linux-kernel - Re: [PATCH 2/5] Input: ti_am335x_tsc: Mark TSC device as wakeup source

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Message-ID: <20180718170642.2ebl5msdn6aahdas@penguin>
Date:   Wed, 18 Jul 2018 17:06:42 +0000
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Vignesh R <vigneshr@...com>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Lee Jones <lee.jones@...aro.org>, linux-iio@...r.kernel.org,
        linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-input@...r.kernel.org
Subject: Re: [PATCH 2/5] Input: ti_am335x_tsc: Mark TSC device as wakeup
 source

On Sat, Jun 30, 2018 at 04:03:15PM +0530, Vignesh R wrote:
> Instead of TSCADC MFD device, mark TSC as wakeup source and change all
> wakeup related PM calls to operate on TSC device.
> 
> Signed-off-by: Vignesh R <vigneshr@...com>

Acked-by: Dmitry Torokhov <dmitry.torokhov@...il.com>

> ---
>  drivers/input/touchscreen/ti_am335x_tsc.c | 16 +++++++++++-----
>  1 file changed, 11 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c b/drivers/input/touchscreen/ti_am335x_tsc.c
> index b86c1e5fbc11..a4f25a915ffc 100644
> --- a/drivers/input/touchscreen/ti_am335x_tsc.c
> +++ b/drivers/input/touchscreen/ti_am335x_tsc.c
> @@ -46,6 +46,7 @@ static const int config_pins[] = {
>  struct titsc {
>  	struct input_dev	*input;
>  	struct ti_tscadc_dev	*mfd_tscadc;
> +	struct device		*dev;
>  	unsigned int		irq;
>  	unsigned int		wires;
>  	unsigned int		x_plate_resistance;
> @@ -276,7 +277,7 @@ static irqreturn_t titsc_irq(int irq, void *dev)
>  	if (status & IRQENB_HW_PEN) {
>  		ts_dev->pen_down = true;
>  		irqclr |= IRQENB_HW_PEN;
> -		pm_stay_awake(ts_dev->mfd_tscadc->dev);
> +		pm_stay_awake(ts_dev->dev);
>  	}
>  
>  	if (status & IRQENB_PENUP) {
> @@ -286,7 +287,7 @@ static irqreturn_t titsc_irq(int irq, void *dev)
>  			input_report_key(input_dev, BTN_TOUCH, 0);
>  			input_report_abs(input_dev, ABS_PRESSURE, 0);
>  			input_sync(input_dev);
> -			pm_relax(ts_dev->mfd_tscadc->dev);
> +			pm_relax(ts_dev->dev);
>  		} else {
>  			ts_dev->pen_down = true;
>  		}
> @@ -422,6 +423,7 @@ static int titsc_probe(struct platform_device *pdev)
>  	ts_dev->mfd_tscadc = tscadc_dev;
>  	ts_dev->input = input_dev;
>  	ts_dev->irq = tscadc_dev->irq;
> +	ts_dev->dev = &pdev->dev;
>  
>  	err = titsc_parse_dt(pdev, ts_dev);
>  	if (err) {
> @@ -436,6 +438,8 @@ static int titsc_probe(struct platform_device *pdev)
>  		goto err_free_mem;
>  	}
>  
> +	device_init_wakeup(&pdev->dev, true);
> +
>  	titsc_writel(ts_dev, REG_IRQSTATUS, TSC_IRQENB_MASK);
>  	titsc_writel(ts_dev, REG_IRQENABLE, IRQENB_FIFO0THRES);
>  	titsc_writel(ts_dev, REG_IRQENABLE, IRQENB_EOS);
> @@ -467,6 +471,7 @@ static int titsc_probe(struct platform_device *pdev)
>  	return 0;
>  
>  err_free_irq:
> +	device_init_wakeup(&pdev->dev, false);
>  	free_irq(ts_dev->irq, ts_dev);
>  err_free_mem:
>  	input_free_device(input_dev);
> @@ -479,6 +484,7 @@ static int titsc_remove(struct platform_device *pdev)
>  	struct titsc *ts_dev = platform_get_drvdata(pdev);
>  	u32 steps;
>  
> +	device_init_wakeup(&pdev->dev, false);
>  	free_irq(ts_dev->irq, ts_dev);
>  
>  	/* total steps followed by the enable mask */
> @@ -499,7 +505,7 @@ static int __maybe_unused titsc_suspend(struct device *dev)
>  	unsigned int idle;
>  
>  	tscadc_dev = ti_tscadc_dev_get(to_platform_device(dev));
> -	if (device_may_wakeup(tscadc_dev->dev)) {
> +	if (device_may_wakeup(dev)) {
>  		titsc_writel(ts_dev, REG_IRQSTATUS, TSC_IRQENB_MASK);
>  		idle = titsc_readl(ts_dev, REG_IRQENABLE);
>  		titsc_writel(ts_dev, REG_IRQENABLE,
> @@ -515,11 +521,11 @@ static int __maybe_unused titsc_resume(struct device *dev)
>  	struct ti_tscadc_dev *tscadc_dev;
>  
>  	tscadc_dev = ti_tscadc_dev_get(to_platform_device(dev));
> -	if (device_may_wakeup(tscadc_dev->dev)) {
> +	if (device_may_wakeup(dev)) {
>  		titsc_writel(ts_dev, REG_IRQWAKEUP,
>  				0x00);
>  		titsc_writel(ts_dev, REG_IRQCLR, IRQENB_HW_PEN);
> -		pm_relax(ts_dev->mfd_tscadc->dev);
> +		pm_relax(dev);
>  	}
>  	titsc_step_config(ts_dev);
>  	titsc_writel(ts_dev, REG_FIFO0THR,
> -- 
> 2.18.0
> 

-- 
Dmitry