1US events that are used to update some of
> the EEE related counters.
> "
> 
> [...]

Here is the summary with links:
  - net: stmmac: Initialize MAC_ONEUS_TIC_COUNTER register
    https://git.kernel.org/netdev/net/c/8efbdbfa9938

You are awesome, thank you!
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