Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753297AbaGHG7l (ORCPT ); Tue, 8 Jul 2014 02:59:41 -0400 Received: from mga03.intel.com ([143.182.124.21]:8861 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753189AbaGHG7h (ORCPT ); Tue, 8 Jul 2014 02:59:37 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.01,624,1400050800"; d="scan'208";a="454327737" From: Lan Tianyu To: robert.moore@intel.com, lv.zheng@intel.com, rafael.j.wysocki@intel.com, lenb@kernel.org Cc: Lan Tianyu , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 1/2] ACPICA: Add acpi_check_gpe_method() to check GPE method Date: Tue, 8 Jul 2014 14:57:57 +0800 Message-Id: <1404802679-24019-1-git-send-email-tianyu.lan@intel.com> X-Mailer: git-send-email 1.7.9.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch is to expose acpi_check_gpe_method() to check whether there is a GPE method for the given gpe. Enabling ACPI button devices' gpes will depend on the new function's result. Signed-off-by: Lan Tianyu --- drivers/acpi/acpica/evxface.c | 39 ++++++++++++++++++++++++++++++++++++++- include/acpi/acpixf.h | 3 +++ 2 files changed, 41 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/acpica/evxface.c b/drivers/acpi/acpica/evxface.c index 11e5803..0fcb248 100644 --- a/drivers/acpi/acpica/evxface.c +++ b/drivers/acpi/acpica/evxface.c @@ -717,6 +717,44 @@ ACPI_EXPORT_SYMBOL(acpi_remove_fixed_event_handler) /******************************************************************************* * + * FUNCTION: acpi_check_gpe_method + * + * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT + * defined GPEs) + * gpe_number - The event to remove a handler + * + * RETURN: Status + * + * DESCRIPTION: Check whether the given GPE has associated event method. + * + ******************************************************************************/ +acpi_status +acpi_check_gpe_method(acpi_handle gpe_device, u32 gpe_number) +{ + struct acpi_gpe_event_info *gpe_event_info; + acpi_status status = AE_NOT_EXIST; + acpi_cpu_flags flags; + + ACPI_FUNCTION_TRACE(acpi_check_gpe_method); + + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); + gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); + if (!gpe_event_info) { + status = AE_ERROR; + goto unlock_and_exit; + } + + if (gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD) + status = AE_OK; + +unlock_and_exit: + acpi_os_release_lock(acpi_gbl_gpe_lock, flags); + return status; +} +ACPI_EXPORT_SYMBOL(acpi_check_gpe_method) + +/******************************************************************************* + * * FUNCTION: acpi_install_gpe_handler * * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT @@ -821,7 +859,6 @@ free_and_exit: ACPI_FREE(handler); goto unlock_and_exit; } - ACPI_EXPORT_SYMBOL(acpi_install_gpe_handler) /******************************************************************************* diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h index 35b525c..5b475c6 100644 --- a/include/acpi/acpixf.h +++ b/include/acpi/acpixf.h @@ -554,6 +554,9 @@ ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status address, void *context)) ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status + acpi_check_gpe_method(acpi_handle gpe_device, + u32 gpe_number)) +ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_remove_gpe_handler(acpi_handle gpe_device, u32 gpe_number, acpi_gpe_handler -- 1.8.4.rc0.1.g8f6a3e5.dirty -- 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/