From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lukasz Majewski Subject: [PATCH v2] cpufreq: exynos: Use simple approach to asses if cpu cooling can be used Date: Thu, 05 Feb 2015 16:54:49 +0100 Message-ID: <1423151689-27490-1-git-send-email-l.majewski@samsung.com> References: <20150204100025.565ee2b0@amdc2363> Return-path: Received: from mailout3.samsung.com ([203.254.224.33]:55471 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753331AbbBEPzH (ORCPT ); Thu, 5 Feb 2015 10:55:07 -0500 In-reply-to: <20150204100025.565ee2b0@amdc2363> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Eduardo Valentin , Zhang Rui Cc: Linux PM list , "linux-samsung-soc@vger.kernel.org" , Bartlomiej Zolnierkiewicz , Lukasz Majewski , Amit Daniel Kachhap , Abhilash Kesavan , Abhilash Kesavan , Chanwoo Choi , Viresh Kumar , Lukasz Majewski Commit: e725d26c4857e5e41975b5e74e64ce6ab09a7121 provided possibility to use device tree to asses if cpu can be used as cooling device. Since the code was somewhat awkward, simpler approach has been proposed. Test HW: Exynos 4412 - Odroid U3. Suggested-by: Viresh Kumar Signed-off-by: Lukasz Majewski Acked-by: Viresh Kumar --- Changes for v2: - Remove superfluous *np pointer --- drivers/cpufreq/exynos-cpufreq.c | 21 ++++++--------------- 1 file changed, 6 insertions(+), 15 deletions(-) diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c index 5e98c6b..82d2fbb 100644 --- a/drivers/cpufreq/exynos-cpufreq.c +++ b/drivers/cpufreq/exynos-cpufreq.c @@ -159,7 +159,7 @@ static struct cpufreq_driver exynos_driver = { static int exynos_cpufreq_probe(struct platform_device *pdev) { - struct device_node *cpus, *np; + struct device_node *cpu0; int ret = -EINVAL; exynos_info = kzalloc(sizeof(*exynos_info), GFP_KERNEL); @@ -206,28 +206,19 @@ static int exynos_cpufreq_probe(struct platform_device *pdev) if (ret) goto err_cpufreq_reg; - cpus = of_find_node_by_path("/cpus"); - if (!cpus) { - pr_err("failed to find cpus node\n"); + cpu0 = of_get_cpu_node(0, NULL); + if (!cpu0) { + pr_err("failed to find cpu0 node\n"); return 0; } - np = of_get_next_child(cpus, NULL); - if (!np) { - pr_err("failed to find cpus child node\n"); - of_node_put(cpus); - return 0; - } - - if (of_find_property(np, "#cooling-cells", NULL)) { - cdev = of_cpufreq_cooling_register(np, + if (of_find_property(cpu0, "#cooling-cells", NULL)) { + cdev = of_cpufreq_cooling_register(cpu0, cpu_present_mask); if (IS_ERR(cdev)) pr_err("running cpufreq without cooling device: %ld\n", PTR_ERR(cdev)); } - of_node_put(np); - of_node_put(cpus); return 0; -- 2.0.0.rc2