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From:   Eddie James <eajames@linux.ibm.com>
To:     linux-kernel@vger.kernel.org
Cc:     devicetree@vger.kernel.org, linux-aspeed@lists.ozlabs.org,
        andrew@aj.id.au, joel@jms.id.au, mark.rutland@arm.com,
        robh+dt@kernel.org, maz@kernel.org, jason@lakedaemon.net,
        tglx@linutronix.de, Eddie James <eajames@linux.ibm.com>
Subject: [PATCH v2 1/4] dt-bindings: interrupt-controller: Add Aspeed SCU interrupt controller
Date:   Fri, 27 Sep 2019 15:58:46 -0500
Message-Id: <1569617929-29055-2-git-send-email-eajames@linux.ibm.com>
In-Reply-To: <1569617929-29055-1-git-send-email-eajames@linux.ibm.com>
References: <1569617929-29055-1-git-send-email-eajames@linux.ibm.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Document the Aspeed SCU interrupt controller and add an include file
for the interrupts it provides.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
---
 .../interrupt-controller/aspeed,ast2xxx-scu-ic.txt | 26 ++++++++++++++++++++++
 MAINTAINERS                                        |  7 ++++++
 .../interrupt-controller/aspeed-scu-ic.h           | 23 +++++++++++++++++++
 3 files changed, 56 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2xxx-scu-ic.txt
 create mode 100644 include/dt-bindings/interrupt-controller/aspeed-scu-ic.h

diff --git a/Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2xxx-scu-ic.txt b/Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2xxx-scu-ic.txt
new file mode 100644
index 0000000..baa3780
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2xxx-scu-ic.txt
@@ -0,0 +1,26 @@
+Aspeed AST25XX and AST26XX SCU Interrupt Controller
+
+Required Properties:
+ - #interrupt-cells		: must be 1
+ - compatible			: must be "aspeed,ast2500-scu-ic",
+				  "aspeed,ast2600-scu-ic0" or
+				  "aspeed,ast2600-scu-ic1"
+ - reg				: address and size of the SCU register
+				  associated with the controller
+ - interrupts			: interrupt from the parent controller
+ - interrupt-controller		: indicates that the controlle receives and
+				  fires new interrupts for child busses
+
+Example:
+
+    syscon@1e6e2000 {
+        ranges = <0 0x1e6e2000 0x1a8>;
+
+        scu_ic: interrupt-controller@18 {
+            #interrupt-cells = <1>;
+            compatible = "aspeed,ast2500-scu-ic";
+            reg = <0x18 0x04>;
+            interrupts = <21>;
+            interrupt-controller;
+        };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 7ce3c95..c7e028c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2651,6 +2651,13 @@ S:	Maintained
 F:	drivers/pinctrl/aspeed/
 F:	Documentation/devicetree/bindings/pinctrl/aspeed,*
 
+ASPEED SCU INTERRUPT CONTROLLER DRIVER
+M:	Eddie James <eajames@linux.ibm.com>
+L:	linux-aspeed@lists.ozlabs.org (moderated for non-subscribers)
+S:	Maintained
+F:	Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2xxx-scu-ic.txt
+F:	include/dt-bindings/interrupt-controller/aspeed-scu-ic.h
+
 ASPEED VIDEO ENGINE DRIVER
 M:	Eddie James <eajames@linux.ibm.com>
 L:	linux-media@vger.kernel.org
diff --git a/include/dt-bindings/interrupt-controller/aspeed-scu-ic.h b/include/dt-bindings/interrupt-controller/aspeed-scu-ic.h
new file mode 100644
index 0000000..f315d5a
--- /dev/null
+++ b/include/dt-bindings/interrupt-controller/aspeed-scu-ic.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef _DT_BINDINGS_INTERRUPT_CONTROLLER_ASPEED_SCU_IC_H_
+#define _DT_BINDINGS_INTERRUPT_CONTROLLER_ASPEED_SCU_IC_H_
+
+#define ASPEED_SCU_IC_VGA_CURSOR_CHANGE			0
+#define ASPEED_SCU_IC_VGA_SCRATCH_REG_CHANGE		1
+
+#define ASPEED_AST2500_SCU_IC_PCIE_RESET_LO_TO_HI	2
+#define ASPEED_AST2500_SCU_IC_PCIE_RESET_HI_TO_LO	3
+#define ASPEED_AST2500_SCU_IC_LPC_RESET_LO_TO_HI	4
+#define ASPEED_AST2500_SCU_IC_LPC_RESET_HI_TO_LO	5
+#define ASPEED_AST2500_SCU_IC_ISSUE_MSI			6
+
+#define ASPEED_AST2600_SCU_IC0_PCIE_PERST_LO_TO_HI	2
+#define ASPEED_AST2600_SCU_IC0_PCIE_PERST_HI_TO_LO	3
+#define ASPEED_AST2600_SCU_IC0_PCIE_RCRST_LO_TO_HI	4
+#define ASPEED_AST2600_SCU_IC0_PCIE_RCRST_HI_TO_LO	5
+
+#define ASPEED_AST2600_SCU_IC1_LPC_RESET_LO_TO_HI	0
+#define ASPEED_AST2600_SCU_IC1_LPC_RESET_HI_TO_LO	1
+
+#endif /* _DT_BINDINGS_INTERRUPT_CONTROLLER_ASPEED_SCU_IC_H_ */
-- 
1.8.3.1