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authorAnson Huang <b20788@freescale.com>2015-01-06 13:50:22 +0300
committerEduardo Valentin <edubezval@gmail.com>2015-01-06 16:35:15 +0300
commitd26eef8b725da620980ee20f7812f4488a206483 (patch)
treeaa77e88d276f8a3b2451ccbba1a232de46eb1f60 /drivers/thermal
parent5a723e81923410f0d3ae4c38974607b13befdda9 (diff)
downloadlinux-d26eef8b725da620980ee20f7812f4488a206483.tar.xz
Thermal: imx: add clk disable/enable for suspend/resume
Thermal sensor's clk is from pll3_usb_otg, per hardware design requirement, need to make sure pll3_usb_otg is disabled before STOP mode is entered, otherwise, all PFDs under it may enter incorrect state, this patch disables pll3_usb_otg before suspend and enables it after resume. Signed-off-by: Anson Huang <b20788@freescale.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'drivers/thermal')
-rw-r--r--drivers/thermal/imx_thermal.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index c1188ac053c9..2ccbc0788353 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -608,6 +608,7 @@ static int imx_thermal_suspend(struct device *dev)
regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP);
regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN);
data->mode = THERMAL_DEVICE_DISABLED;
+ clk_disable_unprepare(data->thermal_clk);
return 0;
}
@@ -617,6 +618,7 @@ static int imx_thermal_resume(struct device *dev)
struct imx_thermal_data *data = dev_get_drvdata(dev);
struct regmap *map = data->tempmon;
+ clk_prepare_enable(data->thermal_clk);
/* Enabled thermal sensor after resume */
regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);
regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP);