• Ohad Ben-Cohen's avatar
    remoteproc/omap: add a remoteproc driver for OMAP4 · 34ed5a33
    Ohad Ben-Cohen authored
    Add a remoteproc driver for OMAP4, so we can boot the dual-M3 and
    and DSP subsystems.
    Use the omap_device_* API to control the hardware state, and utilize
    the OMAP mailbox to interrupt the remote processor when a new message
    is pending (the mailbox payload is used to tell it which virtqueue was
    the message placed in).
    Conversely, when an inbound mailbox message arrives, tell the remoteproc
    core which virtqueue is triggered.
    Later we will also use the mailbox payload to signal omap-specific
    events like remote crashes (which will be used to trigger remoteproc
    recovery) and power management transitions. At that point we will also
    extend the remoteproc core to support this.
    Based on (but now quite far from) work done by Fernando Guzman Lugo
    <fernando.lugo@ti.com> and Hari Kanigeri <h-kanigeri2@ti.com>.
    Designed with Brian Swetland <swetland@google.com>.
    Signed-off-by: default avatarOhad Ben-Cohen <ohad@wizery.com>
    Acked-by: default avatarTony Lindgren <tony@atomide.com>
    Cc: Brian Swetland <swetland@google.com>
    Cc: Arnd Bergmann <arnd@arndb.de>
    Cc: Grant Likely <grant.likely@secretlab.ca>
    Cc: Russell King <linux@arm.linux.org.uk>
    Cc: Rusty Russell <rusty@rustcorp.com.au>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Greg KH <greg@kroah.com>
    Cc: Stephen Boyd <sboyd@codeaurora.org>