[PATCH 1/8] thermal:cpu cooling:armada: Provide deferred probing for armada driver

[Lukasz Majewski]

When CPU freq is used as a thermal zone cooling device, one needs to wait
until cpufreq subsystem is properly initialized.

This code is similar to the one already available in imx_thermal.c file.

Signed-off-by: Lukasz Majewski <l.majewski@xxxxxxxxxxx>
---
 drivers/thermal/armada_thermal.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c
index 9d1420a..1b5d15d 100644
--- a/drivers/thermal/armada_thermal.c
+++ b/drivers/thermal/armada_thermal.c
@@ -23,6 +23,7 @@
 #include <linux/platform_device.h>
 #include <linux/of_device.h>
 #include <linux/thermal.h>
+#include <linux/cpufreq.h>
 
 #define THERMAL_VALID_MASK		0x1
 
@@ -280,6 +281,12 @@ static int armada_thermal_probe(struct platform_device *pdev)
 	struct armada_thermal_priv *priv;
 	struct resource *res;
 
+#ifdef CONFIG_CPU_THERMAL
+	if (!cpufreq_get_current_driver()) {
+		dev_dbg(&pdev->dev, "no cpufreq driver!");
+		return -EPROBE_DEFER;
+	}
+#endif
 	match = of_match_device(armada_thermal_id_table, &pdev->dev);
 	if (!match)
 		return -ENODEV;
-- 
2.0.0.rc2

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