linux-kernel - RE: [PATCH 0/4] Add RZ/G3E GPT clocks and resets

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

Message-ID:
 <TY3PR01MB113467CB44FFF5F65038153EA8633A@TY3PR01MB11346.jpnprd01.prod.outlook.com>
Date: Wed, 20 Aug 2025 06:35:25 +0000
From: Biju Das <biju.das.jz@...renesas.com>
To: geert <geert@...ux-m68k.org>, biju.das.au <biju.das.au@...il.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>, magnus.damm
	<magnus.damm@...il.com>, "linux-clk@...r.kernel.org"
	<linux-clk@...r.kernel.org>, "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "linux-renesas-soc@...r.kernel.org"
	<linux-renesas-soc@...r.kernel.org>, Prabhakar Mahadev Lad
	<prabhakar.mahadev-lad.rj@...renesas.com>
Subject: RE: [PATCH 0/4] Add RZ/G3E GPT clocks and resets

Hi Geert,

Thanks for the feedback.

> -----Original Message-----
> From: Geert Uytterhoeven <geert@...ux-m68k.org>
> Sent: 19 August 2025 16:11
> Subject: Re: [PATCH 0/4] Add RZ/G3E GPT clocks and resets
> 
> Hi Biju,
> 
> On Thu, 14 Aug 2025 at 14:48, Biju <biju.das.au@...il.com> wrote:
> > From: Biju Das <biju.das.jz@...renesas.com>
> >
> > The RZ/G3E GPT IP has multiple clocks and resets. It has bus and core
> > clocks. The bus clock is module clock and core clock is sourced from
> > the bus clock. So add support for module clock as parent reusing the
> > existing rzv2h_cpg_fixed_mod_status_clk_register().
> 
> Thanks for your series!
> 
> > Biju Das (4):
> >   clk: renesas: rzv2h: Refactor
> >     rzv2h_cpg_fixed_mod_status_clk_register()
> >   clk: renesas: rzv2h: Add support for parent mod clocks
> >   dt-bindings: clock: renesas,r9a09g047-cpg: Add GPT core clocks
> >   clk: renesas: r9a09g047: Add GPT clocks and resets
> 
> I think you are overcomplicating: according to the clock system diagram and clock list sheets,
> gpt_[01]_pclk_sfr and gpt_[01]_clks_gpt_sfr are really the same clocks (the same is true for rsci_[0-
> 9]_pclk and rsci_[0-9]_pclk_sfr).

Thanks for correcting me. I got confused with CGC=GPT_0_pclk_sfr for the core clock
that made me to complicate the clks.

> So you can just describe gpt_[01]_pclk_sfr as normal module clocks, and use them for both the core and
> bus blocks in DT, e.g.
> 
>     clocks = <&cpg CPG_MOD 0x31>, <&cpg CPG_MOD 0x31>;
>     clock-names = "core", "bus";
> 
> Do you agree?

Yes, I agree.

Cheers,
Biju