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MLK-18662 iio: adc: imx8qxp_adc: add runtime suspend/resume support 

Add runtime suspend/resume support for imx8QXP ADC

Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Acked-by: Fugang Duan <fugang.duan@nxp.com>
pull/10/head
Haibo Chen 2018-06-22 15:50:28 +08:00 committed by Jason Liu
parent 13ff5d9041
commit cee695f4f7
1 changed files with 29 additions and 3 deletions
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32
drivers/iio/adc/imx8qxp_adc.c
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@ -17,6 +17,7 @@
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
@ -400,6 +401,8 @@ static int imx8qxp_adc_read_raw(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_RAW:
pm_runtime_get_sync(adc->dev);
mutex_lock(&indio_dev->mlock);
reinit_completion(&adc->completion);
@ -417,6 +420,10 @@ static int imx8qxp_adc_read_raw(struct iio_dev *indio_dev,
ret = wait_for_completion_interruptible_timeout
(&adc->completion, IMX8QXP_ADC_TIMEOUT);
pm_runtime_mark_last_busy(adc->dev);
pm_runtime_put_sync_autosuspend(adc->dev);
if (ret == 0) {
mutex_unlock(&indio_dev->mlock);
return -ETIMEDOUT;
@ -480,8 +487,13 @@ static int imx8qxp_adc_reg_access(struct iio_dev *indio_dev,
if (!readval || reg % 4 || reg > IMX8QXP_REG_ADC_TST)
return -EINVAL;
pm_runtime_get_sync(adc->dev);
*readval = readl(adc->regs + reg);
pm_runtime_mark_last_busy(adc->dev);
pm_runtime_put_sync_autosuspend(adc->dev);
return 0;
}
@ -602,6 +614,11 @@ static int imx8qxp_adc_probe(struct platform_device *pdev)
goto error_iio_device_register;
}
pm_runtime_set_active(&pdev->dev);
pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_enable(&pdev->dev);
return 0;
error_iio_device_register:
@ -619,6 +636,8 @@ static int imx8qxp_adc_remove(struct platform_device *pdev)
struct iio_dev *indio_dev = platform_get_drvdata(pdev);
struct imx8qxp_adc *adc = iio_priv(indio_dev);
pm_runtime_get_sync(&pdev->dev);
iio_device_unregister(indio_dev);
imx8qxp_adc_disable(adc);
@ -627,10 +646,14 @@ static int imx8qxp_adc_remove(struct platform_device *pdev)
clk_disable_unprepare(adc->ipg_clk);
regulator_disable(adc->vref);
pm_runtime_disable(&pdev->dev);
pm_runtime_put_noidle(&pdev->dev);
return 0;
}
static int __maybe_unused imx8qxp_adc_suspend(struct device *dev)
static int imx8qxp_adc_runtime_suspend(struct device *dev)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct imx8qxp_adc *adc = iio_priv(indio_dev);
@ -644,7 +667,7 @@ static int __maybe_unused imx8qxp_adc_suspend(struct device *dev)
return 0;
}
static int __maybe_unused imx8qxp_adc_resume(struct device *dev)
static int imx8qxp_adc_runtime_resume(struct device *dev)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct imx8qxp_adc *adc = iio_priv(indio_dev);
@ -679,7 +702,10 @@ static int __maybe_unused imx8qxp_adc_resume(struct device *dev)
return 0;
}
static SIMPLE_DEV_PM_OPS(imx8qxp_adc_pm_ops, imx8qxp_adc_suspend, imx8qxp_adc_resume);
static const struct dev_pm_ops imx8qxp_adc_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
SET_RUNTIME_PM_OPS(imx8qxp_adc_runtime_suspend, imx8qxp_adc_runtime_resume, NULL)
};
static struct platform_driver imx8qxp_adc_driver = {
.probe = imx8qxp_adc_probe,