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| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2020-02-12 17:59:39 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-05 16:42:17 +0100 |
| commit | 0872684612b95b3ccbb42a1d46985b2b3f1c2acd (patch) | |
| tree | 734bd35bfa45e837d0e97f53ed07e7286937c3f2 /include/acpi | |
| parent | c24d457a824f641ca328a20dd28872cfd97a005a (diff) | |
| download | linux-stable-0872684612b95b3ccbb42a1d46985b2b3f1c2acd.tar.gz linux-stable-0872684612b95b3ccbb42a1d46985b2b3f1c2acd.tar.bz2 linux-stable-0872684612b95b3ccbb42a1d46985b2b3f1c2acd.zip | |
ACPICA: Introduce ACPI_ACCESS_BYTE_WIDTH() macro
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>
Diffstat (limited to 'include/acpi')
| -rw-r--r-- | include/acpi/actypes.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h index 66ceb12ebc63..2939a6cd7fec 100644 --- a/include/acpi/actypes.h +++ b/include/acpi/actypes.h @@ -528,11 +528,12 @@ 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)) /******************************************************************************* * |