On Tue, Sep 13, 2016 at 9:13 AM, Deepak <deepak_...@mentor.com> wrote:
> strict pin controller returns -EINVAL in case of pin request which
> is already claimed by somebody else.
> Following is the sequence of calling pin_request() from
> pinctrl_bind_pins():-
> pinctrl_bind_pins()->pinctrl_select_state()->pinmux_enable_setting()->
> pin_request()
>
> But pinctrl_bind_pins() only returns -EPROBE_DEFER which makes device
> driver probe successful even if the pin request is rejected by the pin
> controller subsystem.
>
> This commit modifies pinctrl_bind_pins() to return error if the pin is
> rejected by pin control subsystem.
>
> Signed-off-by: Deepak Das <deepak_...@mentor.com>
Aha
> /* Only return deferrals */
> - if (ret != -EPROBE_DEFER)
> + if ((ret != -EPROBE_DEFER) && (ret != -EINVAL))
> ret = 0;
I rewrote this when applying, like this:
- /* Only return deferrals */
- if (ret != -EPROBE_DEFER)
- ret = 0;
+ /* Return deferrals */
+ if (ret == -EPROBE_DEFER)
+ return ret;
+ if (ret == -EINVAL) {
+ dev_err(dev, "could not initialize pin control state\n");
+ return ret;
+ }
+ /* We ignore errors like -ENOENT meaning no pinctrl state */
- return ret;
+ return 0;
Can you confim that this works for you too?
Yours,
Linus Walleij
