kernel/linux.git/Documentation/misc-devices, branch v6.18.21

misc: amd-sbi: Add document for AMD SB IOCTL description

2025-05-21T12:44:41+00:00

- This document provides AMD side band IOCTL description defined for APML and its usage. Multiple AMD custom protocols defined for side band system management uses this IOCTL. User space C-APIs are made available by esmi_oob_library [1], which is provided by the E-SMS project [2]. Link: https://github.com/amd/esmi_oob_library [1] Link: https://www.amd.com/en/developer/e-sms.html [2] Reviewed-by: Naveen Krishna Chatradhi Signed-off-by: Akshay Gupta Link: https://lore.kernel.org/r/20250428063034.2145566-11-akshay.gupta@amd.com Signed-off-by: Greg Kroah-Hartman

misc: amd-sbi: Add support for AMD_SBI IOCTL

2025-05-21T12:44:40+00:00

The present sbrmi module only support reporting power via hwmon. However, AMD data center range of processors support various system management functionality using custom protocols defined in Advanced Platform Management Link (APML) specification. Register a miscdevice, which creates a device /dev/sbrmiX with an IOCTL interface for the user space to invoke the APML Mailbox protocol, which is already defined in sbrmi_mailbox_xfer(). The APML protocols depend on a set of RMI registers. Having an IOCTL as a single entry point will help in providing synchronization among these protocols as multiple transactions on RMI register set may create race condition. Support for other protocols will be added in subsequent patches. APML mailbox protocol returns additional error codes written by SMU firmware in the out-bound register 0x37. These errors include, invalid core, message not supported over platform and others. This additional error codes can be used to provide more details to user space. Open-sourced and widely used https://github.com/amd/esmi_oob_library will continue to provide user-space programmable API. Reviewed-by: Naveen Krishna Chatradhi Signed-off-by: Akshay Gupta Link: https://lore.kernel.org/r/20250428063034.2145566-7-akshay.gupta@amd.com Signed-off-by: Greg Kroah-Hartman

misc: lis3lv02d: Fix correct sysfs directory path for lis3lv02d

2025-05-21T12:44:12+00:00

The lis3lv02d driver does not create a platform device anymore. It was recently changed to use a faux device instead. Therefore the sysfs path has changed from /sys/devices/platform/lis3lv02d to /sys/devices/faux/lis3lv02d. Fixes: 3b18ccb5472b ("misc: lis3lv02d: convert to use faux_device") Signed-off-by: Roxana Nicolescu Link: https://lore.kernel.org/r/20250506110002.36477-1-nicolescu.roxana@protonmail.com Signed-off-by: Greg Kroah-Hartman

misc: mrvl-cn10k-dpi: add Octeon CN10K DPI administrative driver

2024-07-10T12:58:29+00:00

Adds a misc driver for Marvell CN10K DPI(DMA Engine) device's physical function which initializes DPI DMA hardware's global configuration and enables hardware mailbox channels between physical function (PF) and it's virtual functions (VF). VF device drivers (User space drivers) use this hw mailbox to communicate any required device configuration on it's respective VF device. Accordingly, this DPI PF driver provisions the VF device resources. At the hardware level, the DPI physical function (PF) acts as a management interface to setup the VF device resources, VF devices are only provisioned to handle or control the actual DMA Engine's data transfer capabilities. Signed-off-by: Vamsi Attunuru Reviewed-by: Srujana Challa Link: https://lore.kernel.org/r/20240706153009.3775333-1-vattunuru@marvell.com Signed-off-by: Greg Kroah-Hartman

dt-bindings: misc: xlnx,sd-fec: convert bindings to yaml

2024-02-05T01:49:51+00:00

Convert AMD (Xilinx) sd-fec bindings to yaml format, so it can validate dt-entries as well as any future additions to yaml. Change in clocks is due to IP is itself configurable and only the first two clocks are in all combinations. The last 6 clocks can be present in some of them. It means order is not really fixed and any combination is possible. Interrupt may or may not be present. The documentation for sd-fec bindings is now YAML, so update the MAINTAINERS file. Update the link to the new yaml file in xilinx_sdfec.rst. Signed-off-by: Dragan Cvetic Link: https://lore.kernel.org/r/20240131170650.530079-1-dragan.cvetic@amd.com Signed-off-by: Rob Herring

Merge branch 'vegard' into docs-mw

2023-11-17T20:07:51+00:00

Vegard Nossum writes: This patch series replaces some instances of 'class:: toc-title' with toctree's :caption: attribute, see the last patch in the series for some more rationale/explanation.

doc: misc-device: properly format ToC heading

2023-11-17T20:05:26+00:00

"class:: toc-title" was a workaround for older Sphinx versions that are no longer supported. The canonical way to add a heading to the ToC is to use :caption:. Do that. Cc: Greg Kroah-Hartman Cc: Julien Panis Signed-off-by: Vegard Nossum Signed-off-by: Jonathan Corbet Link: https://lore.kernel.org/r/20231027081830.195056-9-vegard.nossum@oracle.com

eeprom: remove doc and MAINTAINERS section after driver was removed

2023-10-18T08:01:34+00:00

Commit 0113a99b8a75 ("eeprom: Remove deprecated legacy eeprom driver") already removes the eeprom driver's code. Remove also the eeprom driver's documentation and MAINTAINERS section. Signed-off-by: Lukas Bulwahn Link: https://lore.kernel.org/r/20231012042834.6663-1-lukas.bulwahn@gmail.com Signed-off-by: Greg Kroah-Hartman

Documentation: Add TI TPS6594 PFSM

2023-06-15T11:41:53+00:00

This patch adds documentation for the TPS6594 PFSM driver. The PFSM controls the operational states of the TPS6594 PMIC. Depending on the operational mode, some power domain networks remain energized while others can be off. Signed-off-by: Julien Panis Message-ID: <20230511095126.105104-6-jpanis@baylibre.com> Signed-off-by: Greg Kroah-Hartman

Documentation: Wire Oxford Semiconductor PCIe (Tornado) 950

2022-05-19T16:24:22+00:00

Wire Oxford Semiconductor PCIe (Tornado) 950 description as a chapter into the misc-devices document. Signed-off-by: Maciej W. Rozycki Link: https://lore.kernel.org/r/alpine.DEB.2.21.2205131727070.10656@angie.orcam.me.uk Signed-off-by: Greg Kroah-Hartman