From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Saravana Kannan <saravanak@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Kevin Hilman <khilman@kernel.org>,
Ulf Hansson <ulf.hansson@linaro.org>,
Len Brown <len.brown@intel.com>, Len Brown <lenb@kernel.org>,
Pavel Machek <pavel@ucw.cz>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
Marc Zyngier <maz@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux PM list <linux-pm@vger.kernel.org>,
linux-clk <linux-clk@vger.kernel.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Android Kernel Team <kernel-team@android.com>,
Linux-Renesas <linux-renesas-soc@vger.kernel.org>
Subject: Re: [PATCH v4 0/8] Make fw_devlink=on more forgiving
Date: Tue, 16 Feb 2021 13:58:37 +0100 [thread overview]
Message-ID: <CAMuHMdULCQrjba0sM3wUFdPDTB4Txh3LVY-8ACq6P_vFJvk+SA@mail.gmail.com> (raw)
In-Reply-To: <CAGETcx9AZct4h0AdjbNzF5vjoYxT+M+zJ2ddsEN5SV9ALqV48A@mail.gmail.com>
Hi Saravana,
On Mon, Feb 15, 2021 at 10:57 PM Saravana Kannan <saravanak@google.com> wrote:
> On Mon, Feb 15, 2021 at 7:16 AM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> > On Fri, Feb 12, 2021 at 4:00 AM Saravana Kannan <saravanak@google.com> wrote:
> > > On Thu, Feb 11, 2021 at 5:00 AM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> > > > 1. R-Car Gen2 (Koelsch), R-Car Gen3 (Salvator-X(S), Ebisu).
> > > >
> > > > - Commit 2dfc564bda4a31bc ("soc: renesas: rcar-sysc: Mark device
> > > > node OF_POPULATED after init") is no longer needed (but already
> > > > queued for v5.12 anyway)
> > >
> > > Rob doesn't like the proliferation of OF_POPULATED and we don't need
> > > it anymore, so maybe work it out with him? It's a balance between some
> > > wasted memory (struct device(s)) vs not proliferating OF_POPULATED.
> >
> > > > 2. SH/R-Mobile AG5 (kzm9g), APE6 (ape6evm), A1 (armadillo800-eva)
> > > >
> > > > - "PATCH] soc: renesas: rmobile-sysc: Set OF_POPULATED and absorb
> > > > reset handling" is no longer needed
> > > > https://lore.kernel.org/linux-arm-kernel/20210205133319.1921108-1-geert+renesas@glider.be/
> > >
> > > Good to see more evidence that this series is fixing things at a more
> > > generic level.
> >
> > I spoke too soon: if CONFIG_POWER_RESET_RMOBILE=n,
> > booting fails again, as everything is waiting on the system controller,
> > which never becomes available.
> > Rcar-sysc doesn't suffer from this problem, cfr. above.
> > Perhaps because the rmobile-sysc bindings use a hierarchical instead
> > of a linear PM domain description, and thus consumers point to the
> > children of the system controller node?
> > Cfr. system-controller@e6180000 in arch/arm/boot/dts/r8a7740.dtsi.
>
> Ok, I see what's going on. The problem is that the "power domain"
> fwnode being registered is not the node that contains the "compatible"
> property and becomes a device. So this patch[1] is not helping here.
> Fix is to do something like this (to avoid using OF_POPULATED flag and
> breaking reset):
>
> diff --git a/drivers/soc/renesas/rmobile-sysc.c
> b/drivers/soc/renesas/rmobile-sysc.c
> index 9046b8c933cb..b7e66139ef7d 100644
> --- a/drivers/soc/renesas/rmobile-sysc.c
> +++ b/drivers/soc/renesas/rmobile-sysc.c
> @@ -344,6 +344,7 @@ static int __init rmobile_init_pm_domains(void)
> of_node_put(np);
> break;
> }
> + fwnode_dev_initialized(&np->fwnode, true);
> }
>
> put_special_pds();
>
> Can you give it a shot?
Thanks, works. Patch sent
"[PATCH v2] soc: renesas: rmobile-sysc: Mark fwnode when PM domain is added"
https://lore.kernel.org/linux-arm-kernel/20210216123958.3180014-1-geert+renesas@glider.be/
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
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
next prev parent reply other threads:[~2021-02-16 12:59 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20210205222651eucas1p28ef87073dea33c1c5224c14aa203bec5@eucas1p2.samsung.com>
2021-02-05 22:26 ` [PATCH v4 0/8] Make fw_devlink=on more forgiving Saravana Kannan
2021-02-05 22:26 ` [PATCH v4 1/8] driver core: fw_devlink: Detect supplier devices that will never be added Saravana Kannan
2021-02-05 22:26 ` [PATCH v4 2/8] of: property: Don't add links to absent suppliers Saravana Kannan
2021-02-09 21:25 ` Rob Herring
2021-02-05 22:26 ` [PATCH v4 3/8] driver core: Add fw_devlink.strict kernel param Saravana Kannan
2021-02-05 22:26 ` [PATCH v4 4/8] of: property: Add fw_devlink support for optional properties Saravana Kannan
2021-02-09 21:33 ` Rob Herring
2021-02-09 21:54 ` Saravana Kannan
2021-02-10 8:25 ` Geert Uytterhoeven
2021-02-05 22:26 ` [PATCH v4 5/8] driver core: fw_devlink: Handle suppliers that don't use driver core Saravana Kannan
2021-02-05 22:26 ` [PATCH v4 6/8] irqdomain: Mark fwnodes when their irqdomain is added/removed Saravana Kannan
2021-02-05 22:26 ` [PATCH v4 7/8] PM: domains: Mark fwnodes when their powerdomain " Saravana Kannan
2021-02-05 22:26 ` [PATCH v4 8/8] clk: Mark fwnodes when their clock provider " Saravana Kannan
2021-02-08 15:38 ` Rob Herring
2021-02-08 23:34 ` Saravana Kannan
2021-02-10 11:44 ` [PATCH] clk: Mark fwnodes when their clock provider is added Tudor Ambarus
2021-02-10 11:44 ` Tudor Ambarus
2021-02-11 13:00 ` Greg KH
2021-02-13 0:37 ` Stephen Boyd
[not found] ` <CGME20210325133159eucas1p297b769beb681743fb32d362a86cc6e3e@eucas1p2.samsung.com>
2021-03-25 13:31 ` Marek Szyprowski
2021-03-25 15:47 ` Geert Uytterhoeven
2021-03-25 18:25 ` Nicolas Saenz Julienne
2021-03-26 18:13 ` Stephen Boyd
2021-03-26 18:29 ` Geert Uytterhoeven
2021-04-21 3:26 ` Guenter Roeck
2021-04-21 7:00 ` Saravana Kannan
2021-02-10 19:13 ` Saravana Kannan
2021-03-30 15:42 ` Guenter Roeck
2021-03-30 16:26 ` Saravana Kannan
[not found] ` <161317679292.1254594.15797939257637374295@swboyd.mtv.corp.google.com>
2021-02-14 21:15 ` [PATCH v4 8/8] clk: Mark fwnodes when their clock provider is added/removed Saravana Kannan
2021-02-06 2:45 ` [PATCH v4 0/8] Make fw_devlink=on more forgiving Saravana Kannan
2021-02-06 19:41 ` Geert Uytterhoeven
2021-02-06 20:47 ` Saravana Kannan
2021-02-08 8:40 ` Marek Szyprowski
2021-02-08 23:57 ` Saravana Kannan
2021-02-10 8:19 ` Tudor.Ambarus
2021-02-10 8:54 ` Saravana Kannan
2021-02-10 10:02 ` Tudor.Ambarus
2021-02-10 19:14 ` Saravana Kannan
2021-02-11 13:00 ` Geert Uytterhoeven
2021-02-11 13:05 ` Geert Uytterhoeven
2021-02-12 2:59 ` Saravana Kannan
2021-02-12 8:14 ` Geert Uytterhoeven
2021-02-12 20:57 ` Saravana Kannan
2021-02-15 12:38 ` Geert Uytterhoeven
2021-02-15 21:26 ` Saravana Kannan
2021-02-16 8:05 ` Geert Uytterhoeven
2021-02-16 18:48 ` Saravana Kannan
2021-02-16 20:31 ` Geert Uytterhoeven
2021-02-17 23:57 ` Saravana Kannan
2021-02-25 9:21 ` Geert Uytterhoeven
2021-02-15 15:16 ` Geert Uytterhoeven
2021-02-15 21:57 ` Saravana Kannan
2021-02-16 12:58 ` Geert Uytterhoeven [this message]
2021-02-15 11:19 ` Geert Uytterhoeven
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