Re: OMAP3 ROM RNG probe failure on N900

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Hi,

On Tue, Aug 27, 2019 at 10:11:20AM +0200, Pali Rohár wrote:
> On Monday 26 August 2019 11:00:21 Tero Kristo wrote:
> > On 24.8.2019 0.46, Aaro Koskinen wrote:
> > > I was looking at N900 boot logs from the current mainline (v5.3-rc),
> > > and noticed this:
> > > 
> > > [    3.297668] omap3_rom_rng: initializing
> > > [    3.301940] omap3_rom_rng: unable to get RNG clock
> > > [    3.307006] omap3-rom-rng: probe of omap3-rom-rng failed with error -2
> > > 
> > > It seems some clock data was deleted with 0ed266d7ae5e ("clk: ti: omap3:
> > > cleanup unnecessary clock aliases"), including one for omap3-rom-rng.
> > > How this driver is supposed to work now? I guess it has been broken for
> > > a while. :-(
> > 
> > You should have a DT node for the device, which contains the clock handle.
> 
> Hello, I have not tested new kernel on N900 for a longer time. And at
> that time (4.9) it worked fine. So it is just missing DT node? Maybe you
> could fix it when you testing it?

The driver does not seem to have DT support, it has only legacy init in
pdata-quirks. So maybe deleting the clock alias was premature.

A.



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