From patchwork Tue Apr 23 13:28:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Georgi Djakov X-Patchwork-Id: 10912981 X-Patchwork-Delegate: viresh.linux@gmail.com 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 9DA96112C for ; Tue, 23 Apr 2019 13:28:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8F6AE286F2 for ; Tue, 23 Apr 2019 13:28:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 833862873A; Tue, 23 Apr 2019 13:28:53 +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 32D68286F2 for ; Tue, 23 Apr 2019 13:28:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727827AbfDWN2w (ORCPT ); Tue, 23 Apr 2019 09:28:52 -0400 Received: from mail-lj1-f194.google.com ([209.85.208.194]:41133 "EHLO mail-lj1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727978AbfDWN2j (ORCPT ); Tue, 23 Apr 2019 09:28:39 -0400 Received: by mail-lj1-f194.google.com with SMTP id k8so979445lja.8 for ; Tue, 23 Apr 2019 06:28:38 -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=WBZVH8tY60kvdDXDwV8aJHdGVIEg5lBCBmcPhKf9y2Y=; b=mx7tfKFCrLM+my8sDW7dzzb2SBOnGloSVzmUgLj2SrdsqiYsq+Uq1lnU07zY7h6C5e y0YhFrKkNWfdkTfdMdlbNuKmiaMApa4h+ey7j9Jz639toJrjKFCByOrQXzoM/XHNorPX XJxuAJhHm0Tv57dwC1lVcrZvp1gxj1OPAsHwveMyKCONalWR2wAGlI6E1Q94EM+yggSP XsQNCgnxVz1nZZPTFmuMjHl8RLk2dSsx/7CxPZg8ylVSR+MMKw2rAlrD8vOBAYJhThDL taL/1wBYpNLKnmLsVnUxn7DEHk9MjQ3LCh0f9wXjbuB6Jk14ibwh/E24H+FkhD6mc00m s6xw== 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=WBZVH8tY60kvdDXDwV8aJHdGVIEg5lBCBmcPhKf9y2Y=; b=D5jrBTXoA5qKtz0YMp8on8u2xKHaDL8KqLjegC5Qc9RW3ta3VyQu1YzAoh87ICa7DZ 0CRyld+dUcf+sAxlvkurVsy49gTA/gHlonsl3DiUbmmGcrK2OPQKPTUcn/hjOy7xXJXs jn2YSAaXNx/4NPa2rv3y6mnT0hOFshifF3SXHkIhjWuEgtGs7xiHYBVkQp3mWTfTbqOg +8n33HUXRF1IqbHU9vUpKg48PA0FtpjSswIvO11ge6BpG5MzfOWl/yEb5qKzNlziRVeE a/Yxdan8wu7ZI77fsUTXNS0cvZ52v16esrNivLnn27IX3xnkBlctMetWRzvmc22NLBWb XHTg== X-Gm-Message-State: APjAAAWzLKBmrUB69KKLUph1J4L2uk1DaNcTfg+5gs9cp/60Wipti/uh PDbgTYubHDMKpuWlXH5W7Q3RGA== X-Google-Smtp-Source: APXvYqzNAQqhTw6N2yoD4Bz5LuIxZwqCEb1c1WFtTJ4PtefGrEYIIRNvEmZZ8vqvnt1FgOHQdMxjbA== X-Received: by 2002:a2e:1203:: with SMTP id t3mr3028829lje.180.1556026117559; Tue, 23 Apr 2019 06:28:37 -0700 (PDT) Received: from localhost.localdomain ([212.45.67.2]) by smtp.googlemail.com with ESMTPSA id y206sm4617107lfc.72.2019.04.23.06.28.35 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 23 Apr 2019 06:28:36 -0700 (PDT) From: Georgi Djakov To: vireshk@kernel.org, sboyd@kernel.org, nm@ti.com, robh+dt@kernel.org, mark.rutland@arm.com, rjw@rjwysocki.net Cc: jcrouse@codeaurora.org, 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, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, georgi.djakov@linaro.org Subject: [PATCH v2 5/5] cpufreq: dt: Add support for interconnect bandwidth scaling Date: Tue, 23 Apr 2019 16:28:23 +0300 Message-Id: <20190423132823.7915-6-georgi.djakov@linaro.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190423132823.7915-1-georgi.djakov@linaro.org> References: <20190423132823.7915-1-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 In addition to clocks and regulators, some devices can scale the bandwidth of their on-chip interconnect - for example between CPU and DDR memory. Add support for that, so that platforms which support it can make use of it. Signed-off-by: Georgi Djakov --- drivers/cpufreq/cpufreq-dt.c | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c index bde28878725b..8a20f4d0243e 100644 --- a/drivers/cpufreq/cpufreq-dt.c +++ b/drivers/cpufreq/cpufreq-dt.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -98,6 +99,7 @@ static int resources_available(void) struct device *cpu_dev; struct regulator *cpu_reg; struct clk *cpu_clk; + struct icc_path *cpu_path; int ret = 0; const char *name; @@ -124,6 +126,19 @@ static int resources_available(void) clk_put(cpu_clk); + cpu_path = of_icc_get(cpu_dev, NULL); + ret = PTR_ERR_OR_ZERO(cpu_path); + if (ret) { + if (ret == -EPROBE_DEFER) + dev_dbg(cpu_dev, "defer icc path: %d\n", ret); + else + dev_err(cpu_dev, "failed to get icc path: %d\n", ret); + + return ret; + } + + icc_put(cpu_path); + name = find_supply_name(cpu_dev); /* Platform doesn't require regulator */ if (!name) @@ -203,10 +218,18 @@ static int cpufreq_init(struct cpufreq_policy *policy) } } + opp_table = dev_pm_opp_set_paths(cpu_dev); + if (IS_ERR(opp_table)) { + ret = PTR_ERR(opp_table); + dev_err(cpu_dev, "Failed to set interconnect path for cpu%d: %d\n", + policy->cpu, ret); + goto out_put_regulator; + } + priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) { ret = -ENOMEM; - goto out_put_regulator; + goto out_put_path; } priv->reg_name = name; @@ -288,6 +311,8 @@ static int cpufreq_init(struct cpufreq_policy *policy) if (priv->have_static_opps) dev_pm_opp_of_cpumask_remove_table(policy->cpus); kfree(priv); +out_put_path: + dev_pm_opp_put_paths(opp_table); out_put_regulator: if (name) dev_pm_opp_put_regulators(opp_table);