diff options
| author | Anson Huang <Anson.Huang@nxp.com> | 2017-09-05 17:31:43 +0800 |
|---|---|---|
| committer | Leonard Crestez <leonard.crestez@nxp.com> | 2018-08-24 12:41:33 +0300 |
| commit | 7a520a3edbcd7e66d5b23cc8cb87787433f51549 (patch) | |
| tree | f891627d4a43f5e6fa645b3bff5c638a4ab78219 /drivers/cpufreq | |
| parent | fadf18e68adede83863217949ff9780bc3cb59a1 (diff) | |
MLK-16372-2 cpufreq: imx8: add cpu-freq cooling support
Register cpu-freq cooling device if device tree
supports cooling-cells, different cluster can
have its own cooling device settings.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/imx8-cpufreq.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/cpufreq/imx8-cpufreq.c b/drivers/cpufreq/imx8-cpufreq.c index 5a45b7dd6e84..10b664cdbbe4 100644 --- a/drivers/cpufreq/imx8-cpufreq.c +++ b/drivers/cpufreq/imx8-cpufreq.c @@ -10,6 +10,7 @@ #include <linux/clk.h> #include <linux/cpu.h> #include <linux/cpufreq.h> +#include <linux/cpu_cooling.h> #include <linux/err.h> #include <linux/module.h> #include <linux/of.h> @@ -30,6 +31,7 @@ struct imx8_cpufreq cluster_freq[MAX_CLUSTER_NUM]; static struct cpufreq_frequency_table *freq_table[MAX_CLUSTER_NUM]; static unsigned int transition_latency[MAX_CLUSTER_NUM]; struct device *cpu_dev; +static struct thermal_cooling_device *cdev[2]; static int imx8_set_target(struct cpufreq_policy *policy, unsigned int index) { @@ -90,6 +92,26 @@ static int imx8_cpufreq_init(struct cpufreq_policy *policy) return ret; } +static void imx8_cpufreq_ready(struct cpufreq_policy *policy) +{ + struct device_node *np = of_get_cpu_node(policy->cpu, NULL); + unsigned int cluster_id = topology_physical_package_id(policy->cpu); + + if (of_find_property(np, "#cooling-cells", NULL)) { + cdev[cluster_id] = of_cpufreq_cooling_register(np, + policy->related_cpus); + + if (IS_ERR(cdev[cluster_id]) && PTR_ERR(cdev[cluster_id]) != -ENOSYS) { + pr_err("cpu%d is not running as cooling device: %ld\n", + policy->cpu, PTR_ERR(cdev[cluster_id])); + + cdev[cluster_id] = NULL; + } + } + + of_node_put(np); +} + static struct cpufreq_driver imx8_cpufreq_driver = { .flags = CPUFREQ_NEED_INITIAL_FREQ_CHECK, .verify = cpufreq_generic_frequency_table_verify, @@ -98,6 +120,7 @@ static struct cpufreq_driver imx8_cpufreq_driver = { .init = imx8_cpufreq_init, .name = "imx8-cpufreq", .attr = cpufreq_generic_attr, + .ready = imx8_cpufreq_ready, #ifdef CONFIG_PM .suspend = cpufreq_generic_suspend, #endif |