On Wed, Sep 16, 2020 at 11:39 AM Viresh Kumar <viresh.kumar@xxxxxxxxxx> wrote: > > From: Sudeep Holla <sudeep.holla@xxxxxxx> > > The ARM MHU's reference manual states following: > > "The MHU drives the signal using a 32-bit register, with all 32 bits > logically ORed together. The MHU provides a set of registers to enable > software to set, clear, and check the status of each of the bits of this > register independently. The use of 32 bits for each interrupt line > enables software to provide more information about the source of the > interrupt. For example, each bit of the register can be associated with > a type of event that can contribute to raising the interrupt." > > This patch thus extends the MHU controller's DT binding to add support > for doorbell mode. > > Though the same MHU hardware controller is used in the two modes, A new > compatible string is added here to represent the combination of the MHU > hardware and the firmware sitting on the other side (which expects each > bit to represent a different signal now). > > Reviewed-by: Rob Herring <robh@xxxxxxxxxx> > Signed-off-by: Sudeep Holla <sudeep.holla@xxxxxxx> > Co-developed-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx> > Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx> Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
