linux-next.git/include/linux/misc, branch master

misc: amd-sbi: Add SBTSI ioctl register transfer interface

2026-07-17T13:50:48+00:00

Implement IOCTL interface for SB-TSI driver to enable userspace access to TSI register read/write operations through the AMD Advanced Platform Management Link (APML) protocol. Add an ioctl command (SBTSI_IOCTL_REG_XFER_CMD) that accepts a register address, data byte, and direction flag. The mutex is taken on the ioctl path here; the hwmon path is placed under the same lock in the next patch, which completes serialization between the hwmon and ioctl paths. Reviewed-by: Akshay Gupta Signed-off-by: Prathima Link: https://patch.msgid.link/20260710111642.850022-7-Akshay.Gupta@amd.com Signed-off-by: Greg Kroah-Hartman

misc: amd-sbi: Add support for SB-TSI over I3C

2026-07-17T13:50:48+00:00

AMD SB-TSI temperature sensors can be accessed over both I2C and I3C buses depending on the platform configuration. Extend the SB-TSI driver to support both I2C and I3C bus interfaces by selecting the appropriate transport based on the probed bus type. The driver maintains backward compatibility with existing I2C deployments while enabling support for systems using the I3C bus. Register both I2C and I3C drivers using module_i3c_i2c_driver() and update the Kconfig dependency from I2C to I3C_OR_I2C. Reviewed-by: Akshay Gupta Signed-off-by: Prathima Link: https://patch.msgid.link/20260710111642.850022-6-Akshay.Gupta@amd.com Signed-off-by: Greg Kroah-Hartman

misc: amd-sbi: Consolidate Common SBTSI Probe Path

2026-07-17T13:50:48+00:00

Refactor shared probe procedures into sbtsi_probe_common() to ensure that I2C and I3C probes focus solely on bus-specific allocation and device configuration. The utility function reads the configuration register via sbtsi_xfer(), initializes ext_range_mode and read_order, assigns the driver data, and registers the hwmon auxiliary device. Routing register access through sbtsi_xfer() keeps the probe path bus-agnostic, so no transfer logic has to be duplicated when SB-TSI over I3C support is added in a later patch. Reviewed-by: Akshay Gupta Signed-off-by: Prathima Link: https://patch.msgid.link/20260710111642.850022-5-Akshay.Gupta@amd.com Signed-off-by: Greg Kroah-Hartman

hwmon/misc: amd-sbi: Move sbtsi register transfer to core abstraction

2026-07-17T13:50:48+00:00

Move the I2C read/write byte operations from the sbtsi hwmon driver into a common sbtsi_xfer() function in tsi-core.c. This decouples the hwmon sensor driver from the underlying bus transport, preparing for I3C support in a subsequent patch. This patch does not introduce any functional changes. The updates are limited to code organization/cleanup and should not affect the runtime behavior of the driver Reviewed-by: Akshay Gupta Signed-off-by: Prathima Acked-by: Guenter Roeck Link: https://patch.msgid.link/20260710111642.850022-4-Akshay.Gupta@amd.com Signed-off-by: Greg Kroah-Hartman

hwmon/misc: amd-sbi: Move core sbtsi support from hwmon to misc

2026-07-17T13:50:48+00:00

Move SBTSI(Side-Band Temperature Sensor Interface) core functionality out of the hwmon-only path and into drivers/misc/amd-sbi so it can be reused by non-hwmon consumers. I2C probe parsing is moved from drivers/hwmon/sbtsi_temp.c into drivers/misc/amd-sbi/tsi.c under CONFIG_AMD_SBTSI. The core driver stores struct sbtsi_data on the bus device and registers an auxiliary device amd-sbtsi.temp-sensor. per target. The current hwmon temp sensor will now require the CONFIG_AMD_SBTSI configuration as a new dependency. This split prepares the driver for additional interfaces while keeping hwmon support in hwmon subsystem on top of common SBTSI core logic. Add platform dependencies to clarify this driver is intended to run on the BMC and not on the managed node. Reviewed-by: Akshay Gupta Signed-off-by: Prathima Acked-by: Guenter Roeck Link: https://patch.msgid.link/20260710111642.850022-2-Akshay.Gupta@amd.com Signed-off-by: Greg Kroah-Hartman

misc: keba: Add UART devices

2024-10-13T15:16:57+00:00

Add support for the UART auxiliary devices. This enables access to up to 3 different UARTs, which are implemented in the FPGA. Signed-off-by: Gerhard Engleder Link: https://lore.kernel.org/r/20241011191257.19702-9-gerhard@engleder-embedded.com Signed-off-by: Greg Kroah-Hartman

misc: keba: Add battery device

2024-10-13T15:16:57+00:00

Add support for the battery auxiliary device. This enables monitoring of the battery. Signed-off-by: Gerhard Engleder Link: https://lore.kernel.org/r/20241011191257.19702-8-gerhard@engleder-embedded.com Signed-off-by: Greg Kroah-Hartman

misc: keba: Add fan device

2024-10-13T15:16:57+00:00

Add support for the fan auxiliary device. This enables monitoring of the fan. Signed-off-by: Gerhard Engleder Link: https://lore.kernel.org/r/20241011191257.19702-7-gerhard@engleder-embedded.com Signed-off-by: Greg Kroah-Hartman

misc: keba: Add SPI controller device

2024-10-13T15:16:57+00:00

Add support for the SPI controller auxiliary device. This enables access to the SPI flash of the FPGA and some other SPI devices. The actual list of SPI devices is detected by reading some bits out of the previously registered I2C EEPROM. Signed-off-by: Gerhard Engleder Link: https://lore.kernel.org/r/20241011191257.19702-4-gerhard@engleder-embedded.com Signed-off-by: Greg Kroah-Hartman

misc: keba: Add basic KEBA CP500 system FPGA support

2024-07-04T10:29:07+00:00

The KEBA CP500 system FPGA is a PCIe device, which consists of multiple IP cores. Every IP core has its own auxiliary driver. The cp500 driver registers an auxiliary device for each device and the corresponding drivers are loaded by the Linux driver infrastructure. Currently 3 variants of this device exists. Every variant has its own PCI device ID, which is used to determine the list of available IP cores. In this first version only the auxiliary device for the I2C controller is registered. Besides the auxiliary device registration some other basic functions of the FPGA are implemented; e.g, FPGA version sysfs file, keep FPGA configuration on reset sysfs file, error message for errors on the internal AXI bus of the FPGA. Signed-off-by: Gerhard Engleder Link: https://lore.kernel.org/r/20240630194740.7137-2-gerhard@engleder-embedded.com Signed-off-by: Greg Kroah-Hartman