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bh=yK9WgE+/HXQJn+dMGAHbYee8OPSAix4maqmMu9Dx19M=; b=cMS7m6eJpflIQZOfkKzTLgxvAnjLQwqxNURb8MAMz+4+7fZW7dDnZ7ojC3t46CUlDx Wl7zctguxQ9fdTML/KO/V3D4Z88DsgD7qMSxNruP4/evUmzCUpdpLBa0WpXUFB1Elv+8 Mta/6Di+mgoZVUkxngxZCa0eGwqCg20lXO7FgJZKg0SgkZIu6nbbROsYDCwUWDTBL+z5 VRoYnmne5y7BMi+/V96s1obmoj7qma7Opv3b8X0n8Fo4N7RWtrto8OWcP5jEyt3Y6VxS 3LT0HgcCd0f91Ljysyishih7LI+I3HCKi69n+HBcLUKxfCjakEdVzpc/VzUZcclynBOR Mkdg== X-Gm-Message-State: AOAM5316t9o/Evu4yXhnlerlBuBrt2Un/RTs0brONt7xSI0TTSvQ9RKQ hM0mH03AUvRqK+7vOgjsl1X1AwEOktM= X-Received: by 2002:aca:2219:: with SMTP id b25mr6472309oic.112.1615474672824; Thu, 11 Mar 2021 06:57:52 -0800 (PST) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id a185sm598642oif.49.2021.03.11.06.57.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 11 Mar 2021 06:57:52 -0800 (PST) Sender: Guenter Roeck Subject: Re: sensors-detect: Found unknown chip with ID 0x0404 To: Corentin Labbe , jdelvare@suse.com, linux-hwmon@vger.kernel.org Cc: linux-kernel@vger.kernel.org References: From: Guenter Roeck Autocrypt: addr=linux@roeck-us.net; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/11/21 6:17 AM, Corentin Labbe wrote: > Hello > > I have a server where sensors-detecte gives: > Some Super I/O chips contain embedded sensors. We have to write to > standard I/O ports to probe them. This is usually safe. > Do you want to scan for Super I/O sensors? (YES/no): > Probing for Super-I/O at 0x2e/0x2f > Trying family `National Semiconductor/ITE'... Yes > Found unknown chip with ID 0x0404 > > I have tried to search on the motherboard but didnt find any visible NS nor ITE chip. (could it be embeded in chipset or BMC for example ?) > Furthermore, with another OS (a buildroot with more recent kernel), sensors-detect give that the ID is 0x0101. > Any hope there is a real hwmon chip behind ? > Unlikely, given that the ID is not stable and that both ID registers return the same (changing) value. It could be a BMC or an EC but that won't help since we don't know how to access it. Guenter