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Message-ID: <20221123100850.22969-2-rtanwar@maxlinear.com>
Date: Wed, 23 Nov 2022 18:08:47 +0800
From: Rahul Tanwar <rtanwar@...linear.com>
To: Rahul Tanwar <rtanwar@...linear.com>,
<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>
CC: Thomas Gleixner <tglx@...utronix.de>,
Marc Zyngier <maz@...nel.org>,
"Rob Herring" <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Ingo Molnar <mingo@...hat.com>,
"Borislav Petkov" <bp@...en8.de>,
Dave Hansen <dave.hansen@...ux.intel.com>, <x86@...nel.org>,
"H. Peter Anvin" <hpa@...or.com>, <linux-lgm-soc@...linear.com>,
<andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v4 1/4] dt-bindings: x86: apic: Convert Intel's APIC bindings to YAML schema
Intel's APIC family of interrupt controllers support local APIC
(lapic) & I/O APIC (ioapic). Convert existing bindings for lapic
& ioapic from text to YAML schema. Separate lapic & ioapic schemas.
Addditionally, add description which was missing in text file and
add few more required standard properties which were also missing
in text file.
Suggested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Rahul Tanwar <rtanwar@...linear.com>
---
.../intel,ce4100-ioapic.txt | 26 --------
.../intel,ce4100-ioapic.yaml | 62 +++++++++++++++++++
.../intel,ce4100-lapic.yaml | 49 +++++++++++++++
3 files changed, 111 insertions(+), 26 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/interrupt-controller/intel,ce4100-ioapic.txt
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/intel,ce4100-ioapic.yaml
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/intel,ce4100-lapic.yaml
diff --git a/Documentation/devicetree/bindings/interrupt-controller/intel,ce4100-ioapic.txt b/Documentation/devicetree/bindings/interrupt-controller/intel,ce4100-ioapic.txt
deleted file mode 100644
index 7d19f494f19a..000000000000
--- a/Documentation/devicetree/bindings/interrupt-controller/intel,ce4100-ioapic.txt
+++ /dev/null
@@ -1,26 +0,0 @@
-Interrupt chips
----------------
-
-* Intel I/O Advanced Programmable Interrupt Controller (IO APIC)
-
- Required properties:
- --------------------
- compatible = "intel,ce4100-ioapic";
- #interrupt-cells = <2>;
-
- Device's interrupt property:
-
- interrupts = <P S>;
-
- The first number (P) represents the interrupt pin which is wired to the
- IO APIC. The second number (S) represents the sense of interrupt which
- should be configured and can be one of:
- 0 - Edge Rising
- 1 - Level Low
- 2 - Level High
- 3 - Edge Falling
-
-* Local APIC
- Required property:
-
- compatible = "intel,ce4100-lapic";
diff --git a/Documentation/devicetree/bindings/interrupt-controller/intel,ce4100-ioapic.yaml b/Documentation/devicetree/bindings/interrupt-controller/intel,ce4100-ioapic.yaml
new file mode 100644
index 000000000000..25d549220c2a
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/intel,ce4100-ioapic.yaml
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/interrupt-controller/intel,ce4100-ioapic.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Intel I/O Advanced Programmable Interrupt Controller (IO APIC)
+
+maintainers:
+ - Rahul Tanwar <rtanwar@...linear.com>
+
+
+description: |
+ Intel's Advanced Programmable Interrupt Controller (APIC) is a
+ family of interrupt controllers. The APIC is a split
+ architecture design, with a local component (LAPIC) integrated
+ into the processor itself and an external I/O APIC. Local APIC
+ (lapic) receives interrupts from the processor's interrupt pins,
+ from internal sources and from an external I/O APIC (ioapic).
+ And it sends these to the processor core for handling.
+ See [1] Chapter 8 for more details.
+
+ Many of the Intel's generic devices like hpet, ioapic, lapic have
+ the ce4100 name in their compatible property names because they
+ first appeared in CE4100 SoC.
+
+ This schema defines bindings for I/O APIC interrupt controller.
+
+ [1] https://pdos.csail.mit.edu/6.828/2008/readings/ia32/IA32-3A.pdf
+
+properties:
+ compatible:
+ const: intel,ce4100-ioapic
+
+ reg:
+ maxItems: 1
+
+ interrupt-controller: true
+
+ '#interrupt-cells':
+ const: 2
+
+ interrupts:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - interrupt-controller
+ - '#interrupt-cells'
+
+additionalProperties: false
+
+examples:
+ - |
+ ioapic1: interrupt-controller@...00000 {
+ compatible = "intel,ce4100-ioapic";
+ reg = <0xfec00000 0x1000>;
+ #interrupt-cells = <2>;
+ #address-cells = <0>;
+ interrupt-controller;
+ };
diff --git a/Documentation/devicetree/bindings/interrupt-controller/intel,ce4100-lapic.yaml b/Documentation/devicetree/bindings/interrupt-controller/intel,ce4100-lapic.yaml
new file mode 100644
index 000000000000..88f320ef4616
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/intel,ce4100-lapic.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/interrupt-controller/intel,ce4100-lapic.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Intel Local Advanced Programmable Interrupt Controller (LAPIC)
+
+maintainers:
+ - Rahul Tanwar <rtanwar@...linear.com>
+
+
+description: |
+ Intel's Advanced Programmable Interrupt Controller (APIC) is a
+ family of interrupt controllers. The APIC is a split
+ architecture design, with a local component (LAPIC) integrated
+ into the processor itself and an external I/O APIC. Local APIC
+ (lapic) receives interrupts from the processor's interrupt pins,
+ from internal sources and from an external I/O APIC (ioapic).
+ And it sends these to the processor core for handling.
+ See [1] Chapter 8 for more details.
+
+ Many of the Intel's generic devices like hpet, ioapic, lapic have
+ the ce4100 name in their compatible property names because they
+ first appeared in CE4100 SoC.
+
+ This schema defines bindings for local APIC interrupt controller.
+
+ [1] https://pdos.csail.mit.edu/6.828/2008/readings/ia32/IA32-3A.pdf
+
+properties:
+ compatible:
+ const: intel,ce4100-lapic
+
+ reg:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ lapic0: interrupt-controller@...00000 {
+ compatible = "intel,ce4100-lapic";
+ reg = <0xfee00000 0x1000>;
+ };
--
2.17.1
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