[PATCH 00/11] firmware: qemu_fw_cfg: implement file system

[Ahmad Fatoum]

The character device we currently have is cumbersome to use.
The Linux way to access it at /sys/firmware/qemu_fw_cfg
is much nicer to use, so this series adds support for a similar
FS to barebox.

A very nice result of having file system access to the QEMU variables
in barebox is that we get a trivial way to pass data to barebox.
To make it even more convenient to use, this series enables overriding
individual files in the environment via the new mechanism, e.g.:

  pytest --env nv/boot.default=fit --env boot/fit=@boot.sh

Ahmad Fatoum (11):
  video: ramfb: fix frame buffer screen size
  firmware: qemu_fw_cfg: drop duplicate definitions
  firmware: qemu_fw_cfg: add support for seeking
  firmware: qemu_fw_cfg: rename from /dev/fw_cfg0 to /dev/fw_cfg
  fs: add qemu_fw_cfg file system
  firmware: qemu_fw_cfg: register at device initcall level
  video: ramfb: use new qemu fw_cfg FS
  libfile: give copy_file a flags parameter
  libfile: pass copy_file flags through copy_recursive
  libfile: add support for not clobbering files in copy_file
  fs: qemu_fw_cfg: support populating environment via QEMU fw_cfg

 commands/Kconfig               |   4 +-
 commands/cp.c                  |  18 +-
 commands/defaultenv.c          |   2 +-
 commands/tftp.c                |   2 +-
 common/fastboot.c              |   2 +-
 conftest.py                    |  22 ++
 defaultenv/defaultenv.c        |  22 ++
 drivers/firmware/qemu_fw_cfg.c |  63 +++--
 drivers/video/Kconfig          |   2 +-
 drivers/video/ramfb.c          | 116 ++++------
 fs/Kconfig                     |   7 +
 fs/Makefile                    |   1 +
 fs/qemu_fw_cfg.c               | 404 +++++++++++++++++++++++++++++++++
 include/envfs.h                |   5 +
 include/libfile.h              |   8 +-
 include/string.h               |   5 +
 lib/libfile.c                  |  43 +++-
 17 files changed, 592 insertions(+), 134 deletions(-)
 create mode 100644 fs/qemu_fw_cfg.c

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2.39.5