From patchwork Mon Oct 25 22:40:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 12583295 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8E40BC433EF for ; Mon, 25 Oct 2021 22:47:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7A6A660295 for ; Mon, 25 Oct 2021 22:47:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234326AbhJYWtk (ORCPT ); Mon, 25 Oct 2021 18:49:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41628 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235162AbhJYWso (ORCPT ); Mon, 25 Oct 2021 18:48:44 -0400 Received: from mail-lf1-x12c.google.com (mail-lf1-x12c.google.com [IPv6:2a00:1450:4864:20::12c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5F392C06122A; Mon, 25 Oct 2021 15:46:05 -0700 (PDT) Received: by mail-lf1-x12c.google.com with SMTP id bi35so8198186lfb.9; Mon, 25 Oct 2021 15:46:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=XsOEhjkUhTdgMSc22kkFusFUBhIANMrBQmQiF+ReJpU=; b=E7FYFLFlA71U4xnertpyrEESIpi/uTjKYOpBO/wafX2Lji47exwcfYKt6u7LzJogks 56beQhICIxRgBNhYlgbYwJfGngvqxYRJDbg/4SHdJ2xrPvtgzMDi8YnU3Y/hJfLYZzkt Ffrv5QPUy0ZWgw3/CO+IGbtPMB71v/aP3/KQiRRp94s1kLGgbIiHy+RuUykN95WSfXJi S9o66PF7fGhig6YLWzOLqHaRS9MeOOVYA6HI/lvERoCH0GrC1LyrSl5p2es7kQnsdjTE M5uJty3sbDJwDj48Zag0jyzdmCbdR97wQ06a63gMG9lLwunYHRbE5CvkiXYzxkLoS6WE Ntiw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=XsOEhjkUhTdgMSc22kkFusFUBhIANMrBQmQiF+ReJpU=; b=ajHl791PpBOPE4ZQEPOVl6R8cqyQ+7nLC8esJFIlr8/nD6G/nYg32oTqY/c7VstKgp wzg+6hf05bz0Wt8TklAGF1gsBU7bCDsJha54ZxXC51lTNuypjTCy/bCiNzO21PQI+j9r WLKEg8kzq4nqLVhpWJHNj56TU8zCbKRvsab7gpr0JJkUTJalkr7W58C0ACizFeh9B9xN GvAPhT4bENL1+hYqZV/yW52CThxcIyrHlH/CPTSnYbohfYlz0IIpB+Y27j1LKNgwYUCb EkmYmEBiNjlZwsrpwQ0/rrouUITzQ47BuPSTQJ/4L8GBb3qWKN7ByV+Deg3hxNSLHZKL Zrtg== X-Gm-Message-State: AOAM532LphxLLjL25VlR+bOlFUSAvHu0kdkGmdDCDEJf18F8OUvLmr03 PLEwgtVusYrEg1a7lwRBN6U= X-Google-Smtp-Source: ABdhPJwzXiBkbDOgEXtL4e7kQahZAPNu+Bn37cVpiI4YBnUMOeXd+gz4f2vQwu8bYyjlf5RtjiOpQg== X-Received: by 2002:a05:6512:689:: with SMTP id t9mr19358190lfe.388.1635201963804; Mon, 25 Oct 2021 15:46:03 -0700 (PDT) Received: from localhost.localdomain (46-138-41-28.dynamic.spd-mgts.ru. [46.138.41.28]) by smtp.gmail.com with ESMTPSA id t20sm2040956lft.240.2021.10.25.15.46.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Oct 2021 15:46:03 -0700 (PDT) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Ulf Hansson , Viresh Kumar , Stephen Boyd , Peter De Schrijver , Mikko Perttunen , Lee Jones , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Nishanth Menon , Adrian Hunter , Michael Turquette Cc: linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org, linux-pwm@vger.kernel.org, linux-mmc@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-clk@vger.kernel.org, David Heidelberg Subject: [PATCH v14 19/39] bus: tegra-gmi: Add runtime PM and OPP support Date: Tue, 26 Oct 2021 01:40:12 +0300 Message-Id: <20211025224032.21012-20-digetx@gmail.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211025224032.21012-1-digetx@gmail.com> References: <20211025224032.21012-1-digetx@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org The GMI bus on Tegra belongs to the core power domain and we're going to enable GENPD support for the core domain. Now GMI must be resumed using runtime PM API in order to initialize the GMI power state. Add runtime PM and OPP support to the GMI driver. Signed-off-by: Dmitry Osipenko --- drivers/bus/tegra-gmi.c | 53 ++++++++++++++++++++++++++++++++++++----- 1 file changed, 47 insertions(+), 6 deletions(-) diff --git a/drivers/bus/tegra-gmi.c b/drivers/bus/tegra-gmi.c index a6570789f7af..8a5b2a61c478 100644 --- a/drivers/bus/tegra-gmi.c +++ b/drivers/bus/tegra-gmi.c @@ -13,8 +13,11 @@ #include #include #include +#include #include +#include + #define TEGRA_GMI_CONFIG 0x00 #define TEGRA_GMI_CONFIG_GO BIT(31) #define TEGRA_GMI_BUS_WIDTH_32BIT BIT(30) @@ -54,9 +57,9 @@ static int tegra_gmi_enable(struct tegra_gmi *gmi) { int err; - err = clk_prepare_enable(gmi->clk); - if (err < 0) { - dev_err(gmi->dev, "failed to enable clock: %d\n", err); + err = pm_runtime_resume_and_get(gmi->dev); + if (err) { + pm_runtime_disable(gmi->dev); return err; } @@ -83,7 +86,9 @@ static void tegra_gmi_disable(struct tegra_gmi *gmi) writel(config, gmi->base + TEGRA_GMI_CONFIG); reset_control_assert(gmi->rst); - clk_disable_unprepare(gmi->clk); + + pm_runtime_put_sync_suspend(gmi->dev); + pm_runtime_force_suspend(gmi->dev); } static int tegra_gmi_parse_dt(struct tegra_gmi *gmi) @@ -213,6 +218,7 @@ static int tegra_gmi_probe(struct platform_device *pdev) if (!gmi) return -ENOMEM; + platform_set_drvdata(pdev, gmi); gmi->dev = dev; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -232,6 +238,14 @@ static int tegra_gmi_probe(struct platform_device *pdev) return PTR_ERR(gmi->rst); } + err = devm_pm_runtime_enable(gmi->dev); + if (err) + return err; + + err = devm_tegra_core_dev_init_opp_table_common(&pdev->dev); + if (err) + return err; + err = tegra_gmi_parse_dt(gmi); if (err) return err; @@ -247,8 +261,6 @@ static int tegra_gmi_probe(struct platform_device *pdev) return err; } - platform_set_drvdata(pdev, gmi); - return 0; } @@ -262,6 +274,34 @@ static int tegra_gmi_remove(struct platform_device *pdev) return 0; } +static int __maybe_unused tegra_gmi_runtime_resume(struct device *dev) +{ + struct tegra_gmi *gmi = dev_get_drvdata(dev); + int err; + + err = clk_prepare_enable(gmi->clk); + if (err < 0) { + dev_err(gmi->dev, "failed to enable clock: %d\n", err); + return err; + } + + return 0; +} + +static int __maybe_unused tegra_gmi_runtime_suspend(struct device *dev) +{ + struct tegra_gmi *gmi = dev_get_drvdata(dev); + + clk_disable_unprepare(gmi->clk); + + return 0; +} + +static const struct dev_pm_ops tegra_gmi_pm = { + SET_RUNTIME_PM_OPS(tegra_gmi_runtime_suspend, tegra_gmi_runtime_resume, + NULL) +}; + static const struct of_device_id tegra_gmi_id_table[] = { { .compatible = "nvidia,tegra20-gmi", }, { .compatible = "nvidia,tegra30-gmi", }, @@ -275,6 +315,7 @@ static struct platform_driver tegra_gmi_driver = { .driver = { .name = "tegra-gmi", .of_match_table = tegra_gmi_id_table, + .pm = &tegra_gmi_pm, }, }; module_platform_driver(tegra_gmi_driver);