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From: "Rafael J. Wysocki" <rafael@kernel.org>
To: Linux ACPI <linux-acpi@vger.kernel.org>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Danilo Krummrich <dakr@kernel.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH v0 6/6] ACPI: TAD: Update the driver description comment
Date: Sun, 22 Feb 2026 15:19:48 +0100	[thread overview]
Message-ID: <2042722.PYKUYFuaPT@rafael.j.wysocki> (raw)
In-Reply-To: <4727679.LvFx2qVVIh@rafael.j.wysocki>

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Update the preamble comment describing the driver to match the code
after previous changes along with the copyright information.

No functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/acpi_tad.c |   13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

--- a/drivers/acpi/acpi_tad.c
+++ b/drivers/acpi/acpi_tad.c
@@ -2,12 +2,10 @@
 /*
  * ACPI Time and Alarm (TAD) Device Driver
  *
- * Copyright (C) 2018 Intel Corporation
+ * Copyright (C) 2018 - 2026 Intel Corporation
  * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
  *
- * This driver is based on Section 9.18 of the ACPI 6.2 specification revision.
- *
- * It only supports the system wakeup capabilities of the TAD.
+ * This driver is based on ACPI 6.6, Section 9.17.
  *
  * Provided are sysfs attributes, available under the TAD platform device,
  * allowing user space to manage the AC and DC wakeup timers of the TAD:
@@ -18,6 +16,11 @@
  *
  * The wakeup events handling and power management of the TAD is expected to
  * be taken care of by the ACPI PM domain attached to its platform device.
+ *
+ * If the TAD supports the get/set real time features, as indicated by the
+ * capability mask returned by _GCP under the TAD object, additional sysfs
+ * attributes are created allowing the real time to be set and read and an RTC
+ * class device is registered under the TAD platform device.
  */
 
 #include <linux/acpi.h>
@@ -32,7 +35,7 @@ MODULE_DESCRIPTION("ACPI Time and Alarm
 MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Rafael J. Wysocki");
 
-/* ACPI TAD capability flags (ACPI 6.2, Section 9.18.2) */
+/* ACPI TAD capability flags (ACPI 6.6, Section 9.17.2) */
 #define ACPI_TAD_AC_WAKE	BIT(0)
 #define ACPI_TAD_DC_WAKE	BIT(1)
 #define ACPI_TAD_RT		BIT(2)




      parent reply	other threads:[~2026-02-22 14:21 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-22 14:14 [PATCH v0 0/6] ACPI: TAD: Assorted improvements and RTC class device interface Rafael J. Wysocki
2026-02-22 14:15 ` [PATCH v0 1/6] ACPI: TAD: Create one attribute group Rafael J. Wysocki
2026-02-22 14:16 ` [PATCH v0 2/6] ACPI: TAD: Use __free() for cleanup in time_store() Rafael J. Wysocki
2026-02-22 14:17 ` [PATCH v0 3/6] ACPI: TAD: Update RT data validation checking Rafael J. Wysocki
2026-02-22 14:17 ` [PATCH v0 4/6] ACPI: TAD: Clear unused RT data in acpi_tad_set_real_time() Rafael J. Wysocki
2026-02-22 14:18 ` [PATCH v0 5/6] ACPI: TAD: Add RTC class device interface Rafael J. Wysocki
2026-02-27 10:37   ` Alexandre Belloni
2026-02-27 11:26     ` Rafael J. Wysocki
2026-02-22 14:19 ` Rafael J. Wysocki [this message]

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