From patchwork Mon Nov 29 06:43:27 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Billy Tsai X-Patchwork-Id: 12693896 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 AC179C433F5 for ; Mon, 29 Nov 2021 07:07:57 +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:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=pAL3JoPjZfOoU4ucQGdXpSzin90aMeCaY9P82LQKX1k=; b=t3bXvLShqkXLjn +0sfrDUnZRkzJNKqeI5Ww8v3ALxRMEKmt1AgpsJuNj3wt49T7BR0lviUc+joobL0w75nCP+PG34V/ PCMPqztDhlkUeJgb3COHNNqUpMzn1LvvEtdbepGs2TB1PEOidSTcc6zZMhn+ikyoKUb5Mxn+IB7qZ buVw4mETO/1qN0uhdZ1NqyMOteOsxGZK0XtrwQfPP0+7aGQdpflXVJ49tJNvOreZ/FIQjT3JKlnRO IBTs72gFd0jaT1TtjjcoCGjAvqH9PbgZfMgr6W+9mx58JgdqxYZmmgVkj94suLEMknts7pty66zbU C5EaX3uT6KpFi7TJ54jg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mrakD-00HY40-2J; Mon, 29 Nov 2021 07:06:33 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mrajs-00HY03-An for linux-arm-kernel@bombadil.infradead.org; Mon, 29 Nov 2021 07:06:12 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:Content-Type :MIME-Version:Message-ID:Date:Subject:CC:To:From:Sender:Reply-To:Content-ID: Content-Description:In-Reply-To:References; bh=beaQbOi7rhRxi8LmNP1qV2NoKrBpOjtDZ0CwUJ7fUQU=; b=Kc5XWhrru4uVaN7WlG9sNfZdUX JWQDMj16nNuS1j0/Ya2yMW4nl6iS6g6j223fPEQ1Pg1b50yxE5vPqSpjpe6FVk8TCCFrt8irCyVcU JsYkhCsB5vcxcRoC1RC88tFZ3baot69Rtvxs2DNhp1+xtZX93msnYFLRHkY74Ez3fkuLJ3O7u7y7X V6RcCzdW+hsFo1tZ29QyXgiPKe4htqDyYWr0xTwqHcTgxvZJOHpzyvRwwKH4hXL97DDqEDAt+dvsC aBViUSoivbEB7+XCqihDSgDRHg8ZCh43VaxgUzF2DWxK9IoXTcgyEuLGKRr/4H35uaVPbqAAhHylV Cr9rdLAA==; Received: from twspam01.aspeedtech.com ([211.20.114.71]) by desiato.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mraP8-001CxU-5U for linux-arm-kernel@lists.infradead.org; Mon, 29 Nov 2021 06:44:50 +0000 Received: from mail.aspeedtech.com ([192.168.0.24]) by twspam01.aspeedtech.com with ESMTP id 1AT6HcpA024517; Mon, 29 Nov 2021 14:17:38 +0800 (GMT-8) (envelope-from billy_tsai@aspeedtech.com) Received: from BillyTsai-pc.aspeed.com (192.168.2.149) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 29 Nov 2021 14:42:05 +0800 From: Billy Tsai To: , , , , , , , , , , , , , , , CC: Subject: [v13 0/2] Support pwm driver for aspeed ast26xx Date: Mon, 29 Nov 2021 14:43:27 +0800 Message-ID: <20211129064329.27006-1-billy_tsai@aspeedtech.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [192.168.2.149] X-ClientProxiedBy: TWMBX02.aspeed.com (192.168.0.24) To TWMBX02.aspeed.com (192.168.0.24) X-DNSRBL: X-MAIL: twspam01.aspeedtech.com 1AT6HcpA024517 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211129_064446_950857_12B880D0 X-CRM114-Status: GOOD ( 18.64 ) 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 The legacy driver of aspeed pwm is binding with tach controller and it doesn't follow the pwm framworks usage. In addition, the pwm register usage of the 6th generation of ast26xx has drastic change. So these patch serials add the new aspeed pwm driver to fix up the problem above. Change since v12: - pwm-aspeed-ast2600.c - Fix the comment about the duty cycle and period of the PWM. - Configured to max period when request period > max period. - Remove unnecessary curly braces. Change since v11: - pwm-aspeed-ast2600.c - Request reset controller before clock enable. Change since v10: - pwm-aspeed-ast2600.c - Add more comment to explain the feature of PWM - Fix the naming of some parameters. - Set pin_enable and clk_enable at the same time. - Always set fixed divisor to hw register when apply. Change since v9: - dt-bindings: - Change the naming of tach subnode channel setting property to aspeed,tach-ch. - pwm-aspeed-ast2600.c - Fix the naming of some parameters. - Capitalise error messages. - Handling potentially mult overflow when .apply Change since v8: - pwm-aspeed-ast2600.c - Replace "* _BITULL(div_h)" to "<< div_h" - Fix duty_cycle precision problem. - Add the comment about the formula of duty_cycle. Change since v7: - pwm-aspeed-g6.c - Rename the driver: pwm-aspeed-g6.c -> pwm-aspeed-ast2600.c. - Macro remove "_CH" part of the register name. - Unroll the aspeed_pwm_get_period and remove it. - Simplify the formula to get duty_pt - Reduce the number of writing register. Organize all the fields and write them at once. Change since v6: - dt-bindings: - Add blank line between each DT property. - Change the sub-node name from fan to tach-ch. - pwm-aspeed-g6.c - Merge aspeed_pwm_set_period and aspeed_pwm_set_duty into .apply. - Convert the factor type to u64 when calculating the period value. - Using ROUND_UP strategy to calculate div_h for finer resolution. Change since v5: - pwm-aspeed-g6.c suggested by Uwe Kleine-König - Move the divide at the end of the calculation. - Unified the prefix of the function name. - Use div64_u64 to calculate the divider of frequency. Change since v4: - dt_binding: - pwm/tach yaml: Replace child-node with additionalProperties - pwm-tach yaml: Replace child-node with patternProperties - pwm-aspeed-g6.c suggested by Uwe Kleine-König - The bit definitions contained the name of the register. - Remove single caller function and fold it to the caller. - Avoid to divide by the result of a division. - Remove unnecessary condition in .apply(). - Use goto for error handling Changes since v3: - Add the dt_binding for aspeed,ast2600-tach. - Describe the pwm/tach as child-node of pwm-tach mfd. - Complete the properties of pwm node. Changes since v2: - Remove the tach node, #address-cells and #size-cells from pwm-tach.yaml - Add clocks and reset properties to pwm-tach.yaml - Kconfig/Makfile sorted alphabetically - pwm-aspeed-g6.c suggested by Uwe Kleine-König - Add more hardware descriptions at top of the driver. - Remove unused api request and free - Move the initialize settings of all pwm channel to probe. - Change the method of getting the approximate period. - Read the hardware register values to fill the state for .get_state() Changes since v1: - Fix the dt_binding_check fail suggested by Rob Herring - Add depends to PWM_ASPEED_G6 configure suggested by Uwe Kleine-Konig - pwm-aspeed-g6.c suggested by Uwe Kleine-König - Fix license header - Use bitfiled.h macro to define register fields - Implement .remove device function - Implement .get_state pwm api Billy Tsai (2): dt-bindings: Add bindings for aspeed pwm-tach. pwm: Add Aspeed ast2600 PWM support .../bindings/hwmon/aspeed,ast2600-tach.yaml | 68 ++++ .../bindings/mfd/aspeed,ast2600-pwm-tach.yaml | 76 ++++ .../bindings/pwm/aspeed,ast2600-pwm.yaml | 64 ++++ drivers/pwm/Kconfig | 10 + drivers/pwm/Makefile | 1 + drivers/pwm/pwm-aspeed-ast2600.c | 327 ++++++++++++++++++ 6 files changed, 546 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/aspeed,ast2600-tach.yaml create mode 100644 Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml create mode 100644 Documentation/devicetree/bindings/pwm/aspeed,ast2600-pwm.yaml create mode 100644 drivers/pwm/pwm-aspeed-ast2600.c