From patchwork Mon Jan 11 15:45:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicola Mazzucato X-Patchwork-Id: 12011019 X-Patchwork-Delegate: viresh.linux@gmail.com 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 5A42CC433E0 for ; Mon, 11 Jan 2021 15:44:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2A86B20637 for ; Mon, 11 Jan 2021 15:44:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730596AbhAKPns (ORCPT ); Mon, 11 Jan 2021 10:43:48 -0500 Received: from foss.arm.com ([217.140.110.172]:60230 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730056AbhAKPns (ORCPT ); Mon, 11 Jan 2021 10:43:48 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id ADE9511B3; Mon, 11 Jan 2021 07:43:02 -0800 (PST) Received: from ubuntu.arm.com (unknown [10.57.39.85]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 570F23F70D; Mon, 11 Jan 2021 07:43:00 -0800 (PST) From: Nicola Mazzucato To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org, sudeep.holla@arm.com, rjw@rjwysocki.net, vireshk@kernel.org, cristian.marussi@arm.com Cc: morten.rasmussen@arm.com, chris.redpath@arm.com, nicola.mazzucato@arm.com Subject: [PATCH v6 1/4] scmi-cpufreq: Remove deferred probe Date: Mon, 11 Jan 2021 15:45:21 +0000 Message-Id: <20210111154524.20196-2-nicola.mazzucato@arm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210111154524.20196-1-nicola.mazzucato@arm.com> References: <20210111154524.20196-1-nicola.mazzucato@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The current implementation still carries a case for a deferred probe, but in practise this should not happen anymore. Since the energy model expects to pass the number of OPPs, let us just move the call dev_pm_opp_get_opp_count closer to EM registration instead. Signed-off-by: Nicola Mazzucato --- drivers/cpufreq/scmi-cpufreq.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c index 491a0a24fb1e..15b213ed78fa 100644 --- a/drivers/cpufreq/scmi-cpufreq.c +++ b/drivers/cpufreq/scmi-cpufreq.c @@ -153,13 +153,6 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) return ret; } - nr_opp = dev_pm_opp_get_opp_count(cpu_dev); - if (nr_opp <= 0) { - dev_dbg(cpu_dev, "OPP table is not ready, deferring probe\n"); - ret = -EPROBE_DEFER; - goto out_free_opp; - } - priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) { ret = -ENOMEM; @@ -190,6 +183,15 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) policy->fast_switch_possible = handle->perf_ops->fast_switch_possible(handle, cpu_dev); + nr_opp = dev_pm_opp_get_opp_count(cpu_dev); + if (nr_opp <= 0) { + dev_err(cpu_dev, "%s: No OPPs for this device: %d\n", + __func__, ret); + + ret = -ENODEV; + goto out_free_priv; + } + power_scale_mw = handle->perf_ops->power_scale_mw_get(handle); em_dev_register_perf_domain(cpu_dev, nr_opp, &em_cb, policy->cpus, power_scale_mw); From patchwork Mon Jan 11 15:45:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicola Mazzucato X-Patchwork-Id: 12011021 X-Patchwork-Delegate: viresh.linux@gmail.com 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 CA8A9C433E9 for ; Mon, 11 Jan 2021 15:44:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8BA8F2065D for ; Mon, 11 Jan 2021 15:44:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732890AbhAKPnx (ORCPT ); Mon, 11 Jan 2021 10:43:53 -0500 Received: from foss.arm.com ([217.140.110.172]:60238 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732808AbhAKPnw (ORCPT ); Mon, 11 Jan 2021 10:43:52 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id A954811FB; Mon, 11 Jan 2021 07:43:06 -0800 (PST) Received: from ubuntu.arm.com (unknown [10.57.39.85]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 009DD3F70D; Mon, 11 Jan 2021 07:43:04 -0800 (PST) From: Nicola Mazzucato To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org, sudeep.holla@arm.com, rjw@rjwysocki.net, vireshk@kernel.org, cristian.marussi@arm.com Cc: morten.rasmussen@arm.com, chris.redpath@arm.com, nicola.mazzucato@arm.com Subject: [PATCH v6 2/4] scmi-cpufreq: Move CPU initialisation to probe Date: Mon, 11 Jan 2021 15:45:22 +0000 Message-Id: <20210111154524.20196-3-nicola.mazzucato@arm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210111154524.20196-1-nicola.mazzucato@arm.com> References: <20210111154524.20196-1-nicola.mazzucato@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Some of the cpu related initialisation can be done at probe stage. This patch moves those initialisations from the ->init callback to the probe stage. This is done in preparation for adding support to retrieve additional information from DT (CPUs sharing v/f lines). Signed-off-by: Nicola Mazzucato --- drivers/cpufreq/scmi-cpufreq.c | 180 ++++++++++++++++++++++++--------- 1 file changed, 135 insertions(+), 45 deletions(-) diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c index 15b213ed78fa..4aa97cdc5997 100644 --- a/drivers/cpufreq/scmi-cpufreq.c +++ b/drivers/cpufreq/scmi-cpufreq.c @@ -25,6 +25,14 @@ struct scmi_data { struct device *cpu_dev; }; +/* Per-CPU storage for runtime management */ +struct scmi_cpudata { + cpumask_var_t scmi_shared_cpus; + struct cpufreq_frequency_table *freq_table; +}; + +static struct scmi_cpudata *cpudata_table; + static const struct scmi_handle *handle; static unsigned int scmi_cpufreq_get_rate(unsigned int cpu) @@ -120,13 +128,10 @@ scmi_get_cpu_power(unsigned long *power, unsigned long *KHz, static int scmi_cpufreq_init(struct cpufreq_policy *policy) { - int ret, nr_opp; + int ret; unsigned int latency; struct device *cpu_dev; struct scmi_data *priv; - struct cpufreq_frequency_table *freq_table; - struct em_data_callback em_cb = EM_DATA_CB(scmi_get_cpu_power); - bool power_scale_mw; cpu_dev = get_cpu_device(policy->cpu); if (!cpu_dev) { @@ -134,42 +139,19 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) return -ENODEV; } - ret = handle->perf_ops->device_opps_add(handle, cpu_dev); - if (ret) { - dev_warn(cpu_dev, "failed to add opps to the device\n"); - return ret; - } - - ret = scmi_get_sharing_cpus(cpu_dev, policy->cpus); - if (ret) { - dev_warn(cpu_dev, "failed to get sharing cpumask\n"); - return ret; - } - - ret = dev_pm_opp_set_sharing_cpus(cpu_dev, policy->cpus); - if (ret) { - dev_err(cpu_dev, "%s: failed to mark OPPs as shared: %d\n", - __func__, ret); - return ret; - } - priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) { ret = -ENOMEM; goto out_free_opp; } - ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table); - if (ret) { - dev_err(cpu_dev, "failed to init cpufreq table: %d\n", ret); - goto out_free_priv; - } + cpumask_copy(policy->cpus, cpudata_table[policy->cpu].scmi_shared_cpus); priv->cpu_dev = cpu_dev; priv->domain_id = handle->perf_ops->device_domain_id(cpu_dev); policy->driver_data = priv; - policy->freq_table = freq_table; + policy->freq_table = cpudata_table[policy->cpu].freq_table; /* SCMI allows DVFS request for any domain from any CPU */ policy->dvfs_possible_from_any_cpu = true; @@ -183,23 +165,8 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) policy->fast_switch_possible = handle->perf_ops->fast_switch_possible(handle, cpu_dev); - nr_opp = dev_pm_opp_get_opp_count(cpu_dev); - if (nr_opp <= 0) { - dev_err(cpu_dev, "%s: No OPPs for this device: %d\n", - __func__, ret); - - ret = -ENODEV; - goto out_free_priv; - } - - power_scale_mw = handle->perf_ops->power_scale_mw_get(handle); - em_dev_register_perf_domain(cpu_dev, nr_opp, &em_cb, policy->cpus, - power_scale_mw); - return 0; -out_free_priv: - kfree(priv); out_free_opp: dev_pm_opp_remove_all_dynamic(cpu_dev); @@ -210,7 +177,6 @@ static int scmi_cpufreq_exit(struct cpufreq_policy *policy) { struct scmi_data *priv = policy->driver_data; - dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &policy->freq_table); dev_pm_opp_remove_all_dynamic(priv->cpu_dev); kfree(priv); @@ -231,10 +197,102 @@ static struct cpufreq_driver scmi_cpufreq_driver = { .exit = scmi_cpufreq_exit, }; +static int scmi_init_cpudata(void) +{ + int cpu; + unsigned int ncpus = num_possible_cpus(); + + cpudata_table = kzalloc(sizeof(*cpudata_table) * ncpus, GFP_KERNEL); + if (!cpudata_table) + return -ENOMEM; + + for_each_possible_cpu(cpu) { + if (!zalloc_cpumask_var(&cpudata_table[cpu].scmi_shared_cpus, + GFP_KERNEL)) + goto out; + } + + return 0; + +out: + kfree(cpudata_table); + return -ENOMEM; +} + +static int scmi_init_device(const struct scmi_handle *handle, int cpu) +{ + struct device *cpu_dev; + int ret, nr_opp; + struct em_data_callback em_cb = EM_DATA_CB(scmi_get_cpu_power); + bool power_scale_mw; + cpumask_var_t scmi_cpus; + + if (!zalloc_cpumask_var(&scmi_cpus, GFP_KERNEL)) + return -ENOMEM; + + cpumask_set_cpu(cpu, scmi_cpus); + + cpu_dev = get_cpu_device(cpu); + + ret = scmi_get_sharing_cpus(cpu_dev, scmi_cpus); + if (ret) { + dev_warn(cpu_dev, "failed to get sharing cpumask\n"); + goto free_cpumask; + } + + /* + * We get here for each CPU. Add OPPs only on those CPUs for which we + * haven't already done so, or set their OPPs as shared. + */ + nr_opp = dev_pm_opp_get_opp_count(cpu_dev); + if (nr_opp <= 0) { + ret = handle->perf_ops->device_opps_add(handle, cpu_dev); + if (ret) { + dev_warn(cpu_dev, "failed to add opps to the device\n"); + goto free_cpumask; + } + + ret = dev_pm_opp_set_sharing_cpus(cpu_dev, scmi_cpus); + if (ret) { + dev_err(cpu_dev, "%s: failed to mark OPPs as shared: %d\n", + __func__, ret); + goto free_cpumask; + } + + nr_opp = dev_pm_opp_get_opp_count(cpu_dev); + if (nr_opp <= 0) { + dev_err(cpu_dev, "%s: No OPPs for this device: %d\n", + __func__, ret); + + ret = -ENODEV; + goto free_cpumask; + } + + power_scale_mw = handle->perf_ops->power_scale_mw_get(handle); + em_dev_register_perf_domain(cpu_dev, nr_opp, &em_cb, scmi_cpus, + power_scale_mw); + } + + ret = dev_pm_opp_init_cpufreq_table(cpu_dev, + &cpudata_table[cpu].freq_table); + if (ret) { + dev_err(cpu_dev, "failed to init cpufreq table: %d\n", ret); + goto free_cpumask; + } + + cpumask_copy(cpudata_table[cpu].scmi_shared_cpus, scmi_cpus); + +free_cpumask: + free_cpumask_var(scmi_cpus); + return ret; +} + static int scmi_cpufreq_probe(struct scmi_device *sdev) { int ret; struct device *dev = &sdev->dev; + int cpu; + struct device *cpu_dev; handle = sdev->handle; @@ -247,6 +305,24 @@ static int scmi_cpufreq_probe(struct scmi_device *sdev) devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, NULL); #endif + ret = scmi_init_cpudata(); + if (ret) { + pr_err("%s: init cpu data failed\n", __func__); + return ret; + } + + for_each_possible_cpu(cpu) { + cpu_dev = get_cpu_device(cpu); + + ret = scmi_init_device(handle, cpu); + if (ret) { + dev_err(cpu_dev, "%s: init device failed\n", + __func__); + + return ret; + } + } + ret = cpufreq_register_driver(&scmi_cpufreq_driver); if (ret) { dev_err(dev, "%s: registering cpufreq failed, err: %d\n", @@ -258,6 +334,20 @@ static int scmi_cpufreq_probe(struct scmi_device *sdev) static void scmi_cpufreq_remove(struct scmi_device *sdev) { + int cpu; + struct device *cpu_dev; + + for_each_possible_cpu(cpu) { + cpu_dev = get_cpu_device(cpu); + + dev_pm_opp_free_cpufreq_table(cpu_dev, + &cpudata_table[cpu].freq_table); + + free_cpumask_var(cpudata_table[cpu].scmi_shared_cpus); + } + + kfree(cpudata_table); + cpufreq_unregister_driver(&scmi_cpufreq_driver); } From patchwork Mon Jan 11 15:45:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicola Mazzucato X-Patchwork-Id: 12011025 X-Patchwork-Delegate: viresh.linux@gmail.com 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 2C5D6C4332D for ; Mon, 11 Jan 2021 15:44:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EBDC82065D for ; Mon, 11 Jan 2021 15:44:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728810AbhAKPn5 (ORCPT ); Mon, 11 Jan 2021 10:43:57 -0500 Received: from foss.arm.com ([217.140.110.172]:60250 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730360AbhAKPn4 (ORCPT ); Mon, 11 Jan 2021 10:43:56 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 89AB112FC; Mon, 11 Jan 2021 07:43:10 -0800 (PST) Received: from ubuntu.arm.com (unknown [10.57.39.85]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id AB1793F70D; Mon, 11 Jan 2021 07:43:08 -0800 (PST) From: Nicola Mazzucato To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org, sudeep.holla@arm.com, rjw@rjwysocki.net, vireshk@kernel.org, cristian.marussi@arm.com Cc: morten.rasmussen@arm.com, chris.redpath@arm.com, nicola.mazzucato@arm.com Subject: [PATCH v6 3/4] scmi-cpufreq: Get opp_shared_cpus from opp-v2 for EM Date: Mon, 11 Jan 2021 15:45:23 +0000 Message-Id: <20210111154524.20196-4-nicola.mazzucato@arm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210111154524.20196-1-nicola.mazzucato@arm.com> References: <20210111154524.20196-1-nicola.mazzucato@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org By design, SCMI performance domains define the granularity of performance controls, they do not describe any underlying hardware dependencies (although they may match in many cases). It is therefore possible to have some platforms where hardware may have the ability to control CPU performance at different granularity and choose to describe fine-grained performance control through SCMI. In such situations, the energy model would be provided with inaccurate information based on controls, while it still needs to know the performance boundaries. To restore correct functionality, retrieve information of CPUs under the same performance domain from operating-points-v2 in DT, and pass it on to EM. Signed-off-by: Nicola Mazzucato --- drivers/cpufreq/scmi-cpufreq.c | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c index 4aa97cdc5997..ff6ba6fab58b 100644 --- a/drivers/cpufreq/scmi-cpufreq.c +++ b/drivers/cpufreq/scmi-cpufreq.c @@ -226,9 +226,12 @@ static int scmi_init_device(const struct scmi_handle *handle, int cpu) struct em_data_callback em_cb = EM_DATA_CB(scmi_get_cpu_power); bool power_scale_mw; cpumask_var_t scmi_cpus; + cpumask_var_t opp_shared_cpus; if (!zalloc_cpumask_var(&scmi_cpus, GFP_KERNEL)) return -ENOMEM; + if (!zalloc_cpumask_var(&opp_shared_cpus, GFP_KERNEL)) + return -ENOMEM; cpumask_set_cpu(cpu, scmi_cpus); @@ -240,6 +243,20 @@ static int scmi_init_device(const struct scmi_handle *handle, int cpu) goto free_cpumask; } + /* + * The OPP 'sharing cpus' info may come from dt through an empty opp + * table and opp-shared. If found, it takes precedence over the SCMI + * domain IDs info. + */ + ret = dev_pm_opp_of_get_sharing_cpus(cpu_dev, opp_shared_cpus); + if (ret || !cpumask_weight(opp_shared_cpus)) { + /* + * Either opp-table is not set or no opp-shared was found, + * use the information from SCMI domain IDs. + */ + cpumask_copy(opp_shared_cpus, scmi_cpus); + } + /* * We get here for each CPU. Add OPPs only on those CPUs for which we * haven't already done so, or set their OPPs as shared. @@ -252,7 +269,7 @@ static int scmi_init_device(const struct scmi_handle *handle, int cpu) goto free_cpumask; } - ret = dev_pm_opp_set_sharing_cpus(cpu_dev, scmi_cpus); + ret = dev_pm_opp_set_sharing_cpus(cpu_dev, opp_shared_cpus); if (ret) { dev_err(cpu_dev, "%s: failed to mark OPPs as shared: %d\n", __func__, ret); @@ -269,7 +286,7 @@ static int scmi_init_device(const struct scmi_handle *handle, int cpu) } power_scale_mw = handle->perf_ops->power_scale_mw_get(handle); - em_dev_register_perf_domain(cpu_dev, nr_opp, &em_cb, scmi_cpus, + em_dev_register_perf_domain(cpu_dev, nr_opp, &em_cb, opp_shared_cpus, power_scale_mw); } @@ -284,6 +301,7 @@ static int scmi_init_device(const struct scmi_handle *handle, int cpu) free_cpumask: free_cpumask_var(scmi_cpus); + free_cpumask_var(opp_shared_cpus); return ret; } From patchwork Mon Jan 11 15:45:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicola Mazzucato X-Patchwork-Id: 12011023 X-Patchwork-Delegate: viresh.linux@gmail.com 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 65F57C43332 for ; Mon, 11 Jan 2021 15:44:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 34072207B1 for ; Mon, 11 Jan 2021 15:44:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733214AbhAKPoC (ORCPT ); Mon, 11 Jan 2021 10:44:02 -0500 Received: from foss.arm.com ([217.140.110.172]:60260 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730360AbhAKPoB (ORCPT ); Mon, 11 Jan 2021 10:44:01 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 3625D1396; Mon, 11 Jan 2021 07:43:16 -0800 (PST) Received: from ubuntu.arm.com (unknown [10.57.39.85]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id D264B3F70D; Mon, 11 Jan 2021 07:43:13 -0800 (PST) From: Nicola Mazzucato To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org, sudeep.holla@arm.com, rjw@rjwysocki.net, vireshk@kernel.org, cristian.marussi@arm.com Cc: morten.rasmussen@arm.com, chris.redpath@arm.com, nicola.mazzucato@arm.com Subject: [PATCH v6 4/4] cpufreq: blacklist Arm Vexpress platforms in cpufreq-dt-platdev Date: Mon, 11 Jan 2021 15:45:24 +0000 Message-Id: <20210111154524.20196-5-nicola.mazzucato@arm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210111154524.20196-1-nicola.mazzucato@arm.com> References: <20210111154524.20196-1-nicola.mazzucato@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Sudeep Holla Add "arm,vexpress" to cpufreq-dt-platdev blacklist since the actual scaling is handled by the firmware cpufreq drivers(scpi, scmi and vexpress-spc). Signed-off-by: Sudeep Holla --- drivers/cpufreq/cpufreq-dt-platdev.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c index bd2db0188cbb..91e6a0c10dbf 100644 --- a/drivers/cpufreq/cpufreq-dt-platdev.c +++ b/drivers/cpufreq/cpufreq-dt-platdev.c @@ -103,6 +103,8 @@ static const struct of_device_id whitelist[] __initconst = { static const struct of_device_id blacklist[] __initconst = { { .compatible = "allwinner,sun50i-h6", }, + { .compatible = "arm,vexpress", }, + { .compatible = "calxeda,highbank", }, { .compatible = "calxeda,ecx-2000", },