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Mon, 18 May 2026 17:07:48 -0700 (PDT) Received: from mincom1 ([119.214.48.64]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2bdc58575dfsm79021755ad.20.2026.05.18.17.07.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 May 2026 17:07:48 -0700 (PDT) From: Jihong Min To: Greg Kroah-Hartman , Mathias Nyman Cc: Guenter Roeck , Jonathan Corbet , Shuah Khan , Mario Limonciello , Basavaraj Natikar , Michal Pecio , Mario Limonciello , Yaroslav Isakov , linux-usb@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-doc@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Jihong Min Subject: [PATCH v7 0/2] AMD Promontory 21 xHCI temperature sensor support Date: Tue, 19 May 2026 09:07:30 +0900 Message-ID: <20260519000732.2334711-1-hurryman2212@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi, This series adds temperature monitoring for AMD Promontory 21 (PROM21) xHCI PCI functions. Patch 1 adds a small PROM21-specific xHCI PCI glue driver. USB host operation is delegated to the common xhci-pci code, while the PROM21 glue publishes an auxiliary device for optional sensor support. Patch 2 adds an auxiliary-bus hwmon driver that binds to that auxiliary device and exposes the PROM21 xHCI temperature value as temp1_input. The hwmon driver reads the sensor through a vendor index/data register pair in the xHCI PCI MMIO BAR. It does not wake the parent PCI device for hwmon reads; if the parent is suspended, the read returns -ENODATA. Changes in v7: - Tie the hidden PROM21 PCI glue option to the user-visible SENSORS_PROM21_XHCI option instead of enabling it for all x86 builds. - Drop an unnecessary NULL check after successful xhci_pci_common_probe(). - Use a goto-based cleanup path in prom21_xhci_create_auxdev(). Jihong Min (2): usb: xhci-pci: add AMD Promontory 21 PCI glue hwmon: add AMD Promontory 21 xHCI temperature sensor support Documentation/hwmon/index.rst | 1 + Documentation/hwmon/prom21-xhci.rst | 101 ++++++++ drivers/hwmon/Kconfig | 10 + drivers/hwmon/Makefile | 1 + drivers/hwmon/prom21-xhci.c | 239 ++++++++++++++++++ drivers/usb/host/Kconfig | 6 + drivers/usb/host/Makefile | 1 + drivers/usb/host/xhci-pci-prom21.c | 137 ++++++++++ drivers/usb/host/xhci-pci.c | 11 + drivers/usb/host/xhci-pci.h | 3 + include/linux/platform_data/usb-xhci-prom21.h | 22 ++ 11 files changed, 532 insertions(+) create mode 100644 Documentation/hwmon/prom21-xhci.rst create mode 100644 drivers/hwmon/prom21-xhci.c create mode 100644 drivers/usb/host/xhci-pci-prom21.c create mode 100644 include/linux/platform_data/usb-xhci-prom21.h base-commit: 4d3a2a466b8d68d852a1f3bbf11204b718428dc4 -- 2.53.0