[RFC PATCH net-next 2/2] net: dsa: mt7530: introduce MMIO driver for MT7988 SoC

[Vladimir Oltean]

On Tue, Mar 28, 2023 at 02:08:18PM +0100, Daniel Golle wrote:
> I agree that using regmap would be better and I have evaluated that
> approach as well. As regmap doesn't allow lock-skipping and mt7530.c is
> much more complex than xrs700x in the way indirect access to its MDIO bus
> and interrupts work, using regmap accessors for everything would not be
> trivial.
> 
> So here we can of course use regmap_read_poll_timeout and a bunch of
> readmap_write operations. However, each of them will individually acquire
> and release the mdio bus mutex while the current code acquires the lock
> at the top of the function and then uses unlocked operations.
> regmap currently doesn't offer any way to skip the locking and/or perform
> locking manually. regmap_read, regmap_write, regmap_update_bits, ... always
> acquire and release the lock on each operation.

What does struct regmap_config :: disable_locking do?