linux-kernel - Re: [PATCH] dt-bindings: clock: vf610: Add definitions for MTIP L2 switch

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20260123-rework-stank-5a364bf88af6@spud>
Date: Fri, 23 Jan 2026 17:06:49 +0000
From: Conor Dooley <conor@...nel.org>
To: Łukasz Majewski <lukma@...ladev.com>
Cc: Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: clock: vf610: Add definitions for MTIP L2
 switch

On Thu, Jan 22, 2026 at 08:26:03PM +0100, Łukasz Majewski wrote:
> Hi Conor,
> 
> > On Thu, Jan 22, 2026 at 01:58:38PM +0100, Lukasz Majewski wrote:
> > > This patch adds VF610_CLK_ESW and VF610_CLK_ESW_MAC_TAB{0123}
> > > macros definitions for L2 switch.
> > > 
> > > Those definitions describe clocks for MoreThanIP switch IP block;
> > > the switch itself and the MAC address lookup table clocks.
> > > 
> > > Signed-off-by: Lukasz Majewski <lukma@...ladev.com>
> > > ---
> > >  include/dt-bindings/clock/vf610-clock.h | 7 ++++++-
> > >  1 file changed, 6 insertions(+), 1 deletion(-)
> > > 
> > > diff --git a/include/dt-bindings/clock/vf610-clock.h
> > > b/include/dt-bindings/clock/vf610-clock.h index
> > > 373644e46747..b6f7b1745cc2 100644 ---
> > > a/include/dt-bindings/clock/vf610-clock.h +++
> > > b/include/dt-bindings/clock/vf610-clock.h @@ -197,6 +197,11 @@
> > >  #define VF610_CLK_TCON1			188
> > >  #define VF610_CLK_CAAM			189
> > >  #define VF610_CLK_CRC			190
> > > -#define VF610_CLK_END			191  
> > 
> > If end is modifiable, it is removable. If you need the define for the
> > driver, please move it there.
> 
> Could you be more specific regarding your comment?

Values in bindings are immutable, so changing a definition is an ABI
break. If you can break the ABI for this definition, then you should
just remove it instead, because it doesn't represent a clock and it is
liable to change when you information comes to light (e.g. this patch).

> The VF610_CLK_END has now value 191.
> 
> However, there are other clocks in this SoC - like CLK_ESW and
> CLK_MAC_TAB{x} - which were not taken into account earlier.
> 
> What shall be done?
> 
> Shall I remove the VF610_CLK_END entirely?
> 
> Or move to the new "end" (as done with this patch)?

If you need VF610_CLK_END for your driver, rather than just using
(VF610_CLK_ESW_MAC_TAB + 1), please move the definition there.

Download attachment "signature.asc" of type "application/pgp-signature" (229 bytes)