From: Bai Ping <b51503@freescale.com>
Date: Tue, 14 Oct 2014 05:12:07 +0000 (+0800)
Subject: thermal: imx: correct driver load sequence for cpu cooling
X-Git-Tag: v4.9.8~5372^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=491b079db3f7fa631f6a012e7e896a1eafe4dd99;p=platform%2Fkernel%2Flinux-rpi3.git

thermal: imx: correct driver load sequence for cpu cooling

thermal driver should be regisetered after cpufreq driver has
been registered and probed. Doing so is to make sure that thermal
driver can get the max cpu cooling states correctly when calling
get_property.

Signed-off-by: Bai Ping <b51503@freescale.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
---

diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index 461bf3d..0e35999 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -459,6 +459,10 @@ static int imx_thermal_probe(struct platform_device *pdev)
 	int measure_freq;
 	int ret;
 
+	if (!cpufreq_get_current_driver()) {
+		dev_dbg(&pdev->dev, "no cpufreq driver!");
+		return -EPROBE_DEFER;
+	}
 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;