From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Abraham Subject: [PATCH v2 1/2] PM / OPP: Allow boost frequency to be looked up from device tree Date: Fri, 7 Feb 2014 20:49:01 +0530 Message-ID: <1391786342-11812-2-git-send-email-thomas.ab@samsung.com> References: <1391786342-11812-1-git-send-email-thomas.ab@samsung.com> Return-path: Received: from mail-pa0-f53.google.com ([209.85.220.53]:63375 "EHLO mail-pa0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752629AbaBGPTa (ORCPT ); Fri, 7 Feb 2014 10:19:30 -0500 In-Reply-To: <1391786342-11812-1-git-send-email-thomas.ab@samsung.com> Sender: linux-samsung-soc-owner@vger.kernel.org List-Id: linux-samsung-soc@vger.kernel.org To: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: rjw@rjwysocki.net, linux-samsung-soc@vger.kernel.org, kgene.kim@samsung.com, t.figa@samsung.com, l.majewski@samsung.com, viresh.kumar@linaro.org, thomas.ab@samsung.com, Nishanth Menon From: Thomas Abraham Commit 6f19efc0 ("cpufreq: Add boost frequency support in core") adds support for CPU boost mode. This patch adds support for finding available boost frequencies from device tree and marking them as usable in boost mode. Cc: Nishanth Menon Cc: Lukasz Majewski Signed-off-by: Thomas Abraham --- drivers/base/power/opp.c | 34 +++++++++++++++++++++++++++++++++- 1 file changed, 33 insertions(+), 1 deletion(-) diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c index fa41874..b636826 100644 --- a/drivers/base/power/opp.c +++ b/drivers/base/power/opp.c @@ -628,7 +628,8 @@ int dev_pm_opp_init_cpufreq_table(struct device *dev, struct device_opp *dev_opp; struct dev_pm_opp *opp; struct cpufreq_frequency_table *freq_table; - int i = 0; + int i = 0, j, len, ret; + u32 *boost_freqs = NULL; /* Pretend as if I am an updater */ mutex_lock(&dev_opp_list_lock); @@ -650,10 +651,35 @@ int dev_pm_opp_init_cpufreq_table(struct device *dev, return -ENOMEM; } + if (of_find_property(dev->of_node, "boost-frequency", &len)) { + if (len == 0 || (len & (sizeof(u32) - 1)) != 0) { + dev_err(dev, "%s: invalid boost frequency\n", __func__); + ret = -EINVAL; + goto err_boost; + } + + boost_freqs = kzalloc(len, GFP_KERNEL); + if (!boost_freqs) { + dev_warn(dev, "%s: no memory for boost freq table\n", + __func__); + ret = -ENOMEM; + goto err_boost; + } + of_property_read_u32_array(dev->of_node, "boost-frequency", + boost_freqs, len / sizeof(u32)); + } + list_for_each_entry(opp, &dev_opp->opp_list, node) { if (opp->available) { freq_table[i].driver_data = i; freq_table[i].frequency = opp->rate / 1000; + for (j = 0; j < len / sizeof(u32) && boost_freqs; j++) { + if (boost_freqs[j] == freq_table[i].frequency) { + freq_table[i].driver_data = + CPUFREQ_BOOST_FREQ; + break; + } + } i++; } } @@ -663,8 +689,14 @@ int dev_pm_opp_init_cpufreq_table(struct device *dev, freq_table[i].frequency = CPUFREQ_TABLE_END; *table = &freq_table[0]; + kfree(boost_freqs); return 0; + +err_boost: + kfree(freq_table); + mutex_unlock(&dev_opp_list_lock); + return ret; } EXPORT_SYMBOL_GPL(dev_pm_opp_init_cpufreq_table); -- 1.7.10.4