[PATCH v4 04/10] PCI: dwc: Add host_start_link() & host_start_link() hooks for dwc glue drivers

Krishna Chaitanya Chundru
2025-02-25T09:34:55Z

Add host_start_link() and host_stop_link() functions to dwc glue drivers to
register with start_link() and stop_link() of pci ops, allowing for better
control over the link initialization and shutdown process.

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
---
drivers/pci/controller/dwc/pcie-designware.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index 501d9ddfea16..47f34dd12c39 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -435,6 +435,8 @@ struct dw_pcie_ops {
enum dw_pcie_ltssm (*get_ltssm)(struct dw_pcie *pcie);
int (*start_link)(struct dw_pcie *pcie);
void (*stop_link)(struct dw_pcie *pcie);
+ int (*host_start_link)(struct dw_pcie *pcie);
+ void (*host_stop_link)(struct dw_pcie *pcie);
};

struct dw_pcie {
@@ -664,6 +666,20 @@ static inline void dw_pcie_stop_link(struct dw_pcie *pci)
pci->ops->stop_link(pci);
}

+static inline int dw_pcie_host_start_link(struct dw_pcie *pci)
+{
+ if (pci->ops && pci->ops->host_start_link)
+ return pci->ops->host_start_link(pci);
+
+ return 0;
+}
+
+static inline void dw_pcie_host_stop_link(struct dw_pcie *pci)
+{
+ if (pci->ops && pci->ops->host_stop_link)
+ pci->ops->host_stop_link(pci);
+}
+
static inline enum dw_pcie_ltssm dw_pcie_get_ltssm(struct dw_pcie *pci)
{
u32 val;

--
2.34.1