Using regmap_update_bits to update a write only register

[Daniel Baluta]

Hi Mark,

Is it possible to use regmap_update_bits to update the values
of some bits in a write only register?

I was hoping that by filling the .reg_defaults field of regmap_config
the regmap_update_bits function will not try to read the register
from hardware.

Instead I think first call of regmap_update_bits will try to read the register
from hardware, but this fails with -EIO because the register is marked as
write only.

Am I doing something wrong?

thanks,
Daniel.
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