From e7bb1a2ab8c4b1569f5b271fd87ca203b1e673a5 Mon Sep 17 00:00:00 2001 From: Kun Yi Date: Fri, 11 Dec 2020 13:54:25 -0800 Subject: hwmon: (sbtsi) Add basic support for SB-TSI sensors SB Temperature Sensor Interface (SB-TSI) is an SMBus compatible interface that reports AMD SoC's Ttcl (normalized temperature), and resembles a typical 8-pin remote temperature sensor's I2C interface to BMC. This commit adds basic support using this interface to read CPU temperature, and read/write high/low CPU temp thresholds. To instantiate this driver on an AMD CPU with SB-TSI support, the i2c bus number would be the bus connected from the board management controller (BMC) to the CPU. The i2c address is specified in Section 6.3.1 of the spec [1]: The SB-TSI address is normally 98h for socket 0 and 90h for socket 1, but it could vary based on hardware address select pins. [1]: https://www.amd.com/system/files/TechDocs/56255_OSRR.pdf Test status: tested reading temp1_input, and reading/writing temp1_max/min. Signed-off-by: Kun Yi Link: https://lore.kernel.org/r/20201211215427.3281681-2-kunyi@google.com Signed-off-by: Guenter Roeck --- drivers/hwmon/Kconfig | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'drivers/hwmon/Kconfig') diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 49920a1af3d0..1ecf697d8d99 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1533,6 +1533,16 @@ config SENSORS_SL28CPLD This driver can also be built as a module. If so, the module will be called sl28cpld-hwmon. +config SENSORS_SBTSI + tristate "Emulated SB-TSI temperature sensor" + depends on I2C + help + If you say yes here you get support for emulated temperature + sensors on AMD SoCs with SB-TSI interface connected to a BMC device. + + This driver can also be built as a module. If so, the module will + be called sbtsi_temp. + config SENSORS_SHT15 tristate "Sensiron humidity and temperature sensors. SHT15 and compat." depends on GPIOLIB || COMPILE_TEST -- cgit v1.2.3