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dt-bindings: atmel-tcb: convert bindings to json-schema
Convert Atmel Timer Counter Blocks bindings to DT schema format using json-schema. Also move it out of mfd as it is not and has never been related to mfd. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Kamel Bouhara <kamel.bouhara@bootlin.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Alexandre Belloni
Jonathan Cameron
parent
d3818c4815
commit
4b88c673cd
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* Device tree bindings for Atmel Timer Counter Blocks
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- compatible: Should be "atmel,<chip>-tcb", "simple-mfd", "syscon".
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<chip> can be "at91rm9200" or "at91sam9x5"
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- reg: Should contain registers location and length
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- #address-cells: has to be 1
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- #size-cells: has to be 0
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- interrupts: Should contain all interrupts for the TC block
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Note that you can specify several interrupt cells if the TC
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block has one interrupt per channel.
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- clock-names: tuple listing input clock names.
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Required elements: "t0_clk", "slow_clk"
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Optional elements: "t1_clk", "t2_clk"
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- clocks: phandles to input clocks.
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The TCB can expose multiple subdevices:
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* a timer
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- compatible: Should be "atmel,tcb-timer"
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- reg: Should contain the TCB channels to be used. If the
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counter width is 16 bits (at91rm9200-tcb), two consecutive
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channels are needed. Else, only one channel will be used.
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Examples:
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One interrupt per TC block:
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tcb0: timer@fff7c000 {
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compatible = "atmel,at91rm9200-tcb", "simple-mfd", "syscon";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0xfff7c000 0x100>;
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interrupts = <18 4>;
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clocks = <&tcb0_clk>, <&clk32k>;
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clock-names = "t0_clk", "slow_clk";
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timer@0 {
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compatible = "atmel,tcb-timer";
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reg = <0>, <1>;
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};
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timer@2 {
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compatible = "atmel,tcb-timer";
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reg = <2>;
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};
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};
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One interrupt per TC channel in a TC block:
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tcb1: timer@fffdc000 {
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compatible = "atmel,at91rm9200-tcb", "simple-mfd", "syscon";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0xfffdc000 0x100>;
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interrupts = <26 4>, <27 4>, <28 4>;
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clocks = <&tcb1_clk>, <&clk32k>;
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clock-names = "t0_clk", "slow_clk";
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};
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@ -0,0 +1,131 @@
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: "http://devicetree.org/schemas/soc/microchip/atmel,at91rm9200-tcb.yaml#"
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$schema: "http://devicetree.org/meta-schemas/core.yaml#"
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title: Atmel Timer Counter Block
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maintainers:
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- Alexandre Belloni <alexandre.belloni@bootlin.com>
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description: |
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The Atmel (now Microchip) SoCs have timers named Timer Counter Block. Each
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timer has three channels with two counters each.
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properties:
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compatible:
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items:
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- enum:
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- atmel,at91rm9200-tcb
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- atmel,at91sam9x5-tcb
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- const: simple-mfd
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- const: syscon
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reg:
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maxItems: 1
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interrupts:
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description:
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List of interrupts. One interrupt per TCB channel if available or one
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interrupt for the TC block
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minItems: 1
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maxItems: 3
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clock-names:
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description:
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List of clock names. Always includes t0_clk and slow clk. Also includes
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t1_clk and t2_clk if a clock per channel is available.
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oneOf:
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- items:
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- const: t0_clk
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- const: slow_clk
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- items:
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- const: t0_clk
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- const: t1_clk
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- const: t2_clk
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- const: slow_clk
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minItems: 2
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maxItems: 4
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clocks:
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minItems: 2
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maxItems: 4
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'#address-cells':
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const: 1
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'#size-cells':
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const: 0
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patternProperties:
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"^timer@[0-2]$":
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description: The timer block channels that are used as timers.
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type: object
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properties:
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compatible:
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const: atmel,tcb-timer
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reg:
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description:
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List of channels to use for this particular timer.
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minItems: 1
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maxItems: 3
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required:
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- compatible
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- reg
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required:
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- compatible
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- reg
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- interrupts
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- clocks
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- clock-names
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- '#address-cells'
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- '#size-cells'
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additionalProperties: false
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examples:
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- |
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/* One interrupt per TC block: */
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tcb0: timer@fff7c000 {
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compatible = "atmel,at91rm9200-tcb", "simple-mfd", "syscon";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0xfff7c000 0x100>;
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interrupts = <18 4>;
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clocks = <&tcb0_clk>, <&clk32k>;
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clock-names = "t0_clk", "slow_clk";
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timer@0 {
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compatible = "atmel,tcb-timer";
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reg = <0>, <1>;
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};
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timer@2 {
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compatible = "atmel,tcb-timer";
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reg = <2>;
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};
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};
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/* One interrupt per TC channel in a TC block: */
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tcb1: timer@fffdc000 {
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compatible = "atmel,at91rm9200-tcb", "simple-mfd", "syscon";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0xfffdc000 0x100>;
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interrupts = <26 4>, <27 4>, <28 4>;
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clocks = <&tcb1_clk>, <&clk32k>;
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clock-names = "t0_clk", "slow_clk";
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timer@0 {
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compatible = "atmel,tcb-timer";
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reg = <0>;
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};
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timer@1 {
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compatible = "atmel,tcb-timer";
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reg = <1>;
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};
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};
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