From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BE8CCC433FE for ; Sat, 12 Feb 2022 16:30:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237307AbiBLQaZ (ORCPT ); Sat, 12 Feb 2022 11:30:25 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:43288 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229623AbiBLQaW (ORCPT ); Sat, 12 Feb 2022 11:30:22 -0500 Received: from box.trvn.ru (box.trvn.ru [194.87.146.52]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5C5B120E; Sat, 12 Feb 2022 08:30:18 -0800 (PST) Received: from authenticated-user (box.trvn.ru [194.87.146.52]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by box.trvn.ru (Postfix) with ESMTPSA id 22B6741943; Sat, 12 Feb 2022 21:24:02 +0500 (+05) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=trvn.ru; s=mail; t=1644683044; bh=RYG3U4X1RX8dzJiS04Tlw7Pm9vtzFCEy33FGibNApDg=; h=From:To:Cc:Subject:Date:From; b=GSqSqWPsMWdBhbSKO9SE3O6xHw+WuWH/4iDolmnPLmI8Y0Y9FYGcZHI3A2bYEOBap q/BrvOs7mHANuppeZ01maSt1zk2rG+eTM7ufH593pmnyYfuHRhwKkOx/HTilZ/qIY3 y9SS2fMWUrAKBk1guVyNO+WlpHjHeJ1VMK6d1BV7btBdCnMPORrYaJDWx5hYoTZkMd j454DXb7jPJE6dPcl+0+3ItXfE2jYL4rExZcA3fGVDCH4N2Iax1MBZ38WMHNkshToC gl/hbot1NbqlzbqN2TECglK8WBPob8XiqZu5nLqVqfdHo4PmdLJsrht33CHO4Rt57f 6JsCSGUG2G9zg== From: Nikita Travkin To: thierry.reding@gmail.com, lee.jones@linaro.org Cc: u.kleine-koenig@pengutronix.de, robh+dt@kernel.org, sboyd@kernel.org, krzk@kernel.org, linus.walleij@linaro.org, masneyb@onstation.org, sean.anderson@seco.com, linux-pwm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht, Nikita Travkin Subject: [PATCH v5 0/2] Clock based PWM output driver Date: Sat, 12 Feb 2022 21:23:40 +0500 Message-Id: <20220212162342.72646-1-nikita@trvn.ru> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series introduces an "adapter" driver that allows PWM consumers to control clock outputs with duty-cycle control. Some platforms (e.g. some Qualcomm chipsets) have "General Purpose" clocks that can be muxed to GPIO outputs and used as PWM outputs. Those outputs may be connected to various peripherals such as leds in display backlight or haptic feedback motor driver. To avoid re-implementing every single PWM consumer driver with clk support (like in [1]) and don't put the burden of providing the PWM sources on the clock drivers (as was proposed in [2]), clk based pwm controller driver is introduced. There is an existing driver that provides the opposite function in drivers/clk/clk-pwm.c with a compatible "pwm-clock" so the new driver uses the opposite naming scheme: drivers/pwm/pwm-clk.c and compatible "clk-pwm". Changes in v2: - Fix filename in the DT schema. - Address Uwe's review comments. Changes in v3: - Fix node pattern in the core pwm schema. - Address Uwe's review comments. Changes in v4: - Drop the (incorrect) pwm schema change. - Use generic node name in the dt bindings example. Changes in v5: - Correct required properties. - add missed returns. Nikita Travkin (2): dt-bindings: pwm: Document clk based PWM controller pwm: Add clock based PWM output driver .../devicetree/bindings/pwm/clk-pwm.yaml | 46 ++++++ drivers/pwm/Kconfig | 10 ++ drivers/pwm/Makefile | 1 + drivers/pwm/pwm-clk.c | 139 ++++++++++++++++++ 4 files changed, 196 insertions(+) create mode 100644 Documentation/devicetree/bindings/pwm/clk-pwm.yaml create mode 100644 drivers/pwm/pwm-clk.c -- 2.34.1