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| author | Linus Walleij <linus.walleij@linaro.org> | 2012-04-10 10:00:38 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2012-04-18 13:53:11 +0200 |
| commit | c05127c4e2c6e7d9949347a76fd05c337bcd5e84 (patch) | |
| tree | 5b23f8a116919028317f026e3f9998dce2ffb828 /drivers/pinctrl/core.c | |
| parent | pinctrl: add some error checking for user interfaces (diff) | |
| download | linux-c05127c4e2c6e7d9949347a76fd05c337bcd5e84.tar.xz linux-c05127c4e2c6e7d9949347a76fd05c337bcd5e84.zip | |
pinctrl: implement pinctrl deferred probing
If drivers try to obtain pinctrl handles for a pin controller that
has not yet registered to the subsystem, we need to be able to
back out and retry with deferred probing. So let's return
-EPROBE_DEFER whenever this location fails. Also downgrade the
errors to info, maybe we will even set them to debug once the
deferred probing is commonplace.
Cc: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/core.c')
| -rw-r--r-- | drivers/pinctrl/core.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index 7ff869007ba4..59027ab8347a 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -518,11 +518,14 @@ static int add_setting(struct pinctrl *p, struct pinctrl_map const *map) setting->pctldev = get_pinctrl_dev_from_devname(map->ctrl_dev_name); if (setting->pctldev == NULL) { - dev_err(p->dev, "unknown pinctrl device %s in map entry", + dev_info(p->dev, "unknown pinctrl device %s in map entry, deferring probe", map->ctrl_dev_name); kfree(setting); - /* Eventually, this should trigger deferred probe */ - return -ENODEV; + /* + * OK let us guess that the driver is not there yet, and + * let's defer obtaining this pinctrl handle to later... + */ + return -EPROBE_DEFER; } switch (map->type) { |