From patchwork Tue Apr 4 17:38:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Ciocaltea X-Patchwork-Id: 13200725 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 356D7C77B6E for ; Tue, 4 Apr 2023 17:39:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=sGVbTBQM1haj2+/h3yzKyjuM6vMIfZQsHDUmZZhh6I8=; b=419y8UwBVUCHjL IrAvO7eTwHjVKIqWFXaz3fGK5CLpUMJjcjHQt76ZOcwqv3yKwfP/a9G+aVQMWLD5BFgfgMfFD3U9L yS8UTRqo//yvOuvaN/xmK0e5ypTySU8sHLQRbFAsWHAeymVox4/8by+g9xsoOf9MeOxYvVB3m+/y3 k4wKRQ/R1P3l0Eov8qYU9OppyHU5Jt/SvBTBr93R8381V9FrSUFPY6uMaCDhnd47hs0GSSpEWQWXL hptsAlixKPMy08NjxgwDX42grdDepGeYj9K5TOX9v0P20a5KAWd9pBPSRuXHR6rKsUb6orw+QuutV q+PjUKWLyDJn26B/DZmQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pjkbu-002P95-38; Tue, 04 Apr 2023 17:38:22 +0000 Received: from madras.collabora.co.uk ([2a00:1098:0:82:1000:25:2eeb:e5ab]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pjkbp-002P6d-2B; Tue, 04 Apr 2023 17:38:19 +0000 Received: from localhost (unknown [188.27.34.213]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: cristicc) by madras.collabora.co.uk (Postfix) with ESMTPSA id CE2826603182; Tue, 4 Apr 2023 18:38:13 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1680629894; bh=KlijjLio97ihQkNKbDD0GN+ulVNt3WEfM5CnliYI74Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BVOB663gd/3mWfkxeUPSy0gPJN5Th6yxPq+eOYx1JKWzP9jGf5BdrataBkOfnmtUy eMnhIZWUYep9Et9AGLsYBHnuVvTSt+tnVsfr1fJ6V04NWjQYd0Dn/FEat1g9ZRHhjY 1l6xsMqYHBrSx8Q63UmcuxDAS5MWwDtHc2bgTe7LfTs4XBJoPTKR+cEDaJu+U/JQI3 iPKPmqusdWF2qq235soKndZn1f9RWt6f2rGwusI8MootKSREVtq38re/3gPWJpHWTo 6VY0++NYCCPsbTAhgUBhfB5I/EBxpLex4EjNquNlLwwmWdCCIkBkmJFlQtN6W6sEYY TxqsR1KjqUOJg== From: Cristian Ciocaltea To: Jean Delvare , Guenter Roeck , Rob Herring , Krzysztof Kozlowski , Heiko Stuebner Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, kernel@collabora.com Subject: [PATCH v2 1/2] dt-bindings: hwmon: pwm-fan: Convert to DT schema Date: Tue, 4 Apr 2023 20:38:06 +0300 Message-Id: <20230404173807.490520-2-cristian.ciocaltea@collabora.com> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230404173807.490520-1-cristian.ciocaltea@collabora.com> References: <20230404173807.490520-1-cristian.ciocaltea@collabora.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230404_103817_980133_307F1D1F X-CRM114-Status: GOOD ( 20.61 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Convert the PWM fan bindings to DT schema format. Signed-off-by: Cristian Ciocaltea --- .../devicetree/bindings/hwmon/pwm-fan.txt | 68 +--------- .../devicetree/bindings/hwmon/pwm-fan.yaml | 119 ++++++++++++++++++ 2 files changed, 120 insertions(+), 67 deletions(-) create mode 100644 Documentation/devicetree/bindings/hwmon/pwm-fan.yaml diff --git a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt index 4509e688623a..48886f0ce415 100644 --- a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt +++ b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt @@ -1,67 +1 @@ -Bindings for a fan connected to the PWM lines - -Required properties: -- compatible : "pwm-fan" -- pwms : the PWM that is used to control the PWM fan -- cooling-levels : PWM duty cycle values in a range from 0 to 255 - which correspond to thermal cooling states - -Optional properties: -- fan-supply : phandle to the regulator that provides power to the fan -- interrupts : This contains an interrupt specifier for each fan - tachometer output connected to an interrupt source. - The output signal must generate a defined number of - interrupts per fan revolution, which require that - it must be self resetting edge interrupts. See - interrupt-controller/interrupts.txt for the format. -- pulses-per-revolution : define the number of pulses per fan revolution for - each tachometer input as an integer (default is 2 - interrupts per revolution). The value must be - greater than zero. - -Example: - fan0: pwm-fan { - compatible = "pwm-fan"; - #cooling-cells = <2>; - pwms = <&pwm 0 10000 0>; - cooling-levels = <0 102 170 230>; - }; - - thermal-zones { - cpu_thermal: cpu-thermal { - thermal-sensors = <&tmu 0>; - polling-delay-passive = <0>; - polling-delay = <0>; - trips { - cpu_alert1: cpu-alert1 { - temperature = <100000>; /* millicelsius */ - hysteresis = <2000>; /* millicelsius */ - type = "passive"; - }; - }; - cooling-maps { - map0 { - trip = <&cpu_alert1>; - cooling-device = <&fan0 0 1>; - }; - }; - }; - -Example 2: - fan0: pwm-fan { - compatible = "pwm-fan"; - pwms = <&pwm 0 40000 0>; - fan-supply = <®_fan>; - interrupt-parent = <&gpio5>; - interrupts = <1 IRQ_TYPE_EDGE_FALLING>; - pulses-per-revolution = <2>; - }; - -Example 3: - fan0: pwm-fan { - compatible = "pwm-fan"; - pwms = <&pwm1 0 25000 0>; - interrupts-extended = <&gpio1 1 IRQ_TYPE_EDGE_FALLING>, - <&gpio2 5 IRQ_TYPE_EDGE_FALLING>; - pulses-per-revolution = <2>, <1>; - }; +This file has moved to pwm-fan.yaml. diff --git a/Documentation/devicetree/bindings/hwmon/pwm-fan.yaml b/Documentation/devicetree/bindings/hwmon/pwm-fan.yaml new file mode 100644 index 000000000000..048b6ea794c7 --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/pwm-fan.yaml @@ -0,0 +1,119 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/hwmon/pwm-fan.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Fan connected to PWM lines + +maintainers: + - Jean Delvare + - Guenter Roeck + +properties: + compatible: + const: pwm-fan + + cooling-levels: + description: PWM duty cycle values corresponding to thermal cooling states. + items: + maximum: 255 + $ref: /schemas/types.yaml#/definitions/uint32-array + + fan-supply: + description: Phandle to the regulator that provides power to the fan. + + interrupts: + description: + This contains an interrupt specifier for each fan tachometer output + connected to an interrupt source. The output signal must generate a + defined number of interrupts per fan revolution, which require that + it must be self resetting edge interrupts. + minItems: 1 + maxItems: 5 + + pulses-per-revolution: + description: + Define the number of pulses per fan revolution for each tachometer + input as an integer. + items: + minimum: 1 + maximum: 4 + default: 2 + minItems: 1 + maxItems: 5 + $ref: /schemas/types.yaml#/definitions/uint32-array + + pwms: + description: The PWM that is used to control the fan. + maxItems: 1 + + pwm-names: true + + "#cooling-cells": + description: + Must be 2, in order to specify minimum and maximum cooling state used in + the cooling-maps reference. The first cell is the minimum cooling state + and the second cell is the maximum cooling state requested. + const: 2 + +required: + - compatible + - pwms + +additionalProperties: false + +examples: + - | + pwm-fan { + compatible = "pwm-fan"; + cooling-levels = <0 102 170 230>; + pwms = <&pwm 0 10000 0>; + #cooling-cells = <2>; + }; + + thermal-zones { + cpu_thermal: cpu-thermal { + thermal-sensors = <&tmu 0>; + polling-delay-passive = <0>; + polling-delay = <0>; + + trips { + cpu_alert1: cpu-alert1 { + temperature = <100000>; /* millicelsius */ + hysteresis = <2000>; /* millicelsius */ + type = "passive"; + }; + }; + + cooling-maps { + map0 { + trip = <&cpu_alert1>; + cooling-device = <&fan0 0 1>; + }; + }; + }; + }; + + - | + #include + + pwm-fan { + compatible = "pwm-fan"; + pwms = <&pwm 0 40000 0>; + fan-supply = <®_fan>; + interrupt-parent = <&gpio5>; + interrupts = <1 IRQ_TYPE_EDGE_FALLING>; + pulses-per-revolution = <2>; + }; + + - | + #include + + pwm-fan { + compatible = "pwm-fan"; + pwms = <&pwm1 0 25000 0>; + interrupts-extended = <&gpio1 1 IRQ_TYPE_EDGE_FALLING>, + <&gpio2 5 IRQ_TYPE_EDGE_FALLING>; + pulses-per-revolution = <2>, <1>; + };