[U-Boot] [PATCH v4 7/7] cmd: Add bind/unbind commands to bind a device to a driver from the command line

[Simon Glass]

On 9 August 2018 at 08:17, Jean-Jacques Hiblot <jjhiblot at ti.com> wrote:
> In some cases it can be useful to be able to bind a device to a driver from
> the command line.
> The obvious example is for versatile devices such as USB gadget.
> Another use case is when the devices are not yet ready at startup and
> require some setup before the drivers are bound (ex: FPGA which bitsream is
> fetched from a mass storage or ethernet)
>
> usage example:
>
> bind usb_dev_generic 0 usb_ether
> unbind usb_dev_generic 0 usb_ether
> or
> unbind eth 1
>
> bind /ocp/omap_dwc3 at 48380000/usb at 48390000 usb_ether
> unbind /ocp/omap_dwc3 at 48380000/usb at 48390000
>
> Signed-off-by: Jean-Jacques Hiblot <jjhiblot at ti.com>
>
>
> ---
>
> Changes in v4:
> - Fixed compiler warning: "cmd/bind.c:236:5: warning: ‘ret’ may be used
>   uninitialized in this function [-Wmaybe-uninitialized]"
>
> Changes in v3:
> - factorize code based on comments from ML
> - remove the devices before unbinding them
> - use device_find_global_by_ofnode() to get a device by its node.
>
> Changes in v2:
> - Make the bind/unbind command generic, not specific to usb device.
> - Update the API to be able to bind/unbind based on DTS node path
> - Add a Kconfig option to select the bind/unbind commands
>
>  arch/sandbox/dts/test.dts  |  11 ++
>  cmd/Kconfig                |   9 ++
>  cmd/Makefile               |   1 +
>  cmd/bind.c                 | 255 +++++++++++++++++++++++++++++++++++++++++++++
>  configs/sandbox_defconfig  |   1 +
>  test/py/tests/test_bind.py | 178 +++++++++++++++++++++++++++++++
>  6 files changed, 455 insertions(+)
>  create mode 100644 cmd/bind.c
>  create mode 100644 test/py/tests/test_bind.py

Reviewed-by: Simon Glass <sjg at chromium.org>