From mboxrd@z Thu Jan 1 00:00:00 1970 From: Antti P Miettinen Subject: [PATCH v2 2/8] PM QoS: Add CPU frequency minimum as PM QoS param Date: Mon, 16 Jan 2012 08:59:55 +0200 Message-ID: <1326697201-32406-3-git-send-email-amiettinen@nvidia.com> References: <1326697201-32406-1-git-send-email-amiettinen@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1326697201-32406-1-git-send-email-amiettinen@nvidia.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces@lists.linux-foundation.org Errors-To: linux-pm-bounces@lists.linux-foundation.org To: linux-pm@lists.linux-foundation.org List-Id: linux-pm@vger.kernel.org Add minimum CPU frequency as PM QoS parameter. Signed-off-by: Antti P Miettinen --- include/linux/pm_qos.h | 3 +++ kernel/power/qos.c | 17 ++++++++++++++++- 2 files changed, 19 insertions(+), 1 deletions(-) diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h index 5ac91d8..54a0d00 100644 --- a/include/linux/pm_qos.h +++ b/include/linux/pm_qos.h @@ -14,8 +14,10 @@ enum { PM_QOS_CPU_DMA_LATENCY, PM_QOS_NETWORK_LATENCY, PM_QOS_NETWORK_THROUGHPUT, + PM_QOS_CPU_FREQ_MIN, /* insert new class ID */ + PM_QOS_NUM_CLASSES, }; @@ -25,6 +27,7 @@ enum { #define PM_QOS_NETWORK_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC) #define PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE 0 #define PM_QOS_DEV_LAT_DEFAULT_VALUE 0 +#define PM_QOS_CPU_FREQ_MIN_DEFAULT_VALUE 0 struct pm_qos_request { struct plist_node node; diff --git a/kernel/power/qos.c b/kernel/power/qos.c index d6d6dbd..07d761a 100644 --- a/kernel/power/qos.c +++ b/kernel/power/qos.c @@ -101,11 +101,26 @@ static struct pm_qos_object network_throughput_pm_qos = { }; +static BLOCKING_NOTIFIER_HEAD(cpu_freq_min_notifier); +static struct pm_qos_constraints cpu_freq_min_constraints = { + .list = PLIST_HEAD_INIT(cpu_freq_min_constraints.list), + .target_value = PM_QOS_CPU_FREQ_MIN_DEFAULT_VALUE, + .default_value = PM_QOS_CPU_FREQ_MIN_DEFAULT_VALUE, + .type = PM_QOS_MAX, + .notifiers = &cpu_freq_min_notifier, +}; +static struct pm_qos_object cpu_freq_min_pm_qos = { + .constraints = &cpu_freq_min_constraints, + .name = "cpu_freq_min", +}; + + static struct pm_qos_object *pm_qos_array[] = { &null_pm_qos, &cpu_dma_pm_qos, &network_lat_pm_qos, - &network_throughput_pm_qos + &network_throughput_pm_qos, + &cpu_freq_min_pm_qos, }; static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf, -- 1.7.4.1