From patchwork Tue May 12 12:53:24 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Georgi Djakov X-Patchwork-Id: 212054 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 18EEAC54E8B for ; Tue, 12 May 2020 12:54:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EA6A120736 for ; Tue, 12 May 2020 12:54:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="hRQiCfER" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729645AbgELMyp (ORCPT ); Tue, 12 May 2020 08:54:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51562 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1729982AbgELMyJ (ORCPT ); Tue, 12 May 2020 08:54:09 -0400 Received: from mail-wr1-x444.google.com (mail-wr1-x444.google.com [IPv6:2a00:1450:4864:20::444]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E2642C061A0F for ; Tue, 12 May 2020 05:54:08 -0700 (PDT) Received: by mail-wr1-x444.google.com with SMTP id e16so15231849wra.7 for ; Tue, 12 May 2020 05:54:08 -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=UrDz0VtEFIllRgR/SygMJHwSLsI5h5gjPBKpNjucqnU=; b=hRQiCfERNwcKeaXH+vBgWstpdhfVeFUqZ1HMM5gInNFUPCUmTIxlN+nW06ZqEyr1MT WJt82jfFMhSh3/RaGC13yJslFwkNU9IP5rTAXxevITstBNNe0Q0GqLiQ8X/4kMoTb5St 9DB5LdqtelZUdP4aOiA8r4r6CKfpEsAkHPc+1ZB0OvODMQGzdCislqEz/wGa5WTmLoY2 d/LAisGXl4ceWObzMaSX+TnByQmuW6rujCdNxrDyZktJU5cYwJDxyLT3uqKLbzHAA/zv 4Q+Skz9YusrYZTS4w02hgcM5lS0pRpHRcUHCIILUcGrWW36OTz9Rc638ZOyVZKUaow2B luIw== 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=UrDz0VtEFIllRgR/SygMJHwSLsI5h5gjPBKpNjucqnU=; b=J6lgp1hw77RLYT/jcdXXWoaCuU4GVLUWe8ORN5O6mE0iNoITYbC2vQ9TidUiLWtgJv h7BQlnwRx8vcDHg0LSMrgJK1bgAgoA00TWy9PIl49rYVia29wV5TxMUqF4WOTli0OCIt 4gbVW89xRQDMgpQDJ2UMQYThCN+hZ9PYbRe/zxa3bUi1PIXmmVU7rggexl1COvAKSHny JjMELNjyJxu6T8xh3+AeyHljZceNYEyme0flmBj49uPsQmDP9ezflaxhNo9MAdloZBEH 7knt9OoQNBIHeINxhrPmMrKYAYyBcVjP1v2KnBr4yYw7eym46aQGxIEBP6b9x5rL/3KD iFPA== X-Gm-Message-State: AGi0PuYT5EnQoh34i3hihrfwBZprQPk+6C2Ne+FxwkWlHT+RWFL2y+bm pLjjN7DmDZ5A9dogh2E2LAeTmA== X-Google-Smtp-Source: APiQypKf6IbOeOx+5EfHUUqCWzbaipquaePVOHE175HL0LBNU9ynasyUz/CcO62uWiKdOHOo00HWLA== X-Received: by 2002:a5d:614b:: with SMTP id y11mr26414026wrt.77.1589288047573; Tue, 12 May 2020 05:54:07 -0700 (PDT) Received: from localhost.localdomain (212-39-89-66.ip.btc-net.bg. [212.39.89.66]) by smtp.googlemail.com with ESMTPSA id n13sm2433938wrs.2.2020.05.12.05.54.05 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 12 May 2020 05:54:06 -0700 (PDT) From: Georgi Djakov To: vireshk@kernel.org, nm@ti.com, sboyd@kernel.org, rjw@rjwysocki.net, saravanak@google.com, sibis@codeaurora.org, mka@chromium.org Cc: robh+dt@kernel.org, rnayak@codeaurora.org, bjorn.andersson@linaro.org, vincent.guittot@linaro.org, jcrouse@codeaurora.org, evgreen@chromium.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, georgi.djakov@linaro.org Subject: [PATCH v8 07/10] cpufreq: dt: Add support for interconnect bandwidth scaling Date: Tue, 12 May 2020 15:53:24 +0300 Message-Id: <20200512125327.1868-8-georgi.djakov@linaro.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200512125327.1868-1-georgi.djakov@linaro.org> References: <20200512125327.1868-1-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 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. Reviewed-by: Matthias Kaehlcke Signed-off-by: Georgi Djakov --- v8: * Picked reviewed-by tag. * Added a separate patch to check the number of paths in DT and validate each one of them. drivers/cpufreq/Kconfig | 1 + drivers/cpufreq/cpufreq-dt.c | 15 +++++++++++++++ 2 files changed, 16 insertions(+) diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig index c3e6bd59e920..db2ad54ee67f 100644 --- a/drivers/cpufreq/Kconfig +++ b/drivers/cpufreq/Kconfig @@ -217,6 +217,7 @@ config CPUFREQ_DT config CPUFREQ_DT_PLATDEV bool + depends on INTERCONNECT || !INTERCONNECT help This adds a generic DT based cpufreq platdev driver for frequency management. This creates a 'cpufreq-dt' platform device, on the diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c index 26fe8dfb9ce6..4ecef3257532 100644 --- a/drivers/cpufreq/cpufreq-dt.c +++ b/drivers/cpufreq/cpufreq-dt.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -95,6 +96,7 @@ 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; @@ -121,6 +123,19 @@ 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)