From nobody Sun Feb 8 05:37:11 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 235C2274B51; Sat, 17 Jan 2026 17:25:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768670731; cv=none; b=nZeUAgigaT8R5t9x9D1OSCGAtTHpdy8zt8tVZn5AT7DoidMaoCEegS7ZeFc7RsjbJGO5JQe1mdIAGdDQ2FmKwuDCBnoRVIHKLm2V9Z/M6WlhNLhPnsI8ZX2R1ILim1WQCzIQrnjDYVmeuZNsQEaBE4nJsVPMyyUwXX+p9DBwifo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768670731; c=relaxed/simple; bh=4V35tKqw5KQHMXyZcaINOZDMyewJrJBwf6xXsdEQV0I=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=SglfMH1YYeWYex/O5/+wqHU53pUc/QR4/UnCRwm4cEe8d3HdsL/hNnU4S+3wwS/AYrnHZMz9ZZ0gcpM5VGhqcoF2u4y5gOuw42rs+sQGmuLjurgM1yLs2Gvyz1XVz6QKD6FB4Ks5kM2T+T3FbnNA/SjDZfU9VOdvI6+laWLu+eE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rYz3D+er; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="rYz3D+er" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8A7E1C4CEF7; Sat, 17 Jan 2026 17:25:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768670730; bh=4V35tKqw5KQHMXyZcaINOZDMyewJrJBwf6xXsdEQV0I=; h=From:Date:Subject:To:Cc:From; b=rYz3D+erMRpxk2pzST5vBLjNjFsQ9n9O/kXyFNR0KhOOY+mSG6am/Bu7MJcEPJZYZ VfUT2bB6u975c0AWASxTa7LwldPKj/2xE3cLyMzDUlVSPH52wRsCopTM/8o4E+Cd7p O9cD5ppR5uLf/pchTFgnXJBGgv60qOl9UWgFK5B/XqNVucfDociJWjH8tHVagitYF9 U8iW8F22l717GV3JBi7IZGYblnr1GLjrQtH153+BqlRbhpWG9Hi0yqtOTfePfhJe7s ySqK7jh9wA5P7BYerhLGNYl1Y0dt+VP6VFEp0DqU5EWNUct+elIiOW2sPMF72aHIbS LVCBmfVsdKFSA== From: Sven Peter Date: Sat, 17 Jan 2026 18:24:44 +0100 Subject: [PATCH] soc: apple: rtkit: Add function to poweroff Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260117-apple-rtkit-poweroff-v1-1-6fbe8145e965@kernel.org> X-B4-Tracking: v=1; b=H4sIANvFa2kC/x3MTQqEMAxA4atI1gYaf2GuMrhoNZ0Jii2pqCDe3 eLyW7x3QWIVTvApLlDeJUlYM6gsYPzb9ccoUzZUpuoMUY82xoVRt1k2jOFgDd6jG2vnyDeWTAs 5jcpeznf7He77ASauEJlmAAAA X-Change-ID: 20260117-apple-rtkit-poweroff-bc3bb1f4a105 To: Janne Grunau , Neal Gompa Cc: asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Sven Peter X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2139; i=sven@kernel.org; h=from:subject:message-id; bh=4V35tKqw5KQHMXyZcaINOZDMyewJrJBwf6xXsdEQV0I=; b=owGbwMvMwCXmIlirolUq95LxtFoSQ2b20QfzzgRv9XyvfZBHuLLr8W49fSX1nNralIkzZdapP /x95nxvRykLgxgXg6yYIsv2/famTx6+EVy66dJ7mDmsTCBDGLg4BWAi0f8Z/sr1/tt3XveogtnL WZ/K352YGJHudSp2l/hPzgDDbq/iD+wM/13cZAsua2o5bDA8YvBA6bm8GZPeBM/2UJdPwbmxiSl LuAA= X-Developer-Key: i=sven@kernel.org; a=openpgp; fpr=A1E3E34A2B3C820DBC4955E5993B08092F131F93 Add a function to put a co-processor into the lowest possible power state from which recovery usually isn't possible without a full SoC reset. This is required for the USB4/Thunderbolt co-processors which can be restarted since the entire USB4 root complex can be completely reset independently of the rest of the SoC. Signed-off-by: Sven Peter Reviewed-by: Janne Grunau --- drivers/soc/apple/rtkit.c | 17 +++++++++++++++++ include/linux/soc/apple/rtkit.h | 7 +++++++ 2 files changed, 24 insertions(+) diff --git a/drivers/soc/apple/rtkit.c b/drivers/soc/apple/rtkit.c index b8d4da147d23f7e99e76eea314e4d976cddbd1c6..381faaf74d5982163d2c44d1e2c= 6e0ddad07bd73 100644 --- a/drivers/soc/apple/rtkit.c +++ b/drivers/soc/apple/rtkit.c @@ -851,6 +851,23 @@ int apple_rtkit_shutdown(struct apple_rtkit *rtk) } EXPORT_SYMBOL_GPL(apple_rtkit_shutdown); =20 +int apple_rtkit_poweroff(struct apple_rtkit *rtk) +{ + int ret; + + ret =3D apple_rtkit_set_ap_power_state(rtk, + APPLE_RTKIT_PWR_STATE_OFF); + if (ret) + return ret; + + ret =3D apple_rtkit_set_iop_power_state(rtk, APPLE_RTKIT_PWR_STATE_OFF); + if (ret) + return ret; + + return apple_rtkit_reinit(rtk); +} +EXPORT_SYMBOL_GPL(apple_rtkit_poweroff); + int apple_rtkit_idle(struct apple_rtkit *rtk) { int ret; diff --git a/include/linux/soc/apple/rtkit.h b/include/linux/soc/apple/rtki= t.h index 736f530180179bd144cf85eb0f0bd93844d7188a..bda3c528b51553c13f7fe5685ab= 60f7fc675361b 100644 --- a/include/linux/soc/apple/rtkit.h +++ b/include/linux/soc/apple/rtkit.h @@ -125,6 +125,13 @@ int apple_rtkit_wake(struct apple_rtkit *rtk); */ int apple_rtkit_shutdown(struct apple_rtkit *rtk); =20 +/* + * Put the co-processor into the lowest power state. Note that it usually + * is not possible to recover from this state without a full SoC reset. + */ + +int apple_rtkit_poweroff(struct apple_rtkit *rtk); + /* * Put the co-processor into idle mode */ --- base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8 change-id: 20260117-apple-rtkit-poweroff-bc3bb1f4a105 Best regards, --=20 Sven Peter