diff options
| author | Hans Holmberg <hans.holmberg@intel.com> | 2015-02-10 09:48:27 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-06 14:43:31 -0800 |
| commit | e2d7fdcf71cdd35418dc174b49dd58d5267b4bfa (patch) | |
| tree | ac3a7e1a7069ba5eb89b087e49b5dd6f3541a91a | |
| parent | 676b72e20d9a950e9d35d1f21a1cb55ea753abeb (diff) | |
gpiolib: of: allow of_gpiochip_find_and_xlate to find more than one chip per node
commit 9cf75e9e4ddd587ac12e88e8751c358b7b27e95f upstream.
The change:
7b8792bbdffdff3abda704f89c6a45ea97afdc62
gpiolib: of: Correct error handling in of_get_named_gpiod_flags
assumed that only one gpio-chip is registred per of-node.
Some drivers register more than one chip per of-node, so
adjust the matching function of_gpiochip_find_and_xlate to
not stop looking for chips if a node-match is found and
the translation fails.
Fixes: 7b8792bbdffd ("gpiolib: of: Correct error handling in of_get_named_gpiod_flags")
Signed-off-by: Hans Holmberg <hans.holmberg@intel.com>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
Tested-by: Tyler Hall <tylerwhall@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpio/gpiolib-of.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index 74ed17d6cfa1..d26028cb9eac 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -45,12 +45,13 @@ static int of_gpiochip_find_and_xlate(struct gpio_chip *gc, void *data) ret = gc->of_xlate(gc, &gg_data->gpiospec, gg_data->flags); if (ret < 0) { - /* We've found the gpio chip, but the translation failed. - * Return true to stop looking and return the translation - * error via out_gpio + /* We've found a gpio chip, but the translation failed. + * Store translation error in out_gpio. + * Return false to keep looking, as more than one gpio chip + * could be registered per of-node. */ gg_data->out_gpio = ERR_PTR(ret); - return true; + return false; } gg_data->out_gpio = gpio_to_desc(ret + gc->base); |