Messages in this thread Patch in this message | | | From | Lukasz Majewski <> | Subject | [PATCH 3/8] thermal:cpu cooling:rcar: Provide deferred probing for rcar driver | Date | Thu, 13 Nov 2014 18:02:40 +0100 |
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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/rcar_thermal.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/thermal/rcar_thermal.c b/drivers/thermal/rcar_thermal.c index 8803e69..b268b4d 100644 --- a/drivers/thermal/rcar_thermal.c +++ b/drivers/thermal/rcar_thermal.c @@ -29,6 +29,7 @@ #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/thermal.h> +#include <linux/cpufreq.h> #define IDLE_INTERVAL 5000 @@ -373,6 +374,12 @@ static int rcar_thermal_probe(struct platform_device *pdev) int ret = -ENODEV; int idle = IDLE_INTERVAL; +#ifdef CONFIG_CPU_THERMAL + if (!cpufreq_get_current_driver()) { + dev_dbg(&pdev->dev, "no cpufreq driver!"); + return -EPROBE_DEFER; + } +#endif common = devm_kzalloc(dev, sizeof(*common), GFP_KERNEL); if (!common) return -ENOMEM; -- 2.0.0.rc2
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