Re: [PATCH v1] gpio: keystone: add dsp gpio controller driver

[Alexander Shiyan <shc_work@xxxxxxx>]

Wed, 23 Jul 2014 17:10:26 +0200 от Linus Walleij <linus.walleij@xxxxxxxxxx>:
> On Wed, Jul 16, 2014 at 12:43 PM, Grygorii Strashko
> <grygorii.strashko@xxxxxx> wrote:
> 
> > From: Murali Karicheri <m-karicheri2@xxxxxx>
> >
> > On Keystone SOCs, ARM host can send interrupts to DSP cores using the
> > DSP GPIO controller IP. Each DSP GPIO controller provides 28 IRQ signals for
> > each DSP core. This is one of the component used by the IPC mechanism used
> > on Keystone SOCs.
> >
> > Keystone 2 DSP GPIO controller has specific features:
> > - each GPIO can be configured only as output pin;
> > - setting GPIO value to 1 causes IRQ generation on target DSP core;
> > - reading pin value returns 0 - if IRQ was handled or 1 - IRQ is still
> >   pending.
> >
> > Signed-off-by: Murali Karicheri <m-karicheri2@xxxxxx>
> > Signed-off-by: Grygorii Strashko <grygorii.strashko@xxxxxx>
...
> And if you proceed with this, please integrate it with
> drivers/gpio/gpio-syscon.c, I don't need more special
> syscons GPIO handlers.
> 
> > +#include <linux/mfd/syscon.h>
> 
> Kconfig needs depends on MFD_SYSCON, right?

It should be selected by the platform. For compile test this symbol
is not needed.

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