Messages in this thread | | | Date | Sat, 20 Jul 2013 11:57:29 +0100 | From | Jonathan Cameron <> | Subject | Re: [PATCH 03/15] input: ti_tsc: Enable shared IRQ for TSC |
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On 07/18/2013 11:21 PM, Zubair Lutfullah wrote: > From: "Patil, Rachna" <rachna@ti.com> > > Touchscreen and ADC share the same IRQ line from parent MFD core. > Previously only Touchscreen was interrupt based. > With continuous mode support added in ADC driver, driver requires > interrupt to process the ADC samples, so enable shared IRQ flag bit for > touchscreen. > > Signed-off-by: Patil, Rachna <rachna@ti.com> > Acked-by: Vaibhav Hiremath <hvaibhav@ti.com> > Signed-off-by: Zubair Lutfullah <zubair.lutfullah@gmail.com> cc'd Dmitry and Linux-input.
If this goes through IIO as it is required for the rest of the series to work then I will need an Ack from Dmitry.
> --- > drivers/input/touchscreen/ti_am335x_tsc.c | 14 +++++++++++--- > 1 file changed, 11 insertions(+), 3 deletions(-) > > diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c b/drivers/input/touchscreen/ti_am335x_tsc.c > index 0e9f02a..edc3d03 100644 > --- a/drivers/input/touchscreen/ti_am335x_tsc.c > +++ b/drivers/input/touchscreen/ti_am335x_tsc.c > @@ -260,8 +260,16 @@ static irqreturn_t titsc_irq(int irq, void *dev) > unsigned int fsm; > > status = titsc_readl(ts_dev, REG_IRQSTATUS); > - if (status & IRQENB_FIFO0THRES) { > > + /* > + * ADC and touchscreen share the IRQ line. > + * FIFO1 threshold interrupt is used by ADC, > + * hence return from touchscreen IRQ handler if FIFO1 > + * threshold interrupt occurred. > + */ > + if (status & IRQENB_FIFO1THRES) > + return IRQ_NONE; > + else if (status & IRQENB_FIFO0THRES) { > titsc_read_coordinates(ts_dev, &x, &y, &z1, &z2); > > if (ts_dev->pen_down && z1 != 0 && z2 != 0) { > @@ -315,7 +323,7 @@ static irqreturn_t titsc_irq(int irq, void *dev) > } > > if (irqclr) { > - titsc_writel(ts_dev, REG_IRQSTATUS, irqclr); > + titsc_writel(ts_dev, REG_IRQSTATUS, (status | irqclr)); > am335x_tsc_se_update(ts_dev->mfd_tscadc); > return IRQ_HANDLED; > } > @@ -389,7 +397,7 @@ static int titsc_probe(struct platform_device *pdev) > } > > err = request_irq(ts_dev->irq, titsc_irq, > - 0, pdev->dev.driver->name, ts_dev); > + IRQF_SHARED, pdev->dev.driver->name, ts_dev); > if (err) { > dev_err(&pdev->dev, "failed to allocate irq.\n"); > goto err_free_mem; >
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