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path: root/drivers/cpufreq/cpufreq-cpu0.c
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Diffstat (limited to 'drivers/cpufreq/cpufreq-cpu0.c')
-rw-r--r--drivers/cpufreq/cpufreq-cpu0.c27
1 files changed, 20 insertions, 7 deletions
diff --git a/drivers/cpufreq/cpufreq-cpu0.c b/drivers/cpufreq/cpufreq-cpu0.c
index 3ab8294eab04..a64eb8b70444 100644
--- a/drivers/cpufreq/cpufreq-cpu0.c
+++ b/drivers/cpufreq/cpufreq-cpu0.c
@@ -189,12 +189,29 @@ static int cpu0_cpufreq_probe(struct platform_device *pdev)
if (!np) {
pr_err("failed to find cpu0 node\n");
- return -ENOENT;
+ ret = -ENOENT;
+ goto out_put_parent;
}
cpu_dev = &pdev->dev;
cpu_dev->of_node = np;
+ cpu_reg = devm_regulator_get(cpu_dev, "cpu0");
+ if (IS_ERR(cpu_reg)) {
+ /*
+ * If cpu0 regulator supply node is present, but regulator is
+ * not yet registered, we should try defering probe.
+ */
+ if (PTR_ERR(cpu_reg) == -EPROBE_DEFER) {
+ dev_err(cpu_dev, "cpu0 regulator not ready, retry\n");
+ ret = -EPROBE_DEFER;
+ goto out_put_node;
+ }
+ pr_warn("failed to get cpu0 regulator: %ld\n",
+ PTR_ERR(cpu_reg));
+ cpu_reg = NULL;
+ }
+
cpu_clk = devm_clk_get(cpu_dev, NULL);
if (IS_ERR(cpu_clk)) {
ret = PTR_ERR(cpu_clk);
@@ -202,12 +219,6 @@ static int cpu0_cpufreq_probe(struct platform_device *pdev)
goto out_put_node;
}
- cpu_reg = devm_regulator_get(cpu_dev, "cpu0");
- if (IS_ERR(cpu_reg)) {
- pr_warn("failed to get cpu0 regulator\n");
- cpu_reg = NULL;
- }
-
ret = of_init_opp_table(cpu_dev);
if (ret) {
pr_err("failed to init OPP table: %d\n", ret);
@@ -264,6 +275,8 @@ out_free_table:
opp_free_cpufreq_table(cpu_dev, &freq_table);
out_put_node:
of_node_put(np);
+out_put_parent:
+ of_node_put(parent);
return ret;
}