Le lun. 19 nov. 2018 à 13:20, Linus Walleij <linus.walleij@xxxxxxxxxx> a écrit : > > On Tue, Nov 13, 2018 at 10:51 AM Benjamin Gaignard > <benjamin.gaignard@xxxxxxxxxx> wrote: > > > If a hwspinlock if defined in device tree use it to protect > > configuration registers. > > > > Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxx> > > Patch applied with Alex' ACK. Thanks > > Out of curiosity: what is it protecting against? > I would guess simultaneous access from another CPU > but the commit doesn't say. > > Simultaneous access from two CPUs makes it extra important > that all register access is read-modify-write, so I'd have a second > check over the code to make sure this is the case. Yes it is to protect configuration registers from being used at the same by cortexA and cortexM. > > Yours, > Linus Walleij
