74164d284b
Pull pwm updates from Thierry Reding: "This contains conversions of some more drivers to the atomic API as well as the addition of new chip support for some existing drivers. There are also various minor fixes and cleanups across the board, from drivers to device tree bindings" * tag 'pwm/for-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (45 commits) pwm: rcar: Simplify multiplication/shift logic dt-bindings: pwm: renesas,tpu: Do not require pwm-cells twice dt-bindings: pwm: tiehrpwm: Do not require pwm-cells twice dt-bindings: pwm: tiecap: Do not require pwm-cells twice dt-bindings: pwm: samsung: Do not require pwm-cells twice dt-bindings: pwm: intel,keembay: Do not require pwm-cells twice dt-bindings: pwm: brcm,bcm7038: Do not require pwm-cells twice dt-bindings: pwm: toshiba,visconti: Include generic PWM schema dt-bindings: pwm: renesas,pwm: Include generic PWM schema dt-bindings: pwm: sifive: Include generic PWM schema dt-bindings: pwm: rockchip: Include generic PWM schema dt-bindings: pwm: mxs: Include generic PWM schema dt-bindings: pwm: iqs620a: Include generic PWM schema dt-bindings: pwm: intel,lgm: Include generic PWM schema dt-bindings: pwm: imx: Include generic PWM schema dt-bindings: pwm: allwinner,sun4i-a10: Include generic PWM schema pwm: pwm-mediatek: Beautify error messages text pwm: pwm-mediatek: Allocate clk_pwms with devm_kmalloc_array pwm: pwm-mediatek: Simplify error handling with dev_err_probe() pwm: brcmstb: Remove useless locking ...
74 lines
2.0 KiB
YAML
74 lines
2.0 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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# Copyright (C) 2020 SiFive, Inc.
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/pwm/pwm-sifive.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: SiFive PWM controller
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maintainers:
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- Sagar Kadam <sagar.kadam@sifive.com>
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- Paul Walmsley <paul.walmsley@sifive.com>
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description:
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Unlike most other PWM controllers, the SiFive PWM controller currently
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only supports one period for all channels in the PWM. All PWMs need to
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run at the same period. The period also has significant restrictions on
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the values it can achieve, which the driver rounds to the nearest
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achievable period. PWM RTL that corresponds to the IP block version
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numbers can be found here -
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https://github.com/sifive/sifive-blocks/tree/master/src/main/scala/devices/pwm
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allOf:
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- $ref: pwm.yaml#
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properties:
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compatible:
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items:
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- enum:
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- sifive,fu540-c000-pwm
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- sifive,fu740-c000-pwm
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- const: sifive,pwm0
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description:
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Should be "sifive,<chip>-pwm" and "sifive,pwm<version>". Supported
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compatible strings are "sifive,fu540-c000-pwm" and
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"sifive,fu740-c000-pwm" for the SiFive PWM v0 as integrated onto the
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SiFive FU540 and FU740 chip respectively, and "sifive,pwm0" for the
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SiFive PWM v0 IP block with no chip integration tweaks.
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Please refer to sifive-blocks-ip-versioning.txt for details.
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reg:
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maxItems: 1
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clocks:
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maxItems: 1
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"#pwm-cells":
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const: 3
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interrupts:
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maxItems: 4
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description:
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Each PWM instance in FU540-C000 has 4 comparators. One interrupt per comparator.
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required:
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- compatible
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- reg
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- clocks
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- interrupts
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additionalProperties: false
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examples:
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- |
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pwm: pwm@10020000 {
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compatible = "sifive,fu540-c000-pwm", "sifive,pwm0";
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reg = <0x10020000 0x1000>;
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clocks = <&tlclk>;
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interrupt-parent = <&plic>;
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interrupts = <42>, <43>, <44>, <45>;
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#pwm-cells = <3>;
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};
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