From: Jonathan Cameron <jic23@kernel.org>
To: Zubair Lutfullah <zubair.lutfullah@gmail.com>
Cc: jic23@cam.ac.uk, gregkh@linuxfoundation.org,
linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
koen@dominion.thruhere.net, Torokhov <dmitry.torokhov@gmail.com>,
"linux-iio@vger.kernel.org" <linux-iio@vger.kernel.org>
Subject: Re: [PATCH 03/15] input: ti_tsc: Enable shared IRQ for TSC
Date: Sat, 20 Jul 2013 11:57:29 +0100 [thread overview]
Message-ID: <51EA6D19.7040401@kernel.org> (raw)
In-Reply-To: <1374186086-5015-4-git-send-email-zubair.lutfullah@gmail.com>
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;
>
next prev parent reply other threads:[~2013-07-20 10:57 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-18 22:21 [PATCH 00/15] iio: ti_am335x_adc: Add continuous mode take 2 Zubair Lutfullah
2013-07-18 22:21 ` [PATCH 01/15] MFD: ti_tscadc: disable TSC config registers in adc mode Zubair Lutfullah
2013-07-18 22:45 ` Greg KH
2013-07-19 20:47 ` Zubair Lutfullah :
2013-07-19 23:13 ` Greg KH
2013-07-18 22:21 ` [PATCH 02/15] iio: ti_am335x_adc: Fix wrong samples received on 1st read Zubair Lutfullah
2013-07-20 10:52 ` Jonathan Cameron
2013-07-18 22:21 ` [PATCH 03/15] input: ti_tsc: Enable shared IRQ for TSC Zubair Lutfullah
2013-07-20 10:57 ` Jonathan Cameron [this message]
2013-07-20 10:58 ` Jonathan Cameron
2013-07-18 22:21 ` [PATCH 04/15] iio: mfd: input: ti_am335x_adc:Add support for continuous mode Zubair Lutfullah
2013-07-20 11:15 ` Jonathan Cameron
2013-07-18 22:21 ` [PATCH 05/15] MFD: ti_tscadc: ADC Clock check not required Zubair Lutfullah
2013-07-20 11:16 ` Jonathan Cameron
2013-07-18 22:21 ` [PATCH 06/15] iio: ti_am335x_adc: Handle set to clear IRQENABLE Zubair Lutfullah
2013-07-20 11:19 ` Jonathan Cameron
2013-07-18 22:21 ` [PATCH 07/15] iio: ti_am335x_adc: Handle set to clear IRQSTATUS Zubair Lutfullah
2013-07-18 22:21 ` [PATCH 08/15] iio: ti_am335x_adc: Handle overrun before threshold event Zubair Lutfullah
2013-07-20 11:21 ` Jonathan Cameron
2013-07-18 22:21 ` [PATCH 09/15] iio: ti_am335x_adc: Avoid double " Zubair Lutfullah
2013-07-18 22:21 ` [PATCH 10/15] iio: ti_am335x_adc: Also clear threshold event when clearing overrun event Zubair Lutfullah
2013-07-18 22:21 ` [PATCH 11/15] iio: ti_am335x_adc: Print error and handle short FIFO events Zubair Lutfullah
2013-07-18 22:21 ` [PATCH 12/15] iio: ti_am335x_adc: Fix allocation count of FIFO buffer Zubair Lutfullah
2013-07-18 22:21 ` [PATCH 13/15] iio: ti_am335x_adc: Fix capture operation during resume Zubair Lutfullah
2013-07-18 22:21 ` [PATCH 14/15] iio: ti_am335x_adc: Reset and clear overrun status before capture Zubair Lutfullah
2013-07-18 22:21 ` [PATCH 15/15] iio: ti_am335x_adc: Properly handle out of memory situation Zubair Lutfullah
2013-07-20 11:25 ` [PATCH 00/15] iio: ti_am335x_adc: Add continuous mode take 2 Jonathan Cameron
2013-07-20 12:47 ` Zubair Lutfullah :
2013-07-20 12:54 ` Lars-Peter Clausen
2013-07-20 13:50 ` Jonathan Cameron
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