| Message ID | 20240628205430.24775-5-james.quinlan@broadcom.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | PCI: brcnstb: Enable STB 7712 SOC | expand |
Hi Jim, On Fr, 2024-06-28 at 16:54 -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> > --- > drivers/pci/controller/pcie-brcmstb.c | 20 ++++++++++++++++++++ > 1 file changed, 20 insertions(+) > > diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c > index 4104c3668fdb..0f1c3e1effb1 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; > + struct reset_control *swinit; > int num_memc; > u64 memc_size[PCIE_BRCM_MAX_MEMC]; > u32 hw_rev; > @@ -1626,6 +1627,25 @@ static int brcm_pcie_probe(struct platform_device *pdev) > dev_err(&pdev->dev, "could not enable clock\n"); > return ret; > } > + > + pcie->swinit = devm_reset_control_get_optional_exclusive(&pdev->dev, "swinit"); > + if (IS_ERR(pcie->swinit)) { > + ret = dev_err_probe(&pdev->dev, PTR_ERR(pcie->swinit), > + "failed to get 'swinit' reset\n"); > + goto clk_out; > + } > + > + ret = reset_control_assert(pcie->swinit); > + if (ret) { > + dev_err_probe(&pdev->dev, ret, "could not assert reset 'swinit'\n"); > + goto clk_out; > + } else { No need for an else branch here. > + ret = dev_err_probe(&pdev->dev, reset_control_deassert(pcie->swinit), > + "could not de-assert reset 'swinit' after asserting\n"); Please don't call dev_err_probe() when reset_control_deassert() returns 0. > + if (ret) > + goto clk_out; > + } > + > pcie->rescal = devm_reset_control_get_optional_shared(&pdev->dev, "rescal"); > if (IS_ERR(pcie->rescal)) { > ret = PTR_ERR(pcie->rescal); regards Philipp
On 6/28/24 23:54, 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> > --- > drivers/pci/controller/pcie-brcmstb.c | 20 ++++++++++++++++++++ > 1 file changed, 20 insertions(+) > > diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c > index 4104c3668fdb..0f1c3e1effb1 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; > + struct reset_control *swinit; > int num_memc; > u64 memc_size[PCIE_BRCM_MAX_MEMC]; > u32 hw_rev; > @@ -1626,6 +1627,25 @@ static int brcm_pcie_probe(struct platform_device *pdev) > dev_err(&pdev->dev, "could not enable clock\n"); > return ret; > } > + > + pcie->swinit = devm_reset_control_get_optional_exclusive(&pdev->dev, "swinit"); > + if (IS_ERR(pcie->swinit)) { > + ret = dev_err_probe(&pdev->dev, PTR_ERR(pcie->swinit), > + "failed to get 'swinit' reset\n"); > + goto clk_out; > + } > + > + ret = reset_control_assert(pcie->swinit); > + if (ret) { > + dev_err_probe(&pdev->dev, ret, "could not assert reset 'swinit'\n"); > + goto clk_out; > + } else { > + ret = dev_err_probe(&pdev->dev, reset_control_deassert(pcie->swinit), > + "could not de-assert reset 'swinit' after asserting\n"); > + if (ret) > + goto clk_out; > + } Could you move reset_control_assert() after get all resources. ~Stan > + > pcie->rescal = devm_reset_control_get_optional_shared(&pdev->dev, "rescal"); > if (IS_ERR(pcie->rescal)) { > ret = PTR_ERR(pcie->rescal);
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index 4104c3668fdb..0f1c3e1effb1 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; + struct reset_control *swinit; int num_memc; u64 memc_size[PCIE_BRCM_MAX_MEMC]; u32 hw_rev; @@ -1626,6 +1627,25 @@ static int brcm_pcie_probe(struct platform_device *pdev) dev_err(&pdev->dev, "could not enable clock\n"); return ret; } + + pcie->swinit = devm_reset_control_get_optional_exclusive(&pdev->dev, "swinit"); + if (IS_ERR(pcie->swinit)) { + ret = dev_err_probe(&pdev->dev, PTR_ERR(pcie->swinit), + "failed to get 'swinit' reset\n"); + goto clk_out; + } + + ret = reset_control_assert(pcie->swinit); + if (ret) { + dev_err_probe(&pdev->dev, ret, "could not assert reset 'swinit'\n"); + goto clk_out; + } else { + ret = dev_err_probe(&pdev->dev, reset_control_deassert(pcie->swinit), + "could not de-assert reset 'swinit' after asserting\n"); + if (ret) + goto clk_out; + } + pcie->rescal = devm_reset_control_get_optional_shared(&pdev->dev, "rescal"); if (IS_ERR(pcie->rescal)) { ret = PTR_ERR(pcie->rescal);
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 | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)