From mboxrd@z Thu Jan 1 00:00:00 1970 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=-16.6 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,T_DKIMWL_WL_MED,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=ham 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 45446C468C1 for ; Sat, 8 Jun 2019 04:44:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1AAB320840 for ; Sat, 8 Jun 2019 04:44:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="cHfi3CnT" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730533AbfFHEoB (ORCPT ); Sat, 8 Jun 2019 00:44:01 -0400 Received: from mail-qk1-f202.google.com ([209.85.222.202]:34332 "EHLO mail-qk1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730471AbfFHEn7 (ORCPT ); Sat, 8 Jun 2019 00:43:59 -0400 Received: by mail-qk1-f202.google.com with SMTP id h198so3411702qke.1 for ; Fri, 07 Jun 2019 21:43:58 -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=AQaL/PGq4V0DuXs35/Wx+s7nNXc5+qEy/Os9W/iGFYA=; b=cHfi3CnTUcT1n2hmhkaz7Mg9O1ojtQBcEgDon17GIJ7rAI2DCEokMLnia6lX2ELmA1 xmRYRLLSFDWkW4AbAza2SAuDM8uNw1ML5WBrgCxz53AKgWu/5e+V67Og3J/KXliXlq9P viieHIuJgf2Q43PHgfe3i6Fb5VuUmOFwzOVJbWLcZiEPXqpJUgqbbHKzcs6gTTSDnHAI SQog4t282FQWBS+PPYN8Lem/9034ox8YIearSEgBN8nVVXVXuApsd3tOcr/HXp73U9Fh yLdkzE4F2D7baTtK4XvCFfhGbigKyDViR63AutM8OLXSitJshAKEhifKe4m0FQgJm7Xu ujpQ== 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=AQaL/PGq4V0DuXs35/Wx+s7nNXc5+qEy/Os9W/iGFYA=; b=e/80DUwFKBlOSX6yPDqBvmOrsbldg6WNZGHzSuN3IUIbK5lyP00t90sa0Cn5OU4e6a s2bBpnEDKi5tpnxUs02pJ/CfEtdZDXf9XpEzQoF8w54HmQJ/wsILW/vAljpUCyuDrUjU uRIstUXXmg8x9GhC47cvlENaB2nJ3S2SlcEtiCaaqsRcAUex50jb7IRQHZl6m/V5VyIx n+oqfKOuKj85zx7i7ST2OO4lC3toml8WF11hdr4jIODBFoGdDzKbUDjewZT8c2cFJsuW kJy0vY7TWE40zLevdSBgtHm89lxJrYqyKW+MpnHYfjb2UfURqW+dPBPwl7fHbJ0UcwuX sCHg== X-Gm-Message-State: APjAAAV+9RGH356f/LehLKsB3EfSZRXPVUcPhB8k5+qKM+y5IJ+QKwnX 9NvnqZkZd2xCw1N3Bs3PaY6yKnMfUlID508= X-Google-Smtp-Source: APXvYqzDiL0bLzrWM4BPLbZ4rXoIgduk46Uiyp6JQp8vO+GfSBOMdB0GFp36bFyZrGIsx1NIsnvnzMRXmsbPiuI= X-Received: by 2002:a0c:d047:: with SMTP id d7mr45723029qvh.64.1559969038459; Fri, 07 Jun 2019 21:43:58 -0700 (PDT) Date: Fri, 7 Jun 2019 21:43:34 -0700 In-Reply-To: <20190608044339.115026-1-saravanak@google.com> Message-Id: <20190608044339.115026-5-saravanak@google.com> Mime-Version: 1.0 References: <20190608044339.115026-1-saravanak@google.com> X-Mailer: git-send-email 2.22.0.rc2.383.gf4fbbf30c2-goog Subject: [PATCH v1 4/9] OPP: Add API to find an OPP table from its DT node From: Saravana Kannan To: Georgi Djakov , Rob Herring , Mark Rutland , Viresh Kumar , Nishanth Menon , Stephen Boyd , "Rafael J. Wysocki" 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 Content-Type: text/plain; charset="UTF-8" Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org This allows finding a device's OPP table (when it has multiple) from a phandle to the OPP table in DT. Signed-off-by: Saravana Kannan --- drivers/opp/of.c | 42 ++++++++++++++++++++++++++++++++++-------- include/linux/pm_opp.h | 7 +++++++ 2 files changed, 41 insertions(+), 8 deletions(-) diff --git a/drivers/opp/of.c b/drivers/opp/of.c index 54fa70ed2adc..34c51905f56d 100644 --- a/drivers/opp/of.c +++ b/drivers/opp/of.c @@ -42,14 +42,9 @@ struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev) } EXPORT_SYMBOL_GPL(dev_pm_opp_of_get_opp_desc_node); -struct opp_table *_managed_opp(struct device *dev, int index) +struct opp_table *_find_opp_table_from_node(struct device_node *np) { struct opp_table *opp_table, *managed_table = NULL; - struct device_node *np; - - np = _opp_of_get_opp_desc_node(dev->of_node, index); - if (!np) - return NULL; list_for_each_entry(opp_table, &opp_tables, node) { if (opp_table->np == np) { @@ -69,11 +64,42 @@ struct opp_table *_managed_opp(struct device *dev, int index) } } - of_node_put(np); - return managed_table; } +/** + * dev_pm_opp_of_find_table_from_node() - Find OPP table from its DT node + * @np: DT node used for finding the OPP table + * + * Return: OPP table corresponding to the DT node, else NULL on failure. + * + * The caller needs to put the node with of_node_put() after using it. + */ +struct opp_table *dev_pm_opp_of_find_table_from_node(struct device_node *np) +{ + struct opp_table *opp_table; + + mutex_lock(&opp_table_lock); + opp_table = _find_opp_table_from_node(np); + mutex_unlock(&opp_table_lock); + return opp_table; +} +EXPORT_SYMBOL_GPL(dev_pm_opp_of_find_table_from_node); + +struct opp_table *_managed_opp(struct device *dev, int index) +{ + struct device_node *np; + struct opp_table *opp_table; + + np = _opp_of_get_opp_desc_node(dev->of_node, index); + if (!np) + return NULL; + + opp_table = _find_opp_table_from_node(np); + of_node_put(np); + return opp_table; +} + /* The caller must call dev_pm_opp_put() after the OPP is used */ static struct dev_pm_opp *_find_opp_of_np(struct opp_table *opp_table, struct device_node *opp_np) diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h index 7f040cc20daf..3f30ce55e8eb 100644 --- a/include/linux/pm_opp.h +++ b/include/linux/pm_opp.h @@ -359,6 +359,7 @@ int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask); void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask); int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask); struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev); +struct opp_table *dev_pm_opp_of_find_table_from_node(struct device_node *np); struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp); int of_get_required_opp_performance_state(struct device_node *np, int index); void dev_pm_opp_of_register_em(struct cpumask *cpus); @@ -396,6 +397,12 @@ static inline struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device return NULL; } +static inline struct opp_table *dev_pm_opp_of_find_table_from_node( + struct device_node *np) +{ + return NULL; +} + static inline struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp) { return NULL; -- 2.22.0.rc2.383.gf4fbbf30c2-goog