Re: [PATCH 4/5] iio: adc: ti_am335x_adc: Disable ADC during suspend unconditionally

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Sat, 30 Jun 2018 16:03:17 +0530
Vignesh R <vigneshr@xxxxxx> wrote:

> Parent MFD device takes care of enabling ADC interface whenever
> touchscreen is marked wakeup capable. Therefore, unconditionally disable
> ADC interface during system suspend to save power in case of system with
> just ADC and no TSC.
> 
> Signed-off-by: Vignesh R <vigneshr@xxxxxx>

This sounds like a sensible change to me.   Is it applicable without the
rest of the series?  If so I'll take it through IIO.  If the answer
is that it needs to go with the rest then

Acked-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>

Thanks,

Jonathan
> ---
>  drivers/iio/adc/ti_am335x_adc.c | 12 ++++--------
>  1 file changed, 4 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
> index 80df5a377d30..cafb1dcadc48 100644
> --- a/drivers/iio/adc/ti_am335x_adc.c
> +++ b/drivers/iio/adc/ti_am335x_adc.c
> @@ -693,16 +693,12 @@ static int __maybe_unused tiadc_suspend(struct device *dev)
>  {
>  	struct iio_dev *indio_dev = dev_get_drvdata(dev);
>  	struct tiadc_device *adc_dev = iio_priv(indio_dev);
> -	struct ti_tscadc_dev *tscadc_dev;
>  	unsigned int idle;
>  
> -	tscadc_dev = ti_tscadc_dev_get(to_platform_device(dev));
> -	if (!device_may_wakeup(tscadc_dev->dev)) {
> -		idle = tiadc_readl(adc_dev, REG_CTRL);
> -		idle &= ~(CNTRLREG_TSCSSENB);
> -		tiadc_writel(adc_dev, REG_CTRL, (idle |
> -				CNTRLREG_POWERDOWN));
> -	}
> +	idle = tiadc_readl(adc_dev, REG_CTRL);
> +	idle &= ~(CNTRLREG_TSCSSENB);
> +	tiadc_writel(adc_dev, REG_CTRL, (idle |
> +			CNTRLREG_POWERDOWN));
>  
>  	return 0;
>  }

--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux Arm (vger)]     [ARM Kernel]     [ARM MSM]     [Linux Tegra]     [Linux WPAN Networking]     [Linux Wireless Networking]     [Maemo Users]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Trails]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux