Commits
Suman Anna committed eea82a17f94
remoteproc/pruss: add support for PRU-ICSS subsystems on 66AK2G SoC
The 66AK2G SoC supports two PRU-ICSS instances, named PRUSS0 and PRUSS1,
each of which has two PRU processor cores. The two PRU-ICSS instances
are identical to each other with few minor SoC integration differences,
and are very similar to the PRU-ICSS1 of AM57xx/AM43xx. The Shared Data
RAM size is larger and the number of interrupts coming into MPU INTC
is like the instances on AM437x. There are also few other differences
attributing to integration in Keystone architecture (like no SYSCFG
register or PRCM handshake protocols). Other IP level differences
include different constant table, differences in system event interrupt
input sources etc. They also do not have a programmable module reset
line like those present on AM33xx/AM43xx SoCs. The modules are reset
just like any other IP with the SoC's global cold/warm resets.
The existing PRUSS platform drivers have been enhanced to support
these 66AK2G PRU-ICSS instances through new 66AK2G specific compatibles
for properly probing and booting all the different PRU cores in each
PRU-ICSS processor subsystem. A build dependency with ARCH_KEYSTONE is
added to enable the driver to be built in K2G-only configuration. The
OMAP Mailbox IP is not present on 66AK2G SoC, so the build dependency
has to be adjusted accordingly. The virtio rpmsg stack is enabled
using PRU system events for interrupts (possible to implement using
Keystone specific IPCGR registers as well) for uniformity across
all platforms.
The names for the firmware images are fixed for each PRU core and is
expected to be as follows for regular usecases:
PRU-ICSS0 PRU0 Core: k2g-pru0_0-fw
PRU-ICSS0 PRU1 Core: k2g-pru0_1-fw
PRU-ICSS1 PRU0 Core: k2g-pru1_0-fw
PRU-ICSS1 PRU1 Core: k2g-pru1_1-fw
Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>