| Message ID | 20240815225731.40276-7-james.quinlan@broadcom.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | PCI: brcnstb: Enable STB 7712 SOC | expand |
On Thu, Aug 15, 2024 at 06:57:19PM -0400, Jim Quinlan wrote: > The 7712 SOC adds a software init reset device for the PCIe HW. > If found in the DT node, use it. > > Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> - Mani > --- > drivers/pci/controller/pcie-brcmstb.c | 24 ++++++++++++++++++++++++ > 1 file changed, 24 insertions(+) > > diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c > index af14debd81d0..aa21c4c7b7f7 100644 > --- a/drivers/pci/controller/pcie-brcmstb.c > +++ b/drivers/pci/controller/pcie-brcmstb.c > @@ -266,6 +266,7 @@ struct brcm_pcie { > struct reset_control *rescal; > struct reset_control *perst_reset; > struct reset_control *bridge_reset; > + struct reset_control *swinit_reset; > int num_memc; > u64 memc_size[PCIE_BRCM_MAX_MEMC]; > u32 hw_rev; > @@ -1633,12 +1634,35 @@ static int brcm_pcie_probe(struct platform_device *pdev) > if (IS_ERR(pcie->bridge_reset)) > return PTR_ERR(pcie->bridge_reset); > > + pcie->swinit_reset = devm_reset_control_get_optional_exclusive(&pdev->dev, "swinit"); > + if (IS_ERR(pcie->swinit_reset)) > + return PTR_ERR(pcie->swinit_reset); > + > ret = clk_prepare_enable(pcie->clk); > if (ret) > return dev_err_probe(&pdev->dev, ret, "could not enable clock\n"); > > pcie->bridge_sw_init_set(pcie, 0); > > + if (pcie->swinit_reset) { > + ret = reset_control_assert(pcie->swinit_reset); > + if (ret) { > + clk_disable_unprepare(pcie->clk); > + return dev_err_probe(&pdev->dev, ret, > + "could not assert reset 'swinit'\n"); > + } > + > + /* HW team recommends 1us for proper sync and propagation of reset */ > + udelay(1); > + > + ret = reset_control_deassert(pcie->swinit_reset); > + if (ret) { > + clk_disable_unprepare(pcie->clk); > + return dev_err_probe(&pdev->dev, ret, > + "could not de-assert reset 'swinit'\n"); > + } > + } > + > ret = reset_control_reset(pcie->rescal); > if (ret) { > clk_disable_unprepare(pcie->clk); > -- > 2.17.1 >
On 8/15/24 15:57, Jim Quinlan wrote: > The 7712 SOC adds a software init reset device for the PCIe HW. > If found in the DT node, use it. > > Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index af14debd81d0..aa21c4c7b7f7 100644 --- a/drivers/pci/controller/pcie-brcmstb.c +++ b/drivers/pci/controller/pcie-brcmstb.c @@ -266,6 +266,7 @@ struct brcm_pcie { struct reset_control *rescal; struct reset_control *perst_reset; struct reset_control *bridge_reset; + struct reset_control *swinit_reset; int num_memc; u64 memc_size[PCIE_BRCM_MAX_MEMC]; u32 hw_rev; @@ -1633,12 +1634,35 @@ static int brcm_pcie_probe(struct platform_device *pdev) if (IS_ERR(pcie->bridge_reset)) return PTR_ERR(pcie->bridge_reset); + pcie->swinit_reset = devm_reset_control_get_optional_exclusive(&pdev->dev, "swinit"); + if (IS_ERR(pcie->swinit_reset)) + return PTR_ERR(pcie->swinit_reset); + ret = clk_prepare_enable(pcie->clk); if (ret) return dev_err_probe(&pdev->dev, ret, "could not enable clock\n"); pcie->bridge_sw_init_set(pcie, 0); + if (pcie->swinit_reset) { + ret = reset_control_assert(pcie->swinit_reset); + if (ret) { + clk_disable_unprepare(pcie->clk); + return dev_err_probe(&pdev->dev, ret, + "could not assert reset 'swinit'\n"); + } + + /* HW team recommends 1us for proper sync and propagation of reset */ + udelay(1); + + ret = reset_control_deassert(pcie->swinit_reset); + if (ret) { + clk_disable_unprepare(pcie->clk); + return dev_err_probe(&pdev->dev, ret, + "could not de-assert reset 'swinit'\n"); + } + } + ret = reset_control_reset(pcie->rescal); if (ret) { clk_disable_unprepare(pcie->clk);
The 7712 SOC adds a software init reset device for the PCIe HW. If found in the DT node, use it. Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com> --- drivers/pci/controller/pcie-brcmstb.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)