netdev - Re: [PATCH] net: dsa: mt7530: disable LEDs before reset

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Date: Tue, 12 Mar 2024 02:03:21 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Justin Swartz <justin.swartz@...ingedge.co.za>
Cc: Arınç ÜNAL <arinc.unal@...nc9.com>,
	Daniel Golle <daniel@...rotopia.org>,
	DENG Qingfang <dqfext@...il.com>,
	Sean Wang <sean.wang@...iatek.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Vladimir Oltean <olteanv@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH] net: dsa: mt7530: disable LEDs before reset

> (b) When a cable attached to an active peer is connected to
> Port 3 (lan4) before reset, the incorrect crystal frequency
> selection (0b11 = 25MHz) always occurs:
> 
>               [7]      [8]     [10]    [12]
>               :        :       :       :
>               _________         ______________________________________
> ESW_P4_LED_0           |_______|
>               _________         _______
> ESW_P3_LED_0           |_______|       |______________________________
> 
>                         :     : :     :
>                         [9]...: [11]..:
> 
>  [7] Port 4 LED Off. Port 3 LED Off.
>  [8] Signals inverted. (reset_control_assert; reset_control_deassert)
>  [9] Period of 320 usec.
> [10] Signals inverted.
> [11] Period of 300 usec.
> [12] Signals reflect the bootstrapped configuration.

Shame the patch has already been accepted. The text in this email
would of made a cool commit message.

      Andrew