[PATCH 09/13] PCI: brcmstb: Declare and assign quirk EARLY_PERST_ASSERT
From: Jim Quinlan
Date: Fri Sep 11 2026 - 19:41:42 EST
Declare and assign a quirk where PERST# must be asserted prior to an
internal bus being turned on.
Signed-off-by: Jim Quinlan <james.quinlan@xxxxxxxxxxxx>
---
drivers/pci/controller/pcie-brcmstb.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
index e2284e114241..dfd703571091 100644
--- a/drivers/pci/controller/pcie-brcmstb.c
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -296,6 +296,8 @@ struct inbound_win {
#define CFG_QUIRK_32BIT_PCI_OPS BIT(3)
/* PCIe HW does not have an internal bus timer */
#define CFG_QUIRK_NO_RGR1_TIMER BIT(4)
+/* PCIe PERST# must be asserted before internal bridge turned on */
+#define CFG_QUIRK_EARLY_PERST_ASSERT BIT(5)
/* FLAGS */
#define BFLAG(pcie, flag) ((pcie)->cfg->flags & CFG_FLG_ ## flag)
@@ -1159,8 +1161,8 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie)
if (ret)
return ret;
- /* Ensure that PERST# is asserted; some bootloaders may deassert it. */
- if (pcie->cfg->soc_base == BCM2711) {
+ if (BQUIRK(pcie, EARLY_PERST_ASSERT)) {
+ /* Ensure that PERST# is asserted; some bootloaders may deassert it. */
ret = pcie->cfg->perst_set(pcie, 1);
if (ret) {
pcie->cfg->bridge_sw_init_set(pcie, 0);
@@ -1965,6 +1967,7 @@ static const struct pcie_cfg_data bcm2711_cfg = {
.perst_set = brcm_pcie_perst_set_generic,
.bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic,
.num_inbound_wins = 3,
+ .quirks = CFG_QUIRK_EARLY_PERST_ASSERT,
};
static const struct pcie_cfg_data bcm2712_cfg = {
--
2.34.1