diff options
Diffstat (limited to 'drivers/cpufreq/exynos-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/exynos-cpufreq.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c index f99a0b0b7c06..5e98c6b1f284 100644 --- a/drivers/cpufreq/exynos-cpufreq.c +++ b/drivers/cpufreq/exynos-cpufreq.c @@ -18,10 +18,13 @@ #include <linux/cpufreq.h> #include <linux/platform_device.h> #include <linux/of.h> +#include <linux/cpu_cooling.h> +#include <linux/cpu.h> #include "exynos-cpufreq.h" static struct exynos_dvfs_info *exynos_info; +static struct thermal_cooling_device *cdev; static struct regulator *arm_regulator; static unsigned int locking_frequency; @@ -156,6 +159,7 @@ static struct cpufreq_driver exynos_driver = { static int exynos_cpufreq_probe(struct platform_device *pdev) { + struct device_node *cpus, *np; int ret = -EINVAL; exynos_info = kzalloc(sizeof(*exynos_info), GFP_KERNEL); @@ -198,9 +202,36 @@ static int exynos_cpufreq_probe(struct platform_device *pdev) /* Done here as we want to capture boot frequency */ locking_frequency = clk_get_rate(exynos_info->cpu_clk) / 1000; - if (!cpufreq_register_driver(&exynos_driver)) + ret = cpufreq_register_driver(&exynos_driver); + if (ret) + goto err_cpufreq_reg; + + cpus = of_find_node_by_path("/cpus"); + if (!cpus) { + pr_err("failed to find cpus 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, + 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; +err_cpufreq_reg: dev_err(&pdev->dev, "failed to register cpufreq driver\n"); regulator_put(arm_regulator); err_vdd_arm: |