[PATCH v5 4/9] PCI: dwc: Add host_start_link() & host_start_link() hooks for dwc glue drivers

[Krishna Chaitanya Chundru]

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@xxxxxxxxxxxxxxxx>
---
 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 56aafdbcdacaff6b738800fb03ae60eb13c9a0f2..f3f520d65c92ed5ceae5b33f0055c719a9b60f0e 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -466,6 +466,8 @@ 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 debugfs_info {
@@ -720,6 +722,20 @@ 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