Vaibhav,
<SNIP>
> > > >
> > > > - if (!pdata) {
> > > > + if (!pdata && !pdev->dev.of_node) {
> > > > dev_err(&pdev->dev, "Could not find platform data\n");
> > > > return -EINVAL;
> > > > }
> > > >
> > > > - if (pdata->adc_init)
> > > > - adc_channels = pdata->adc_init->adc_channels;
> > > > + if (pdev->dev.platform_data) {
> > > > + if (pdata->tsc_init)
> > > > + tsc_wires = pdata->tsc_init->wires;
> > > > +
> > > > + if (pdata->adc_init)
> > > > + adc_channels = pdata->adc_init->adc_channels;
> > > > + } else {
> > > > + node = of_find_node_by_name(pdev->dev.of_node, "tsc");
> > > > + of_property_read_u32(node, "ti,wires", &tsc_wires);
> > > > +
> > > > + node = of_find_node_by_name(pdev->dev.of_node, "adc");
> > > > + of_property_read_u32(node, "ti,adc-channels",
> > > > &adc_channels);
> > > > + }
> > >
> > > Since AM335x is DT only, why is there a platform data codepath and why is
> > > it the first branch it tries? And I guess the next question is related to
> > > the first: why doesn't it work when used with DT? When I copy over the
> > > nodes from the evm.dts to my board I get "tsc tsc: Missing platform data"
> > > in dmesg.
> >
> > This IP came up 1st on AM335x, but it is not platform dependent. The driver
> > can be used on other platforms where-in DT is not supported.
> > According to the maintainers platform data takes precedence over DT. Hence
> > the order.
> >
>
> Rachana,
>
> I see no point adding support for platform_data when you know that none of
> older platforms are going to use this driver and all future platforms _must_
> follow device-tree model.
>
> So I agree that you should remove board file dependency from the driver.
Ok. I will remove support for platform data in the next version of patches.
>
>
> > I do not see "Missing platform data" error msg in the latest driver. I am
> > not able to trace from where this got populated.
> >
>
> Can you share the branch which you have tested?
https://github.com/patilrachna/linux/tree/v3.8_rc3_MFD_TSCADC_DT-v2
Regards,
Rachna
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