Commit 3227c8da authored Sep 11, 2020 by Suman Anna Committed by Santosh Shilimkar Sep 11, 2020

soc: ti: 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 driver has been enhanced to support these
66AK2G PRU-ICSS instances through new 66AK2G specific compatible 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.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>

parent ae19b8a1

drivers/soc/ti/Kconfig

+1 −1

Original line number	Diff line number	Diff line
		@@ -103,7 +103,7 @@ config TI_K3_SOCINFO

		config TI_PRUSS
		tristate "TI PRU-ICSS Subsystem Platform drivers"
		depends on SOC_AM33XX \|\| SOC_AM43XX \|\| SOC_DRA7XX
		depends on SOC_AM33XX \|\| SOC_AM43XX \|\| SOC_DRA7XX \|\| ARCH_KEYSTONE
		select MFD_SYSCON
		help
		TI PRU-ICSS Subsystem platform specific support.

drivers/soc/ti/pruss.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -162,6 +162,7 @@ static const struct of_device_id pruss_of_match[] = {
		{ .compatible = "ti,am4376-pruss0", .data = &am437x_pruss0_data, },
		{ .compatible = "ti,am4376-pruss1", .data = &am437x_pruss1_data, },
		{ .compatible = "ti,am5728-pruss" },
		{ .compatible = "ti,k2g-pruss" },
		{},
		};
		MODULE_DEVICE_TABLE(of, pruss_of_match);

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