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authorLukasz Majewski <l.majewski@samsung.com>2015-02-05 18:45:06 +0300
committerLukasz Majewski <l.majewski@samsung.com>2015-03-02 12:04:52 +0300
commit0fc83929d03c2e16cbcf6cf944bd5df8d829847f (patch)
tree7a5a1d93e6e806eae2b17840ad6c00bfed539ffb /drivers
parent42b696e808bbea3a4ebf8029e1965d2314612402 (diff)
downloadlinux-0fc83929d03c2e16cbcf6cf944bd5df8d829847f.tar.xz
cpufreq: exynos: Use simple approach to asses if cpu cooling can be used
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 <viresh.kumar@linaro.org> Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/cpufreq/exynos-cpufreq.c21
1 files changed, 6 insertions, 15 deletions
diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c
index 5e98c6b1f284..82d2fbb20f7e 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;