From patchwork Tue Jul 23 14:23:37 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Georgi Djakov X-Patchwork-Id: 11054599 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1232213B1 for ; Tue, 23 Jul 2019 14:23:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 04A0F22A2A for ; Tue, 23 Jul 2019 14:23:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EC3DA28474; Tue, 23 Jul 2019 14:23:52 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI 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 84F372860A for ; Tue, 23 Jul 2019 14:23:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388179AbfGWOXw (ORCPT ); Tue, 23 Jul 2019 10:23:52 -0400 Received: from mail-lj1-f195.google.com ([209.85.208.195]:37368 "EHLO mail-lj1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390074AbfGWOXv (ORCPT ); Tue, 23 Jul 2019 10:23:51 -0400 Received: by mail-lj1-f195.google.com with SMTP id z28so41325602ljn.4 for ; Tue, 23 Jul 2019 07:23:50 -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 :mime-version:content-transfer-encoding; bh=oYU5uExLdvkd3JySXo4ikuWuU9TKWBHt3CrzgnJWCNA=; b=dPqki8ih91xsb4gJhR/9Xcf6J/YbqCIpXb1A5GmOjH8xwHK0jukrf0nRMY5ktPDnKW a7Zju9SwtVgvgQydRt2flh2dnh345wbQNNbrlNAd+4rmnLxBQT9kMrvxNMJoC6NlEzOH nHNWb7PdQ8PHp2NodheRMTJEsfNwKzooTXfUG0r1l2rtIk86/B88s9644QpxA5D5IXUT 4w0mc6DsRkH5tkTPsVhWwg0VISWjkwdei6T7ra1S0NRGaJWF8SJoIy2vEaupo6m+MHIM 43Q90SR/MY5DYD3ttiTelTV2T4pLxz4nwtpXY/hhz4EmkdxlsUaefL1+f6ye0hj6idZg ifFw== 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:mime-version:content-transfer-encoding; bh=oYU5uExLdvkd3JySXo4ikuWuU9TKWBHt3CrzgnJWCNA=; b=lfNJlxdJIPJZ9Nefq81wPxg/DSAz6RPer99zjbWQj79pMkZiiIk+/0UNqgzpLcIUqN dZ5HdHgZOoGlw/dRupHQrV6Ef1Imy2T+xtY76U5a/Ap4ZaIa56XIcavyiTLtnrplB5Ff uYPn/vy1lZ1qaKCw0xeGKjsKqy7BDwAACHwPkI+8XUmgBqt3y09ImlE6Gs42qSjOWZ/0 9/Ixg6n8z0tCog3Ax77kLXDgfuB1eIeEza+Kl3hTyh90a/TMitxLx8IhBpdgs+k5Q9PG argDC1b3gDTQgJV5RVDtFP4KUVYAy/gn0qeqy/JSv+rG9UpUF9DJToajMr3MrEIrf19y 0T6Q== X-Gm-Message-State: APjAAAVAlp0CEo8rvc4Vj9eE575X+bxIOrcByQN0PGQLcQZruxrR4zj8 6FrR5yeG/rUCJ54DhP2DACqsDA== X-Google-Smtp-Source: APXvYqzQKMVJc6bZ4dymBIQWNd+dKbCefWlmWeLQmo6McVg2bKKvZjqnlYARDSeEQjKF3QbDSDFOtQ== X-Received: by 2002:a2e:9858:: with SMTP id e24mr16411197ljj.91.1563891828744; Tue, 23 Jul 2019 07:23:48 -0700 (PDT) Received: from localhost.localdomain ([212.45.67.2]) by smtp.googlemail.com with ESMTPSA id z17sm8048519ljc.37.2019.07.23.07.23.47 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 23 Jul 2019 07:23:48 -0700 (PDT) From: Georgi Djakov To: robh+dt@kernel.org, bjorn.andersson@linaro.org, agross@kernel.org, georgi.djakov@linaro.org Cc: vkoul@kernel.org, evgreen@chromium.org, daidavid1@codeaurora.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org Subject: [PATCH v5 3/5] interconnect: qcom: Add interconnect SMD over SMD driver Date: Tue, 23 Jul 2019 17:23:37 +0300 Message-Id: <20190723142339.27772-4-georgi.djakov@linaro.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190723142339.27772-1-georgi.djakov@linaro.org> References: <20190723142339.27772-1-georgi.djakov@linaro.org> MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 communication with this remote processor. Reviewed-by: Bjorn Andersson Signed-off-by: Georgi Djakov --- v5: - Use the more succinct return !!icc_smd_rpm; - Picked Bjorn's r-b. v4: - Hide the driver from config menu. It will be selected by other driver. - Add remove() function to zero out the rpm handle. v3: - New patch. drivers/interconnect/qcom/Kconfig | 3 ++ drivers/interconnect/qcom/Makefile | 2 + drivers/interconnect/qcom/smd-rpm.c | 77 +++++++++++++++++++++++++++++ drivers/interconnect/qcom/smd-rpm.h | 15 ++++++ 4 files changed, 97 insertions(+) create mode 100644 drivers/interconnect/qcom/smd-rpm.c create mode 100644 drivers/interconnect/qcom/smd-rpm.h diff --git a/drivers/interconnect/qcom/Kconfig b/drivers/interconnect/qcom/Kconfig index d5e70ebc2410..03fd67173494 100644 --- a/drivers/interconnect/qcom/Kconfig +++ b/drivers/interconnect/qcom/Kconfig @@ -12,3 +12,6 @@ config INTERCONNECT_QCOM_SDM845 help This is a driver for the Qualcomm Network-on-Chip on sdm845-based platforms. + +config INTERCONNECT_QCOM_SMD_RPM + tristate diff --git a/drivers/interconnect/qcom/Makefile b/drivers/interconnect/qcom/Makefile index 1c1cea690f92..a600cf6cc272 100644 --- a/drivers/interconnect/qcom/Makefile +++ b/drivers/interconnect/qcom/Makefile @@ -1,5 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 qnoc-sdm845-objs := sdm845.o +icc-smd-rpm-objs := smd-rpm.o obj-$(CONFIG_INTERCONNECT_QCOM_SDM845) += qnoc-sdm845.o +obj-$(CONFIG_INTERCONNECT_QCOM_SMD_RPM) += icc-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..dc8ff8d133a9 --- /dev/null +++ b/drivers/interconnect/qcom/smd-rpm.c @@ -0,0 +1,77 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * RPM over SMD communication wrapper for interconnects + * + * Copyright (C) 2019 Linaro Ltd + * Author: Georgi Djakov + */ + +#include +#include +#include +#include +#include +#include + +#include "smd-rpm.h" + +#define RPM_KEY_BW 0x00007762 + +static struct qcom_smd_rpm *icc_smd_rpm; + +struct icc_rpm_smd_req { + __le32 key; + __le32 nbytes; + __le32 value; +}; + +bool qcom_icc_rpm_smd_available(void) +{ + return !!icc_smd_rpm; +} +EXPORT_SYMBOL_GPL(qcom_icc_rpm_smd_available); + +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_smd_rpm, ctx, rsc_type, id, &req, + sizeof(req)); +} +EXPORT_SYMBOL_GPL(qcom_icc_rpm_smd_send); + +static int qcom_icc_rpm_smd_remove(struct platform_device *pdev) +{ + icc_smd_rpm = NULL; + + return 0; +} + +static int qcom_icc_rpm_smd_probe(struct platform_device *pdev) +{ + icc_smd_rpm = dev_get_drvdata(pdev->dev.parent); + + if (!icc_smd_rpm) { + dev_err(&pdev->dev, "unable to retrieve handle to RPM\n"); + return -ENODEV; + } + + return 0; +} + +static struct platform_driver qcom_interconnect_rpm_smd_driver = { + .driver = { + .name = "icc_smd_rpm", + }, + .probe = qcom_icc_rpm_smd_probe, + .remove = qcom_icc_rpm_smd_remove, +}; +module_platform_driver(qcom_interconnect_rpm_smd_driver); +MODULE_AUTHOR("Georgi Djakov "); +MODULE_DESCRIPTION("Qualcomm SMD RPM interconnect proxy driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:icc_smd_rpm"); diff --git a/drivers/interconnect/qcom/smd-rpm.h b/drivers/interconnect/qcom/smd-rpm.h new file mode 100644 index 000000000000..ca9d0327b8ac --- /dev/null +++ b/drivers/interconnect/qcom/smd-rpm.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2019, Linaro Ltd. + * Author: Georgi Djakov + */ + +#ifndef __DRIVERS_INTERCONNECT_QCOM_SMD_RPM_H +#define __DRIVERS_INTERCONNECT_QCOM_SMD_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