Re: [PATCH v6 6/8] input: touchscreen: imx25 tcq driver

[Dmitry Torokhov <dmitry.torokhov@gmail.com>]

On Thu, Jan 29, 2015 at 07:56:40PM +0530, Varka Bhadram wrote:
> Hi,
> 
> On Thursday 29 January 2015 07:39 PM, Markus Pargmann wrote:
> >This is a driver for the imx25 ADC/TSC module. It controls the
> >touchscreen conversion queue and creates a touchscreen input device.
> >The driver currently only supports 4 wire touchscreens. The driver uses
> >a simple conversion queue of precharge, touch detection, X measurement,
> >Y measurement, precharge and another touch detection.
> >
> >This driver uses the regmap from the parent to setup some touch specific
> >settings in the core driver and setup a idle configuration with touch
> >detection.
> >
> >Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
> >Signed-off-by: Denis Carikli <denis@eukrea.com>
> >Acked-by: Dmitry Torokhov <dtor@vmware.com>
> >Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
> >---
> >  drivers/input/touchscreen/Kconfig         |   6 +
> >  drivers/input/touchscreen/Makefile        |   1 +
> >  drivers/input/touchscreen/fsl-imx25-tcq.c | 587 ++++++++++++++++++++++++++++++
> >  3 files changed, 594 insertions(+)
> >  create mode 100644 drivers/input/touchscreen/fsl-imx25-tcq.c
> >
> (...)
> 
> >+	ret = request_threaded_irq(priv->irq, mx25_tcq_irq, mx25_tcq_irq_thread,
> >+				   IRQF_ONESHOT, pdev->name, priv);
> 
> We can use devres API for request_thread_irq()...
> 
> >+	if (ret) {
> >+		dev_err(dev, "Failed requesting IRQ\n");
> >+		goto err_clk_unprepare;
> >+	}
> >+
> >+	ret = mx25_tcq_init(priv);
> >+	if (ret) {
> >+		dev_err(dev, "Failed to init tcq\n");
> >+		goto error_free_irq;
> >+	}
> >+
> >+	platform_set_drvdata(pdev, priv);
> >+
> >+	return 0;
> >+
> >+error_free_irq:
> >+	free_irq(priv->irq, priv);
> 
> This is not required if we use devres API

Yes it does - you do not really want to stop clocks in the middle of
servicing interrupt.

Thanks.

-- 
Dmitry