[PATCH v4 5/5] irqchip/irq-pruss-intc: Add support for ICSSG INTC on K3 SoCs

[Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>]

From: Suman Anna <s-anna@ti.com>

The K3 AM65x and J721E SoCs have the next generation of the PRU-ICSS IP,
commonly called ICSSG. The PRUSS INTC present within the ICSSG supports
more System Events (160 vs 64), more Interrupt Channels and Host Interrupts
(20 vs 10) compared to the previous generation PRUSS INTC instances. The
first 2 and the last 10 of these host interrupt lines are used by the
PRU and other auxiliary cores and sub-modules within the ICSSG, with 8
host interrupts connected to MPU. The host interrupts 5, 6, 7 are also
connected to the other ICSSG instances within the SoC and can be
partitioned as per system integration through the board dts files.

Enhance the PRUSS INTC driver to add support for this ICSSG INTC
instance.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
---
v3->v4:
- Move generic part to "irqchip/irq-pruss-intc: Add a PRUSS irqchip
  driver for PRUSS interrupts" patch and leave only platform related
  code.
v2->v3:
- Change patch order: use it directly after "irqchip/irq-pruss-intc:
  Implement irq_{get,set}_irqchip_state ops" and before new
  "irqchip/irq-pruss-intc: Add event mapping support" in order to reduce
  diff.
v1->v2:
- https://patchwork.kernel.org/patch/11069773/
---
 drivers/irqchip/Kconfig          | 2 +-
 drivers/irqchip/irq-pruss-intc.c | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 03e6ac1..d3297b7 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -495,7 +495,7 @@ config TI_SCI_INTA_IRQCHIP
 
 config TI_PRUSS_INTC
 	tristate "TI PRU-ICSS Interrupt Controller"
-	depends on ARCH_DAVINCI || SOC_AM33XX || SOC_AM43XX || SOC_DRA7XX || ARCH_KEYSTONE
+	depends on ARCH_DAVINCI || SOC_AM33XX || SOC_AM43XX || SOC_DRA7XX || ARCH_KEYSTONE || ARCH_K3
 	select IRQ_DOMAIN
 	help
 	   This enables support for the PRU-ICSS Local Interrupt Controller
diff --git a/drivers/irqchip/irq-pruss-intc.c b/drivers/irqchip/irq-pruss-intc.c
index c13ba14..a56065b 100644
--- a/drivers/irqchip/irq-pruss-intc.c
+++ b/drivers/irqchip/irq-pruss-intc.c
@@ -623,11 +623,20 @@ static const struct pruss_intc_match_data pruss_intc_data = {
 	.num_host_intrs = 10,
 };
 
+static const struct pruss_intc_match_data icssg_intc_data = {
+	.num_system_events = 160,
+	.num_host_intrs = 20,
+};
+
 static const struct of_device_id pruss_intc_of_match[] = {
 	{
 		.compatible = "ti,pruss-intc",
 		.data = &pruss_intc_data,
 	},
+	{
+		.compatible = "ti,icssg-intc",
+		.data = &icssg_intc_data,
+	},
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, pruss_intc_of_match);
-- 
2.7.4