On Fri, 2015-06-05 at 17:26 +0800, Peter Chen wrote:
> On Fri, Jun 05, 2015 at 10:37:07AM +0300, Ivan T. Ivanov wrote:
<snip>
>
> > > > +
> > > > +static int ci_id_notifier(struct notifier_block *nb, unsigned long event,
> > > > + void *ptr)
> > > > +{
> > > > + struct ci_hdrc_cable *id = container_of(nb, struct ci_hdrc_cable, nb);
> > > > + struct ci_hdrc *ci = id->ci;
> > > > +
> > > > + if (event)
> > > > + id->state = false;
> > > > + else
> > > > + id->state = true;
> > > > +
> > > > + id->changed = true;
> > > > +
>
> How to know the id value must be changed?
> How about using id->changed = (event != id->state) ? true : false?
> of cos, it needs to move before if {}.
This is handled already by extcon framework.
>
> The same change may need to add to vbus notifier.
>
> > > > + ci_irq(ci->irq, ci);
> > > > + return NOTIFY_DONE;
> > > > +}
> > > > +
> > > > static int ci_get_platdata(struct device *dev,
> > > > struct ci_hdrc_platform_data *platdata)
> > > > {
> > > > + struct extcon_dev *ext_vbus, *ext_id;
> > > > + struct ci_hdrc_cable *cable;
> > > > + int ret;
> > > > +
> > > > if (!platdata->phy_mode)
> > > > platdata->phy_mode = of_usb_get_phy_mode(dev->of_node);
> > > >
> > > > @@ -591,9 +630,89 @@ static int ci_get_platdata(struct device *dev,
> > > > if (of_usb_get_maximum_speed(dev->of_node) == USB_SPEED_FULL)
> > > > platdata->flags |= CI_HDRC_FORCE_FULLSPEED;
> > > >
> > > > + ext_id = ERR_PTR(-ENODEV);
> > > > + ext_vbus = ERR_PTR(-ENODEV);
> > > > + if (of_property_read_bool(dev->of_node, "extcon")) {
> > > > + /* Each one of them is not mandatory */
> > > > + ext_vbus = extcon_get_edev_by_phandle(dev, 0);
> > > > + if (IS_ERR(ext_vbus) && PTR_ERR(ext_vbus) != -ENODEV)
> > > > + return PTR_ERR(ext_vbus);
> > > > +
> > > > + ext_id = extcon_get_edev_by_phandle(dev, 1);
> > > > + if (IS_ERR(ext_id) && PTR_ERR(ext_id) != -ENODEV)
> > > > + return PTR_ERR(ext_id);
> > > > + }
> > > > +
> > > > + cable = &platdata->vbus_extcon;
> > > > + cable->nb.notifier_call = ci_vbus_notifier;
> > > > + cable->edev = ext_vbus;
> > > > +
> > > > + if (!IS_ERR(ext_vbus)) {
> > > > + ret = extcon_get_cable_state(cable->edev, "USB");
>
> I have not read extcon framework too much, but seems you should only
> can get cable state after register it (through ci_extcon_register)?
> ci_get_platdata is called before ci core probe.
No that is not a problem, you can always read cable state if you have
reference to extcon device.
Will fix remaining comments in next version.
Regards,
Ivan
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