From patchwork Thu Jun 8 02:18:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Billy Tsai X-Patchwork-Id: 13271549 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 85809C77B7A for ; Thu, 8 Jun 2023 02:53:00 +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:Message-ID:Date:Subject:To :From:Reply-To:Cc:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=Ho1hc9jgef7QIcE0mqY5jYpkqlwDuTrLiz49JcjhHpE=; b=vcTwUthc7pa28k y5eRkSdsA7OR81YIAosMrkMq8aFQrCNbSnBmHuOdE+6yPIFeBTvx/spQsP9pS5h+CEHAPZe1GUjyM GcuIqmCgkVwXJchFbbWH3KtuRY0/umAvrPXmcP/AXSasbn5Ibdypuqgk+xK2ram0YW1A36yyEq37T 43DQmuzRh2tLG11sWqk6GHOGOOo0zGW1qmWePkU9Cn2BJMdeM+LqiBrD16kKf7mOBAxu4000yLhGp N6aY5xZTQNZzIC6hLlXVGZ6vBLA3zcP1Kzpwi/M1CRSkDvFY4OZ7rXkA1pYUsZ5qkqS77yLEB4Qnw 6svJTB4oH8ITn8lfFmhg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q75lQ-007r5x-2D; Thu, 08 Jun 2023 02:52:40 +0000 Received: from mail.aspeedtech.com ([211.20.114.72]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1q75lM-007r3A-0v for linux-arm-kernel@lists.infradead.org; Thu, 08 Jun 2023 02:52:37 +0000 Received: from BillyTsai-pc.aspeed.com (192.168.1.221) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 8 Jun 2023 10:16:21 +0800 From: Billy Tsai To: , , , , , , , , , , , , , , , , , , Subject: [v6 0/4] Support pwm/tach driver for aspeed ast26xx Date: Thu, 8 Jun 2023 10:18:35 +0800 Message-ID: <20230608021839.12769-1-billy_tsai@aspeedtech.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [192.168.1.221] X-ClientProxiedBy: TWMBX02.aspeed.com (192.168.0.24) To TWMBX02.aspeed.com (192.168.0.24) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230607_195236_322312_3DD3FA56 X-CRM114-Status: GOOD ( 14.83 ) 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 Unlike the old design that the register setting of the TACH should based on the configure of the PWM. In ast26xx, the dependency between pwm and tach controller is eliminated and becomes a separate hardware block. One is used to provide pwm output and another is used to monitor the frequency of the input. Therefore, this patch serials implements them by writing the two driver "pwm-aspeed-ast2600.c" and "tach-aspeed-ast2600.c". The former is following the pwm subsystem which can apply the existed driver to controller the fan(pwm-fan.c), beeper(pwm-beeper.c) and so on. The latter is following the sysfs interface of hwmon to creat the node for fan monitor. Changes since v5: - pwm/tach: - Remove the utilization of common resources from the parent node. - Change the concept to 16 PWM/TACH controllers, each with one channel, instead of 1 PWM/TACH controller with 16 channels. - dt-binding: - Eliminate the usage of simple-mfd. Changes since v4: - pwm: - Fix the return type of get_status function. - tach: - read clk source once and re-use it - Remove the constants variables - Allocate tach_channel as array - Use dev->parent - dt-binding: - Fix the order of the patches - Add example and description for tach child node - Remove pwm extension property Changes since v3: - pwm: - Remove unnecessary include header - Fix warning Prefer "GPL" over "GPL v2" - tach: - Remove the paremeter min_rpm and max_rpm and return the tach value directly without any polling or delay. - Fix warning Prefer "GPL" over "GPL v2" - dt-binding: - Replace underscore in node names with dashes - Split per subsystem Changes since v2: - pwm: - Use devm_* api to simplify the error cleanup - Fix the multi-line alignment problem - tach: - Add tach-aspeed-ast2600 to index.rst - Fix the multi-line alignment problem - Remove the tach enable/disable when read the rpm - Fix some coding format issue Changes since v1: - tach: - Add the document tach-aspeed-ast2600.rst - Use devm_* api to simplify the error cleanup. - Change hwmon register api to devm_hwmon_device_register_with_info Billy Tsai (4): dt-bindings: pwm: Add ASPEED PWM Control documentation dt-bindings: hwmon: Add ASPEED TACH Control documentation pwm: Add Aspeed ast2600 PWM support hwmon: Add Aspeed ast2600 TACH support .../bindings/hwmon/aspeed,ast2600-tach.yaml | 32 ++ .../bindings/pwm/aspeed,ast2600-pwm.yaml | 38 +++ Documentation/hwmon/index.rst | 1 + Documentation/hwmon/tach-aspeed-ast2600.rst | 25 ++ drivers/hwmon/Kconfig | 10 + drivers/hwmon/Makefile | 1 + drivers/hwmon/tach-aspeed-ast2600.c | 305 +++++++++++++++++ drivers/pwm/Kconfig | 10 + drivers/pwm/Makefile | 1 + drivers/pwm/pwm-aspeed-ast2600.c | 309 ++++++++++++++++++ 10 files changed, 732 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/aspeed,ast2600-tach.yaml create mode 100644 Documentation/devicetree/bindings/pwm/aspeed,ast2600-pwm.yaml create mode 100644 Documentation/hwmon/tach-aspeed-ast2600.rst create mode 100644 drivers/hwmon/tach-aspeed-ast2600.c create mode 100644 drivers/pwm/pwm-aspeed-ast2600.c