| Message ID | 20240716213131.6036-5-james.quinlan@broadcom.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | PCI: brcnstb: Enable STB 7712 SOC | expand |
On Tue, Jul 16, 2024 at 05:31:19PM -0400, Jim Quinlan wrote: > The 7712 SOC has a bridge reset which can be described in the device tree. > If it is present, use it. Otherwise, continue to use the legacy method to > reset the bridge. > > Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com> > Reviewed-by: Stanimir Varbanov <svarbanov@suse.de> > Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com> > --- > drivers/pci/controller/pcie-brcmstb.c | 22 +++++++++++++++++----- > 1 file changed, 17 insertions(+), 5 deletions(-) > > diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c > index c257434edc08..92816d8d215a 100644 > --- a/drivers/pci/controller/pcie-brcmstb.c > +++ b/drivers/pci/controller/pcie-brcmstb.c > @@ -265,6 +265,7 @@ struct brcm_pcie { > enum pcie_type type; > struct reset_control *rescal; > struct reset_control *perst_reset; > + struct reset_control *bridge; 'bridge' is an opaque name. Use something like 'bridge_reset'. > int num_memc; > u64 memc_size[PCIE_BRCM_MAX_MEMC]; > u32 hw_rev; > @@ -732,12 +733,19 @@ static void __iomem *brcm7425_pcie_map_bus(struct pci_bus *bus, > > 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 (pcie->bridge) { > + if (val) > + reset_control_assert(pcie->bridge); > + else > + reset_control_deassert(pcie->bridge); Well, these APIs will bail out if the reset_control pointer is NULL. So you can just call them directly instead of if..else condition. - Mani
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index c257434edc08..92816d8d215a 100644 --- a/drivers/pci/controller/pcie-brcmstb.c +++ b/drivers/pci/controller/pcie-brcmstb.c @@ -265,6 +265,7 @@ struct brcm_pcie { enum pcie_type type; struct reset_control *rescal; struct reset_control *perst_reset; + struct reset_control *bridge; int num_memc; u64 memc_size[PCIE_BRCM_MAX_MEMC]; u32 hw_rev; @@ -732,12 +733,19 @@ static void __iomem *brcm7425_pcie_map_bus(struct pci_bus *bus, 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 (pcie->bridge) { + if (val) + reset_control_assert(pcie->bridge); + else + reset_control_deassert(pcie->bridge); + } else { + 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)); + 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)); + } } static void brcm_pcie_bridge_sw_init_set_7278(struct brcm_pcie *pcie, u32 val) @@ -1621,6 +1629,10 @@ static int brcm_pcie_probe(struct platform_device *pdev) if (IS_ERR(pcie->perst_reset)) return PTR_ERR(pcie->perst_reset); + pcie->bridge = devm_reset_control_get_optional_exclusive(&pdev->dev, "bridge"); + if (IS_ERR(pcie->bridge)) + return PTR_ERR(pcie->bridge); + ret = clk_prepare_enable(pcie->clk); if (ret) { dev_err(&pdev->dev, "could not enable clock\n");