From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anson Huang Subject: [PATCH V2] Thermal: imx: add clk disable/enable for suspend/resume Date: Tue, 6 Jan 2015 18:50:22 +0800 Message-ID: <1420541422-27602-1-git-send-email-b20788@freescale.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Sender: linux-kernel-owner@vger.kernel.org To: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: edubezval@gmail.com, rui.zhang@intel.com, jangra.pankaj9@gmail.com List-Id: linux-pm@vger.kernel.org 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 --- 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