From patchwork Mon Nov 21 12:29:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Naresh Solanki X-Patchwork-Id: 23710 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:f944:0:0:0:0:0 with SMTP id q4csp1555662wrr; Mon, 21 Nov 2022 04:31:29 -0800 (PST) X-Google-Smtp-Source: AA0mqf4VgQsIFb/OvIJcwBFG5RtsymCEO+LbRZj9gKW9TwCkf1c5hCWsxZyDck8LxjqhtCMnuwYV X-Received: by 2002:a17:906:3a4c:b0:7ae:4f8f:36c with SMTP id a12-20020a1709063a4c00b007ae4f8f036cmr14891026ejf.137.1669033889304; Mon, 21 Nov 2022 04:31:29 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1669033889; cv=none; d=google.com; s=arc-20160816; b=XcoYBuaGYeMsSwnjle+ozfeeULONNlU4f1Zg1keP8hXKEpnRxedjWwD7cDDQ97saa4 3QSPFzQ4efzZJE0uGosk3u7GKUgifg8fWNVvisCiNhyjPCjeYd2+W98Y7XW1d7XVyEL3 sgbyF0BxUhYpbPIo5KvMYcT4aidCwLwQktzIQzHYRtDLPdHKJPnz61AdOoLebfHA3wL/ 3VWhCiog+vkeFSYJKFzMpOTVJyhFm9wna0hYd4aYSQxtSaQvwmG3U9ZkkUNSXIC4e3S9 3S7fWQA7EVVeuLdcvlwJEpp0hc1Bz28aCojGQMjSD0RdxezL5eDbTHahJ+6GkwcFNKQp ZlDA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=5BRaWwAMGebNoGykx3XuMu8YkZSBESQuLHrSVaFuRcM=; b=RfL+InXkzw5yvcsll3ljP2S4mG3hR0uNdfnWcZpb3viaYFhNnQe7Rv+34Qdqmvvonn a5FtAz2h/enQqJu3QEmV20mZ5sUSRRnDU8P/Cyqdgi/JnrP/ZRx/zopQjFuhTUzp2tYC dMN2eWcJP4RsalHUpIzx+qCi5R4HpiMAE5dfND4HbMqAB3Q7n++Gzl1Szu+7ehbPD43u gasC2BfsTmpaT3eMHgh/MrCRKhVYvBFfZN8XghjwVCtWJuXfUTdIdfZ9p9psl8Se9PnE vrS9qEJsvlwGjmvgi12YkJ1qYDLzq4qiX8WyZpJ5kTIJ+pmZFEtsoWYZ5uIAbP2AARne LZOA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@9elements.com header.s=google header.b=RQoFUkkW; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=9elements.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id k9-20020a17090646c900b0077b4248b138si7196985ejs.127.2022.11.21.04.30.59; Mon, 21 Nov 2022 04:31:29 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@9elements.com header.s=google header.b=RQoFUkkW; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=9elements.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231368AbiKUMaE (ORCPT + 99 others); Mon, 21 Nov 2022 07:30:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45658 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230362AbiKUM3p (ORCPT ); Mon, 21 Nov 2022 07:29:45 -0500 Received: from mail-wm1-x335.google.com (mail-wm1-x335.google.com [IPv6:2a00:1450:4864:20::335]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5E8DA617D for ; Mon, 21 Nov 2022 04:29:44 -0800 (PST) Received: by mail-wm1-x335.google.com with SMTP id ja4-20020a05600c556400b003cf6e77f89cso10504249wmb.0 for ; Mon, 21 Nov 2022 04:29:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=9elements.com; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=5BRaWwAMGebNoGykx3XuMu8YkZSBESQuLHrSVaFuRcM=; b=RQoFUkkW5Zx+3GW0+cbvDbjfe6jWvx0d95QAlTBP9aNW4JxOqt08+yGXfc9Szu/UiO EoWV0RzB/Smh33j+4JaDeq/dwMXFkrlj8vbSd/cMoCcsbbJv/kVhS0Hb06eM9dQLWYpL MiFV8/OHF5i+f4jkObyBv7PY3Vc8XcqNTX7k09HOTv6TrIWdfTCV7Z6Y8GAfT8ccAC5z 3BfqiysK9T4rHwKnmtB/4gtYKAKq4JvcFEUSqwey5IN1MrbLBeX0wxCOLwN4V3tRAAcu kBB8nTv4s3zuFXxxNHjGkm2mFCjm5plLyqrDWjiYt/TzhfXToP6Bu96fTQ7FgPmLycud /nLg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=5BRaWwAMGebNoGykx3XuMu8YkZSBESQuLHrSVaFuRcM=; b=Y3nyTfC4LimyPH8anViVFEjgS7hJUQ47vcOhn7mpr1IL7uNvslNfuGMmlBuxqquoBZ wVlKs6MqfENDLo5z70IWGy5lKuYfYmKPXxMbfOXPN2G5Krwrq7o3apP3xiPcr2z9xq6w YA8WWQ3DfV3/LQqfqDRO5WrjDOgauVTTDVc98o/x1pP25VEQGZRntYacwvRvR3dmIAju Jy6Ipmlq5NlvG7wY5HaykUZTEsMrb8JEClQBqccxEqal3KQwtW0KVeGy86fdjEBugi0g aQQbCB+9CwmSdIo4rPAUHjekc/jhOOMT98LwWBI7mClltN5b3T/xnbOe/lFOBdrqYwRk i7iQ== X-Gm-Message-State: ANoB5pn5zskdScseH/hBANT1b7rOlnBiA2atwfXXUVN8nTaXdFEapKI4 Z45LnU40USfZOAElgAT19PIJlw== X-Received: by 2002:a05:600c:3ac9:b0:3cf:cfc8:9450 with SMTP id d9-20020a05600c3ac900b003cfcfc89450mr12332597wms.99.1669033782910; Mon, 21 Nov 2022 04:29:42 -0800 (PST) Received: from stroh80.sec.9e.network (ip-078-094-000-051.um19.pools.vodafone-ip.de. [78.94.0.51]) by smtp.gmail.com with ESMTPSA id dn12-20020a05600c654c00b003cf6c2f9513sm13929015wmb.2.2022.11.21.04.29.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Nov 2022 04:29:42 -0800 (PST) From: Naresh Solanki X-Google-Original-From: Naresh Solanki To: devicetree@vger.kernel.org, Guenter Roeck , Jean Delvare , Rob Herring , Krzysztof Kozlowski , Naresh Solanki Cc: linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, Patrick Rudolph , Naresh Solanki Subject: [PATCH v7 1/4] dt-bindings: hwmon: fan: Add fan binding to schema Date: Mon, 21 Nov 2022 13:29:29 +0100 Message-Id: <20221121122932.2493174-2-Naresh.Solanki@9elements.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221121122932.2493174-1-Naresh.Solanki@9elements.com> References: <20221121122932.2493174-1-Naresh.Solanki@9elements.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1750108879523128171?= X-GMAIL-MSGID: =?utf-8?q?1750108879523128171?= Add common fan properties bindings to a schema. Bindings for fan controllers can reference the common schema for the fan child nodes: patternProperties: "^fan@[0-2]": type: object $ref: fan-common.yaml# Signed-off-by: Naresh Solanki --- .../devicetree/bindings/hwmon/fan-common.yaml | 47 +++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/fan-common.yaml diff --git a/Documentation/devicetree/bindings/hwmon/fan-common.yaml b/Documentation/devicetree/bindings/hwmon/fan-common.yaml new file mode 100644 index 000000000000..0535d37624cc --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/fan-common.yaml @@ -0,0 +1,47 @@ +# SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/hwmon/fan-common.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Common fan properties + +maintainers: + - Naresh Solanki + +properties: + max-rpm: + description: + Max RPM supported by fan. + $ref: /schemas/types.yaml#/definitions/uint32 + + min-rpm: + description: + Min RPM supported by fan. + $ref: /schemas/types.yaml#/definitions/uint32 + + pulses-per-revolution: + description: + The number of pulse from fan sensor per revolution. + $ref: /schemas/types.yaml#/definitions/uint32 + + target-rpm: + description: + Target RPM the fan should be configured during driver probe. + $ref: /schemas/types.yaml#/definitions/uint32 + + pwms: + description: + PWM provider. + + label: + description: + Optional fan label + + fan-supply: + description: + Power supply for fan. + +additionalProperties: true + +... From patchwork Mon Nov 21 12:29:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Naresh Solanki X-Patchwork-Id: 23711 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:f944:0:0:0:0:0 with SMTP id q4csp1555681wrr; Mon, 21 Nov 2022 04:31:31 -0800 (PST) X-Google-Smtp-Source: AA0mqf6lf/S4Tq+QStIvGKZyMTBBhZ80QK9AtCDjWay4B4eClKonJSrktKLvB5fzFn8n4R5iD7KK X-Received: by 2002:a17:906:3385:b0:7a2:b352:a0d3 with SMTP id v5-20020a170906338500b007a2b352a0d3mr14865569eja.399.1669033890980; Mon, 21 Nov 2022 04:31:30 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1669033890; cv=none; d=google.com; s=arc-20160816; b=s+j4XCPwSUFgZ7UmhML+HyNXI0iZ+EyaflL7ydWwILWKrUYzBn9x0XQZPJiqhPqIKk x9HmUIkS9letxX3q5kQApFIMf01QHXsBhVg8XqxDOPMX7mLK2lvqBJaC+iO9Dc6GaMHX rygeKcuaNHyecgwQI/d6/qSoY2USpkzjZJu9FC7ww+EH0RW8NcM5pXHek4AN7DykI3V8 MQzT0VLQJ4H6dRMAfgP8FNIgT9C6nc/uS3RjPJ8NMAkNWteRGAEylkg6yC047gI9d3F7 JN3nuQH5lo0YxT4ll+JlmTBzVYUO5zndskANzRJuqFhsz4rTJci0cgLjxVS/m9PFqWX3 pRLQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=LXBfYsOqYyi9DKVQGkMLwQ+xTrxC76f34l8uPcGALOo=; b=GMIbNVggOU0yzW55Ke28YuxSLxds1Gj9HhhaFhKuvxx/j/NDwF1OyPtQscyBzWaAFF 9EypK/crVasbj0fbQOJab4q3W4tYvZ9xiqlvQwfD4u8viy9dQSqhUm8saOipbleESW7+ CFTKic5x6clQnFgAEp6LVeDZ+pv1Cl89od3rXzDg4U3kCmpyHvX5xqFeUjJD/44hVlnW Jw5XEpmssd4jx9LdKKpsOLXeqFDv3O9VXrs1mSnPpDaa7Ugspsqr/4FWaO/5AaMR9pU2 Tjuf+7Uu5cGbHZboBS7OoDbYO2gtDLBkKwrSFgVCQGel3x0oXMZyFkZPrkejZSoyXMdZ Zf0w== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@9elements.com header.s=google header.b=JELAQz9M; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=9elements.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id g13-20020a056402090d00b004595af54eacsi9498515edz.226.2022.11.21.04.31.00; Mon, 21 Nov 2022 04:31:30 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@9elements.com header.s=google header.b=JELAQz9M; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=9elements.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231130AbiKUMaK (ORCPT + 99 others); Mon, 21 Nov 2022 07:30:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46966 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230385AbiKUM3r (ORCPT ); Mon, 21 Nov 2022 07:29:47 -0500 Received: from mail-wm1-x32b.google.com (mail-wm1-x32b.google.com [IPv6:2a00:1450:4864:20::32b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C9E82B4835 for ; Mon, 21 Nov 2022 04:29:45 -0800 (PST) Received: by mail-wm1-x32b.google.com with SMTP id ja4-20020a05600c556400b003cf6e77f89cso10504291wmb.0 for ; Mon, 21 Nov 2022 04:29:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=9elements.com; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=LXBfYsOqYyi9DKVQGkMLwQ+xTrxC76f34l8uPcGALOo=; b=JELAQz9MAi4uoy37dZHiOh6XxDEGeav/bvF7KWRnDdXtW3YYxBvyM9i4stLeQf29oa D7CT7JDQHuOP64oZeTGLhI3wSeUEA1P1CMbCFZw2/ciE9n08k1ihXvrOXlpAY+rPDAuf 4SF+73wlTsCY1GjT2ss5727qzCo0oG6RPZFVk+BAu4xnCL9LrWafZZtMd+oazhnMOuRm gTsxDhUqh7BBrTafnsAEWNASSH+kPWPNhUatZ4TzKbbI4Dy0yOv6a2T4/lKAYBrlogJm W5zcwt3yuI9HLfohrG5vLj011t5rud8Zu/34Op6+Sbnwx1cRjRZIyvCul03eJtpUYwke cWcw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=LXBfYsOqYyi9DKVQGkMLwQ+xTrxC76f34l8uPcGALOo=; b=uqj/Rum2N/jHQa50k2z2oNuoB8fuiir3cPz52P72X7ZUO2qDeSNZQE+ThEKL2iimj2 M/GabZ9ihgF1a1PZnx4r5cHH/nhfzDadRpnnDvPsALnjofrqE7rNtYsxYWqmF0An6nZ0 KHObE8sgMvWiu8dqVZ8JCaxOcAEqXh34z17nzpPWuwnsBGQTOzmAYg7W3WAL9AF54mQi SENahHrL2NQCw4zesKT29PUQToRrhlfWBxWGoLkDmOO/j3luVQ+jvodySNPa24zjuIoe f8vvTHVSz+JYl/DGsYN0ON7lGBvQALurBxOLPggDuLhLVdY2Vl4+9RbSwkodmuGIjjU3 Calw== X-Gm-Message-State: ANoB5pmsNFTe5oUMT/7h9i9TOy95vlYGCWc7XPkktZRs3x1BXHMrAWPz eLlY618bt6XV4BJiNQkOZvl/xg== X-Received: by 2002:a05:600c:3b0c:b0:3cf:8df2:63b7 with SMTP id m12-20020a05600c3b0c00b003cf8df263b7mr15705649wms.11.1669033784349; Mon, 21 Nov 2022 04:29:44 -0800 (PST) Received: from stroh80.sec.9e.network (ip-078-094-000-051.um19.pools.vodafone-ip.de. [78.94.0.51]) by smtp.gmail.com with ESMTPSA id dn12-20020a05600c654c00b003cf6c2f9513sm13929015wmb.2.2022.11.21.04.29.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Nov 2022 04:29:43 -0800 (PST) From: Naresh Solanki X-Google-Original-From: Naresh Solanki To: devicetree@vger.kernel.org, Guenter Roeck , Jean Delvare , Rob Herring , Krzysztof Kozlowski , Roland Stigge Cc: linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, Patrick Rudolph , Marcello Sylvester Bauer , Naresh Solanki Subject: [PATCH v7 2/4] dt-bindings: hwmon: Add binding for max6639 Date: Mon, 21 Nov 2022 13:29:30 +0100 Message-Id: <20221121122932.2493174-3-Naresh.Solanki@9elements.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221121122932.2493174-1-Naresh.Solanki@9elements.com> References: <20221121122932.2493174-1-Naresh.Solanki@9elements.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1750108881512901587?= X-GMAIL-MSGID: =?utf-8?q?1750108881512901587?= From: Marcello Sylvester Bauer Add Devicetree binding documentation for Maxim MAX6639 temperature monitor with PWM fan-speed controller. Signed-off-by: Marcello Sylvester Bauer Signed-off-by: Naresh Solanki --- .../bindings/hwmon/maxim,max6639.yaml | 93 +++++++++++++++++++ 1 file changed, 93 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/maxim,max6639.yaml diff --git a/Documentation/devicetree/bindings/hwmon/maxim,max6639.yaml b/Documentation/devicetree/bindings/hwmon/maxim,max6639.yaml new file mode 100644 index 000000000000..da040b11d2ab --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/maxim,max6639.yaml @@ -0,0 +1,93 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- + +$id: http://devicetree.org/schemas/hwmon/maxim,max6639.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Maxim max6639 + +maintainers: + - Roland Stigge + +description: | + The MAX6639 is a 2-channel temperature monitor with dual, automatic, PWM + fan-speed controller. It monitors its own temperature and one external + diode-connected transistor or the temperatures of two external diode-connected + transistors, typically available in CPUs, FPGAs, or GPUs. + + Datasheets: + https://datasheets.maximintegrated.com/en/ds/MAX6639-MAX6639F.pdf + +properties: + compatible: + enum: + - maxim,max6639 + + reg: + maxItems: 1 + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + '#pwm-cells': + const: 3 + +required: + - compatible + - reg + +patternProperties: + "^fan@[0-1]$": + type: object + description: | + Represents the two fans and their specific configuration. + + $ref: fan-common.yaml# + + properties: + reg: + description: | + The fan number. + items: + minimum: 0 + maximum: 1 + + required: + - reg + +additionalProperties: false + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + fan1: fan-controller@10 { + compatible = "maxim,max6639"; + reg = <0x10>; + #address-cells = <1>; + #size-cells = <0>; + #pwm-cells = <3>; + + fan@0 { + reg = <0x0>; + pulses-per-revolution = <2>; + max-rpm = <4000>; + target-rpm = <1000>; + pwms = <&fan1 0 25000 0>; + }; + + fan@1 { + reg = <0x1>; + pulses-per-revolution = <2>; + max-rpm = <8000>; + pwms = <&fan1 1 25000 0>; + }; + }; + }; +... From patchwork Mon Nov 21 12:29:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Naresh Solanki X-Patchwork-Id: 23712 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:f944:0:0:0:0:0 with SMTP id q4csp1555676wrr; Mon, 21 Nov 2022 04:31:30 -0800 (PST) X-Google-Smtp-Source: AA0mqf7lneXAeb0DvA13uBlOwlFfrm1lev6626SkmNFJjNdeUWcSnFqNA5YQaD20Fs3mtCL1hTtD X-Received: by 2002:a50:f602:0:b0:469:4e4f:4827 with SMTP id c2-20020a50f602000000b004694e4f4827mr7983985edn.214.1669033890718; Mon, 21 Nov 2022 04:31:30 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1669033890; cv=none; d=google.com; s=arc-20160816; b=gurK/IJIFYoNVZtlmIXVs7v+EPHesOo5YCkRKOeOw9kqJRsuSm0f2A+Ql+ha0LsvWf ND1GHWRiIcBXbrRR8PNzkGK2DSAo0vtRwwBITzh8RSeEBhAntIP4pbN+IGLyka5pgFn/ ZK9mVY4dC5p9WG6IFMsaggZ39L+twVj2qAhhNC31wmarzhWdHIGLx6n5TdiPSdywtomk bMvnIIhmFKPnE9KjFLMS2ova7BLU2o2e1FyokJKTtogpE+JoN8n/VDBg2hdUvDRbXKJt qp6v/VvXTfdx2bdX7tvjh268EDWRy04kXWNaRuxPGp8pk6zOEntDNjlE2nFlsG8e95ui 7ijg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=4sZJN35ods+Qowc2iCb3TEaJfa54ky/OFZY2lgkGNrc=; b=IBDu8VVj3X5GKRU6XtZYBMilDFJ9bBNZ9yJ4VSI68+F3uVZqOvsEB+oXZQEsdEiSZK 9JMhjIRw3k+To7dkTAA33VcAaPX5jZycql7cXse0OJYmyDD4MN6ql1JuUpeMDON7akRn wwSLCLIBdKNzvUKa7gujwvl4c6NO4OxjWvtFggzqjXBrLUEXDJpX0i/txoDvwXOCaHfz ZrKZyMLsdpWjRfgsgwiPx5uw3yYhBxEovZJwSV6le/mOBJqNxxDnzKRDcpIbHz8sDOnH Nyhr92QMHghCAnN2fHRtQqUMylRRIzn92u4j61MVIvYOqUFpqyWd+CdpJHdCmzEhUy3w QkpA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@9elements.com header.s=google header.b=e7AJD8Un; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=9elements.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id w2-20020a056402268200b00468eee7250csi3963034edd.510.2022.11.21.04.31.00; Mon, 21 Nov 2022 04:31:30 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@9elements.com header.s=google header.b=e7AJD8Un; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=9elements.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231234AbiKUMaQ (ORCPT + 99 others); Mon, 21 Nov 2022 07:30:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46968 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230432AbiKUM3t (ORCPT ); Mon, 21 Nov 2022 07:29:49 -0500 Received: from mail-wm1-x329.google.com (mail-wm1-x329.google.com [IPv6:2a00:1450:4864:20::329]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3310F56EC4 for ; Mon, 21 Nov 2022 04:29:47 -0800 (PST) Received: by mail-wm1-x329.google.com with SMTP id v124-20020a1cac82000000b003cf7a4ea2caso12626711wme.5 for ; Mon, 21 Nov 2022 04:29:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=9elements.com; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=4sZJN35ods+Qowc2iCb3TEaJfa54ky/OFZY2lgkGNrc=; b=e7AJD8UnpRNjowdB/gRYlQ89bcIeX3qRJACQjIm9D3ZzhICuK7XSPAvZjAr89Q8BKM l/76T0x/12/WoGJpooOeRTEZ4NnGvodn0R+2trLP06/iqWqywNIy4L7eRZepb239Wmw0 hnT7yu/sU53G9TYX33LwLg/D24jeZSqGCsEdJcPJk/pk3ZlnIAqg+wEk8+x8OZHW3Ylf OOFwK6WwvpEAeW8QnBXc4/stj+vxg/8AiIFKZWCF8LzCexXR8jCMx0pb+yfZFwRGgYR+ SvZSUtkGXd9T+ooEAV0TpeyR/W6H9M+nxpET/pQ4efp8KPUEgAbsMXTroW7IT1k4Y4jC r9Tw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=4sZJN35ods+Qowc2iCb3TEaJfa54ky/OFZY2lgkGNrc=; b=5O9ciebR1ldTixuSeyVmsdpMlHFdR/liKY93MleCHewGFeLTv4THK61rIHQSjDnRZg PXekhI60OUn+6eds5etK4d6N62pEPP4RNJTwy0w3z7Qw5Vum7ckbxjNuQlZjNYCkk+gO gF+/mh5IT8PbxFtLlnXIaqMbZlxelE88HdSsm0Fok4ZknGGviPOvLFhZchaAj3sZ6Xnr 4gvbxaRMRUaVksn6VqGjaeYK43I7EADj/yvh2N3tcwbEs5fBtOvEB40ksKyA021ECNSi fvWBubSUEf65ELFRd5oDqg7Av886fuQUJtZ8iPULDPqrQ1KyW6ps8MJS2DH7MHLWC81A I9YQ== X-Gm-Message-State: ANoB5pnDCsx9USgA4ADOfhfYebfu1wKwAGigD8Wt19IR+hdt/uNdBI8Z WK8OGiw1Re7Ox08GSxqLPMT0aw== X-Received: by 2002:a05:600c:4194:b0:3cf:5080:412c with SMTP id p20-20020a05600c419400b003cf5080412cmr15381772wmh.99.1669033785708; Mon, 21 Nov 2022 04:29:45 -0800 (PST) Received: from stroh80.sec.9e.network (ip-078-094-000-051.um19.pools.vodafone-ip.de. [78.94.0.51]) by smtp.gmail.com with ESMTPSA id dn12-20020a05600c654c00b003cf6c2f9513sm13929015wmb.2.2022.11.21.04.29.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Nov 2022 04:29:45 -0800 (PST) From: Naresh Solanki X-Google-Original-From: Naresh Solanki To: devicetree@vger.kernel.org, Guenter Roeck , Jean Delvare Cc: linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, Patrick Rudolph , Naresh Solanki , Marcello Sylvester Bauer Subject: [PATCH v7 3/4] hwmon: (max6639) Change from pdata to dt configuration Date: Mon, 21 Nov 2022 13:29:31 +0100 Message-Id: <20221121122932.2493174-4-Naresh.Solanki@9elements.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221121122932.2493174-1-Naresh.Solanki@9elements.com> References: <20221121122932.2493174-1-Naresh.Solanki@9elements.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1750108880705519221?= X-GMAIL-MSGID: =?utf-8?q?1750108880705519221?= max6639_platform_data is not used by any in-kernel driver and does not address the MAX6639 fans separately. Move to device tree configuration with explicit properties to configure each fan. Signed-off-by: Marcello Sylvester Bauer Signed-off-by: Naresh Solanki --- drivers/hwmon/max6639.c | 246 +++++++++++++++++++------- include/linux/platform_data/max6639.h | 15 -- 2 files changed, 178 insertions(+), 83 deletions(-) delete mode 100644 include/linux/platform_data/max6639.h diff --git a/drivers/hwmon/max6639.c b/drivers/hwmon/max6639.c index 9b895402c80d..feafa3511297 100644 --- a/drivers/hwmon/max6639.c +++ b/drivers/hwmon/max6639.c @@ -19,7 +19,6 @@ #include #include #include -#include /* Addresses to scan */ static const unsigned short normal_i2c[] = { 0x2c, 0x2e, 0x2f, I2C_CLIENT_END }; @@ -54,9 +53,12 @@ static const unsigned short normal_i2c[] = { 0x2c, 0x2e, 0x2f, I2C_CLIENT_END }; #define MAX6639_GCONFIG_PWM_FREQ_HI 0x08 #define MAX6639_FAN_CONFIG1_PWM 0x80 - +#define MAX6639_REG_FAN_CONFIG2a_PWM_POL 0x02 #define MAX6639_FAN_CONFIG3_THERM_FULL_SPEED 0x40 +#define MAX6639_FAN_CONFIG3_FREQ_MASK 0x03 +#define MAX6639_REG_TARGTDUTY_SLOT 120 +/* Tach supported range. This internally controls tach frequency */ static const int rpm_ranges[] = { 2000, 4000, 8000, 16000 }; #define FAN_FROM_REG(val, rpm_range) ((val) == 0 || (val) == 255 ? \ @@ -76,18 +78,21 @@ struct max6639_data { u16 temp[2]; /* Temperature, in 1/8 C, 0..255 C */ bool temp_fault[2]; /* Detected temperature diode failure */ u8 fan[2]; /* Register value: TACH count for fans >=30 */ + u32 target_rpm[2]; + u32 max_rpm[2]; + u8 pwm[2]; + u8 status; /* Detected channel alarms and fan failures */ /* Register values only written to */ - u8 pwm[2]; /* Register value: Duty cycle 0..120 */ u8 temp_therm[2]; /* THERM Temperature, 0..255 C (->_max) */ u8 temp_alert[2]; /* ALERT Temperature, 0..255 C (->_crit) */ u8 temp_ot[2]; /* OT Temperature, 0..255 C (->_emergency) */ /* Register values initialized only once */ - u8 ppr; /* Pulses per rotation 0..3 for 1..4 ppr */ - u8 rpm_range; /* Index in above rpm_ranges table */ - + u8 ppr[2]; /* Pulses per rotation 0..3 for 1..4 ppr */ + u8 rpm_range[2]; /* Index in above rpm_ranges table */ + u8 pwm_polarity[2]; /* Optional regulator for FAN supply */ struct regulator *reg; }; @@ -282,6 +287,7 @@ static ssize_t pwm_show(struct device *dev, struct device_attribute *dev_attr, struct max6639_data *data = dev_get_drvdata(dev); return sprintf(buf, "%d\n", data->pwm[attr->index] * 255 / 120); + } static ssize_t pwm_store(struct device *dev, @@ -302,10 +308,10 @@ static ssize_t pwm_store(struct device *dev, mutex_lock(&data->update_lock); data->pwm[attr->index] = (u8)(val * 120 / 255); - i2c_smbus_write_byte_data(client, - MAX6639_REG_TARGTDUTY(attr->index), - data->pwm[attr->index]); + i2c_smbus_write_byte_data(client, MAX6639_REG_TARGTDUTY(attr->index), + data->pwm[attr->index]); mutex_unlock(&data->update_lock); + return count; } @@ -319,7 +325,7 @@ static ssize_t fan_input_show(struct device *dev, return PTR_ERR(data); return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index], - data->rpm_range)); + data->rpm_range[attr->index])); } static ssize_t alarm_show(struct device *dev, @@ -386,29 +392,40 @@ static struct attribute *max6639_attrs[] = { ATTRIBUTE_GROUPS(max6639); /* - * returns respective index in rpm_ranges table - * 1 by default on invalid range + * Get respective index in rpm_ranges table */ -static int rpm_range_to_reg(int range) +static int rpm_range_to_index(struct device *dev, u8 *index, int rpm) { - int i; - - for (i = 0; i < ARRAY_SIZE(rpm_ranges); i++) { - if (rpm_ranges[i] == range) - return i; + if (rpm < 0) + return -EINVAL; + + /* Set index based on chip support */ + switch (rpm) { + case 0 ... 2000: + *index = 0; + break; + case 2001 ... 4000: + *index = 1; + break; + case 4001 ... 8000: + *index = 2; + break; + case 8001 ... 16000: + *index = 3; + break; + default: + /* Use max range for higher RPM */ + dev_warn(dev, + "RPM higher than supported range. Default to 16000 RPM"); + *index = 3; } - - return 1; /* default: 4000 RPM */ + return 0; } static int max6639_init_client(struct i2c_client *client, struct max6639_data *data) { - struct max6639_platform_data *max6639_info = - dev_get_platdata(&client->dev); - int i; - int rpm_range = 1; /* default: 4000 RPM */ - int err; + int i, err; /* Reset chip to default values, see below for GCONFIG setup */ err = i2c_smbus_write_byte_data(client, MAX6639_REG_GCONFIG, @@ -416,51 +433,29 @@ static int max6639_init_client(struct i2c_client *client, if (err) goto exit; - /* Fans pulse per revolution is 2 by default */ - if (max6639_info && max6639_info->ppr > 0 && - max6639_info->ppr < 5) - data->ppr = max6639_info->ppr; - else - data->ppr = 2; - data->ppr -= 1; - - if (max6639_info) - rpm_range = rpm_range_to_reg(max6639_info->rpm_range); - data->rpm_range = rpm_range; - for (i = 0; i < 2; i++) { /* Set Fan pulse per revolution */ - err = i2c_smbus_write_byte_data(client, - MAX6639_REG_FAN_PPR(i), - data->ppr << 6); + err = i2c_smbus_write_byte_data(client, MAX6639_REG_FAN_PPR(i), + data->ppr[i] << 6); if (err) goto exit; /* Fans config PWM, RPM */ err = i2c_smbus_write_byte_data(client, - MAX6639_REG_FAN_CONFIG1(i), - MAX6639_FAN_CONFIG1_PWM | rpm_range); - if (err) - goto exit; - - /* Fans PWM polarity high by default */ - if (max6639_info && max6639_info->pwm_polarity == 0) - err = i2c_smbus_write_byte_data(client, - MAX6639_REG_FAN_CONFIG2a(i), 0x00); - else - err = i2c_smbus_write_byte_data(client, - MAX6639_REG_FAN_CONFIG2a(i), 0x02); + MAX6639_REG_FAN_CONFIG1(i), + MAX6639_FAN_CONFIG1_PWM | + data->rpm_range[i]); if (err) goto exit; /* - * /THERM full speed enable, + * /THERM full speed disable, * PWM frequency 25kHz, see also GCONFIG below */ err = i2c_smbus_write_byte_data(client, - MAX6639_REG_FAN_CONFIG3(i), - MAX6639_FAN_CONFIG3_THERM_FULL_SPEED | 0x03); + MAX6639_REG_FAN_CONFIG3(i), + 0x03); if (err) goto exit; @@ -469,31 +464,34 @@ static int max6639_init_client(struct i2c_client *client, data->temp_alert[i] = 90; data->temp_ot[i] = 100; err = i2c_smbus_write_byte_data(client, - MAX6639_REG_THERM_LIMIT(i), - data->temp_therm[i]); + MAX6639_REG_THERM_LIMIT(i), + data->temp_therm[i]); if (err) goto exit; err = i2c_smbus_write_byte_data(client, - MAX6639_REG_ALERT_LIMIT(i), - data->temp_alert[i]); + MAX6639_REG_ALERT_LIMIT(i), + data->temp_alert[i]); if (err) goto exit; err = i2c_smbus_write_byte_data(client, - MAX6639_REG_OT_LIMIT(i), data->temp_ot[i]); + MAX6639_REG_OT_LIMIT(i), + data->temp_ot[i]); if (err) goto exit; /* PWM 120/120 (i.e. 100%) */ - data->pwm[i] = 120; - err = i2c_smbus_write_byte_data(client, - MAX6639_REG_TARGTDUTY(i), data->pwm[i]); + data->pwm[i] = data->target_rpm[i]; + err = i2c_smbus_write_byte_data(client, MAX6639_REG_TARGTDUTY(i), data->pwm[i]); + if (err) goto exit; + } /* Start monitoring */ err = i2c_smbus_write_byte_data(client, MAX6639_REG_GCONFIG, MAX6639_GCONFIG_DISABLE_TIMEOUT | MAX6639_GCONFIG_CH2_LOCAL | MAX6639_GCONFIG_PWM_FREQ_HI); + exit: return err; } @@ -524,12 +522,95 @@ static void max6639_regulator_disable(void *data) regulator_disable(data); } +static int max6639_probe_child_from_dt(struct i2c_client *client, + struct device_node *child, + struct max6639_data *data) + +{ + struct device *dev = &client->dev; + u32 i, maxrpm; + int val, err; + + err = of_property_read_u32(child, "reg", &i); + if (err) { + dev_err(dev, "missing reg property of %pOFn\n", child); + return err; + } + + if (i >= 2) { + dev_err(dev, "invalid reg %d of %pOFn\n", i, child); + return -EINVAL; + } + + err = of_property_read_u32(child, "pulses-per-revolution", &val); + if (err) { + dev_err(dev, "missing pulses-per-revolution property of %pOFn", + child); + return err; + } + + if (val < 0 || val > 5) { + dev_err(dev, "invalid pulses-per-revolution %d of %pOFn\n", val, + child); + return -EINVAL; + } + data->ppr[i] = val; + + err = of_property_read_u32(child, "max-rpm", &maxrpm); + if (err) { + dev_err(dev, "missing max-rpm property of %pOFn\n", child); + return err; + } + + err = rpm_range_to_index(dev, &data->rpm_range[i], maxrpm); + if (err) { + dev_err(dev, "invalid max-rpm %d of %pOFn\n", maxrpm, child); + return err; + } + data->max_rpm[i] = maxrpm; + + err = of_property_read_u32(child, "target-rpm", &val); + /* Use provided target RPM else default to maxrpm */ + if (!err) + data->target_rpm[i] = val; + else + data->target_rpm[i] = maxrpm; + + return 0; +} + +static int max6639_probe_from_dt(struct i2c_client *client, + struct max6639_data *data) +{ + struct device *dev = &client->dev; + const struct device_node *np = dev->of_node; + struct device_node *child; + int err; + + /* Compatible with non-DT platforms */ + if (!np) + return 0; + + for_each_child_of_node(np, child) { + if (strcmp(child->name, "fan")) + continue; + + err = max6639_probe_child_from_dt(client, child, data); + if (err) { + of_node_put(child); + return err; + } + } + + return 0; +} + static int max6639_probe(struct i2c_client *client) { struct device *dev = &client->dev; struct max6639_data *data; struct device *hwmon_dev; - int err; + int err, i; data = devm_kzalloc(dev, sizeof(struct max6639_data), GFP_KERNEL); if (!data) @@ -539,9 +620,11 @@ static int max6639_probe(struct i2c_client *client) data->reg = devm_regulator_get_optional(dev, "fan"); if (IS_ERR(data->reg)) { - if (PTR_ERR(data->reg) != -ENODEV) - return PTR_ERR(data->reg); - + if (PTR_ERR(data->reg) != -ENODEV) { + err = (int)PTR_ERR(data->reg); + return dev_err_probe(dev, err, + "Failed looking up fan supply\n"); + } data->reg = NULL; } else { /* Spin up fans */ @@ -560,6 +643,22 @@ static int max6639_probe(struct i2c_client *client) mutex_init(&data->update_lock); + /* Below are defaults later overridden by DT properties */ + for (i = 0; i < 2; i++) { + /* 4000 RPM */ + data->rpm_range[i] = 1; + data->ppr[i] = 2; + /* Max. temp. 80C/90C/100C */ + data->temp_therm[i] = 80; + data->temp_alert[i] = 90; + data->temp_ot[i] = 100; + } + + /* Probe from DT to get configuration */ + err = max6639_probe_from_dt(client, data); + if (err) + return err; + /* Initialize the max6639 chip */ err = max6639_init_client(client, data); if (err < 0) @@ -571,6 +670,7 @@ static int max6639_probe(struct i2c_client *client) return PTR_ERR_OR_ZERO(hwmon_dev); } +#if IS_ENABLED(CONFIG_PM_SLEEP) static int max6639_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); @@ -608,6 +708,7 @@ static int max6639_resume(struct device *dev) return i2c_smbus_write_byte_data(client, MAX6639_REG_GCONFIG, ret & ~MAX6639_GCONFIG_STANDBY); } +#endif static const struct i2c_device_id max6639_id[] = { {"max6639", 0}, @@ -616,13 +717,22 @@ static const struct i2c_device_id max6639_id[] = { MODULE_DEVICE_TABLE(i2c, max6639_id); -static DEFINE_SIMPLE_DEV_PM_OPS(max6639_pm_ops, max6639_suspend, max6639_resume); +#ifdef CONFIG_OF +static const struct of_device_id maxim_of_platform_match[] = { + {.compatible = "maxim,max6639"}, + {}, +}; +MODULE_DEVICE_TABLE(of, maxim_of_platform_match); +#endif + +static SIMPLE_DEV_PM_OPS(max6639_pm_ops, max6639_suspend, max6639_resume); static struct i2c_driver max6639_driver = { .class = I2C_CLASS_HWMON, .driver = { .name = "max6639", .pm = pm_sleep_ptr(&max6639_pm_ops), + .of_match_table = of_match_ptr(maxim_of_platform_match), }, .probe_new = max6639_probe, .id_table = max6639_id, diff --git a/include/linux/platform_data/max6639.h b/include/linux/platform_data/max6639.h deleted file mode 100644 index 65bfdb4fdc15..000000000000 --- a/include/linux/platform_data/max6639.h +++ /dev/null @@ -1,15 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _LINUX_MAX6639_H -#define _LINUX_MAX6639_H - -#include - -/* platform data for the MAX6639 temperature sensor and fan control */ - -struct max6639_platform_data { - bool pwm_polarity; /* Polarity low (0) or high (1, default) */ - int ppr; /* Pulses per rotation 1..4 (default == 2) */ - int rpm_range; /* 2000, 4000 (default), 8000 or 16000 */ -}; - -#endif /* _LINUX_MAX6639_H */ From patchwork Mon Nov 21 12:29:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Naresh Solanki X-Patchwork-Id: 23713 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:f944:0:0:0:0:0 with SMTP id q4csp1555732wrr; Mon, 21 Nov 2022 04:31:37 -0800 (PST) X-Google-Smtp-Source: AA0mqf6/r/bu74gM6ha/eVpSp31mC0DdXpCcughOVLLLBYRLfRgwuYfoFwrCCKCjZ8uMcK7uB/8g X-Received: by 2002:a05:6402:1f14:b0:461:c7ef:b09e with SMTP id b20-20020a0564021f1400b00461c7efb09emr2642989edb.58.1669033897482; Mon, 21 Nov 2022 04:31:37 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1669033897; cv=none; d=google.com; s=arc-20160816; b=O+h5HyJPFMNAU6rNBEfAr5ljTt4neDGIwfmtdy6aM5vlIyiC2K1OXi8GtaFxFLi0Es 2pNOg1bEiJhsGXGv8R5urdbrtaX5Ei6lQMfrjG5sCVn/9Sy4oFKAS/OkWZE58WpbJz93 zx+be57Ri4pM6w6+AZo5woVZwe4WoCsT3gYmC3ghQ+22CRloB7HzcCLuOKyK0zP1YF2C 6VNMrzOydvScddl8FkXXLi6U7Jx1kavBZg/X12LgoYohyOD3Lqk3vYAjFE1VoXPP+Hai zvdBuD6B66juPldz5Y9ufxCTUXFwdMKa1oen0er8rR+MOeo2bUXRYA5SvhZNWWM/iusP OlCQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=42FU8QS0Q4hrQTp2XxYMrcn/SR5rM3XxkeVj0MMdKrY=; b=MU+AeUz+7UiHlKQVG4wY1hZUazZm8cij9c8ZDFKaQS7U3NOACFRmLLAgIW367sgEgb xaWj32yfcaQZzQZv5Ki8vCJEnoz5gEd+EsmOtfu1hoCJ3cAseworyF86bGfX9yW6CtVX TczSc3P44FfSCBxxFzoZl+0zFj1GO9qbgDTMab68EM4EkKNBh/uRxq9jWhTCf5jDJTWI i2tUsm8q0wY1TBH0A5h4cyANdPMQU/x9mbjJdJk24RPuWoxouSFugbinTz1j6D+HzdNi M/eKK05etF0lKlCA8WAZL31FrKiwQUnhJWbZnJkvPh/TYQ3WikidtonKfIitcZiofRU9 JrUQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@9elements.com header.s=google header.b=dG3v2v4P; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=9elements.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id m9-20020a056402510900b0045b965cf1dasi9880558edd.175.2022.11.21.04.31.03; Mon, 21 Nov 2022 04:31:37 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@9elements.com header.s=google header.b=dG3v2v4P; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=9elements.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231465AbiKUMaU (ORCPT + 99 others); Mon, 21 Nov 2022 07:30:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47012 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230507AbiKUM3u (ORCPT ); Mon, 21 Nov 2022 07:29:50 -0500 Received: from mail-wm1-x334.google.com (mail-wm1-x334.google.com [IPv6:2a00:1450:4864:20::334]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7207FB4073 for ; Mon, 21 Nov 2022 04:29:48 -0800 (PST) Received: by mail-wm1-x334.google.com with SMTP id t1so8344051wmi.4 for ; Mon, 21 Nov 2022 04:29:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=9elements.com; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=42FU8QS0Q4hrQTp2XxYMrcn/SR5rM3XxkeVj0MMdKrY=; b=dG3v2v4PjTz3kjJE8b9TPnYKKcmh+t6AdR/E6kkhSDOyF0l3dEYN1LvO7Yw13zZ3C3 nAgtV9V4Nbn+SYFKBt6/Vi8tOoSIw1Q+tNPf8Ugd28kJpg/mNPmFZAWLxuRoWcfrK1dC R9WiCDKi2HcxotAgCk/y5w+rf/1Q7/HSqmkdI3R5dTESWTODdiiY6b7iApygXC9fh4v2 kdo1YJpDeRrpDKdimUhqn4OMnGwNh9wYLi21x0qedlEoLRmyTBfdNY4CrLhA0TvwRhTp x7VmyiXQHsyD97xthh0aBXQrWWyOYY7J2FgL47/UlpWZYuY4MhEJUYqAaXyFUZM9zv6E hy3w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=42FU8QS0Q4hrQTp2XxYMrcn/SR5rM3XxkeVj0MMdKrY=; b=xcQG7VICeOwzaB2849bdmF7RVlFZudPhxVW4WGXoRD41fySg5MeN0v5+A4afzcN4sM OKdDOGcPcFKOBj+XvtA5kB4t93RJz9SGcsy3bvLuuHsbbI5YRi0II2ZYrgUsCngeIQPm TPJC+tgnYVurPbM6OwXehBd1vqmnYhnlpLQg3zooQs8H911/hx66q9tncZloh4ZZEkZs hF3ou9GhOnZh1zWxd/VeVAWIY9orG+Yh1yllDJQaxKkgAyBrHAx4nUGZPETsKEIWwOxy 9fLZT5J/yl3lF+LZwcQBEF36eKbQRFacoJ+zg5ovhFPv94QjnrLNtDa5MUNuQLbqhItq B5Cw== X-Gm-Message-State: ANoB5pnLSIF9Htm89+1NPlYNTsCHa89Y1h/wzu2/UxI50X5jKJGEcUDO M8NioTQM1g9a49h/p5x+zeRTqQ== X-Received: by 2002:a7b:cd85:0:b0:3cf:931c:3cfa with SMTP id y5-20020a7bcd85000000b003cf931c3cfamr3726623wmj.203.1669033786957; Mon, 21 Nov 2022 04:29:46 -0800 (PST) Received: from stroh80.sec.9e.network (ip-078-094-000-051.um19.pools.vodafone-ip.de. [78.94.0.51]) by smtp.gmail.com with ESMTPSA id dn12-20020a05600c654c00b003cf6c2f9513sm13929015wmb.2.2022.11.21.04.29.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Nov 2022 04:29:46 -0800 (PST) From: Naresh Solanki X-Google-Original-From: Naresh Solanki To: devicetree@vger.kernel.org, Guenter Roeck , Jean Delvare , Thierry Reding , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= Cc: linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, Patrick Rudolph , Naresh Solanki , linux-pwm@vger.kernel.org Subject: [PATCH v7 4/4] hwmon: (max6639) Add pwm support Date: Mon, 21 Nov 2022 13:29:32 +0100 Message-Id: <20221121122932.2493174-5-Naresh.Solanki@9elements.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221121122932.2493174-1-Naresh.Solanki@9elements.com> References: <20221121122932.2493174-1-Naresh.Solanki@9elements.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1750108887593935068?= X-GMAIL-MSGID: =?utf-8?q?1750108887593935068?= Add pwm support for max6639. Also configure pwm fan speed based on pwm provided in DT. Signed-off-by: Naresh Solanki --- drivers/hwmon/Kconfig | 1 + drivers/hwmon/max6639.c | 229 +++++++++++++++++++++++++++++++++++++--- 2 files changed, 216 insertions(+), 14 deletions(-) diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 3176c33af6c6..56d9004b7a38 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1115,6 +1115,7 @@ config SENSORS_MAX6621 config SENSORS_MAX6639 tristate "Maxim MAX6639 sensor chip" depends on I2C + depends on PWM help If you say yes here you get support for the MAX6639 sensor chips. diff --git a/drivers/hwmon/max6639.c b/drivers/hwmon/max6639.c index feafa3511297..5bfeee35abf0 100644 --- a/drivers/hwmon/max6639.c +++ b/drivers/hwmon/max6639.c @@ -19,6 +19,7 @@ #include #include #include +#include /* Addresses to scan */ static const unsigned short normal_i2c[] = { 0x2c, 0x2e, 0x2f, I2C_CLIENT_END }; @@ -61,6 +62,10 @@ static const unsigned short normal_i2c[] = { 0x2c, 0x2e, 0x2f, I2C_CLIENT_END }; /* Tach supported range. This internally controls tach frequency */ static const int rpm_ranges[] = { 2000, 4000, 8000, 16000 }; +/* Supported PWM frequency */ +static const unsigned int freq_table[] = { 20, 33, 50, 100, 5000, 8333, 12500, + 25000 }; + #define FAN_FROM_REG(val, rpm_range) ((val) == 0 || (val) == 255 ? \ 0 : (rpm_ranges[rpm_range] * 30) / (val)) #define TEMP_LIMIT_TO_REG(val) clamp_val((val) / 1000, 0, 255) @@ -78,9 +83,9 @@ struct max6639_data { u16 temp[2]; /* Temperature, in 1/8 C, 0..255 C */ bool temp_fault[2]; /* Detected temperature diode failure */ u8 fan[2]; /* Register value: TACH count for fans >=30 */ + struct pwm_device *pwmd[2]; /* max6639 has two pwm device */ u32 target_rpm[2]; u32 max_rpm[2]; - u8 pwm[2]; u8 status; /* Detected channel alarms and fan failures */ @@ -92,9 +97,10 @@ struct max6639_data { /* Register values initialized only once */ u8 ppr[2]; /* Pulses per rotation 0..3 for 1..4 ppr */ u8 rpm_range[2]; /* Index in above rpm_ranges table */ - u8 pwm_polarity[2]; /* Optional regulator for FAN supply */ struct regulator *reg; + /* max6639 pwm chip */ + struct pwm_chip chip; }; static struct max6639_data *max6639_update_device(struct device *dev) @@ -285,8 +291,11 @@ static ssize_t pwm_show(struct device *dev, struct device_attribute *dev_attr, { struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr); struct max6639_data *data = dev_get_drvdata(dev); + struct pwm_state state; + + pwm_get_state(data->pwmd[attr->index], &state); - return sprintf(buf, "%d\n", data->pwm[attr->index] * 255 / 120); + return sprintf(buf, "%d\n", pwm_get_relative_duty_cycle(&state, 255)); } @@ -296,9 +305,9 @@ static ssize_t pwm_store(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr); struct max6639_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; unsigned long val; int res; + struct pwm_state state; res = kstrtoul(buf, 10, &val); if (res) @@ -306,11 +315,11 @@ static ssize_t pwm_store(struct device *dev, val = clamp_val(val, 0, 255); - mutex_lock(&data->update_lock); - data->pwm[attr->index] = (u8)(val * 120 / 255); - i2c_smbus_write_byte_data(client, MAX6639_REG_TARGTDUTY(attr->index), - data->pwm[attr->index]); - mutex_unlock(&data->update_lock); + pwm_get_state(data->pwmd[attr->index], &state); + pwm_set_relative_duty_cycle(&state, val, 255); + res = pwm_apply_state(data->pwmd[attr->index], &state); + if (res) + return res; return count; } @@ -426,6 +435,7 @@ static int max6639_init_client(struct i2c_client *client, struct max6639_data *data) { int i, err; + struct pwm_state state; /* Reset chip to default values, see below for GCONFIG setup */ err = i2c_smbus_write_byte_data(client, MAX6639_REG_GCONFIG, @@ -479,10 +489,11 @@ static int max6639_init_client(struct i2c_client *client, if (err) goto exit; - /* PWM 120/120 (i.e. 100%) */ - data->pwm[i] = data->target_rpm[i]; - err = i2c_smbus_write_byte_data(client, MAX6639_REG_TARGTDUTY(i), data->pwm[i]); - + /* Configure PWM controller */ + pwm_get_state(data->pwmd[i], &state); + pwm_set_relative_duty_cycle(&state, data->target_rpm[i], + data->max_rpm[i]); + err = pwm_apply_state(data->pwmd[i], &state); if (err) goto exit; @@ -576,7 +587,22 @@ static int max6639_probe_child_from_dt(struct i2c_client *client, else data->target_rpm[i] = maxrpm; - return 0; + /* Get pwms property for PWM control */ + data->pwmd[i] = devm_fwnode_pwm_get(dev, &child->fwnode, NULL); + + if (!IS_ERR(data->pwmd[i])) + return 0; + + if (PTR_ERR(data->pwmd[i]) == -EPROBE_DEFER) + return PTR_ERR(data->pwmd[i]); + + dev_dbg(dev, "Using chip default PWM"); + data->pwmd[i] = pwm_request_from_chip(&data->chip, i, NULL); + if (!IS_ERR(data->pwmd[i])) + return 0; + + dev_dbg(dev, "Failed to configure pwm for fan %d", i); + return PTR_ERR_OR_ZERO(data->pwmd[i]); } static int max6639_probe_from_dt(struct i2c_client *client, @@ -605,6 +631,172 @@ static int max6639_probe_from_dt(struct i2c_client *client, return 0; } +static struct max6639_data *to_max6639_pwm(struct pwm_chip *chip) +{ + return container_of(chip, struct max6639_data, chip); +} + +static void max6639_pwm_get_state(struct pwm_chip *chip, + struct pwm_device *pwm, + struct pwm_state *state) +{ + + struct max6639_data *data = to_max6639_pwm(chip); + struct i2c_client *client = data->client; + int value, i = pwm->hwpwm, x; + unsigned int freq; + + mutex_lock(&data->update_lock); + + value = i2c_smbus_read_byte_data(client, MAX6639_REG_FAN_CONFIG1(i)); + if (value < 0) + goto abort; + + if (value & MAX6639_FAN_CONFIG1_PWM) { + state->enabled = true; + + /* Determine frequency from respective registers */ + value = i2c_smbus_read_byte_data(client, + MAX6639_REG_FAN_CONFIG3(i)); + if (value < 0) + goto abort; + x = value & MAX6639_FAN_CONFIG3_FREQ_MASK; + + value = i2c_smbus_read_byte_data(client, MAX6639_REG_GCONFIG); + if (value < 0) + goto abort; + if (value & MAX6639_GCONFIG_PWM_FREQ_HI) + x |= 0x4; + x &= 0x7; + freq = freq_table[x]; + + state->period = DIV_ROUND_UP(NSEC_PER_SEC, freq); + + value = i2c_smbus_read_byte_data(client, + MAX6639_REG_TARGTDUTY(i)); + if (value < 0) + goto abort; + /* max6639 supports 120 slots only */ + state->duty_cycle = mul_u64_u32_div(state->period, value, 120); + + value = i2c_smbus_read_byte_data(client, + MAX6639_REG_FAN_CONFIG2a(i)); + if (value < 0) + goto abort; + value &= MAX6639_REG_FAN_CONFIG2a_PWM_POL; + state->polarity = (value != 0); + } else + state->enabled = false; + +abort: + mutex_unlock(&data->update_lock); + +} + +static int max6639_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, + const struct pwm_state *state) +{ + struct max6639_data *data = to_max6639_pwm(chip); + struct i2c_client *client = data->client; + int value = 0, i = pwm->hwpwm, x; + unsigned int freq; + struct pwm_state cstate; + + cstate = pwm->state; + + mutex_lock(&data->update_lock); + + if (state->period != cstate.period) { + /* Configure frequency */ + freq = DIV_ROUND_UP_ULL(NSEC_PER_SEC, state->period); + /* Chip supports limited number of frequency */ + for (x = 0; x < sizeof(freq_table); x++) + if (freq <= freq_table[x]) + break; + + value = i2c_smbus_read_byte_data(client, + MAX6639_REG_FAN_CONFIG3(i)); + if (value < 0) + goto abort; + value &= ~MAX6639_FAN_CONFIG3_FREQ_MASK; + value |= (x & MAX6639_FAN_CONFIG3_FREQ_MASK); + value = i2c_smbus_write_byte_data(client, + MAX6639_REG_FAN_CONFIG3(i), + value); + + value = i2c_smbus_read_byte_data(client, MAX6639_REG_GCONFIG); + if (value < 0) + goto abort; + + if (x >> 2) + value &= ~MAX6639_GCONFIG_PWM_FREQ_HI; + else + value |= MAX6639_GCONFIG_PWM_FREQ_HI; + value = i2c_smbus_write_byte_data(client, MAX6639_REG_GCONFIG, + value); + if (value < 0) + goto abort; + } + + /* Configure dutycycle */ + if (state->duty_cycle != cstate.duty_cycle || + state->period != cstate.period) { + value = DIV_ROUND_DOWN_ULL( + state->duty_cycle * MAX6639_REG_TARGTDUTY_SLOT, + state->period); + value = i2c_smbus_write_byte_data(client, + MAX6639_REG_TARGTDUTY(i), + value); + if (value < 0) + goto abort; + } + + /* Configure polarity */ + if (state->polarity != cstate.polarity) { + value = i2c_smbus_read_byte_data(client, + MAX6639_REG_FAN_CONFIG2a(i)); + if (value < 0) + goto abort; + if (state->polarity == PWM_POLARITY_NORMAL) + value |= MAX6639_REG_FAN_CONFIG2a_PWM_POL; + else + value &= ~MAX6639_REG_FAN_CONFIG2a_PWM_POL; + value = i2c_smbus_write_byte_data(client, + MAX6639_REG_FAN_CONFIG2a(i), + value); + if (value < 0) + goto abort; + } + + if (state->enabled == cstate.enabled) + goto abort; + + value = i2c_smbus_read_byte_data(client, MAX6639_REG_FAN_CONFIG1(i)); + if (value < 0) + goto abort; + if (state->enabled) + value |= MAX6639_FAN_CONFIG1_PWM; + else + value &= ~MAX6639_FAN_CONFIG1_PWM; + + value = i2c_smbus_write_byte_data(client, MAX6639_REG_FAN_CONFIG1(i), + value); + if (value < 0) + goto abort; + value = 0; + +abort: + mutex_unlock(&data->update_lock); + + return value; +} + +static const struct pwm_ops max6639_pwm_ops = { + .apply = max6639_pwm_apply, + .get_state = max6639_pwm_get_state, + .owner = THIS_MODULE, +}; + static int max6639_probe(struct i2c_client *client) { struct device *dev = &client->dev; @@ -618,6 +810,15 @@ static int max6639_probe(struct i2c_client *client) data->client = client; + /* Add PWM controller of max6639 */ + data->chip.dev = dev; + data->chip.ops = &max6639_pwm_ops; + data->chip.npwm = 2; + + err = devm_pwmchip_add(dev, &data->chip); + if (err < 0) + return dev_err_probe(dev, err, "failed to add PWM chip\n"); + data->reg = devm_regulator_get_optional(dev, "fan"); if (IS_ERR(data->reg)) { if (PTR_ERR(data->reg) != -ENODEV) {