linux-kernel - [PATCH v1 2/2] dt-bindings: timer: samsung,s5e99xx-mct: Document s5e99xx-mct bindings

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Message-Id: <20211021061804.39118-3-youngmin.nam@samsung.com>
Date:   Thu, 21 Oct 2021 15:18:04 +0900
From:   Youngmin Nam <youngmin.nam@...sung.com>
To:     krzysztof.kozlowski@...onical.com
Cc:     daniel.lezcano@...aro.org, tglx@...utronix.de,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, pullip.cho@...sung.com,
        hoony.yu@...sung.com, hajun.sung@...sung.com,
        myung-su.cha@...sung.com, Youngmin Nam <youngmin.nam@...sung.com>
Subject: [PATCH v1 2/2] dt-bindings: timer: samsung,s5e99xx-mct: Document
 s5e99xx-mct bindings

Add the MCT version 2 bindings for the s5e99xx SoC from samsung.

Signed-off-by: Youngmin Nam <youngmin.nam@...sung.com>
---
 .../bindings/timer/samsung,s5e99xx-mct.yaml   | 91 +++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/samsung,s5e99xx-mct.yaml

diff --git a/Documentation/devicetree/bindings/timer/samsung,s5e99xx-mct.yaml b/Documentation/devicetree/bindings/timer/samsung,s5e99xx-mct.yaml
new file mode 100644
index 000000000000..c887c7797ca8
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/samsung,s5e99xx-mct.yaml
@@ -0,0 +1,91 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/samsung,s5e99xx-mct.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung Exynos SoC Multi Core Timer (MCT)
+
+maintainers:
+  - Krzysztof Kozlowski <krzk@...nel.org>
+
+description: |+
+  The Samsung's Multi Core Timer (MCT) version 2 module includes
+  one 64-bit FRC(Free Running Counter) and 12 comparators.
+  The FRC serves up-counter and starts running at power-on.
+  The 12 comparators use the FRC value to produce interrupts.
+  They will produce interrupts when their internal value is matched with the FRC value.
+  Theses interrupts can be used as local timer interrupt of each CPU.
+
+properties:
+  compatible:
+    enum:
+      - samsung,s5e99xx-mct
+
+  clocks:
+    items:
+      - description: OSC clock
+      - description: PCLK clock
+      - description: RTC clock(optional)
+    minItems: 2
+
+  clock-names:
+    items:
+      - const: fin_pll
+      - const: mct
+      - const: rtc
+    minItems: 2
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    description: |
+      Interrupts should be put in specific order.
+      0: Local Timer Interrupt 0
+      1: Local Timer Interrupt 1
+      2: Local Timer Interrupt 2
+      3: ..
+      4: ..
+      i: Local Timer Interrupt n
+    minItems: 1              #  1 local timer interrupts
+    maxItems: 12             # 12 local timer interrupts
+
+  div:
+    description: If present, OSC clock freqency will be divided with this value.
+      And the divided value will be provided to MCT module.
+
+required:
+  - compatible
+  - clock-names
+  - clocks
+  - interrupts
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    // In this example, the IP contains 12 local timers, using separate interrupts,
+    // so 12 local timer interrupts have been specified,
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    timer@...50000 {
+        compatible = "samsung,s5e99xx-mct";
+        reg = <0x10050000 0x800>;
+        clocks = <&clock 1>, <&clock 10>;
+        clock-names = "fin_pll", "mct";
+
+        interrupts = <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 59 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 66 IRQ_TYPE_LEVEL_HIGH>;
+    };
-- 
2.33.0