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Message-ID: <1420541422-27602-1-git-send-email-b20788@freescale.com>
Date: Tue, 6 Jan 2015 18:50:22 +0800
From: Anson Huang <b20788@...escale.com>
To: <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <edubezval@...il.com>, <rui.zhang@...el.com>,
<jangra.pankaj9@...il.com>
Subject: [PATCH V2] 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@...escale.com>
---
drivers/thermal/imx_thermal.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index 461bf3d..dc8bcd8 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -600,6 +600,7 @@ 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;
}
@@ -609,6 +610,7 @@ 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);
--
1.9.1
--
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