From patchwork Wed Apr 25 15:08:40 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sibi Sankar X-Patchwork-Id: 10363459 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 23652601D3 for ; Wed, 25 Apr 2018 15:09:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0FBDC26E46 for ; Wed, 25 Apr 2018 15:09:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0427F28236; Wed, 25 Apr 2018 15:09:38 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7B49428173 for ; Wed, 25 Apr 2018 15:09:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755015AbeDYPJg (ORCPT ); Wed, 25 Apr 2018 11:09:36 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:40162 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754862AbeDYPJ2 (ORCPT ); Wed, 25 Apr 2018 11:09:28 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 3A3B760227; Wed, 25 Apr 2018 15:09:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1524668968; bh=CJneCSM+Czue47q2eNR6/rGh9aO9g/0jrl5Se0dkhJA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mcmWMk57Ve9pFNLAFiB71hP7xcy9UTgujMOrIEf6iPNrfuQmkkFyNtB64n1LpmTR9 4TnmcOi4tpI/JXW2C6thECFPtu+nN1uhMtnG5rJFXC5JNnGZvIqWasmvfF2x3DAGez FccBLDAJ6HjQnLSplzAa04ABkAhUUOky/FFXjjrY= Received: from blr-ubuntu-87.qualcomm.com (blr-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.18.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: sibis@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id E29EF60F5F; Wed, 25 Apr 2018 15:09:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1524668967; bh=CJneCSM+Czue47q2eNR6/rGh9aO9g/0jrl5Se0dkhJA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VdP9w9+HkO/ZmXh4nsmkRISy4t9z+MSjQLEbzd1svWv4e8zzJvlL7NDiAsAl65cxw Zjgtal2B0bwp+jG+2PEf4oE7jzJBTpCE9PoA6dlzEJcRuWOglF1OQQxCsb8vHyoPAt hDxW/eZhdBoGygE5+OJV/DV3H+Q+MnN4rERQPN6s= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org E29EF60F5F Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=sibis@codeaurora.org From: Sibi Sankar To: bjorn.andersson@linaro.org, p.zabel@pengutronix.de, robh+dt@kernel.org Cc: linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, sibis@codeaurora.org, georgi.djakov@linaro.org, jassisinghbrar@gmail.com, ohad@wizery.com, mark.rutland@arm.com, kyan@codeaurora.org, sricharan@codeaurora.org, akdwived@codeaurora.org, linux-arm-msm@vger.kernel.org, tsoni@codeaurora.org Subject: [PATCH v4 2/5] reset: qcom: AOSS (always on subsystem) reset controller Date: Wed, 25 Apr 2018 20:38:40 +0530 Message-Id: <20180425150843.26657-3-sibis@codeaurora.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180425150843.26657-1-sibis@codeaurora.org> References: <20180425150843.26657-1-sibis@codeaurora.org> Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add reset controller driver for Qualcomm SDM845 SoC to control reset signals provided by AOSS for Modem, Venus ADSP, GPU, Camera, Wireless, Display subsystem Signed-off-by: Sibi Sankar --- drivers/reset/Kconfig | 9 +++ drivers/reset/Makefile | 1 + drivers/reset/reset-qcom-aoss.c | 133 ++++++++++++++++++++++++++++++++ 3 files changed, 143 insertions(+) create mode 100644 drivers/reset/reset-qcom-aoss.c diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig index c0b292be1b72..756ad2b27d0f 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -82,6 +82,15 @@ config RESET_PISTACHIO help This enables the reset driver for ImgTec Pistachio SoCs. +config RESET_QCOM_AOSS + bool "Qcom AOSS Reset Driver" + depends on ARCH_QCOM || COMPILE_TEST + help + This enables the AOSS (always on subsystem) reset driver + for Qualcomm SDM845 SoCs. Say Y if you want to control + reset signals provided by AOSS for Modem, Venus, ADSP, + GPU, Camera, Wireless, Display subsystem. Otherwise, say N. + config RESET_SIMPLE bool "Simple Reset Controller Driver" if COMPILE_TEST default ARCH_SOCFPGA || ARCH_STM32 || ARCH_STRATIX10 || ARCH_SUNXI || ARCH_ZX || ARCH_ASPEED diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile index c1261dcfe9ad..6881e4d287f0 100644 --- a/drivers/reset/Makefile +++ b/drivers/reset/Makefile @@ -14,6 +14,7 @@ obj-$(CONFIG_RESET_LPC18XX) += reset-lpc18xx.o obj-$(CONFIG_RESET_MESON) += reset-meson.o obj-$(CONFIG_RESET_OXNAS) += reset-oxnas.o obj-$(CONFIG_RESET_PISTACHIO) += reset-pistachio.o +obj-$(CONFIG_RESET_QCOM_AOSS) += reset-qcom-aoss.o obj-$(CONFIG_RESET_SIMPLE) += reset-simple.o obj-$(CONFIG_RESET_STM32MP157) += reset-stm32mp1.o obj-$(CONFIG_RESET_SUNXI) += reset-sunxi.o diff --git a/drivers/reset/reset-qcom-aoss.c b/drivers/reset/reset-qcom-aoss.c new file mode 100644 index 000000000000..3b0bbb387f7b --- /dev/null +++ b/drivers/reset/reset-qcom-aoss.c @@ -0,0 +1,133 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 The Linux Foundation. All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include + +struct qcom_aoss_reset_map { + unsigned int reg; +}; + +struct qcom_aoss_desc { + const struct qcom_aoss_reset_map *resets; + size_t num_resets; +}; + +struct qcom_aoss_reset_data { + struct reset_controller_dev rcdev; + void __iomem *base; + const struct qcom_aoss_desc *desc; +}; + +static const struct qcom_aoss_reset_map sdm845_aoss_resets[] = { + [AOSS_CC_MSS_RESTART] = {0x0}, + [AOSS_CC_CAMSS_RESTART] = {0x1000}, + [AOSS_CC_VENUS_RESTART] = {0x2000}, + [AOSS_CC_GPU_RESTART] = {0x3000}, + [AOSS_CC_DISPSS_RESTART] = {0x4000}, + [AOSS_CC_WCSS_RESTART] = {0x10000}, + [AOSS_CC_LPASS_RESTART] = {0x20000}, +}; + +static const struct qcom_aoss_desc sdm845_aoss_desc = { + .resets = sdm845_aoss_resets, + .num_resets = ARRAY_SIZE(sdm845_aoss_resets), +}; + +static inline struct qcom_aoss_reset_data *to_qcom_aoss_reset_data( + struct reset_controller_dev *rcdev) +{ + return container_of(rcdev, struct qcom_aoss_reset_data, rcdev); +} + +static int qcom_aoss_control_assert(struct reset_controller_dev *rcdev, + unsigned long idx) +{ + struct qcom_aoss_reset_data *data = to_qcom_aoss_reset_data(rcdev); + const struct qcom_aoss_reset_map *map = &data->desc->resets[idx]; + + writel(1, data->base + map->reg); + /* Wait 6 32kHz sleep cycles for reset */ + usleep_range(200, 210); + return 0; +} + +static int qcom_aoss_control_deassert(struct reset_controller_dev *rcdev, + unsigned long idx) +{ + struct qcom_aoss_reset_data *data = to_qcom_aoss_reset_data(rcdev); + const struct qcom_aoss_reset_map *map = &data->desc->resets[idx]; + + writel(0, data->base + map->reg); + /* Wait 6 32kHz sleep cycles for reset */ + usleep_range(200, 210); + return 0; +} + +static int qcom_aoss_control_reset(struct reset_controller_dev *rcdev, + unsigned long idx) +{ + qcom_aoss_control_assert(rcdev, idx); + + return qcom_aoss_control_deassert(rcdev, idx); +} + +static const struct reset_control_ops qcom_aoss_reset_ops = { + .reset = qcom_aoss_control_reset, + .assert = qcom_aoss_control_assert, + .deassert = qcom_aoss_control_deassert, +}; + +static int qcom_aoss_reset_probe(struct platform_device *pdev) +{ + struct qcom_aoss_reset_data *data; + struct device *dev = &pdev->dev; + const struct qcom_aoss_desc *desc; + struct resource *res; + + desc = of_device_get_match_data(dev); + if (!desc) + return -EINVAL; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->desc = desc; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + data->base = devm_ioremap_resource(dev, res); + if (IS_ERR(data->base)) + return PTR_ERR(data->base); + + data->rcdev.owner = THIS_MODULE; + data->rcdev.ops = &qcom_aoss_reset_ops; + data->rcdev.nr_resets = desc->num_resets; + data->rcdev.of_node = dev->of_node; + + return devm_reset_controller_register(dev, &data->rcdev); +} + +static const struct of_device_id qcom_aoss_reset_of_match[] = { + { .compatible = "qcom,sdm845-aoss-reset", .data = &sdm845_aoss_desc }, + {} +}; + +static struct platform_driver qcom_aoss_reset_driver = { + .probe = qcom_aoss_reset_probe, + .driver = { + .name = "qcom_aoss_reset", + .of_match_table = qcom_aoss_reset_of_match, + }, +}; + +builtin_platform_driver(qcom_aoss_reset_driver); + +MODULE_DESCRIPTION("Qualcomm AOSS Reset Driver"); +MODULE_LICENSE("GPL v2");