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pinctrl: make range registration defer properly

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This makes the pinctrl_find_and_add_gpio_range() return
-EPROBE_DEFER if the range hosting pin controller cannot be
located. We may assume that the common case for why adding a
range fails is that the targe pin controller device has not
probed yet.

Reviewed-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2012-11-20 14:54:18 +01:00
parent 192c369c61
commit dfa9751548
1 changed files with 6 additions and 1 deletions
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7
drivers/pinctrl/core.c
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@ -350,8 +350,13 @@ struct pinctrl_dev *pinctrl_find_and_add_gpio_range(const char *devname,
{
struct pinctrl_dev *pctldev = get_pinctrl_dev_from_devname(devname);
/*
* If we can't find this device, let's assume that is because
* it has not probed yet, so the driver trying to register this
* range need to defer probing.
*/
if (!pctldev)
return NULL;
return ERR_PTR(-EPROBE_DEFER);
pinctrl_add_gpio_range(pctldev, range);
return pctldev;