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From: Anson Huang <b20788@freescale.com>
To: <linux-pm@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Cc: <edubezval@gmail.com>, <rui.zhang@intel.com>, <jangra.pankaj9@gmail.com>
Subject: [PATCH V2] Thermal: imx: add clk disable/enable for suspend/resume
Date: Tue, 6 Jan 2015 18:50:22 +0800	[thread overview]
Message-ID: <1420541422-27602-1-git-send-email-b20788@freescale.com> (raw)

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>
---
 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


WARNING: multiple messages have this Message-ID (diff)
From: Anson Huang <b20788@freescale.com>
To: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: edubezval@gmail.com, rui.zhang@intel.com, jangra.pankaj9@gmail.com
Subject: [PATCH V2] Thermal: imx: add clk disable/enable for suspend/resume
Date: Tue, 6 Jan 2015 18:50:22 +0800	[thread overview]
Message-ID: <1420541422-27602-1-git-send-email-b20788@freescale.com> (raw)

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>
---
 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

             reply	other threads:[~2015-01-06  2:55 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-06 10:50 Anson Huang [this message]
2015-01-06 10:50 ` [PATCH V2] Thermal: imx: add clk disable/enable for suspend/resume Anson Huang
2015-01-06 13:25 ` Eduardo Valentin

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