[PATCH v6 05/13] PCI: brcmstb: Use bridge reset if available
Krzysztof Wilczyński
kw at linux.com
Tue Sep 3 07:46:13 PDT 2024
Hello,
[...]
> > > static void brcm_pcie_bridge_sw_init_set_generic(struct brcm_pcie *pcie, u32 val)
> > > {
> > > - u32 tmp, mask = RGR1_SW_INIT_1_INIT_GENERIC_MASK;
> > > - u32 shift = RGR1_SW_INIT_1_INIT_GENERIC_SHIFT;
> > > + if (val)
> > > + reset_control_assert(pcie->bridge_reset);
> > > + else
> > > + reset_control_deassert(pcie->bridge_reset);
> > >
> > > - tmp = readl(pcie->base + PCIE_RGR1_SW_INIT_1(pcie));
> > > - tmp = (tmp & ~mask) | ((val << shift) & mask);
> > > - writel(tmp, pcie->base + PCIE_RGR1_SW_INIT_1(pcie));
> > > + if (!pcie->bridge_reset) {
> > > + u32 tmp, mask = RGR1_SW_INIT_1_INIT_GENERIC_MASK;
> > > + u32 shift = RGR1_SW_INIT_1_INIT_GENERIC_SHIFT;
> > > +
> > > + tmp = readl(pcie->base + PCIE_RGR1_SW_INIT_1(pcie));
> > > + tmp = (tmp & ~mask) | ((val << shift) & mask);
> > > + writel(tmp, pcie->base + PCIE_RGR1_SW_INIT_1(pcie));
> > > + }
> >
> > This pattern looks goofy:
> >
> > reset_control_assert(pcie->bridge_reset);
> > if (!pcie->bridge_reset) {
> > ...
> >
> > If we're going to test pcie->bridge_reset at all, it should be first
> > so it's obvious what's going on and the reader doesn't have to go
> > verify that reset_control_assert() ignores and returns success for a
> > NULL pointer:
> >
> > if (pcie->bridge_reset) {
> > if (val)
> > reset_control_assert(pcie->bridge_reset);
> > else
> > reset_control_deassert(pcie->bridge_reset);
> >
> > return;
> > }
> >
> > u32 tmp, mask = RGR1_SW_INIT_1_INIT_GENERIC_MASK;
> > ...
> >
> Will do.
[...]
You will do what? If you don't mind me asking.
Krzysztof
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