Messages in this thread | | | Date | Sun, 21 Aug 2011 21:31:07 -0700 | From | Dmitry Torokhov <> | Subject | Re: [PATCH 1/3] Input: cyttsp - Cypress TTSP capacitive multi-touch screen support |
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Hi Javier,
On Sat, Aug 20, 2011 at 12:01:50AM -0400, Javier Martinez Canillas wrote: > Cypress TrueTouch(tm) Standard Product controllers are found in > a wide range of embedded devices. This driver add support for a > variety of TTSP controllers. > > The driver is composed of a core driver that process the data sent by > the contacts and a set of bus specific interface modules. This patch > adds the base core TTSP driver. > > The original author of the driver is Kevin McNeely <kev@cypress.com> > > Since the hardware is capable of tracking identifiable contacts and the > original driver used multi-touch protocol type A (stateless), multi-touch > protocol type B (stateful) support was added by Javier Martinez Canillas. >
Still reading through the patches, but have one question:
> + > + ts->irq = gpio_to_irq(ts->platform_data->irq_gpio); > + if (ts->irq <= 0) { > + dev_dbg(ts->dev, "%s: Error, failed to allocate irq\n", > + __func__); > + goto error_init; > + }
Why do we need to get gpio/irq from platform data instead of having board code set up controllers appropriately and use IRQ either from I2C client structure or from SPI?
Thanks.
-- Dmitry
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