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PCI: dwc: ep: Use FIELD_GET() where applicable

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Use FIELD_GET() to simplify the code extracting the register values. No
functional change intended.

Signed-off-by: Hans Zhang <18255117159@163.com>
[mani: commit message fixup]
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Link: https://patch.msgid.link/20250428124230.112648-1-18255117159@163.com
This commit is contained in:
Hans Zhang 2025-04-28 20:42:30 +08:00 committed by Manivannan Sadhasivam
parent 0af2f6be1b
commit 2612378d44
1 changed files with 4 additions and 5 deletions
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9
drivers/pci/controller/dwc/pcie-designware-ep.c
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@ -256,11 +256,11 @@ static unsigned int dw_pcie_ep_get_rebar_offset(struct dw_pcie *pci,
return offset;
reg = dw_pcie_readl_dbi(pci, offset + PCI_REBAR_CTRL);
nbars = (reg & PCI_REBAR_CTRL_NBAR_MASK) >> PCI_REBAR_CTRL_NBAR_SHIFT;
nbars = FIELD_GET(PCI_REBAR_CTRL_NBAR_MASK, reg);
for (i = 0; i < nbars; i++, offset += PCI_REBAR_CTRL) {
reg = dw_pcie_readl_dbi(pci, offset + PCI_REBAR_CTRL);
bar_index = reg & PCI_REBAR_CTRL_BAR_IDX;
bar_index = FIELD_GET(PCI_REBAR_CTRL_BAR_IDX, reg);
if (bar_index == bar)
return offset;
}
@ -875,8 +875,7 @@ static void dw_pcie_ep_init_non_sticky_registers(struct dw_pcie *pci)
if (offset) {
reg = dw_pcie_readl_dbi(pci, offset + PCI_REBAR_CTRL);
nbars = (reg & PCI_REBAR_CTRL_NBAR_MASK) >>
PCI_REBAR_CTRL_NBAR_SHIFT;
nbars = FIELD_GET(PCI_REBAR_CTRL_NBAR_MASK, reg);
/*
* PCIe r6.0, sec 7.8.6.2 require us to support at least one
@ -897,7 +896,7 @@ static void dw_pcie_ep_init_non_sticky_registers(struct dw_pcie *pci)
* is why RESBAR_CAP_REG is written here.
*/
val = dw_pcie_readl_dbi(pci, offset + PCI_REBAR_CTRL);
bar = val & PCI_REBAR_CTRL_BAR_IDX;
bar = FIELD_GET(PCI_REBAR_CTRL_BAR_IDX, val);
if (ep->epf_bar[bar])
pci_epc_bar_size_to_rebar_cap(ep->epf_bar[bar]->size, &val);
else