From nobody Sat Apr 11 03:54:36 2026 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 09425C25B0E for ; Tue, 16 Aug 2022 21:15:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237623AbiHPVPm (ORCPT ); Tue, 16 Aug 2022 17:15:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54684 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237552AbiHPVPV (ORCPT ); Tue, 16 Aug 2022 17:15:21 -0400 Received: from mail-wr1-x42e.google.com (mail-wr1-x42e.google.com [IPv6:2a00:1450:4864:20::42e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C723D83BFA for ; Tue, 16 Aug 2022 14:15:04 -0700 (PDT) Received: by mail-wr1-x42e.google.com with SMTP id n4so14017315wrp.10 for ; Tue, 16 Aug 2022 14:15:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc; bh=HJHRtwvM9XKFKJZyiCAat71LR5qh4WybnuX4htGG8co=; b=aONfSRH9mk7Lcf234Z34egz6022TWDk9fVq7vrFyoi9eN4tr2FZ7mTW0QiG2NhLaMc m3hYVtWdO2IqkmBUMXZe2F2Z09yD8jpjqPIKGeJxfArjXPr9XzU0keCJBWAAhw0bypey H2xFZ3Rk58fJMfd0TrQGZmDUC+TALbkTe8YBNno6IC08sNX+WdDbNysmzFwDKN7c1M5H e0zZ2i41dyeGBkuZXeD1qsZtGRCn2E292hPiZ4UwfCSC8UBcC5EKYhathtpS0JOgiCNa qGTSF5tFcr+3XT1wW4DCSH3USPDSIyZb89tBjYHfvkagXpX0V5a5lRS69ArWyv4b6XfJ K4/w== 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; bh=HJHRtwvM9XKFKJZyiCAat71LR5qh4WybnuX4htGG8co=; b=WUsxPEEZrCpInf4HBNh4QCyYY1enoJ8oC4S9PwRRVfdi03r0RGY1rfF2L2/+nQ3kZW m7Kq8WWEE69YVzR5EmfodypHDXj7/Y0blO1mAAD5lHIdLFpbeKetX+S7xZL5ZnEscxO+ o/Fw/5kr7BtxXEvowRkkC6AAM4C3zliuxbPsYOxqZI/yrD9QY9mb5KmApwKm/IcHBjvE Se1avzX9TlML3RSOsjYsiG9y+VQHdJKEEiYAavCUj1lhU+9T7OIlUU2MpXcKvTRK7O8M rDEg1CphFE74sBm55VfitxyvJPizWwlrKJwxFZGnRNIdrjML0kIeE48fihCq68m4Kr82 eFzQ== X-Gm-Message-State: ACgBeo1I8j6a6oEovVDt9jFlNl1SLlv/pin/+FBKuPN/ADoI0WEothvJ CJtzfyOkNtphuksd6+dQZCyzfw== X-Google-Smtp-Source: AA6agR4PSu/FeqggYgzon5wVbBrXNRT04fTg3xrVMWNipvz5DeMvZ0VtVmr7OOfx6ZSUExxyviDsBA== X-Received: by 2002:a05:6000:10d1:b0:220:5c89:50e5 with SMTP id b17-20020a05600010d100b002205c8950e5mr12981023wrx.335.1660684502898; Tue, 16 Aug 2022 14:15:02 -0700 (PDT) Received: from rainbowdash.office.codethink.co.uk ([167.98.27.226]) by smtp.gmail.com with ESMTPSA id r4-20020a1c4404000000b003a3170a7af9sm23913wma.4.2022.08.16.14.15.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Aug 2022 14:15:02 -0700 (PDT) From: Ben Dooks To: linux-pwm@vger.kernel.org Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Lee Jones , u.kleine-koenig@pengutronix.de, Thierry Reding , Krzysztof Kozlowski , Greentime Hu , jarkko.nikula@linux.intel.com, William Salmon , Jude Onyenegecha , Ben Dooks Subject: [RFC v4 08/10] pwm: dwc: add of/platform support Date: Tue, 16 Aug 2022 22:14:52 +0100 Message-Id: <20220816211454.237751-9-ben.dooks@sifive.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220816211454.237751-1-ben.dooks@sifive.com> References: <20220816211454.237751-1-ben.dooks@sifive.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The dwc pwm controller can be used in non-PCI systems, so allow either platform or OF based probing. Signed-off-by: Ben Dooks --- v4: - split the of code out of the core - moved the compile test code earlier - fixed review comments - used NS_PER_SEC - use devm_clk_get_enabled v3: - changed compatible name --- drivers/pwm/Kconfig | 9 +++++ drivers/pwm/Makefile | 1 + drivers/pwm/pwm-dwc-of.c | 78 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 88 insertions(+) create mode 100644 drivers/pwm/pwm-dwc-of.c diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig index a9f1c554db2b..f1735653365f 100644 --- a/drivers/pwm/Kconfig +++ b/drivers/pwm/Kconfig @@ -192,6 +192,15 @@ config PWM_DWC_PCI To compile this driver as a module, choose M here: the module will be called pwm-dwc-pci. =20 +config PWM_DWC_OF + tristate "DesignWare PWM Controller (OF bus) + depends on PWM_DWC && OF + help + PWM driver for Synopsys DWC PWM Controller on an OF bus. + + To compile this driver as a module, choose M here: the module + will be called pwm-dwc-of. + config PWM_EP93XX tristate "Cirrus Logic EP93xx PWM support" depends on ARCH_EP93XX || COMPILE_TEST diff --git a/drivers/pwm/Makefile b/drivers/pwm/Makefile index a70d36623129..d1fd1641f077 100644 --- a/drivers/pwm/Makefile +++ b/drivers/pwm/Makefile @@ -15,6 +15,7 @@ obj-$(CONFIG_PWM_CLPS711X) +=3D pwm-clps711x.o obj-$(CONFIG_PWM_CRC) +=3D pwm-crc.o obj-$(CONFIG_PWM_CROS_EC) +=3D pwm-cros-ec.o obj-$(CONFIG_PWM_DWC) +=3D pwm-dwc.o +obj-$(CONFIG_PWM_DWC_OF) +=3D pwm-dwc-of.o obj-$(CONFIG_PWM_DWC_PCI) +=3D pwm-dwc-pci.o obj-$(CONFIG_PWM_EP93XX) +=3D pwm-ep93xx.o obj-$(CONFIG_PWM_FSL_FTM) +=3D pwm-fsl-ftm.o diff --git a/drivers/pwm/pwm-dwc-of.c b/drivers/pwm/pwm-dwc-of.c new file mode 100644 index 000000000000..d18fac287325 --- /dev/null +++ b/drivers/pwm/pwm-dwc-of.c @@ -0,0 +1,78 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * DesignWare PWM Controller driver OF + * + * Copyright (C) 2022 SiFive, Inc. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "pwm-dwc.h" + +static int dwc_pwm_plat_probe(struct platform_device *pdev) +{ + struct device *dev =3D &pdev->dev; + struct dwc_pwm *dwc; + int ret; + + dwc =3D dwc_pwm_alloc(dev); + if (!dwc) + return -ENOMEM; + + dwc->base =3D devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(dwc->base)) + return dev_err_probe(dev, PTR_ERR(dwc->base), + "failed to map IO\n"); + + dwc->clk =3D devm_clk_get_enabled(dev, "timer"); + if (IS_ERR(dwc->clk)) + return dev_err_probe(dev, PTR_ERR(dwc->clk), + "failed to get timer clock\n"); + + clk_prepare_enable(dwc->clk); + dwc->clk_ns =3D NSEC_PER_SEC / clk_get_rate(dwc->clk); + + ret =3D devm_pwmchip_add(dev, &dwc->chip); + if (ret) + return ret; + + return 0; +} + +static int dwc_pwm_plat_remove(struct platform_device *pdev) +{ + struct dwc_pwm *dwc =3D platform_get_drvdata(pdev); + + clk_disable_unprepare(dwc->clk); + return 0; +} + +static const struct of_device_id dwc_pwm_dt_ids[] =3D { + { .compatible =3D "snps,dw-apb-timers-pwm2" }, + { }, +}; +MODULE_DEVICE_TABLE(of, dwc_pwm_dt_ids); + +static struct platform_driver dwc_pwm_plat_driver =3D { + .driver =3D { + .name =3D "dwc-pwm", + .of_match_table =3D dwc_pwm_dt_ids, + }, + .probe =3D dwc_pwm_plat_probe, + .remove =3D dwc_pwm_plat_remove, +}; + +module_platform_driver(dwc_pwm_plat_driver); + +MODULE_ALIAS("platform:dwc-pwm-of"); +MODULE_AUTHOR("Ben Dooks "); +MODULE_DESCRIPTION("DesignWare PWM Controller"); +MODULE_LICENSE("GPL"); --=20 2.35.1