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[2003:e4:1f29:1e00:f22f:74ff:fe1f:3a53]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-45eaa7cf23bsm715799f8f.5.2026.05.21.00.52.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 May 2026 00:52:05 -0700 (PDT) Date: Thu, 21 May 2026 09:52:03 +0200 From: Thierry Reding To: Diogo Ivo Cc: Mark Rutland , Lorenzo Pieralisi , Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thierry Reding , Jonathan Hunter , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-tegra@vger.kernel.org Subject: Re: [PATCH 3/4] mfd: max77620: override PSCI poweroff handler on Pixel C Message-ID: References: <20260514-smaug-poweroff-v1-0-30f9a4688966@tecnico.ulisboa.pt> <20260514-smaug-poweroff-v1-3-30f9a4688966@tecnico.ulisboa.pt> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="krmmkipqxg3oqi3l" Content-Disposition: inline In-Reply-To: <20260514-smaug-poweroff-v1-3-30f9a4688966@tecnico.ulisboa.pt> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260521_005211_488049_EC70A101 X-CRM114-Status: GOOD ( 12.93 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --krmmkipqxg3oqi3l Content-Type: text/plain; protected-headers=v1; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: [PATCH 3/4] mfd: max77620: override PSCI poweroff handler on Pixel C MIME-Version: 1.0 On Thu, May 14, 2026 at 04:47:21PM +0200, Diogo Ivo wrote: > On Pixel C, shutdown must be handled by the MAX77620 PMIC rather > than the PSCI SYSTEM_OFF call, whose firmware implementation is: >=20 > __dead2 void tegra_system_off(void) > { > ERROR("Tegra System Off: operation not handled.\n"); > panic(); > } Ugh... sounds very familiar. We have similar stub implementations on Jetson TX1 and/or Nano, if I remember correctly. Luckily newer platforms seem to have proper implementations for these. Thanks for doing this. I might want to take inspiration from this for these older Jetson platforms. 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