[PATCH v3 0/4] Add Amlogic secure monitor driver

[carlo@caione.org (Carlo Caione)]

From: Carlo Caione <carlo@endlessm.com>

In the Amlogic SoCs the secure monitor calls are used for a lot of reasons:
interact with the NVMEM (efuses), check the reboot reason, set USB boot, ...

This driver defines a generic interface towards the secure monitor that can be
used by more specialized drivers to interact with the secure monitor itself
without worrying about bounce buffers managing.

Changelog:

v3:
  * Moved driver to drivers/firmware
  * Added EXPORT_SYMBOL macros
  * Changed '_' in '-'
  * Introduced 'struct meson_sm_firmware' and 'meson_sm_get_fw()' to be used by
    drivers using the secure-monitor to enforce probe ordering

v2:
  * All the SMC function identifiers are now in a SoC-specific header file to
    be included by the DTS files so the SMC commands are now defined in the DT
    instead to be hardcoded into the driver
  * Patchset is no longer an RFC
  * Better error management and boundary checking
  * s/unsigned int/u32/
  * SMC call not only on CPU 0
  * Fix memory leaking
  * s/amlogic/meson/ in the directory names


Carlo Caione (4):
  firmware: Amlogic: Add secure monitor driver
  firmware: dt-bindings: Add secure monitor header file for GXBB
  ARM64: dts: amlogic: gxbb: Enable secure monitor
  documentation: Add secure monitor binding documentation

 .../bindings/firmware/meson/meson_sm.txt           |  51 ++++++
 arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi        |  11 ++
 drivers/firmware/Kconfig                           |   1 +
 drivers/firmware/Makefile                          |   1 +
 drivers/firmware/meson/Kconfig                     |   8 +
 drivers/firmware/meson/Makefile                    |   1 +
 drivers/firmware/meson/meson_sm.c                  | 179 +++++++++++++++++++++
 include/dt-bindings/firmware/meson-gxbb-sm.h       |  44 +++++
 include/linux/firmware/meson/meson_sm.h            |  38 +++++
 9 files changed, 334 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/firmware/meson/meson_sm.txt
 create mode 100644 drivers/firmware/meson/Kconfig
 create mode 100644 drivers/firmware/meson/Makefile
 create mode 100644 drivers/firmware/meson/meson_sm.c
 create mode 100644 include/dt-bindings/firmware/meson-gxbb-sm.h
 create mode 100644 include/linux/firmware/meson/meson_sm.h

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2.7.4