From patchwork Tue Aug 6 10:55:53 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leonard Crestez X-Patchwork-Id: 11078681 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 1FAB01395 for ; Tue, 6 Aug 2019 10:57:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0B3EE28837 for ; Tue, 6 Aug 2019 10:57:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F308F288D0; Tue, 6 Aug 2019 10:57:17 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 46C9928837 for ; Tue, 6 Aug 2019 10:57:17 +0000 (UTC) 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=FBTYR0s4Zvvn9IxeczweNLqcygNIf86F5xpvYc9aa8w=; b=KxqUxuqLB4EBsxZbLW8g5aRv0Z ch2h6RStRn4t8jWv7z/GKdVLQEnj4+IyppVR2pBLMDpjVGPXWQ6jpiJpWFdGpvlPyMEcipErDZ+x+ BeLeP4yhLdjSLle0RhNpYZ9S1Cp2u6MmGosmteXr7EpX6p92xgT+2UJbpf0JTEf5IQd9CbHCP2sZP 91TakeaMlHORZEroEQ719Fbuc+axvcMYEQtfWjhSSLqRKSYl0V06UI7TDiZoMQfJYV0ZtFNkDRSsj BwPF1tI+TA9MnJQDVVSepqYVGThomfcCfbsSIfKL2TMHG8SPzNlFPel7+HXssTDKCAs8BNQNr8EZ8 GYF1Zfww==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hux9Y-00015h-QC; Tue, 06 Aug 2019 10:57:16 +0000 Received: from inva020.nxp.com ([92.121.34.13]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hux8N-0000Pr-TL for linux-arm-kernel@lists.infradead.org; Tue, 06 Aug 2019 10:56:07 +0000 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 8B7141A05E8; Tue, 6 Aug 2019 12:56:00 +0200 (CEST) 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 735091A05D4; Tue, 6 Aug 2019 12:56:00 +0200 (CEST) Received: from fsr-ub1864-112.ea.freescale.net (fsr-ub1864-112.ea.freescale.net [10.171.82.98]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id 802B5205DD; Tue, 6 Aug 2019 12:55:59 +0200 (CEST) From: Leonard Crestez To: Georgi Djakov , Rob Herring , =?utf-8?b?QXJ0dXIgxZp3aWdvxYQ=?= , Alexandre Bailon , Viresh Kumar Subject: [RFCv3 2/3] interconnect: Add imx core driver Date: Tue, 6 Aug 2019 13:55:53 +0300 Message-Id: <2b8905754d9a3fa6f4dc7b73b45649c85aa3e80a.1565088423.git.leonard.crestez@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190806_035604_226100_EA3A605D X-CRM114-Status: GOOD ( 18.67 ) 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: Mark Rutland , Dong Aisheng , Jacky Bai , Saravana Kannan , Anson Huang , Stephen Boyd , Michael Turquette , linux-pm@vger.kernel.org, Krzysztof Kozlowski , Chanwoo Choi , Kyungmin Park , MyungJoo Ham , linux-imx@nxp.com, kernel@pengutronix.de, Fabio Estevam , Shawn Guo , devicetree@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 X-Virus-Scanned: ClamAV using ClamSMTP This adds support for i.MX SoC family to interconnect framework. Platform drivers can describe their interconnect graph and several adjustment knobs where an icc node bandwith converted to a clk_min_rate request. All adjustable nodes are assumed to be independent. Based on an earlier work by Alexandre Bailon but greatly reduced to drop "platform opp" support. Signed-off-by: Leonard Crestez Signed-off-by: Alexandre Bailon --- drivers/interconnect/Kconfig | 1 + drivers/interconnect/Makefile | 1 + drivers/interconnect/imx/Kconfig | 5 + drivers/interconnect/imx/Makefile | 1 + drivers/interconnect/imx/imx.c | 258 ++++++++++++++++++++++++++++++ drivers/interconnect/imx/imx.h | 62 +++++++ 6 files changed, 328 insertions(+) create mode 100644 drivers/interconnect/imx/Kconfig create mode 100644 drivers/interconnect/imx/Makefile create mode 100644 drivers/interconnect/imx/imx.c create mode 100644 drivers/interconnect/imx/imx.h diff --git a/drivers/interconnect/Kconfig b/drivers/interconnect/Kconfig index bfa4ca3ab7a9..e61802230f90 100644 --- a/drivers/interconnect/Kconfig +++ b/drivers/interconnect/Kconfig @@ -10,7 +10,8 @@ menuconfig INTERCONNECT If unsure, say no. if INTERCONNECT source "drivers/interconnect/qcom/Kconfig" +source "drivers/interconnect/imx/Kconfig" endif diff --git a/drivers/interconnect/Makefile b/drivers/interconnect/Makefile index 28f2ab0824d5..20a13b7eb37f 100644 --- a/drivers/interconnect/Makefile +++ b/drivers/interconnect/Makefile @@ -2,5 +2,6 @@ icc-core-objs := core.o obj-$(CONFIG_INTERCONNECT) += icc-core.o obj-$(CONFIG_INTERCONNECT_QCOM) += qcom/ +obj-$(CONFIG_INTERCONNECT_IMX) += imx/ diff --git a/drivers/interconnect/imx/Kconfig b/drivers/interconnect/imx/Kconfig new file mode 100644 index 000000000000..45fbae7007af --- /dev/null +++ b/drivers/interconnect/imx/Kconfig @@ -0,0 +1,5 @@ +config INTERCONNECT_IMX + bool "i.MX interconnect drivers" + depends on ARCH_MXC || ARCH_MXC_ARM64 || COMPILE_TEST + help + Generic interconnect driver for i.MX SOCs diff --git a/drivers/interconnect/imx/Makefile b/drivers/interconnect/imx/Makefile new file mode 100644 index 000000000000..bb92fd9fe4a5 --- /dev/null +++ b/drivers/interconnect/imx/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_INTERCONNECT_IMX) += imx.o diff --git a/drivers/interconnect/imx/imx.c b/drivers/interconnect/imx/imx.c new file mode 100644 index 000000000000..cc838e40419e --- /dev/null +++ b/drivers/interconnect/imx/imx.c @@ -0,0 +1,258 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Interconnect framework driver for i.MX SoC + * + * Copyright (c) 2019, BayLibre + * Copyright (c) 2019, NXP + * Author: Alexandre Bailon + * Author: Leonard Crestez + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "imx.h" + +/* private icc_provider data */ +struct imx_icc_provider { + struct device *dev; +}; + +/* private icc_node data */ +struct imx_icc_node { + const struct imx_icc_node_desc *desc; + struct devfreq *devfreq; + struct dev_pm_qos_request qos_req; +}; + +static int imx_icc_aggregate(struct icc_node *node, u32 avg_bw, + u32 peak_bw, u32 *agg_avg, u32 *agg_peak) +{ + *agg_avg += avg_bw; + *agg_peak = max(*agg_peak, peak_bw); + + return 0; +} + +static struct icc_node* imx_icc_xlate(struct of_phandle_args *spec, void *data) +{ + struct imx_icc_provider *desc = data; + struct icc_provider *provider = dev_get_drvdata(desc->dev); + unsigned int id = spec->args[0]; + struct icc_node *node; + + list_for_each_entry (node, &provider->nodes, node_list) + if (node->id == id) + return node; + + return ERR_PTR(-EINVAL); +} + +static int imx_icc_node_set(struct icc_node *node) +{ + struct device *dev = node->provider->dev; + struct imx_icc_node *node_data = node->data; + unsigned long freq; + + if (!node_data->devfreq) + return 0; + + freq = (node->avg_bw + node->peak_bw) * node_data->desc->adj->bw_mul; + do_div(freq, node_data->desc->adj->bw_div); + if (freq > INT_MAX) { + dev_err(dev, "%s can't request more INT_MAX freq\n", + node->name); + return -ERANGE; + } + + dev_dbg(dev, "%s avg_bw %u peak_bw %u min_freq %lu\n", + node->name, node->avg_bw, node->peak_bw, freq); + + dev_pm_qos_update_request(&node_data->qos_req, freq); + + return 0; +} + +static int imx_icc_set(struct icc_node *src, struct icc_node *dst) +{ + return imx_icc_node_set(dst); +} + +static int imx_icc_node_init_devfreq(struct device *dev, + struct icc_node *node) +{ + struct imx_icc_node *node_data = node->data; + const struct imx_icc_node_desc *node_desc = node_data->desc; + int index; + int ret; + + index = of_property_match_string(dev->of_node, + "devfreq-names", node_desc->adj->devfreq_name); + if (index < 0) { + dev_err(dev, "failed to match devfreq-names %s: %d\n", + node_desc->adj->devfreq_name, index); + return index; + } + + node_data->devfreq = devfreq_get_devfreq_by_phandle(dev, index); + if (IS_ERR(node_data->devfreq)) { + ret = PTR_ERR(node_data->devfreq); + if (ret != -EPROBE_DEFER) + dev_err(dev, "failed to fetch devfreq %d %s: %d\n", + index, node_desc->adj->devfreq_name, ret); + return ret; + } + + return dev_pm_qos_add_request(node_data->devfreq->dev.parent, + &node_data->qos_req, + DEV_PM_QOS_MIN_FREQUENCY, 0); +} + +static struct icc_node *imx_icc_node_add(struct icc_provider *provider, + const struct imx_icc_node_desc *node_desc) +{ + struct imx_icc_provider *provider_data = provider->data; + struct device *dev = provider_data->dev; + struct imx_icc_node *node_data; + struct icc_node *node; + int ret; + + node = icc_node_create(node_desc->id); + if (IS_ERR(node)) { + dev_err(dev, "failed to create node %d\n", node_desc->id); + return node; + } + + if (node->data) { + dev_err(dev, "already created node %s id=%d\n", + node_desc->name, node_desc->id); + return ERR_PTR(-EEXIST); + } + + node_data = devm_kzalloc(dev, sizeof(*node_data), GFP_KERNEL); + if (!node_data) { + icc_node_destroy(node->id); + return ERR_PTR(-ENOMEM); + } + + node->name = node_desc->name; + node->data = node_data; + node_data->desc = node_desc; + if (node_desc->adj) { + ret = imx_icc_node_init_devfreq(dev, node); + if (ret < 0) { + icc_node_destroy(node->id); + return ERR_PTR(ret); + } + } + + icc_node_add(node, provider); + + return node; +} + +static void imx_icc_unregister_nodes(struct icc_provider *provider) +{ + struct icc_node *node, *tmp; + + list_for_each_entry_safe(node, tmp, &provider->nodes, node_list) { + struct imx_icc_node *node_data = node->data; + + icc_node_del(node); + icc_node_destroy(node->id); + if (dev_pm_qos_request_active(&node_data->qos_req)) + dev_pm_qos_remove_request(&node_data->qos_req); + } +} + +static int imx_icc_register_nodes(struct icc_provider *provider, + const struct imx_icc_node_desc *descs, + int count) +{ + int ret; + int i; + + for (i = 0; i < count; i++) { + struct icc_node *node; + const struct imx_icc_node_desc *node_desc = &descs[i]; + size_t j; + + node = imx_icc_node_add(provider, node_desc); + if (IS_ERR(node)) { + ret = PTR_ERR(node); + if (ret != -EPROBE_DEFER) + dev_err(provider->dev, "failed to add %s: %d\n", + node_desc->name, ret); + goto err; + } + + for (j = 0; j < node_desc->num_links; j++) + icc_link_create(node, node_desc->links[j]); + } + + return 0; + +err: + imx_icc_unregister_nodes(provider); + + return ret; +} + +int imx_icc_register(struct platform_device *pdev, + struct imx_icc_node_desc *nodes, int nodes_count) +{ + struct device *dev = &pdev->dev; + struct imx_icc_provider *desc; + struct icc_provider *provider; + int ret; + + desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL); + if (!desc) + return -ENOMEM; + desc->dev = dev; + + provider = devm_kzalloc(dev, sizeof(*provider), GFP_KERNEL); + if (!provider) + return -ENOMEM; + provider->set = imx_icc_set; + provider->aggregate = imx_icc_aggregate; + provider->xlate = imx_icc_xlate; + provider->data = desc; + provider->dev = dev; + platform_set_drvdata(pdev, provider); + + ret = icc_provider_add(provider); + if (ret) { + dev_err(dev, "error adding interconnect provider\n"); + return ret; + } + + ret = imx_icc_register_nodes(provider, nodes, nodes_count); + if (ret) { + dev_err(dev, "error adding interconnect nodes\n"); + goto provider_del; + } + + return 0; + +provider_del: + icc_provider_del(provider); + return ret; +} +EXPORT_SYMBOL_GPL(imx_icc_register); + +int imx_icc_unregister(struct platform_device *pdev) +{ + struct icc_provider *provider = platform_get_drvdata(pdev); + + icc_provider_del(provider); + imx_icc_unregister_nodes(provider); + + return 0; +} +EXPORT_SYMBOL_GPL(imx_icc_unregister); diff --git a/drivers/interconnect/imx/imx.h b/drivers/interconnect/imx/imx.h new file mode 100644 index 000000000000..ab191eb89616 --- /dev/null +++ b/drivers/interconnect/imx/imx.h @@ -0,0 +1,62 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Interconnect framework driver for i.MX SoC + * + * Copyright (c) 2019, BayLibre + * Copyright (c) 2019, NXP + * Author: Alexandre Bailon + * Author: Leonard Crestez + */ +#ifndef __BUSFREQ_H +#define __BUSFREQ_H + +#include + +#define IMX_ICC_MAX_LINKS 32 +#define IMX_ICC_UNDEFINED_BW 0xffffffff + +/* + * struct imx_icc_node_adj - Describe an dynamic adjustment knob + */ +struct imx_icc_node_adj_desc { + const char *devfreq_name; + unsigned int bw_mul, bw_div; +}; + +/* + * struct imx_icc_node - Describe an interconnect node + * @name: name of the node + * @id: an unique id to identify the node + * @links: an array of slaves' node id + * @num_links: number of id defined in links + */ +struct imx_icc_node_desc { + const char *name; + u16 id; + u16 links[IMX_ICC_MAX_LINKS]; + u16 num_links; + + const struct imx_icc_node_adj_desc *adj; +}; + +#define DEFINE_BUS_INTERCONNECT(_name, _id, _adj, _numlinks, ...) \ + { \ + .id = _id, \ + .name = _name, \ + .adj = _adj, \ + .num_links = _numlinks, \ + .links = { __VA_ARGS__ }, \ + } + +#define DEFINE_BUS_MASTER(_name, _id, _dest_id) \ + DEFINE_BUS_INTERCONNECT(_name, _id, NULL, 1, _dest_id) + +#define DEFINE_BUS_SLAVE(_name, _id, _adj) \ + DEFINE_BUS_INTERCONNECT(_name, _id, _adj, 0) + +int imx_icc_register(struct platform_device *pdev, + struct imx_icc_node_desc *nodes, + int nodes_count); +int imx_icc_unregister(struct platform_device *pdev); + +#endif /* __BUSFREQ_H */