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 X-Spam-Level: X-Spam-Status: No, score=-0.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7F4BEC1B0F2 for ; Wed, 20 Jun 2018 12:13:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2B7B120872 for ; Wed, 20 Jun 2018 12:13:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linaro.org header.i=@linaro.org header.b="SXSahKX8" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2B7B120872 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932224AbeFTMNI (ORCPT ); Wed, 20 Jun 2018 08:13:08 -0400 Received: from mail-wm0-f67.google.com ([74.125.82.67]:52452 "EHLO mail-wm0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753760AbeFTMLw (ORCPT ); Wed, 20 Jun 2018 08:11:52 -0400 Received: by mail-wm0-f67.google.com with SMTP id p126-v6so5641700wmb.2 for ; Wed, 20 Jun 2018 05:11:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=YQedRsQJNuAfIwCAUJuQkZ5zDukYeoDlE3WusBgILBs=; b=SXSahKX8uWMyt1WblmdQznBnUg+i40t+18Ryu5eMBARRnuV+m2LufALCVc1UMvScsE BC9LdUuvTv9Y22jCdpdUrsZoKUNICANCohGWsokaYI108xs/nBux8CQvKQScpolCbOCa 0MXDjn8CPatrrqFDyjpwcVpZcnPxA+RJikokg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=YQedRsQJNuAfIwCAUJuQkZ5zDukYeoDlE3WusBgILBs=; b=CyTnS84Tk46a2aJ/AoplqAzfsgTusw0vxGEO0CfnyF9YT/o9YrPWn4tJotWvfyS8Cn 9JVkQcbapZE4XFPxJvrKuHdU8kRMmb6+g5graXxldHu2aeyiTPQHS9tjQhVwAoGIkD4S zdw55Rd1+yABjKAx6yoK9lBvcSdXb7r11+oQkGim9ubXW/M1fNXXqP2ITht1R1LhmOS3 IJ6P/vDx0iBN9K5uvR+DOcUgYuFEp1FaRyyDRVjVSdM29lttLto1dyT0fEH0/M9qVFqu 1EELSc9PGaeQHmX+TiVTjXmo+xdqAkSePOJBq03XT6PaIoSjBekegfgRBoz2naXGAbtn n13Q== X-Gm-Message-State: APt69E3w08hEO1vRVmguqdQJcL/fU4w+NEnwCAX+ys1kmZONUhJ8+40K zQ3e2tlz3cht2s2a1YAXkj9oSw== X-Google-Smtp-Source: ADUXVKLfkw8eCvTvYdHMuAJvc1m4rENgHURQBD0690gaFgMyV1Re4u1eVFxS4QS7D9EGsCJg7DEnbQ== X-Received: by 2002:a1c:c90:: with SMTP id 138-v6mr1463663wmm.110.1529496711240; Wed, 20 Jun 2018 05:11:51 -0700 (PDT) Received: from localhost.localdomain ([212.45.67.2]) by smtp.googlemail.com with ESMTPSA id e14-v6sm1656483wmh.17.2018.06.20.05.11.49 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 20 Jun 2018 05:11:50 -0700 (PDT) From: Georgi Djakov To: linux-pm@vger.kernel.org, gregkh@linuxfoundation.org Cc: rjw@rjwysocki.net, robh+dt@kernel.org, mturquette@baylibre.com, khilman@baylibre.com, vincent.guittot@linaro.org, skannan@codeaurora.org, bjorn.andersson@linaro.org, amit.kucheria@linaro.org, seansw@qti.qualcomm.com, daidavid1@codeaurora.org, evgreen@chromium.org, mark.rutland@arm.com, lorenzo.pieralisi@arm.com, abailon@baylibre.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, georgi.djakov@linaro.org Subject: [PATCH v5 4/8] interconnect: qcom: Add RPM communication Date: Wed, 20 Jun 2018 15:11:37 +0300 Message-Id: <20180620121141.15403-5-georgi.djakov@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180620121141.15403-1-georgi.djakov@linaro.org> References: <20180620121141.15403-1-georgi.djakov@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On some Qualcomm SoCs, there is a remote processor, which controls some of the Network-On-Chip interconnect resources. Other CPUs express their needs by communicating with this processor. Add a driver to handle comminication with this remote processor. Signed-off-by: Georgi Djakov --- .../bindings/interconnect/qcom-smd.txt | 32 +++++++ drivers/interconnect/qcom/Makefile | 2 + drivers/interconnect/qcom/smd-rpm.c | 90 +++++++++++++++++++ drivers/interconnect/qcom/smd-rpm.h | 15 ++++ 4 files changed, 139 insertions(+) create mode 100644 Documentation/devicetree/bindings/interconnect/qcom-smd.txt create mode 100644 drivers/interconnect/qcom/Makefile create mode 100644 drivers/interconnect/qcom/smd-rpm.c create mode 100644 drivers/interconnect/qcom/smd-rpm.h diff --git a/Documentation/devicetree/bindings/interconnect/qcom-smd.txt b/Documentation/devicetree/bindings/interconnect/qcom-smd.txt new file mode 100644 index 000000000000..88a5aeb50935 --- /dev/null +++ b/Documentation/devicetree/bindings/interconnect/qcom-smd.txt @@ -0,0 +1,32 @@ +Qualcomm SMD-RPM interconnect driver binding +------------------------------------------------ +The RPM (Resource Power Manager) is a dedicated hardware engine +for managing the shared SoC resources in order to keep the lowest +power profile. It communicates with other hardware subsystems via +the shared memory driver (SMD) back-end and accepts requests for +various resources. + +Required properties : +- compatible : shall contain only one of the following: + "qcom,interconnect-smd-rpm" + +Example: + smd { + compatible = "qcom,smd"; + + rpm { + interrupts = <0 168 1>; + qcom,ipc = <&apcs 8 0>; + qcom,smd-edge = <15>; + + rpm_requests { + compatible = "qcom,rpm-msm8916"; + qcom,smd-channels = "rpm_requests"; + + interconnect-smd-rpm { + compatible = "qcom,interconnect-smd-rpm"; + }; + + }; + }; + }; diff --git a/drivers/interconnect/qcom/Makefile b/drivers/interconnect/qcom/Makefile new file mode 100644 index 000000000000..2a0c41db91c4 --- /dev/null +++ b/drivers/interconnect/qcom/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-y += smd-rpm.o diff --git a/drivers/interconnect/qcom/smd-rpm.c b/drivers/interconnect/qcom/smd-rpm.c new file mode 100644 index 000000000000..0cf772f51642 --- /dev/null +++ b/drivers/interconnect/qcom/smd-rpm.c @@ -0,0 +1,90 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * RPM over SMD communication wrapper for interconects + * + * Copyright (C) 2018 Linaro Ltd + * Author: Georgi Djakov + */ + +#include +#include +#include +#include +#include +#include +#include "smd-rpm.h" + +#define RPM_KEY_BW 0x00007762 + +static struct qcom_icc_rpm { + struct qcom_smd_rpm *rpm; +} icc_rpm_smd; + +struct icc_rpm_smd_req { + __le32 key; + __le32 nbytes; + __le32 value; +}; + +bool qcom_icc_rpm_smd_available(void) +{ + if (!icc_rpm_smd.rpm) + return false; + + return true; +} + +int qcom_icc_rpm_smd_send(int ctx, int rsc_type, int id, u32 val) +{ + struct icc_rpm_smd_req req = { + .key = cpu_to_le32(RPM_KEY_BW), + .nbytes = cpu_to_le32(sizeof(u32)), + .value = cpu_to_le32(val), + }; + + return qcom_rpm_smd_write(icc_rpm_smd.rpm, ctx, rsc_type, id, &req, + sizeof(req)); +} +EXPORT_SYMBOL(qcom_icc_rpm_smd_send); + +static int qcom_icc_rpm_smd_probe(struct platform_device *pdev) +{ + icc_rpm_smd.rpm = dev_get_drvdata(pdev->dev.parent); + if (!icc_rpm_smd.rpm) { + dev_err(&pdev->dev, "unable to retrieve handle to RPM\n"); + return -ENODEV; + } + + return 0; +} + +static const struct of_device_id qcom_icc_rpm_smd_dt_match[] = { + { .compatible = "qcom,interconnect-smd-rpm", }, + { }, +}; + +MODULE_DEVICE_TABLE(of, qcom_interconnect_rpm_smd_dt_match); + +static struct platform_driver qcom_interconnect_rpm_smd_driver = { + .driver = { + .name = "qcom-interconnect-smd-rpm", + .of_match_table = qcom_icc_rpm_smd_dt_match, + }, + .probe = qcom_icc_rpm_smd_probe, +}; + +static int __init rpm_smd_interconnect_init(void) +{ + return platform_driver_register(&qcom_interconnect_rpm_smd_driver); +} +subsys_initcall(rpm_smd_interconnect_init); + +static void __exit rpm_smd_interconnect_exit(void) +{ + platform_driver_unregister(&qcom_interconnect_rpm_smd_driver); +} +module_exit(rpm_smd_interconnect_exit) + +MODULE_AUTHOR("Georgi Djakov "); +MODULE_DESCRIPTION("Qualcomm SMD RPM interconnect driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/interconnect/qcom/smd-rpm.h b/drivers/interconnect/qcom/smd-rpm.h new file mode 100644 index 000000000000..0f4a3da31cf6 --- /dev/null +++ b/drivers/interconnect/qcom/smd-rpm.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2018, Linaro Ltd. + * Author: Georgi Djakov + */ + +#ifndef __LINUX_INTERCONNECT_QCOM_RPM_H +#define __LINUX_INTERCONNECT_QCOM_RPM_H + +#include + +bool qcom_icc_rpm_smd_available(void); +int qcom_icc_rpm_smd_send(int ctx, int rsc_type, int id, u32 val); + +#endif