Hi Chris, > I don't think we'd want this per master. The lock is for the 'top' > master issuing commands. Only the top master can initiate any > transactions on the bus to any devices connected downstream. Downstream > masters such as hub masters, etc... cannot initiate a command.
I think what Joel meant there was that we have it per *GPIO* master; if there are two GPIO masters on a system, there's no need to provide mutual exclusion to each (separate) set of GPIOs. To implement this, we'd just move the lock into struct fsi_master_gpio. Cheers, Jeremy
