From patchwork Fri Jun 14 04:17:31 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravana Kannan X-Patchwork-Id: 10994273 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 07851924 for ; Fri, 14 Jun 2019 04:18:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ED75727B81 for ; Fri, 14 Jun 2019 04:18:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E133727D0E; Fri, 14 Jun 2019 04:18:11 +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=-15.5 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, USER_IN_DEF_DKIM_WL autolearn=ham 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 D111727B81 for ; Fri, 14 Jun 2019 04:18:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726442AbfFNESK (ORCPT ); Fri, 14 Jun 2019 00:18:10 -0400 Received: from mail-qt1-f201.google.com ([209.85.160.201]:39247 "EHLO mail-qt1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726305AbfFNESH (ORCPT ); Fri, 14 Jun 2019 00:18:07 -0400 Received: by mail-qt1-f201.google.com with SMTP id o16so1076415qtj.6 for ; Thu, 13 Jun 2019 21:18:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=qdT885hM1gH99LBPR29/QhPlOeEng+ZQVjJx3w/T2/A=; b=Dibo09Bp3kWBRUtDeP7IlyAc8I0wb5LIZgKw4P/3gbfzowHYQkp8KvALWATtiLifF/ OgCNRHwq7V+KkgVUnp2yHEc5qXgQOOZOU05XPJf5NBPt7CFtICrUUykTd+lcCKR2SeaH K8ap0c9N6Jtz99rLRSHAmXzVlbK7jOXBUJEHtsxFtyGsBLyuM5VIeZva8JKgYA23JX/N V86388Avy5hjadcoyqZyv0uUZa1C2g5SS1ewUTpb96wNgW5h0/gF+cwveNdnSk4KmXt2 AK0RwUJDKxDAAnSfec6Xw2aoL5IOX9brzOp4yMwqt66AqibDVqTYNc91iTNpUHDOSazs wxZg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=qdT885hM1gH99LBPR29/QhPlOeEng+ZQVjJx3w/T2/A=; b=nGVSDUrvyrMi+et4r/B+4CcXNYpjH5bgrfSGeXPVK9/k9Y1KEO1B7QqFJ7gbR78uil UbutBUDG8mcsJrIzwvHwT+gyn4upY8tKzSuB6XV6+uBvVKSvzXQeI9gceQ/LBR+yKvgW ZDRZPlgXOiAL8oLja5juW/cTl/Na4Jnej/TLi4BQO/DNB/zoKPalLZEvjYMvsOjVC9n2 Szg+AI6rnwH3XZVYTxpDkkUVSjI/Ri2b6XXY434e2FzBvQmH8q0nEYX96Hnj3RzCW1iN K3YTJKM/y/6qRkFqrDcrvOQjkVZpv5HaLkhiESOEpr+QTxfyQ+bKiLGlQ8NwjWlRdrZT 7u5Q== X-Gm-Message-State: APjAAAX25GY+Stl4nL9wQXK0B2V5PPokj7dI8Ng/ox9zpPbZQ4B+3VZz 8YWgUGZN4AHtoT8JrVerpE1m36zvKAQkNPU= X-Google-Smtp-Source: APXvYqyAWOehY93Rqe16/u7/vHBPBduhgTp81nR2/LNC3uUbwpe11mkeC0KZI8SICRtKOwtW6xRTN9Xb5zISKBc= X-Received: by 2002:ac8:4619:: with SMTP id p25mr46145520qtn.73.1560485886113; Thu, 13 Jun 2019 21:18:06 -0700 (PDT) Date: Thu, 13 Jun 2019 21:17:31 -0700 In-Reply-To: <20190614041733.120807-1-saravanak@google.com> Message-Id: <20190614041733.120807-10-saravanak@google.com> Mime-Version: 1.0 References: <20190614041733.120807-1-saravanak@google.com> X-Mailer: git-send-email 2.22.0.rc2.383.gf4fbbf30c2-goog Subject: [PATCH v2 09/11] interconnect: Add OPP table support for interconnects From: Saravana Kannan To: Georgi Djakov , Rob Herring , Mark Rutland , Viresh Kumar , Nishanth Menon , Stephen Boyd , "Rafael J. Wysocki" , MyungJoo Ham , Kyungmin Park , Chanwoo Choi Cc: Saravana Kannan , Rajendra Nayak , Jordan Crouse , vincent.guittot@linaro.org, bjorn.andersson@linaro.org, amit.kucheria@linaro.org, seansw@qti.qualcomm.com, daidavid1@codeaurora.org, evgreen@chromium.org, sibis@codeaurora.org, kernel-team@android.com, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org 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 Interconnect paths can have different performance points. Now that OPP framework supports bandwidth OPP tables, add OPP table support for interconnects. Devices can use the interconnect-opp-table DT property to specify OPP tables for interconnect paths. And the driver can obtain the OPP table for an interconnect path by calling icc_get_opp_table(). Signed-off-by: Saravana Kannan --- drivers/interconnect/core.c | 27 ++++++++++++++++++++++++++- include/linux/interconnect.h | 7 +++++++ 2 files changed, 33 insertions(+), 1 deletion(-) diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c index 871eb4bc4efc..881bac80bc1e 100644 --- a/drivers/interconnect/core.c +++ b/drivers/interconnect/core.c @@ -47,6 +47,7 @@ struct icc_req { */ struct icc_path { size_t num_nodes; + struct opp_table *opp_table; struct icc_req reqs[]; }; @@ -313,7 +314,7 @@ struct icc_path *of_icc_get(struct device *dev, const char *name) { struct icc_path *path = ERR_PTR(-EPROBE_DEFER); struct icc_node *src_node, *dst_node; - struct device_node *np = NULL; + struct device_node *np = NULL, *opp_node; struct of_phandle_args src_args, dst_args; int idx = 0; int ret; @@ -381,10 +382,34 @@ struct icc_path *of_icc_get(struct device *dev, const char *name) dev_err(dev, "%s: invalid path=%ld\n", __func__, PTR_ERR(path)); mutex_unlock(&icc_lock); + opp_node = of_parse_phandle(np, "interconnect-opp-table", idx); + if (opp_node) { + path->opp_table = dev_pm_opp_of_find_table_from_node(opp_node); + of_node_put(opp_node); + } + + return path; } EXPORT_SYMBOL_GPL(of_icc_get); +/** + * icc_get_opp_table() - Get the OPP table that corresponds to a path + * @path: reference to the path returned by icc_get() + * + * This function will return the OPP table that corresponds to a path handle. + * If the interconnect API is disabled, NULL is returned and the consumer + * drivers will still build. Drivers are free to handle this specifically, but + * they don't have to. + * + * Return: opp_table pointer on success. NULL is returned when the API is + * disabled or the OPP table is missing. + */ +struct opp_table *icc_get_opp_table(struct icc_path *path) +{ + return path->opp_table; +} + /** * icc_set_bw() - set bandwidth constraints on an interconnect path * @path: reference to the path returned by icc_get() diff --git a/include/linux/interconnect.h b/include/linux/interconnect.h index dc25864755ba..0c0bc55f0e89 100644 --- a/include/linux/interconnect.h +++ b/include/linux/interconnect.h @@ -9,6 +9,7 @@ #include #include +#include /* macros for converting to icc units */ #define Bps_to_icc(x) ((x) / 1000) @@ -28,6 +29,7 @@ struct device; struct icc_path *icc_get(struct device *dev, const int src_id, const int dst_id); struct icc_path *of_icc_get(struct device *dev, const char *name); +struct opp_table *icc_get_opp_table(struct icc_path *path); void icc_put(struct icc_path *path); int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw); @@ -49,6 +51,11 @@ static inline void icc_put(struct icc_path *path) { } +static inline struct opp_table *icc_get_opp_table(struct icc_path *path) +{ + return NULL; +} + static inline int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw) { return 0;