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From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: Jean Delvare <jdelvare@suse.de>, "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Len Brown <lenb@kernel.org>,
	linux-acpi@vger.kernel.org,
	Wim Van Sebroeck <wim@linux-watchdog.org>,
	Guenter Roeck <linux@roeck-us.net>,
	linux-watchdog@vger.kernel.org,
	Robert Moore <robert.moore@intel.com>,
	Erik Kaneda <erik.kaneda@intel.com>,
	Tom Abraham <tabraham@suse.com>,
	Mika Westerberg <mika.westerberg@linux.intel.com>
Subject: [PATCH v2 1/3] ACPICA: Introduce ACPI_ACCESS_BYTE_WIDTH() macro
Date: Wed, 12 Feb 2020 17:59:39 +0300
Message-ID: <20200212145941.32914-2-mika.westerberg@linux.intel.com> (raw)
In-Reply-To: <20200212145941.32914-1-mika.westerberg@linux.intel.com>

Sometimes it is useful to find the access_width field value in bytes and
not in bits so add a helper that can be used for this purpose.

Suggested-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
---
 include/acpi/actypes.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index a2583c2bc054..4defed58ea33 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -532,11 +532,12 @@ typedef u64 acpi_integer;
 	 strnlen (a, ACPI_NAMESEG_SIZE) == ACPI_NAMESEG_SIZE)
 
 /*
- * Algorithm to obtain access bit width.
+ * Algorithm to obtain access bit or byte width.
  * Can be used with access_width of struct acpi_generic_address and access_size of
  * struct acpi_resource_generic_register.
  */
 #define ACPI_ACCESS_BIT_WIDTH(size)     (1 << ((size) + 2))
+#define ACPI_ACCESS_BYTE_WIDTH(size)    (1 << ((size) - 1))
 
 /*******************************************************************************
  *
-- 
2.25.0


  reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-12 14:59 [PATCH v2 0/3] ACPI / watchdog: Fix two reported issues Mika Westerberg
2020-02-12 14:59 ` Mika Westerberg [this message]
2020-02-12 21:02   ` [PATCH v2 1/3] ACPICA: Introduce ACPI_ACCESS_BYTE_WIDTH() macro Moore, Robert
2020-02-12 14:59 ` [PATCH v2 2/3] ACPI / watchdog: Fix gas->access_width usage Mika Westerberg
2020-02-12 15:55   ` Jean Delvare
2020-02-12 16:58     ` Mika Westerberg
2020-02-12 14:59 ` [PATCH v2 3/3] ACPI / watchdog: Set default timeout in probe Mika Westerberg
2020-02-12 16:04   ` Jean Delvare
2020-02-13 22:53 ` [PATCH v2 0/3] ACPI / watchdog: Fix two reported issues Rafael J. Wysocki

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