From patchwork Sat May 27 05:31:27 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Darren Hart X-Patchwork-Id: 9751545 X-Patchwork-Delegate: dvhart@infradead.org Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 473286032C for ; Sat, 27 May 2017 05:35:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3AA30283C5 for ; Sat, 27 May 2017 05:35:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2F9742846C; Sat, 27 May 2017 05:35:19 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A2696283C5 for ; Sat, 27 May 2017 05:35:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752254AbdE0FcO (ORCPT ); Sat, 27 May 2017 01:32:14 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:46524 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752133AbdE0Fb7 (ORCPT ); Sat, 27 May 2017 01:31:59 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc: To:From:Sender:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=iNXKpVL0L6S1tmNAswEEew1xPHpwfwTRwsWZK6CjpWQ=; b=hOy9VwBKCKfzDRWw2LjNKpYXJ pfmheAGl0JZ3JcAGeLZShYbAs8JWGOTMdeotDSYZ4kJutWP/V1ushgFn8StuDAiZJCHCb3LDbDQmS 5G7608eABH6e4VpgRdXOET5Dk6yug2jRhR+DZMLE+NpTuDVFP4rlqHK+xVfHG3FOYPO4YoKCoDP0i ljzms5iCS5K0zSxAeKpYn5AStGjENEqwEjy3mQrtJX5ugubypzAfnfPf6TIg01KJSRs1YzdeyEtvz gpx9SB7YGgaKgm230ed4QORn4Wlx4cdcTbtMgD9/XgGUmFHxwD8qy5jwPpC1RAPTxIRW30SX551rR XkXxlYMgQ==; Received: from dvhart by bombadil.infradead.org with local (Exim 4.87 #1 (Red Hat Linux)) id 1dEUKU-0000ke-OG; Sat, 27 May 2017 05:31:58 +0000 From: Darren Hart To: platform-driver-x86@vger.kernel.org Cc: Andy Shevchenko , Andy Lutomirski , Andy Lutomirski , Mario Limonciello , =?UTF-8?q?Pali=20Roh=C3=A1r?= , Rafael Wysocki , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Darren Hart Subject: [PATCH 13/16] platform/x86: wmi: Add an interface for subdrivers to access sibling devices Date: Fri, 26 May 2017 22:31:27 -0700 Message-Id: X-Mailer: git-send-email 2.9.4 In-Reply-To: References: In-Reply-To: References: MIME-Version: 1.0 Sender: platform-driver-x86-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Andy Lutomirski Some subdrivers need to access sibling devices. This gives them a clean way to do so. Signed-off-by: Andy Lutomirski Cc: Andy Lutomirski Cc: Mario Limonciello Cc: Pali Rohár Cc: Rafael Wysocki Cc: linux-kernel@vger.kernel.org Cc: platform-driver-x86@vger.kernel.org Cc: linux-acpi@vger.kernel.org Signed-off-by: Darren Hart (VMware) --- drivers/platform/x86/wmi.c | 17 +++++++++++++++++ include/linux/wmi.h | 4 ++++ 2 files changed, 21 insertions(+) diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c index f1c9464..8dd9988 100644 --- a/drivers/platform/x86/wmi.c +++ b/drivers/platform/x86/wmi.c @@ -344,6 +344,23 @@ union acpi_object *wmidev_block_query(struct wmi_device *wdev, u8 instance) } EXPORT_SYMBOL_GPL(wmidev_block_query); +struct wmi_device *wmidev_get_other_guid(struct wmi_device *wdev, + const char *guid_string) +{ + struct wmi_block *this_wb = container_of(wdev, struct wmi_block, dev); + struct wmi_block *other_wb; + + if (!find_guid(guid_string, &other_wb)) + return NULL; + + if (other_wb->acpi_device != this_wb->acpi_device) + return NULL; + + get_device(&other_wb->dev.dev); + return &other_wb->dev; +} +EXPORT_SYMBOL_GPL(wmidev_get_other_guid); + /** * wmi_set_block - Write to a WMI block * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba diff --git a/include/linux/wmi.h b/include/linux/wmi.h index 0ab2540..a283768 100644 --- a/include/linux/wmi.h +++ b/include/linux/wmi.h @@ -33,6 +33,10 @@ struct wmi_device { extern union acpi_object *wmidev_block_query(struct wmi_device *wdev, u8 instance); +/* Gets another device on the same bus. Caller must put_device the result. */ +extern struct wmi_device *wmidev_get_other_guid(struct wmi_device *wdev, + const char *guid_string); + struct wmi_device_id { const char *guid_string; };