linux-kernel - Re: [PATCH v4 0/8] clk: renesas: rzg2l: Add support for power domains

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Date: Wed, 24 Apr 2024 16:33:46 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: ulf.hansson@...aro.org
Cc: Claudiu <claudiu.beznea@...on.dev>, mturquette@...libre.com, robh@...nel.org, 
	krzk+dt@...nel.org, conor+dt@...nel.org, magnus.damm@...il.com, 
	linux-renesas-soc@...r.kernel.org, linux-clk@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-pm@...r.kernel.org, Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH v4 0/8] clk: renesas: rzg2l: Add support for power domains

Hi Ulf,

On Mon, Apr 22, 2024 at 12:54 PM Claudiu <claudiu.beznea@...on.dev> wrote:
> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
>
> Series adds support for power domains on rzg2l driver.
>
> RZ/G2L kind of devices support a functionality called MSTOP (module
> stop/standby). According to hardware manual the module could be switch
> to standby after its clocks are disabled. The reverse order of operation
> should be done when enabling a module (get the module out of standby,
> enable its clocks etc).
>
> In [1] the MSTOP settings were implemented by adding code in driver
> to attach the MSTOP state to the IP clocks. But it has been proposed
> to implement it as power domain. The result is this series.
>
> The DT bindings were updated with power domain IDs (plain integers
> that matches the DT with driver data structures). The current DT
> bindings were updated with module IDs for the modules listed in tables
> with name "Registers for Module Standby Mode" (see HW manual) exception
> being RZ/G3S where, due to the power down functionality, the DDR,
> TZCDDR, OTFDE_DDR were also added.
>
> Domain IDs were added to all SoC specific bindings.
>
> Thank you,
> Claudiu Beznea
>
> Changes in v4:
> - dropped the pwrdn functionality until it is better understanded
> - dropped patch "clk: renesas: rzg2l-cpg: Add suspend/resume
>   support for power domains" from v3; this will be replaced
>   by propertly calling device_set_wakup_path() in serial console
>   driver
> - instantiated the watchdog domain in r8a08g045 clock driver; this
>   allow applying r9a08g045 clock patch w/o affecting watchdog and later,
>   after all good with watchdog patches series at [2], only patch
>   "arm64: dts: renesas: r9a08g045: Update #power-domain-cells = <1>"
>   will need to be applied

Are you happy with this series?  I would like to queue patches 1-7 in
renesas-clk for v6.10 (i.e. this week).

Thank you!

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68korg

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds