[PATCH 5.4 073/152] ACPICA: Introduce ACPI_ACCESS_BYTE_WIDTH() macro

Greg Kroah-Hartman
2020-03-03T18:07:21Z

From: Mika Westerberg <mika.westerberg@linux.intel.com>

commit 1dade3a7048ccfc675650cd2cf13d578b095e5fb upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
include/acpi/actypes.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- 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))

/*******************************************************************************
*