linux-kernel - [PATCH 4.14 036/126] ACPICA: Introduce ACPI_ACCESS_BYTE

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Message-Id: <20200310124206.687601253@linuxfoundation.org>
Date:   Tue, 10 Mar 2020 13:40:57 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jean Delvare <jdelvare@...e.de>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: [PATCH 4.14 036/126] ACPICA: Introduce ACPI_ACCESS_BYTE_WIDTH() macro

From: Mika Westerberg <mika.westerberg@...ux.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@...e.de>
Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
Reviewed-by: Jean Delvare <jdelvare@...e.de>
Cc: 4.16+ <stable@...r.kernel.org> # 4.16+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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

--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -556,11 +556,12 @@ 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))
 
 /*******************************************************************************
  *