From: Guenter Roeck <linux@roeck-us.net>
To: Biju Das <biju.das.jz@bp.renesas.com>
Cc: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>,
Geert Uytterhoeven <geert+renesas@glider.be>,
"linux-watchdog@vger.kernel.org" <linux-watchdog@vger.kernel.org>,
"sashiko-reviews@lists.linux.dev"
<sashiko-reviews@lists.linux.dev>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"conor+dt@kernel.org" <conor+dt@kernel.org>,
wsa+renesas <wsa+renesas@sang-engineering.com>,
"robh@kernel.org" <robh@kernel.org>,
Fabrizio Castro <fabrizio.castro.jz@renesas.com>,
Linux-Renesas <linux-renesas-soc@vger.kernel.org>
Subject: Re: [PATCH v6 6/8] watchdog: rzv2h: Add syscon support for WDTDCR
Date: Thu, 24 Sep 2026 21:50:51 -0700 [thread overview]
Message-ID: <2d32d7f1-f87b-45b3-9ccd-95e9773ca658@roeck-us.net> (raw)
In-Reply-To: <TY3PR01MB11346CC8B3C7374C293E0F3EB86802@TY3PR01MB11346.jpnprd01.prod.outlook.com>
On Fri, Sep 25, 2026 at 04:13:24AM +0000, Biju Das wrote:
> Hi Geunter/Prabhakar,
>
...
> Just a question,
> For automatic software upgrade, if the reboot using PSCI fails, what is the fallback
> for reboot, reset the board?
That seems to be a bit theoretic. The reason for having the ability to
register multiple restart handlers is not to have failure fallbacks,
but to have fallbacks if preferred restart handlers are not available.
If the PSCI restart handler is present, it is expected to work.
That is why it has higher priority. The idea is to use the highest
priority restart handler, not to try one after another.
Sure, the failure fallback works as well, but that doesn't mean
that fallbacks should be provided just to provide fallbacks.
If you claim that the PSCI restart handler does not work on this
system, provide evicence, and we can discuss this further.
Thanks,
Guenter
next prev parent reply other threads:[~2026-09-25 4:50 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-23 10:40 [PATCH v6 0/8] Add syscon support for Renesas WDT driver Prabhakar
2026-09-23 10:40 ` [PATCH v6 1/8] watchdog: rzv2h: Use pm_runtime_put_sync() Prabhakar
2026-09-23 10:40 ` [PATCH v6 2/8] watchdog: rzv2h: Drop enabling clocks in the restart handler Prabhakar
2026-09-23 10:40 ` [PATCH v6 3/8] watchdog: rzv2h: Drop WDTRCR_RSTIRQS define Prabhakar
2026-09-23 10:40 ` [PATCH v6 4/8] watchdog: rzv2h: Propagate WDTDCR access errors Prabhakar
2026-09-23 10:48 ` sashiko-bot
2026-09-23 21:17 ` Guenter Roeck
2026-09-24 12:59 ` Lad, Prabhakar
2026-09-23 21:19 ` Guenter Roeck
2026-09-23 10:40 ` [PATCH v6 5/8] watchdog: rzv2h: Convert WDTDCR handling to regmap Prabhakar
2026-09-23 10:40 ` [PATCH v6 6/8] watchdog: rzv2h: Add syscon support for WDTDCR Prabhakar
2026-09-23 10:52 ` sashiko-bot
2026-09-24 13:44 ` Lad, Prabhakar
2026-09-24 21:48 ` Guenter Roeck
2026-09-25 4:13 ` Biju Das
2026-09-25 4:50 ` Guenter Roeck [this message]
2026-09-25 5:11 ` Biju Das
2026-09-25 9:06 ` Lad, Prabhakar
2026-09-25 9:09 ` Geert Uytterhoeven
2026-09-25 9:20 ` Lad, Prabhakar
2026-09-25 12:24 ` Lad, Prabhakar
2026-09-25 13:41 ` Guenter Roeck
2026-09-23 10:40 ` [PATCH v6 7/8] arm64: dts: renesas: r9a09g077: Use CPG/MSSR syscon for WDTDCR access Prabhakar
2026-09-23 11:05 ` sashiko-bot
2026-09-23 10:40 ` [PATCH v6 8/8] arm64: dts: renesas: r9a09g087: " Prabhakar
2026-09-23 10:53 ` sashiko-bot
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