linux-kernel - [PATCH 0/2] More precise error reporting for of_get_named

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Date:	Fri, 29 Jun 2012 13:57:57 +0900
From:	Alexandre Courbot <acourbot@...dia.com>
To:	Rob Herring <rob.herring@...xeda.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Linus Walleij <linus.walleij@...ricsson.com>
CC:	<linux-kernel@...r.kernel.org>,
	<devicetree-discuss@...ts.ozlabs.org>,
	Alexandre Courbot <acourbot@...dia.com>
Subject: [PATCH 0/2] More precise error reporting for of_get_named_gpio

of_get_named_gpio is a very convenient way to get a GPIO from a device
tree. However it makes no difference between an invalid property or
the absence of it and returns -EINVAL in both cases.

Sometimes a GPIO property can be optional, and so far we need to use
a separate call to e.g. of_get_property. These two patches make it
possible to differenciate both cases by having
of_parse_phandle_with_args return -ENOENT instead of -EINVAL if the
requested property does not exist, and of_get_named_gpio_flags
propage the return value of of_parse_phandle_with_args instead of
invariably returning -EINVAL/

Alexandre Courbot (2):
  of: return -ENOENT when no property
  gpio: propagate of_parse_phandle_with_args errors

 drivers/gpio/gpiolib-of.c | 2 +-
 drivers/of/base.c         | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

-- 
1.7.11.1

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