Re: use_gpio_descriptor with a runtime-added table

[Marco Sirabella <marco@xxxxxxxxxxxxx>]

Hi,

let me know if there's a better place to ask for help.

I'm registering a controller and trying to take advantage of:

    master->use_gpio_descriptors = true

but the gpio table with the auto-lookup "cs" is being registered at
runtime with gpiod_add_lookup_table (kind of like how spi-bcm2835 does
it).

My issue is basically that table.dev_id doesn't have a value that it can
be set to until halfway through the devm_spi_register_controller call
with the dev_set_name and by then I can't update the table's dev_id for
it to be found via the gpio handling in the second half of the
register_controller call.

My current workaround is to statically assign a master->bus_num and use
that but I'm pretty sure that's not what it's intended for.

Any tips? I have a patch that might fix this but don't want to jump the
gun if I'm just doing something wrong.

--
Marco Sirabella