From patchwork Tue Mar 3 09:03:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Abel Vesa X-Patchwork-Id: 11417469 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BCFD0174A for ; Tue, 3 Mar 2020 09:06:09 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 9B8B82146E for ; Tue, 3 Mar 2020 09:06:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="kc3iSKUc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9B8B82146E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nxp.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=qcbnUNQ/7PGMEZGRoBELxcNwZSMmyAko3ftmrs0LCWU=; b=kc3iSKUcl8i//EkWrg/NHWOcLR WW4NrRZwXMo5+1oEBPUg7q+DXpk/eWiDjfTYcio+g4DzJtm5kIMoiSpzkjio4+q5xVGJIEuQqhz3l psCDEDH7DRWmAcaNn9j9okzqawD9UHE1nqRucSdlDQsocn9PlkuYY5HzCoaU0JygvWm/cdLogYxRm b5G4Lxw+5KOzjV84qYrrftw0HnmlnlaS2mAJV7VGl9G5AzXImE37ovG0OwN5c/BK9D0TO5cnEF65c WdgWmGQduNrgW/HAiPzjrAEplK8B3YedfggpWO5AOdqPnqUGw4yRN9bZuTt0UaH4bTWI2jmtdV/Ai BVQy56Kg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j93VB-0000XL-5h; Tue, 03 Mar 2020 09:06:09 +0000 Received: from inva020.nxp.com ([92.121.34.13]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1j93Sv-0005ga-4L for linux-arm-kernel@lists.infradead.org; Tue, 03 Mar 2020 09:03:51 +0000 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 7AFDC1A144B; Tue, 3 Mar 2020 10:03:47 +0100 (CET) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 6DD631A1454; Tue, 3 Mar 2020 10:03:47 +0100 (CET) Received: from fsr-ub1664-175.ea.freescale.net (fsr-ub1664-175.ea.freescale.net [10.171.82.40]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id 7761320414; Tue, 3 Mar 2020 10:03:46 +0100 (CET) From: Abel Vesa To: Rob Herring , Shawn Guo , Sascha Hauer , Fabio Estevam , Mike Turquette , Stephen Boyd , Lee Jones , Anson Huang , Leonard Crestez , Peng Fan , Jacky Bai Subject: [RFC 10/11] reset: imx: Add audiomix reset controller support Date: Tue, 3 Mar 2020 11:03:25 +0200 Message-Id: <1583226206-19758-11-git-send-email-abel.vesa@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1583226206-19758-1-git-send-email-abel.vesa@nxp.com> References: <1583226206-19758-1-git-send-email-abel.vesa@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200303_010349_467020_6B7700E5 X-CRM114-Status: GOOD ( 15.07 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [92.121.34.13 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Abel Vesa , Linux Kernel Mailing List , NXP Linux Team , linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org The imx-mix MFD driver registers some devices, one of which, in case of audiomix, maps correctly to a reset controller type. This driver registers a reset controller for that. For now, only the EARC specific resets are added. Signed-off-by: Abel Vesa Reviewed-by: Leonard Crestez --- drivers/reset/Kconfig | 7 ++ drivers/reset/Makefile | 1 + drivers/reset/reset-imx-audiomix.c | 122 +++++++++++++++++++++++++ include/dt-bindings/reset/imx-audiomix-reset.h | 15 +++ 4 files changed, 145 insertions(+) create mode 100644 drivers/reset/reset-imx-audiomix.c create mode 100644 include/dt-bindings/reset/imx-audiomix-reset.h diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig index d9efbfd..2f8d9b3 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -81,6 +81,13 @@ config RESET_INTEL_GW Say Y to control the reset signals provided by reset controller. Otherwise, say N. +config RESET_IMX_AUDIOMIX + bool "i.MX Audiomix Reset Driver" if COMPILE_TEST + depends on HAS_IOMEM + default ARCH_MXC + help + This enables the audiomix reset controller driver for i.MX SoCs. + config RESET_LANTIQ bool "Lantiq XWAY Reset Driver" if COMPILE_TEST default SOC_TYPE_XWAY diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile index 249ed35..cf23d38 100644 --- a/drivers/reset/Makefile +++ b/drivers/reset/Makefile @@ -12,6 +12,7 @@ obj-$(CONFIG_RESET_BRCMSTB_RESCAL) += reset-brcmstb-rescal.o obj-$(CONFIG_RESET_HSDK) += reset-hsdk.o obj-$(CONFIG_RESET_IMX7) += reset-imx7.o obj-$(CONFIG_RESET_INTEL_GW) += reset-intel-gw.o +obj-$(CONFIG_RESET_IMX_AUDIOMIX) += reset-imx-audiomix.o obj-$(CONFIG_RESET_LANTIQ) += reset-lantiq.o obj-$(CONFIG_RESET_LPC18XX) += reset-lpc18xx.o obj-$(CONFIG_RESET_MESON) += reset-meson.o diff --git a/drivers/reset/reset-imx-audiomix.c b/drivers/reset/reset-imx-audiomix.c new file mode 100644 index 00000000..d1c62ef --- /dev/null +++ b/drivers/reset/reset-imx-audiomix.c @@ -0,0 +1,122 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 NXP. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define IMX_AUDIOMIX_EARC_CTRL_REG 0x200 + +#define IMX_AUDIOMIX_EARC_RESET_BIT 0x0 +#define IMX_AUDIOMIX_EARC_PHY_RESET_BIT 0x1 + +struct imx_audiomix_reset_data { + void __iomem *base; + struct reset_controller_dev rcdev; + spinlock_t lock; +}; + +static int imx_audiomix_reset_set(struct reset_controller_dev *rcdev, + unsigned long id, bool assert) +{ + struct imx_audiomix_reset_data *drvdata = container_of(rcdev, + struct imx_audiomix_reset_data, rcdev); + void __iomem *reg_addr = drvdata->base; + unsigned long flags; + unsigned int offset; + u32 reg; + + switch (id) { + case IMX_AUDIOMIX_EARC_PHY_RESET: + reg_addr += IMX_AUDIOMIX_EARC_CTRL_REG; + offset = IMX_AUDIOMIX_EARC_PHY_RESET_BIT; + break; + case IMX_AUDIOMIX_EARC_RESET: + reg_addr += IMX_AUDIOMIX_EARC_CTRL_REG; + offset = IMX_AUDIOMIX_EARC_RESET_BIT; + break; + default: + return -EINVAL; + } + + if (assert) { + pm_runtime_get_sync(rcdev->dev); + spin_lock_irqsave(&drvdata->lock, flags); + reg = readl(reg_addr); + writel(reg & ~BIT(offset), reg_addr); + spin_unlock_irqrestore(&drvdata->lock, flags); + } else { + spin_lock_irqsave(&drvdata->lock, flags); + reg = readl(reg_addr); + writel(reg | BIT(offset), reg_addr); + spin_unlock_irqrestore(&drvdata->lock, flags); + pm_runtime_put(rcdev->dev); + } + + return 0; +} + +static int imx_audiomix_reset_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return imx_audiomix_reset_set(rcdev, id, true); +} + +static int imx_audiomix_reset_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return imx_audiomix_reset_set(rcdev, id, false); +} + +static const struct reset_control_ops imx_audiomix_reset_ops = { + .assert = imx_audiomix_reset_assert, + .deassert = imx_audiomix_reset_deassert, +}; + +static int imx_audiomix_reset_probe(struct platform_device *pdev) +{ + struct imx_audiomix_reset_data *drvdata; + struct device *dev = &pdev->dev; + + drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL); + if (drvdata == NULL) + return -ENOMEM; + + drvdata->base = dev_get_drvdata(dev->parent); + + platform_set_drvdata(pdev, drvdata); + + pm_runtime_enable(dev); + + spin_lock_init(&drvdata->lock); + + drvdata->rcdev.owner = THIS_MODULE; + drvdata->rcdev.nr_resets = IMX_AUDIOMIX_RESET_NUM; + drvdata->rcdev.ops = &imx_audiomix_reset_ops; + drvdata->rcdev.of_node = dev->of_node; + drvdata->rcdev.dev = dev; + + return devm_reset_controller_register(dev, &drvdata->rcdev); +} + +static const struct of_device_id imx_audiomix_reset_dt_ids[] = { + { .compatible = "fsl,imx8mp-audiomix-reset", }, + { /* sentinel */ }, +}; + +static struct platform_driver imx_audiomix_reset_driver = { + .probe = imx_audiomix_reset_probe, + .driver = { + .name = KBUILD_MODNAME, + .of_match_table = imx_audiomix_reset_dt_ids, + }, +}; +module_platform_driver(imx_audiomix_reset_driver); diff --git a/include/dt-bindings/reset/imx-audiomix-reset.h b/include/dt-bindings/reset/imx-audiomix-reset.h new file mode 100644 index 00000000..2e26878 --- /dev/null +++ b/include/dt-bindings/reset/imx-audiomix-reset.h @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 NXP. + */ + +#ifndef DT_BINDING_RESET_IMX_AUDIOMIX_H +#define DT_BINDING_RESET_IMX_AUDIOMIX_H + +#define IMX_AUDIOMIX_EARC_RESET 0x0 +#define IMX_AUDIOMIX_EARC_PHY_RESET 0x1 + +#define IMX_AUDIOMIX_RESET_NUM 2 + +#endif +