[PATCH v8 1/2] dt-bindings: timer: Add bindings for Intel Keem Bay SoC Timer

shruthi.sanil
2022-02-22T09:57:06Z

From: Shruthi Sanil <shruthi.sanil@intel.com>

Add Device Tree bindings for the Timer IP, which can be used as
clocksource and clockevent device in the Intel Keem Bay SoC.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Shruthi Sanil <shruthi.sanil@intel.com>
---
.../bindings/timer/intel,keembay-timer.yaml | 128 ++++++++++++++++++
1 file changed, 128 insertions(+)
create mode 100644 Documentation/devicetree/bindings/timer/intel,keembay-timer.yaml

diff --git a/Documentation/devicetree/bindings/timer/intel,keembay-timer.yaml b/Documentation/devicetree/bindings/timer/intel,keembay-timer.yaml
new file mode 100644
index 000000000000..9e6d46ecc2dc
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/intel,keembay-timer.yaml
@@ -0,0 +1,128 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/intel,keembay-timer.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Intel Keem Bay SoC Timers
+
+maintainers:
+ - Shruthi Sanil <shruthi.sanil@intel.com>
+
+description: |
+ The Intel Keem Bay timer driver supports 1 free running counter and 8 timers.
+ Each timer is capable of generating inividual interrupt.
+ Both the features are enabled through the timer general config register.
+
+ The parent node represents the common general configuration details and
+ the child nodes represents the counter and timers.
+
+properties:
+ compatible:
+ oneOf:
+ - items:
+ - enum:
+ - intel,keembay-gpt-creg
+ - const: simple-mfd
+
+ reg:
+ description: General configuration register address and length.
+ maxItems: 1
+
+ ranges: true
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 1
+
+required:
+ - compatible
+ - reg
+ - ranges
+ - "#address-cells"
+ - "#size-cells"
+
+patternProperties:
+ "^counter@[0-9a-f]+$":
+ description: Properties for Intel Keem Bay counter.
+ type: object
+ properties:
+ compatible:
+ oneOf:
+ - items:
+ - enum:
+ - intel,keembay-counter
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ required:
+ - compatible
+ - reg
+ - clocks
+
+ "^timer@[0-9a-f]+$":
+ description: Properties for Intel Keem Bay timer
+ type: object
+ properties:
+ compatible:
+ oneOf:
+ - items:
+ - enum:
+ - intel,keembay-timer
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #define KEEM_BAY_A53_TIM
+
+ soc {
+ #address-cells = <0x2>;
+ #size-cells = <0x2>;
+
+ gpt@20331000 {
+ compatible = "intel,keembay-gpt-creg", "simple-mfd";
+ reg = <0x0 0x20331000 0x0 0xc>;
+ ranges = <0x0 0x0 0x20330000 0xF0>;
+ #address-cells = <0x1>;
+ #size-cells = <0x1>;
+
+ counter@e8 {
+ compatible = "intel,keembay-counter";
+ reg = <0xe8 0x8>;
+ clocks = <&scmi_clk KEEM_BAY_A53_TIM>;
+ };
+
+ timer@30 {
+ compatible = "intel,keembay-timer";
+ reg = <0x30 0xc>;
+ interrupts = <GIC_SPI 0x5 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&scmi_clk KEEM_BAY_A53_TIM>;
+ };
+ };
+ };
+
+...
--
2.17.1