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

Lukasz Majewski
2014-11-13T17:03:12Z

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@samsung.com>
---
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