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[v2,1/3] ACPICA: Introduce ACPI_ACCESS_BYTE_WIDTH() macro

Message ID 20200212145941.32914-2-mika.westerberg@linux.intel.com
State New
Headers show
Series [v2,1/3] ACPICA: Introduce ACPI_ACCESS_BYTE_WIDTH() macro | expand

Commit Message

Mika Westerberg Feb. 12, 2020, 2:59 p.m. UTC 
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(-)
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Patch

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))
 
 /*******************************************************************************
  *