[PATCH v4 05/10] PCI: dwc: Implement .start_link(), .stop_link() hooks

Krishna Chaitanya Chundru
2025-02-25T09:35:01Z

Implement stop_link() and start_link() function op for dwc drivers.

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
---
drivers/pci/controller/dwc/pcie-designware-host.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index ffaded8f2df7..2d3ec61e8dfa 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -697,10 +697,28 @@ void __iomem *dw_pcie_own_conf_map_bus(struct pci_bus *bus, unsigned int devfn,
}
EXPORT_SYMBOL_GPL(dw_pcie_own_conf_map_bus);

+static int dw_pcie_op_start_link(struct pci_bus *bus)
+{
+ struct dw_pcie_rp *pp = bus->sysdata;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
+ return dw_pcie_host_start_link(pci);
+}
+
+static void dw_pcie_op_stop_link(struct pci_bus *bus)
+{
+ struct dw_pcie_rp *pp = bus->sysdata;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
+ dw_pcie_host_stop_link(pci);
+}
+
static struct pci_ops dw_pcie_ops = {
.map_bus = dw_pcie_own_conf_map_bus,
.read = pci_generic_config_read,
.write = pci_generic_config_write,
+ .start_link = dw_pcie_op_start_link,
+ .stop_link = dw_pcie_op_stop_link,
};

static int dw_pcie_iatu_setup(struct dw_pcie_rp *pp)

--
2.34.1