[PATCH v2 2/2] dt-bindings: timer: samsung,s5e99xx-mct: Document s5e99xx-mct bindings

From: Youngmin Nam
Date: Mon Nov 01 2021 - 19:45:22 EST


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

Signed-off-by: Youngmin Nam <youngmin.nam@xxxxxxxxxxx>
---
.../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@xxxxxxxxxx>
+
+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@10050000 {
+ 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