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Message-ID: <20131211141607.GJ2281@intel.com> Date: Wed, 11 Dec 2013 16:16:07 +0200 From: Mika Westerberg <mika.westerberg@...ux.intel.com> To: Alexandre Courbot <acourbot@...dia.com> Cc: Linus Walleij <linus.walleij@...aro.org>, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v3] gpiolib: return -ENOENT if no GPIO mapping exists On Wed, Dec 11, 2013 at 11:32:28AM +0900, Alexandre Courbot wrote: > Some devices drivers make use of optional GPIO parameters. For such > drivers, it is important to discriminate between the case where no > GPIO mapping has been defined for the function they are requesting, and > the case where a mapping exists but an error occured while resolving it > or when acquiring the GPIO. > > This patch changes the family of gpiod_get() functions such that they > will return -ENOENT if and only if no GPIO mapping is defined for the > requested function. Other error codes are used when an actual error > occured during the GPIO resolution. > > Signed-off-by: Alexandre Courbot <acourbot@...dia.com> > Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@...ux.intel.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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