From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=74.125.82.171 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793264410; b=wUpGrhr/kogE7Fyl3YVKXWANOj4Evf6SU5MnzRFd/R8Ni1FUSdbsFtvEbFJ172v0sZZf 2sQLDDPn+l7nQUdE5PgKwMo1kZgLDkXEEpKGAjOLI/Q0vLpbUx7hdlsHSfq0xUssZY6hO 00nYo7vC93ahCgfuhpPa4oFhx61Y1Bj5/J03kV0lD6AnLrkFxLYYZwFTaIjp7nwxJB7p5 dZUrjebvPkI4A+3AC3XEVPcBNGgH+mkKjftzkEEunrtSKig3nNViqtk5hvAnnuscXZ9+a MkoSxjeVoYZ6eQks+FgU4Q9e+avjW+21m7ErJfvFNZoID7BTamQBA/mxzOb2BXG4M+g== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793264410; h=DMARC-Filter:Received:DKIM-Signature:X-Google-DKIM-Signature: X-Forwarded-Encrypted:X-Gm-Message-State:X-Gm-Gg:X-Received:Received: From:To:Cc:Subject:Date:Message-ID:X-Mailer:In-Reply-To:References: MIME-Version:Content-Transfer-Encoding; bh=bas+A2pwMPdYKlr8K9rmQmJzztUh1FCL0UJNjmXGJUs=; b=HG79jfOaIzNFdxFTLlbezfv6u8VtW4NPqzqZ/yrRVYFMJ5VutROp1gfjNsSw+bamjnyX VHefmRpQSih1b9IN+jk8kjbOJ0xHvVLQVRHo5/EDQR8Ubfj14CJl7MKIr5p2e5KvReNzP Bh20mf/bN37ePX8xak+8igGBmthhMEKUPceku7VA8DrAK83An8WKKf8unG8tM7VpdIEfH tS2kOOIMIW7MnY4KvLMNKrOxgOf4XLuW+n37tSEZtDdcFG+F/i+nTvHkJO3yum0qIuR9o Ad9Pa80TF+QBcNw0i2QqhSbAhEbhCjsVVF11HzbLYhNRIfcEmyTdx4mm2hNyjxKPxog== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20260707 header.b=xt7r6i1X; arc=none smtp.remote-ip=74.125.82.171 Received: from mail-dy1-f171.google.com (mail-dy1-f171.google.com [74.125.82.171]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C50F1606A31D for ; Thu, 29 Oct 2026 09:00:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org C50F1606A31D Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20260707 header.b=xt7r6i1X Received: by mail-dy1-f171.google.com with SMTP id 5a478bee46e88-33bf40b0c8bso1178421eec.0 for ; Thu, 29 Oct 2026 02:00:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20260707; t=1793264409; x=1793869209; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=bas+A2pwMPdYKlr8K9rmQmJzztUh1FCL0UJNjmXGJUs=; b=xt7r6i1XB1wkXiieaXlil0rUqSFTNnvo7KXs2PxxFwFRllKLzCjc3lAJO51BFf/aQE xwbahwlJGxoNmGtKzWB5ciUYUa8c3l5IJQsM+quncSLh590orvnt0rglBklJg/4hSSr5 zUPZzBSdVHkEFdUOEXNz8+Iq29pYNSRU0vAv9U/jDNds4FjL0ObkXxPo6wW9U7n8MZge OCHy/7VRQ2HxiSov3eT+s6eDTuNFwtOZq9jcBMY8gKElsY6t9e3T1UTNnMtDHZO16180 l9J76Q96/yivgS/e1DmrD4Nu65RQWYxclEk/7RuWeTqfVqY8JXOD8ciHHvZVApvrwhvR 6rrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1793264409; x=1793869209; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=bas+A2pwMPdYKlr8K9rmQmJzztUh1FCL0UJNjmXGJUs=; b=GGO4MtYwAfccSi1b+vdYElf7C6YFPvsFik6P0ygyVp11eBKSFogaxS5yM2IUekBKPM 4zXbKbMkQn/rTDffKSbS2zWtn3w4s93N7dUv6F57tw2dpIM6onDSNeCzFVOuzRMHxTsa 8ADPaGQjeZqu9daCU4CTv3RVxAPXx6TVhgRipq8XcUvc6ElKRw4fXiJxvT+p1a4MVcwT w5nFEYaqAN7aOn8ZLdpIzy996Hlg1w0C2W/LU7Cffk55e8VHfLsiXnHrEUpa0FnCK0yL qTGB7blvOgRRsEbkRpkepu1jJAG1jwa8WRRUxumAWR8FInTABdkaLErkRTzRCIZsSmhB oFFA== X-Forwarded-Encrypted: i=1; AKwUvByKUd9CXufHbARzNI7M/HjNWi3avLeWoGJmCWveRPMojcab9fPdHvJLzBhmFyNckmZ8ANSH3uliLLkehC7jSQrpHR+CwHc=@vger.kernel.org X-Gm-Message-State: AFq9FYKP5aV0qufnr7KizGWRtSV/kkpNY5DVcMI2da8HgyVQzi7iDNAg rvhVWZFg0969IKrGju6+frY3ZabR1kViOhgInIdzXk7QYCaPT+nC2tI= X-Gm-Gg: AYBFou3VI6MzY+f+6TiE+qSzhHfzoUcAyrATjV1GmRol70hSAy6Jbw8qOSfH9VT+/fd 7E85D6vOBg/n+EsnSboOjuWVDaBS9bYZWd4AdN4E0/2h8NY96SkytxqhalLdMbmK/cx3yWhBIN+ Zyrrr1TF0qTKRHsMfuS91p+23dpjHunbJBLF1wcQjC9/K2l72WrR+3BVVigOR2F+ZjUO9lg3Fbi XNgV/dfbus/1Vn1mnhqS898gEKHGqQw8UxrhzExGmbR4qY0QzjQdsNToBk2WbyqmcPHXpYBZHrd Aa0TpAXerDxIl/33SgPW5BpqGu5nMu6drEPkrDWwXhX1wNyquv/gJrIy6EsfMeSTkT1Ls39s1te YnDOJ13ia6+wBxXpRp47mAurY59PLtmtJ024G/WdVY+4QPTMf7/s1KywiSu5negT/fqrCFL3u8N XYZgkIQz3TigHbC0KMTjFpxR+3JgkS5+LScONDGw2aJAgYeGu/l6oPN3a/UJUJHFIMgex936rOu OvUDrsei4q8MoYlozuQ3SKHl3httE02iJbs99cgxwxcC1JFIUTMHK0YvCYOluMbjXxMUcZQZGIY nXMaPKmiaFQCkeyxhKyUX2lqBmPH4wytXuADSWYNaxTuldqDfd4QMefTVZB3yQ== X-Received: by 2002:a05:7301:d185:b0:369:fe4c:b48f with SMTP id 5a478bee46e88-36a20119d21mr7048294eec.0.1793264408741; Thu, 29 Oct 2026 02:00:08 -0700 (PDT) Received: from at-Standard-PC-Q35-ICH9-2009 ([27.60.20.232]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-36a23641e78sm16497937eec.0.2026.10.29.01.59.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Oct 2026 02:00:08 -0700 (PDT) From: Atharva Tiwari To: Cc: Atharva Tiwari , Bjorn Helgaas , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , "Rafael J. Wysocki" , Len Brown , Linus Walleij , Bartosz Golaszewski , Sven Peter , Janne Grunau , Neal Gompa , Guenter Roeck , Jonathan Cameron , David Lechner , =?UTF-8?q?Nuno=20S=C3=A1?= , Andy Shevchenko , Lee Jones , Pavel Machek , Griffin Kroah-Hartman , Hans de Goede , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Sebastian Reichel , Alexandre Belloni , Wim Van Sebroeck , Jarkko Sakkinen , Mimi Zohar , Roberto Sassu , Dmitry Kasatkin , Eric Snowberg , Paul Moore , James Morris , "Serge E. Hallyn" , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org, linux-gpio@vger.kernel.org, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-hwmon@vger.kernel.org, linux-iio@vger.kernel.org, linux-leds@vger.kernel.org, mfd@lists.linux.dev, platform-driver-x86@vger.kernel.org, linux-pm@vger.kernel.org, linux-rtc@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-integrity@vger.kernel.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [RFC PATCH 09/14] treewide: disable other rtc's in t2 macs Date: Thu, 29 Oct 2026 04:52:06 -0400 Message-ID: <20261029085504.3547-10-atharvatiwarilinuxdev@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20261029085504.3547-1-atharvatiwarilinuxdev@gmail.com> References: <20261029085504.3547-1-atharvatiwarilinuxdev@gmail.com> X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The CMOS RTC and the ACPI TAD clock don't work correctly on T2 Macs. When macsmc-rtc is enabled, turn them off on these machines so macsmc-rtc is the only clock. Signed-off-by: Atharva Tiwari --- drivers/acpi/acpi_tad.c | 4 ++++ drivers/rtc/rtc-cmos.c | 4 ++++ 2 files changed, 8 insertions(+) diff --git a/drivers/acpi/acpi_tad.c b/drivers/acpi/acpi_tad.c index 45459a4ca..a137a39e5 100644 --- a/drivers/acpi/acpi_tad.c +++ b/drivers/acpi/acpi_tad.c @@ -28,6 +28,7 @@ #include #include #include +#include #include #include #include @@ -845,6 +846,9 @@ static int acpi_tad_probe(struct platform_device *pdev) return -ENODEV; } + if (IS_ENABLED(CONFIG_RTC_DRV_MACSMC) && has_apple_t2_chip) + caps &= ~ACPI_TAD_RT; + if (!acpi_has_method(handle, "_PRW")) { dev_info(dev, "Missing _PRW\n"); caps &= ~(ACPI_TAD_AC_WAKE | ACPI_TAD_DC_WAKE); diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c index fa04ece15..bdb436e24 100644 --- a/drivers/rtc/rtc-cmos.c +++ b/drivers/rtc/rtc-cmos.c @@ -33,6 +33,7 @@ #include #include #include +#include #include #include #include @@ -944,6 +945,9 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq) .priv = &cmos_rtc, }; + if (IS_ENABLED(CONFIG_RTC_DRV_MACSMC) && has_apple_t2_chip) + return -ENODEV; + /* there can be only one ... */ if (cmos_rtc.dev) return -EBUSY; -- 2.55.0