Add a custom constant for the ".bus_shit" initialiser to capture
a non-standard platform-specific ECAM bus shift value.
Standard values otherwise defined in the PCI Express Specification
are available in the include/linux/pci-ecam.h.
Suggested-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Signed-off-by: Krzysztof Wilczyński <kw@xxxxxxxxx>
---
drivers/pci/controller/pci-thunder-pem.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/controller/pci-thunder-pem.c b/drivers/pci/controller/pci-thunder-pem.c
index 3f847969143e..1a3f70ac61fc 100644
--- a/drivers/pci/controller/pci-thunder-pem.c
+++ b/drivers/pci/controller/pci-thunder-pem.c
@@ -19,6 +19,15 @@
#define PEM_CFG_WR 0x28
#define PEM_CFG_RD 0x30
+/*
+ * Enhanced Configuration Access Mechanism (ECAM)
+ *
+ * N.B. This is a non-standard platform-specific ECAM bus shift value. For
+ * standard values defined in the PCI Express Base Specification see
+ * include/linux/pci-ecam.h.
+ */
+#define THUNDER_PCIE_ECAM_BUS_SHIFT 24
+
struct thunder_pem_pci {
u32 ea_entry[3];
void __iomem *pem_reg_base;
@@ -404,7 +413,7 @@ static int thunder_pem_acpi_init(struct pci_config_window *cfg)
}
const struct pci_ecam_ops thunder_pem_ecam_ops = {
- .bus_shift = 24,
+ .bus_shift = THUNDER_PCIE_ECAM_BUS_SHIFT,
.init = thunder_pem_acpi_init,
.pci_ops = {
.map_bus = pci_ecam_map_bus,
@@ -441,7 +450,7 @@ static int thunder_pem_platform_init(struct pci_config_window *cfg)
}
static const struct pci_ecam_ops pci_thunder_pem_ops = {
- .bus_shift = 24,
+ .bus_shift = THUNDER_PCIE_ECAM_BUS_SHIFT,
.init = thunder_pem_platform_init,
.pci_ops = {
.map_bus = pci_ecam_map_bus,
--
2.29.2
