Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755239Ab3IOWEf (ORCPT ); Sun, 15 Sep 2013 18:04:35 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:37541 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754756Ab3IOWEZ (ORCPT ); Sun, 15 Sep 2013 18:04:25 -0400 From: Eduardo Valentin To: , , , , , , , CC: , , , , , , Eduardo Valentin Subject: [PATCH 03/16] drivers: thermal: cpu_cooling: introduce of_cpufreq_cooling_register Date: Sun, 15 Sep 2013 18:02:30 -0400 Message-ID: <1379282563-14650-4-git-send-email-eduardo.valentin@ti.com> X-Mailer: git-send-email 1.8.2.1.342.gfa7285d In-Reply-To: <1379282563-14650-1-git-send-email-eduardo.valentin@ti.com> References: <1379282563-14650-1-git-send-email-eduardo.valentin@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4191 Lines: 130 This patch introduces an API to register cpufreq cooling device based on device tree node. The registration via device tree node differs from normal registration due to the fact that it is needed to fill the device_node structure in order to be able to match the cooling devices with trip points. Cc: Zhang Rui Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Eduardo Valentin --- drivers/thermal/Kconfig | 1 + drivers/thermal/cpu_cooling.c | 31 +++++++++++++++++++++++++++++++ include/linux/cpu_cooling.h | 25 +++++++++++++++++++++++++ 3 files changed, 57 insertions(+) diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index dd81eb8..9e7cc3f 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -91,6 +91,7 @@ config THERMAL_GOV_USER_SPACE config CPU_THERMAL bool "generic cpu cooling support" depends on CPU_FREQ + depends on THERMAL_OF select CPU_FREQ_TABLE help This implements the generic cpu cooling mechanism through frequency diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c index d179028..cd2f532 100644 --- a/drivers/thermal/cpu_cooling.c +++ b/drivers/thermal/cpu_cooling.c @@ -491,6 +491,37 @@ cpufreq_cooling_register(const struct cpumask *clip_cpus) EXPORT_SYMBOL_GPL(cpufreq_cooling_register); /** + * of_cpufreq_cooling_register - function to create cpufreq cooling device. + * @np: a valid struct device_node to the cooling device device tree node + * @clip_cpus: cpumask of cpus where the frequency constraints will happen. + * + * This interface function registers the cpufreq cooling device with the name + * "thermal-cpufreq-%x". This api can support multiple instances of cpufreq + * cooling devices. + * + * Return: a valid struct thermal_cooling_device pointer on success, + * on failure, it returns a corresponding ERR_PTR(). + */ +struct thermal_cooling_device * +of_cpufreq_cooling_register(struct device_node *np, + const struct cpumask *clip_cpus) +{ + struct thermal_cooling_device *cdev; + + if (!np) + return ERR_PTR(-EINVAL); + + cdev = cpufreq_cooling_register(clip_cpus); + if (IS_ERR(cdev)) + return cdev; + + cdev->np = np; + + return cdev; +} +EXPORT_SYMBOL_GPL(of_cpufreq_cooling_register); + +/** * cpufreq_cooling_unregister - function to remove cpufreq cooling device. * @cdev: thermal cooling device pointer. * diff --git a/include/linux/cpu_cooling.h b/include/linux/cpu_cooling.h index a5d52ee..c303d38 100644 --- a/include/linux/cpu_cooling.h +++ b/include/linux/cpu_cooling.h @@ -24,6 +24,7 @@ #ifndef __CPU_COOLING_H__ #define __CPU_COOLING_H__ +#include #include #include @@ -36,6 +37,24 @@ struct thermal_cooling_device * cpufreq_cooling_register(const struct cpumask *clip_cpus); /** + * of_cpufreq_cooling_register - create cpufreq cooling device based on DT. + * @np: a valid struct device_node to the cooling device device tree node. + * @clip_cpus: cpumask of cpus where the frequency constraints will happen + */ +#ifdef CONFIG_THERMAL_OF +struct thermal_cooling_device * +of_cpufreq_cooling_register(struct device_node *np, + const struct cpumask *clip_cpus); +#else +static inline struct thermal_cooling_device * +of_cpufreq_cooling_register(struct device_node *np, + const struct cpumask *clip_cpus) +{ + return NULL; +} +#endif + +/** * cpufreq_cooling_unregister - function to remove cpufreq cooling device. * @cdev: thermal cooling device pointer. */ @@ -48,6 +67,12 @@ cpufreq_cooling_register(const struct cpumask *clip_cpus) { return NULL; } +static inline struct thermal_cooling_device * +of_cpufreq_cooling_register(struct device_node *np, + const struct cpumask *clip_cpus) +{ + return NULL; +} static inline void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev) { -- 1.8.2.1.342.gfa7285d -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/