From mboxrd@z Thu Jan 1 00:00:00 1970 From: 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: References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Return-path: 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 In-Reply-To: In-Reply-To: References: Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org 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 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; }; -- 2.9.4