Messages in this thread Patch in this message | | | From | Lukasz Majewski <> | Subject | [PATCH 1/8] thermal:cpu cooling:armada: Provide deferred probing for armada driver | Date | Thu, 13 Nov 2014 18:02:38 +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/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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