linux-kernel - Re: [PATCH] clk: vf610: Add support for the Ethernet switch clocks

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Message-ID: <20260123141252.3250c6ce@wsk>
Date: Fri, 23 Jan 2026 14:12:52 +0100
From: Łukasz Majewski <lukma@...ladev.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: Michael Turquette <mturquette@...libre.com>, Abel Vesa
 <abelvesa@...nel.org>, Peng Fan <peng.fan@....com>, Stephen Boyd
 <sboyd@...nel.org>, Shawn Guo <shawnguo@...nel.org>, Sascha Hauer
 <s.hauer@...gutronix.de>, Pengutronix Kernel Team <kernel@...gutronix.de>,
 Fabio Estevam <festevam@...il.com>, linux-clk@...r.kernel.org,
 imx@...ts.linux.dev, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, Jakub Kicinski <kuba@...nel.org>
Subject: Re: [PATCH] clk: vf610: Add support for the Ethernet switch clocks

Hi Andrew,

> Hi Andrew,
> 
> > On Thu, Jan 22, 2026 at 02:06:49PM +0100, Lukasz Majewski wrote:  
> > > The vf610 device has built in the MoreThanIP L2 switch. For proper
> > > operation it is required to enable ESW and MAC table lookup
> > > clocks.
> > > 
> > > The MAC table spans from 0x400E_C000 for 0x4000 and it is
> > > necessary to provide clocks for each AIPS1-"slot", which size is
> > > 0x1000 (hence four separate entries).
> > > 
> > > Those can be enabled via clock gating CCM_CCGR10 register
> > > (0x4006_B068).    
> > 
> > Sorry, i lost track of the state of the switch driver.  
> 
> New year, new MTIP L2 switch patches in preparation :-)
> 

Just to share:
https://github.com/lmajewski/linux-imx28-l2switch/commits/vf610-linux-6.6.y-mtipl2sw

The driver has been tested (after backporting) on v6.6 LTS with
PREEMPT_RT.

Moreover, I've added support for switchdev.

> > Is there also a
> > patch to add consumers of these clocks?  
> 
> In short - this patch set is a preparatory one for vf610 SoC support
> of the MTIP L2 switch.
> 
> Those changes describe more thoroughly the clock subsystem of this
> SoC.
> 
> >   
> > > Signed-off-by: Lukasz Majewski <lukma@...ladev.com>    
> > 
> > Reviewed-by: Andrew Lunn <andrew@...n.ch>
> > 
> >     Andrew  
> 



-- 
Best regards,

Lukasz Majewski

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