From patchwork Thu Jun 15 16:50:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephan Gerhold X-Patchwork-Id: 13281539 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 AEA42EB64DA for ; Thu, 15 Jun 2023 16:51:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231532AbjFOQvu (ORCPT ); Thu, 15 Jun 2023 12:51:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49392 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236769AbjFOQvO (ORCPT ); Thu, 15 Jun 2023 12:51:14 -0400 Received: from mo4-p03-ob.smtp.rzone.de (mo4-p03-ob.smtp.rzone.de [85.215.255.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A215F2977; Thu, 15 Jun 2023 09:51:07 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1686847857; cv=none; d=strato.com; s=strato-dkim-0002; b=Yjc0Vuz2dWSmf0y4F5QRSvl7PHgteaxfcp1vUP9WMKFyzTxTfKyeyKTwDgZh5L1iIF nw4wCCx5X3OArGNoOSnYvGElVk9vbeCx/k/KZdYr9MgZMxUsEKB4HvZcgHTVkK0Mhr46 WFsVjG8LXLBsglAu/0xVbCCbDEoLScUtSSbzhQcd5uURAAREh9jfJrDRUxDRHdNDHF+V bjG+Ld9Vc/nnKv8JXr9LVnRbwMLaQGKeZFWHDDb8F2R1VAtjjSGU2KNpPBta58QvawMm yd7CAt2cQ1uQZP2JX200eikgNTLrfjyFZP1i0NQ/aDfYCXfYYI2oPVQjALffG7g1xvAR T1vQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; t=1686847857; s=strato-dkim-0002; d=strato.com; h=Cc:To:In-Reply-To:References:Message-Id:Subject:Date:From:Cc:Date: From:Subject:Sender; bh=Au4TMu9xKZsKryyhqXZKpKI8x4NWUO2Kfst6H6dV5ng=; b=RRzV0mqgZbptj0htyCvrsrbInmunwKLiRPXBtjY+lamHpT0fXsZSf62OZ3WzXmUj8O iX7HVgkrc+CftJQhk95YWSji6HZqGKUnO9vRc3NlwgL5GHAMsBoNVDPxfhIjUUbBtPFS 1lXUOukm/5qXOki58Y3mrGKAkObLsyW63dPp45ocB/s82AzWjtbyHjCDmFg83N5LGirN La/U5oXXgnghiYviaOnYQ7zGpElbO5T5ai+kvzvjDNNKZFDOh3CoclXaGOCypNT3UMZU Z4e7OhGdNL0d+m1bQsjrvIHcCOhipGV74eUO5PpDLHk7gOwisCA4gJWFtRlg/3kug6mp BlTg== ARC-Authentication-Results: i=1; strato.com; arc=none; dkim=none X-RZG-CLASS-ID: mo03 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1686847857; s=strato-dkim-0002; d=gerhold.net; h=Cc:To:In-Reply-To:References:Message-Id:Subject:Date:From:Cc:Date: From:Subject:Sender; bh=Au4TMu9xKZsKryyhqXZKpKI8x4NWUO2Kfst6H6dV5ng=; b=Qn38BmzYwdERkiCdKdRBiGx0JdPiR6nRsBQo+oY5CIU/5WPxJjmQXwpbVGcM0wnEdG b32rZJV6Ovg2QeFYb5RKgFCrLsxOp2fgb50BykffiP8pi0jUrTom3nyumOypmZbffikl I4cAinh+oCkzbIJxUIfGBwaRFkGgPZ//9TLPg0JwHfWlvag1rxCN+SbnpCuK9bXE/7di AQgXvnF6hjW+g0O6583SV6YcuTcOjy7+eXSxgU2n9wO3GErF8bgG1SlMYrSCC6BZcDVp oqUhZr4tmPPgKREduNMWNg/u0ZNK6JOsJR2FAPMxkoqmmJMTzDXZ4OVevvQKdvCi4egb xnkw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; t=1686847857; s=strato-dkim-0003; d=gerhold.net; h=Cc:To:In-Reply-To:References:Message-Id:Subject:Date:From:Cc:Date: From:Subject:Sender; bh=Au4TMu9xKZsKryyhqXZKpKI8x4NWUO2Kfst6H6dV5ng=; b=zCckzR4gaq089ztJtV9K1UYdpCHnqaHKIQPzI9zWxdFZfqvkEqxfRJ7ek9ldibFBtr Oc83cU5p0FtzlqEqYaAA== X-RZG-AUTH: ":P3gBZUipdd93FF5ZZvYFPugejmSTVR2nRPhVOQjVd4CteZ/7jYgS+mLFY+H0JAn9VOf59w==" Received: from [192.168.244.3] by smtp.strato.de (RZmta 49.6.0 DYNA|AUTH) with ESMTPSA id D0d0a8z5FGov42k (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Thu, 15 Jun 2023 18:50:57 +0200 (CEST) From: Stephan Gerhold Date: Thu, 15 Jun 2023 18:50:42 +0200 Subject: [PATCH v3 09/13] soc: qcom: Add RPM processor/subsystem driver MIME-Version: 1.0 Message-Id: <20230531-rpm-rproc-v3-9-a07dcdefd918@gerhold.net> References: <20230531-rpm-rproc-v3-0-a07dcdefd918@gerhold.net> In-Reply-To: <20230531-rpm-rproc-v3-0-a07dcdefd918@gerhold.net> To: Bjorn Andersson Cc: Andy Gross , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Mathieu Poirier , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-remoteproc@vger.kernel.org, Stephan Gerhold X-Mailer: b4 0.12.2 Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org Add a simple driver for the qcom,rpm-proc compatible that registers the "smd-edge" and populates other children defined in the device tree. Note that the DT schema belongs to the remoteproc subsystem while this driver is added inside soc/qcom. I argue that the RPM *is* a remoteproc, but as an implementation detail in Linux it can currently not benefit from anything provided by the remoteproc subsystem. The RPM firmware is usually already loaded and started by earlier components in the boot chain and is not meant to be ever restarted. To avoid breaking existing kernel configurations the driver is always built when smd-rpm.c is also built. They belong closely together anyway. To avoid build errors CONFIG_RPMSG_QCOM_SMD must be also built-in if rpm-proc is. Reviewed-by: Konrad Dybcio Signed-off-by: Stephan Gerhold --- drivers/soc/qcom/Kconfig | 1 + drivers/soc/qcom/Makefile | 2 +- drivers/soc/qcom/rpm-proc.c | 77 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 79 insertions(+), 1 deletion(-) diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig index e597799e8121..715348869d04 100644 --- a/drivers/soc/qcom/Kconfig +++ b/drivers/soc/qcom/Kconfig @@ -191,6 +191,7 @@ config QCOM_SMD_RPM tristate "Qualcomm Resource Power Manager (RPM) over SMD" depends on ARCH_QCOM || COMPILE_TEST depends on RPMSG + depends on RPMSG_QCOM_SMD || RPMSG_QCOM_SMD=n help If you say yes to this option, support will be included for the Resource Power Manager system found in the Qualcomm 8974 based diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile index 99114c71092b..113b9ff2ad43 100644 --- a/drivers/soc/qcom/Makefile +++ b/drivers/soc/qcom/Makefile @@ -18,7 +18,7 @@ obj-$(CONFIG_QCOM_RPM_MASTER_STATS) += rpm_master_stats.o obj-$(CONFIG_QCOM_RPMH) += qcom_rpmh.o qcom_rpmh-y += rpmh-rsc.o qcom_rpmh-y += rpmh.o -obj-$(CONFIG_QCOM_SMD_RPM) += smd-rpm.o +obj-$(CONFIG_QCOM_SMD_RPM) += rpm-proc.o smd-rpm.o obj-$(CONFIG_QCOM_SMEM) += smem.o obj-$(CONFIG_QCOM_SMEM_STATE) += smem_state.o obj-$(CONFIG_QCOM_SMP2P) += smp2p.o diff --git a/drivers/soc/qcom/rpm-proc.c b/drivers/soc/qcom/rpm-proc.c new file mode 100644 index 000000000000..2995d9b90190 --- /dev/null +++ b/drivers/soc/qcom/rpm-proc.c @@ -0,0 +1,77 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Copyright (c) 2021-2023, Stephan Gerhold */ + +#include +#include +#include +#include +#include + +static int rpm_proc_probe(struct platform_device *pdev) +{ + struct qcom_smd_edge *edge = NULL; + struct device *dev = &pdev->dev; + struct device_node *edge_node; + int ret; + + edge_node = of_get_child_by_name(dev->of_node, "smd-edge"); + if (edge_node) { + edge = qcom_smd_register_edge(dev, edge_node); + of_node_put(edge_node); + if (IS_ERR(edge)) + return dev_err_probe(dev, PTR_ERR(edge), + "Failed to register smd-edge\n"); + } + + ret = devm_of_platform_populate(dev); + if (ret) { + dev_err(dev, "Failed to populate child devices: %d\n", ret); + goto err; + } + + platform_set_drvdata(pdev, edge); + return 0; +err: + if (edge) + qcom_smd_unregister_edge(edge); + return ret; +} + +static void rpm_proc_remove(struct platform_device *pdev) +{ + struct qcom_smd_edge *edge = platform_get_drvdata(pdev); + + if (edge) + qcom_smd_unregister_edge(edge); +} + +static const struct of_device_id rpm_proc_of_match[] = { + { .compatible = "qcom,rpm-proc", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, rpm_proc_of_match); + +static struct platform_driver rpm_proc_driver = { + .probe = rpm_proc_probe, + .remove_new = rpm_proc_remove, + .driver = { + .name = "qcom-rpm-proc", + .of_match_table = rpm_proc_of_match, + }, +}; + +static int __init rpm_proc_init(void) +{ + return platform_driver_register(&rpm_proc_driver); +} +arch_initcall(rpm_proc_init); + +static void __exit rpm_proc_exit(void) +{ + platform_driver_unregister(&rpm_proc_driver); +} +module_exit(rpm_proc_exit); + +MODULE_DESCRIPTION("Qualcomm RPM processor/subsystem driver"); +MODULE_AUTHOR("Stephan Gerhold "); +MODULE_LICENSE("GPL");