From 1dade3a7048ccfc675650cd2cf13d578b095e5fb Mon Sep 17 00:00:00 2001
From: Mika Westerberg <mika.westerberg@linux.intel.com>
Date: Wed, 12 Feb 2020 17:59:39 +0300
Subject: [PATCH] ACPICA: Introduce ACPI_ACCESS_BYTE_WIDTH() macro
Git-commit: 1dade3a7048ccfc675650cd2cf13d578b095e5fb
Patch-mainline: v5.6-rc4
References: bsc#1051510

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>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 include/acpi/actypes.h |    2 ++
 1 file changed, 2 insertions(+)

--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -551,11 +551,12 @@ typedef u64 acpi_integer;
 #define ACPI_MAKE_RSDP_SIG(dest)        (memcpy (ACPI_CAST_PTR (char, (dest)), ACPI_SIG_RSDP, 8))
 
 /*
- * 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))
 
 /*******************************************************************************
  *