Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 97 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/timer/arm,sp804.yaml b/Documentation/devicetree/bindings/timer/arm,sp804.yaml
new file mode 100644
index 000000000..960e2bd66
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+++ b/Documentation/devicetree/bindings/timer/arm,sp804.yaml
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+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/arm,sp804.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ARM sp804 Dual Timers
+
+maintainers:
+  - Haojian Zhuang <haojian.zhuang@linaro.org>
+
+description: |+
+  The Arm SP804 IP implements two independent timers, configurable for
+  16 or 32 bit operation and capable of running in one-shot, periodic, or
+  free-running mode. The input clock is shared, but can be gated and prescaled
+  independently for each timer.
+
+  There is a viriant of Arm SP804: Hisilicon 64-bit SP804 timer. Some Hisilicon
+  SoCs, such as Hi1212, should use the dedicated compatible: "hisilicon,sp804".
+
+# Need a custom select here or 'arm,primecell' will match on lots of nodes
+select:
+  properties:
+    compatible:
+      contains:
+        oneOf:
+          - const: arm,sp804
+          - const: hisilicon,sp804
+  required:
+    - compatible
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - arm,sp804
+          - hisilicon,sp804
+      - const: arm,primecell
+
+  interrupts:
+    description: |
+      If two interrupts are listed, those are the interrupts for timer
+      1 and 2, respectively. If there is only a single interrupt, it is
+      either a combined interrupt or the sole interrupt of one timer, as
+      specified by the "arm,sp804-has-irq" property.
+    minItems: 1
+    maxItems: 2
+
+  reg:
+    description: The physical base address of the SP804 IP.
+    maxItems: 1
+
+  clocks:
+    description: |
+      Clocks driving the dual timer hardware. This list should
+      be 1 or 3 clocks. With 3 clocks, the order is timer0 clock, timer1
+      clock, apb_pclk. A single clock can also be specified if the same
+      clock is used for all clock inputs.
+    oneOf:
+      - items:
+          - description: clock for timer 1
+          - description: clock for timer 2
+          - description: bus clock
+      - items:
+          - description: unified clock for both timers and the bus
+
+  clock-names: true
+    # The original binding did not specify any clock names, and there is no
+    # consistent naming used in the existing DTs. The primecell binding
+    # requires the "apb_pclk" name, so we need this property.
+    # Use "timer0clk", "timer1clk", "apb_pclk" for new DTs.
+
+  arm,sp804-has-irq:
+    description: If only one interrupt line is connected to the interrupt
+      controller, this property specifies which timer is connected to this
+      line.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 1
+    maximum: 2
+
+required:
+  - compatible
+  - interrupts
+  - reg
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    timer0: timer@fc800000 {
+        compatible = "arm,sp804", "arm,primecell";
+        reg = <0xfc800000 0x1000>;
+        interrupts = <0 0 4>, <0 1 4>;
+        clocks = <&timclk1>, <&timclk2>, <&pclk>;
+        clock-names = "timer1", "timer2", "apb_pclk";
+    };