[PATCH 2/5] Input: ti_am335x_tsc: Mark TSC device as wakeup source

[Vignesh R]

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 <vigne...@ti.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