Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753448AbbGBXtI (ORCPT ); Thu, 2 Jul 2015 19:49:08 -0400 Received: from mail-ig0-f182.google.com ([209.85.213.182]:38854 "EHLO mail-ig0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752326AbbGBXsu (ORCPT ); Thu, 2 Jul 2015 19:48:50 -0400 From: Al Stone To: linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: rjw@rjwysocki.net, lenb@kernel.org, catalin.marinas@arm.com, will.deacon@arm.com, tglx@linutronix.de, jason@lakedaemon.net, linux-kernel@vger.kernel.org, linaro-acpi@lists.linaro.org, linaro-kernel@lists.linaro.org, patches@linaro.org Subject: [PATCH v3 1/3] ACPI : introduce macros for using the ACPI specification version Date: Thu, 2 Jul 2015 17:48:34 -0600 Message-Id: <1435880916-2153-2-git-send-email-al.stone@linaro.org> X-Mailer: git-send-email 2.4.3 In-Reply-To: <1435880916-2153-1-git-send-email-al.stone@linaro.org> References: <1435880916-2153-1-git-send-email-al.stone@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1811 Lines: 47 Add the __ACPI_FADT_SPEC_VERSION() helper macro to build a proper version number from a major and minor revision number. Add also macros that use the helper to construct the current version from the values in the FADT (i.e., ACPI_FADT_SPEC_VERSION) and both the 5.1 and 6.0 versions. These macros are added in order to simplify retrieving and comparing ACPI specification version numbers, since this is becoming a more frequent need. In particular, there are some architectures that require at least a certain version of the spec, and there are differences in some structure sizes that have changed with recent versions but can only be tracked by spec version number. Fixes: aeb823bbacc2 (ACPICA: ACPI 6.0: Add changes for FADT table.) Signed-off-by: Al Stone --- include/linux/acpi.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/linux/acpi.h b/include/linux/acpi.h index c471dfc..0e525e8 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -48,6 +48,16 @@ #include #include +#define __ACPI_FADT_SPEC_VERSION(major, minor) \ + ((unsigned int)major << 8 | (unsigned int)minor) + +#define ACPI_FADT_SPEC_VERSION \ + __ACPI_FADT_SPEC_VERSION(acpi_gbl_FADT.header.revision, \ + acpi_gbl_FADT.minor_revision) + +#define ACPI_FADT_SPEC_VERSION_51 __ACPI_FADT_SPEC_VERSION(5, 1) +#define ACPI_FADT_SPEC_VERSION_60 __ACPI_FADT_SPEC_VERSION(6, 0) + static inline acpi_handle acpi_device_handle(struct acpi_device *adev) { return adev ? adev->handle : NULL; -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/