From: Yurii Pavlovskyi <yurii.pavlovskyi@gmail.com> To: unlisted-recipients:; (no To-header on input) Cc: Corentin Chary <corentin.chary@gmail.com>, Darren Hart <dvhart@infradead.org>, Andy Shevchenko <andy@infradead.org>, Daniel Drake <drake@endlessm.com>, Chris Chiu <chiu@endlessm.com>, acpi4asus-user@lists.sourceforge.net, platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org, "Rafael J. Wysocki" <rjw@rjwysocki.net>, Len Brown <lenb@kernel.org>, linux-acpi@vger.kernel.org Subject: [PATCH v4 04/13] platform/x86: wmi: Add function to get _UID of WMI device Date: Tue, 14 May 2019 20:59:01 +0200 [thread overview] Message-ID: <35811fe2-7aac-aa3c-46dc-2bef515b0f47@gmail.com> (raw) In-Reply-To: <c8cdb347-e206-76b2-0d43-546ef660ffb7@gmail.com> Add a new function to acpi.h / wmi.c that returns _UID of the ACPI WMI device. For example, it returns "ATK" for the following declaration in DSDT: Device (ATKD) { Name (_HID, "PNP0C14" /* Windows Management Instrumentation Device */) // _HID: Hardware ID Name (_UID, "ATK") // _UID: Unique ID .. Generally, it is possible that multiple PNP0C14 ACPI devices are present in the system as mentioned in the commit message of commit bff431e49ff5 ("ACPI: WMI: Add ACPI-WMI mapping driver"). Therefore the _UID is returned for a specific ACPI device that declares the given GUID, to which it is also mapped by other methods of wmi module. Signed-off-by: Yurii Pavlovskyi <yurii.pavlovskyi@gmail.com> --- drivers/platform/x86/wmi.c | 19 +++++++++++++++++++ include/linux/acpi.h | 1 + 2 files changed, 20 insertions(+) diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c index 7b26b6ccf1a0..b08ffb769cbe 100644 --- a/drivers/platform/x86/wmi.c +++ b/drivers/platform/x86/wmi.c @@ -635,6 +635,25 @@ bool wmi_has_guid(const char *guid_string) } EXPORT_SYMBOL_GPL(wmi_has_guid); +/** + * wmi_get_acpi_device_uid() - Get _UID name of ACPI device that defines GUID + * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba + * + * Find the _UID of ACPI device associated with this WMI GUID. + * + * Return: The ACPI _UID field value or NULL if the WMI GUID was not found + */ +char *wmi_get_acpi_device_uid(const char *guid_string) +{ + struct wmi_block *wblock = NULL; + + if (!find_guid(guid_string, &wblock)) + return NULL; + + return acpi_device_uid(wblock->acpi_device); +} +EXPORT_SYMBOL_GPL(wmi_get_acpi_device_uid); + static struct wmi_block *dev_to_wblock(struct device *dev) { return container_of(dev, struct wmi_block, dev.dev); diff --git a/include/linux/acpi.h b/include/linux/acpi.h index d5dcebd7aad3..d31c7fd66f97 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -376,6 +376,7 @@ extern acpi_status wmi_install_notify_handler(const char *guid, extern acpi_status wmi_remove_notify_handler(const char *guid); extern acpi_status wmi_get_event_data(u32 event, struct acpi_buffer *out); extern bool wmi_has_guid(const char *guid); +extern char *wmi_get_acpi_device_uid(const char *guid); #endif /* CONFIG_ACPI_WMI */ -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Yurii Pavlovskyi <yurii.pavlovskyi@gmail.com> Cc: Corentin Chary <corentin.chary@gmail.com>, Darren Hart <dvhart@infradead.org>, Andy Shevchenko <andy@infradead.org>, Daniel Drake <drake@endlessm.com>, Chris Chiu <chiu@endlessm.com>, acpi4asus-user@lists.sourceforge.net, platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org, "Rafael J. Wysocki" <rjw@rjwysocki.net>, Len Brown <lenb@kernel.org>, linux-acpi@vger.kernel.org Subject: [PATCH v4 04/13] platform/x86: wmi: Add function to get _UID of WMI device Date: Tue, 14 May 2019 20:59:01 +0200 [thread overview] Message-ID: <35811fe2-7aac-aa3c-46dc-2bef515b0f47@gmail.com> (raw) In-Reply-To: <c8cdb347-e206-76b2-0d43-546ef660ffb7@gmail.com> Add a new function to acpi.h / wmi.c that returns _UID of the ACPI WMI device. For example, it returns "ATK" for the following declaration in DSDT: Device (ATKD) { Name (_HID, "PNP0C14" /* Windows Management Instrumentation Device */) // _HID: Hardware ID Name (_UID, "ATK") // _UID: Unique ID .. Generally, it is possible that multiple PNP0C14 ACPI devices are present in the system as mentioned in the commit message of commit bff431e49ff5 ("ACPI: WMI: Add ACPI-WMI mapping driver"). Therefore the _UID is returned for a specific ACPI device that declares the given GUID, to which it is also mapped by other methods of wmi module. Signed-off-by: Yurii Pavlovskyi <yurii.pavlovskyi@gmail.com> --- drivers/platform/x86/wmi.c | 19 +++++++++++++++++++ include/linux/acpi.h | 1 + 2 files changed, 20 insertions(+) diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c index 7b26b6ccf1a0..b08ffb769cbe 100644 --- a/drivers/platform/x86/wmi.c +++ b/drivers/platform/x86/wmi.c @@ -635,6 +635,25 @@ bool wmi_has_guid(const char *guid_string) } EXPORT_SYMBOL_GPL(wmi_has_guid); +/** + * wmi_get_acpi_device_uid() - Get _UID name of ACPI device that defines GUID + * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba + * + * Find the _UID of ACPI device associated with this WMI GUID. + * + * Return: The ACPI _UID field value or NULL if the WMI GUID was not found + */ +char *wmi_get_acpi_device_uid(const char *guid_string) +{ + struct wmi_block *wblock = NULL; + + if (!find_guid(guid_string, &wblock)) + return NULL; + + return acpi_device_uid(wblock->acpi_device); +} +EXPORT_SYMBOL_GPL(wmi_get_acpi_device_uid); + static struct wmi_block *dev_to_wblock(struct device *dev) { return container_of(dev, struct wmi_block, dev.dev); diff --git a/include/linux/acpi.h b/include/linux/acpi.h index d5dcebd7aad3..d31c7fd66f97 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -376,6 +376,7 @@ extern acpi_status wmi_install_notify_handler(const char *guid, extern acpi_status wmi_remove_notify_handler(const char *guid); extern acpi_status wmi_get_event_data(u32 event, struct acpi_buffer *out); extern bool wmi_has_guid(const char *guid); +extern char *wmi_get_acpi_device_uid(const char *guid); #endif /* CONFIG_ACPI_WMI */ -- 2.17.1
next prev parent reply other threads:[~2019-05-14 18:59 UTC|newest] Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-05-14 18:47 [PATCH v4 00/13] Support of ASUS TUF Gaming series laptops Yurii Pavlovskyi 2019-05-14 18:47 ` Yurii Pavlovskyi 2019-05-14 18:50 ` [PATCH v4 01/13] platform/x86: asus-wmi: Fix hwmon device cleanup Yurii Pavlovskyi 2019-05-14 18:50 ` Yurii Pavlovskyi 2019-05-24 19:54 ` Daniel Drake 2019-05-14 18:51 ` [PATCH v4 02/13] platform/x86: asus-wmi: Fix preserving keyboard backlight intensity on load Yurii Pavlovskyi 2019-05-14 18:51 ` Yurii Pavlovskyi 2019-05-24 19:57 ` Daniel Drake 2019-05-14 18:54 ` [PATCH v4 03/13] platform/x86: asus-wmi: Increase input buffer size of WMI methods Yurii Pavlovskyi 2019-05-14 18:54 ` Yurii Pavlovskyi 2019-05-24 20:01 ` Daniel Drake 2019-05-14 18:59 ` Yurii Pavlovskyi [this message] 2019-05-14 18:59 ` [PATCH v4 04/13] platform/x86: wmi: Add function to get _UID of WMI device Yurii Pavlovskyi 2019-05-24 21:10 ` Daniel Drake 2019-05-14 19:00 ` [PATCH v4 05/13] platform/x86: asus-wmi: Improve DSTS WMI method ID detection Yurii Pavlovskyi 2019-05-14 19:00 ` Yurii Pavlovskyi 2019-05-14 19:01 ` [PATCH v4 06/13] platform/x86: asus-wmi: Refactor WMI event handling Yurii Pavlovskyi 2019-05-14 19:01 ` Yurii Pavlovskyi 2019-05-14 19:02 ` [PATCH v4 07/13] platform/x86: asus-wmi: Support WMI event queue Yurii Pavlovskyi 2019-05-14 19:02 ` Yurii Pavlovskyi 2019-05-14 19:02 ` [PATCH v4 08/13] platform/x86: asus-nb-wmi: Add microphone mute key code Yurii Pavlovskyi 2019-05-14 19:02 ` Yurii Pavlovskyi 2019-05-14 19:03 ` [PATCH v4 09/13] platform/x86: asus-wmi: Refactor error handling Yurii Pavlovskyi 2019-05-14 19:03 ` Yurii Pavlovskyi 2019-05-14 19:04 ` [PATCH v4 10/13] platform/x86: asus-wmi: Organize code into sections Yurii Pavlovskyi 2019-05-14 19:04 ` Yurii Pavlovskyi 2019-05-14 19:05 ` [PATCH v4 11/13] platform/x86: asus-wmi: Enhance detection of thermal data Yurii Pavlovskyi 2019-05-14 19:05 ` Yurii Pavlovskyi 2019-05-14 19:07 ` [PATCH v4 12/13] platform/x86: asus-wmi: Switch fan boost mode Yurii Pavlovskyi 2019-05-14 19:07 ` Yurii Pavlovskyi 2019-05-14 19:07 ` [PATCH v4 13/13] platform/x86: asus-wmi: Do not disable keyboard backlight on unloading Yurii Pavlovskyi 2019-05-14 19:07 ` Yurii Pavlovskyi 2019-06-29 13:13 ` [PATCH v4 00/13] Support of ASUS TUF Gaming series laptops Andy Shevchenko
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