* Faiz Abbas <faiz_ab...@ti.com> [180607 10:24]:
> Hi,
>
> On Thursday 07 June 2018 01:05 PM, Tony Lindgren wrote:
> > * Faiz Abbas <faiz_ab...@ti.com> [180606 06:14]:
> >> +static int sysc_reset(struct sysc *ddata)
> >> +{
> >> + int offset = ddata->offsets[SYSC_SYSCONFIG];
> >> + int val = sysc_read(ddata, offset);
> >> +
> >> + val |= (0x1 << ddata->cap->regbits->srst_shift);
> >> + sysc_write(ddata, offset, val);
> >> +
> >> + /* Poll on reset status */
> >> + if (ddata->cfg.quirks & SYSC_QUIRK_RESET_STATUS) {
> >> + offset = ddata->offsets[SYSC_SYSSTATUS];
> >> +
> >> + return readl_poll_timeout(ddata->module_va + offset, val,
> >> + (val & ddata->cfg.syss_mask) == 0x0,
> >> + 100, MAX_MODULE_SOFTRESET_WAIT);
> >> + }
> >> +
> >> + return 0;
> >> +}
> >
> > I wonder if we should also add SYSS_QUIRK_RESET_STATUS in
> > addition to SYSC_QUIRK_RESET status to make it easy to
> > read the right register?
>
> I assumed SYSC_QUIRK is the prefix to indicate the ti-sysc driver not
> the register. Are there layouts in which the reset status bit is in the
> sysconfig register rather than the sysstatus register?
Yes we can have reset status bit in either syss or syssconfig register.
We detect that in sysc_init_syss_mask() but we should also set something
at that point to make it clear which reset to use. But as we don't need
the quirk flag, it's probably set a function pointer after the detection.
So how about let's have two functions sysc_reset() and sysc_syss_reset()
and then we can implement sysc_syss_reset() in a separate patch after
testing it when we have a non-platform data using example for
sysc_syss_reset().
Regards,
Tony
