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authorMika Westerberg <mika.westerberg@linux.intel.com>2020-02-12 17:59:39 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2020-02-13 23:51:30 +0100
commit1dade3a7048ccfc675650cd2cf13d578b095e5fb (patch)
tree2a34e22fe926489f057b0bc92182cf87ae49b773 /include/acpi
parent3f9e12e0df012c4a9a7fd7eb0d3ae69b459d6b2c (diff)
ACPICA: Introduce ACPI_ACCESS_BYTE_WIDTH() macro
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> Cc: 4.16+ <stable@vger.kernel.org> # 4.16+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/acpi')
-rw-r--r--include/acpi/actypes.h3
1 files changed, 2 insertions, 1 deletions
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))
/*******************************************************************************
*