[0/3] Add support for Congatec CGEB BIOS interface

Message

Mary Strodl July 18, 2024, 1:15 a.m. UTC

The following series adds support for the Congatec CGEB interface
found on some Congatec x86 boards. The CGEB interface is a BIOS
interface which provides access to onboard peripherals like I2C
busses and watchdogs. It works by mapping BIOS code and searching
for magic values which specify the entry points to the CGEB call.
The CGEB call is an API provided by the BIOS which provides access
to the functions in an ioctl like fashion.

This series is based on the excellent work of Sascha Hauer and
Christian Gmeiner. You can find their original work here:

http://patchwork.ozlabs.org/patch/219756/
http://patchwork.ozlabs.org/patch/219755/
http://patchwork.ozlabs.org/patch/219757/

http://patchwork.ozlabs.org/patch/483262/
http://patchwork.ozlabs.org/patch/483264/
http://patchwork.ozlabs.org/patch/483261/
http://patchwork.ozlabs.org/patch/483263/

Mary Strodl (1):
  mm: vmalloc: export __vmalloc_node_range

Sascha Hauer (2):
  x86: Add basic support for the Congatec CGEB BIOS interface
  i2c: Add Congatec CGEB I2C driver

 drivers/i2c/busses/Kconfig             |   7 +
 drivers/i2c/busses/Makefile            |   1 +
 drivers/i2c/busses/i2c-congatec-cgeb.c | 187 ++++++++
 drivers/mfd/Kconfig                    |  10 +
 drivers/mfd/Makefile                   |   1 +
 drivers/mfd/congatec-cgeb.c            | 620 +++++++++++++++++++++++++
 include/linux/mfd/congatec-cgeb.h      | 105 +++++
 mm/vmalloc.c                           |   1 +
 8 files changed, 932 insertions(+)
 create mode 100644 drivers/i2c/busses/i2c-congatec-cgeb.c
 create mode 100644 drivers/mfd/congatec-cgeb.c
 create mode 100644 include/linux/mfd/congatec-cgeb.h