diff mbox series

[v2,09/10] PCI: Add function to convert lnkctl2speed to pci_bus_speed

Message ID 20250313-mhi_bw_up-v2-9-869ca32170bf@oss.qualcomm.com
State New
Headers show
Series bus: mhi: host: Add support for mhi bus bw | expand

Commit Message

Krishna Chaitanya Chundru March 13, 2025, 11:40 a.m. UTC 
Add a exported function to convert lnkctl2speed to enum pci_bus_speed,
so that other kernel drivers can use it.

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
---
 drivers/pci/pci.c   | 12 ++++++++++++
 include/linux/pci.h |  1 +
 2 files changed, 13 insertions(+)
diff mbox series

Patch

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 869d204a70a3..75505437a9c9 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -6011,6 +6011,18 @@  int pcie_link_speed_mbps(struct pci_dev *pdev)
 }
 EXPORT_SYMBOL(pcie_link_speed_mbps);
 
+/**
+ * pci_lnkctl2_bus_speed - converts lnkctl2 speed to pci_bus_speed
+ * @speed: LNKCAP2 SLS value
+ *
+ * Returns pci_bus_speed
+ */
+enum pci_bus_speed pci_lnkctl2_bus_speed(int speed)
+{
+	return pcie_link_speed[speed];
+}
+EXPORT_SYMBOL(pci_lnkctl2_bus_speed);
+
 /**
  * pcie_bandwidth_available - determine minimum link settings of a PCIe
  *			      device and its bandwidth limitation
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 9ae199c1e698..b84473f228c8 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1653,6 +1653,7 @@  unsigned char pci_bus_max_busnr(struct pci_bus *bus);
 void pci_setup_bridge(struct pci_bus *bus);
 resource_size_t pcibios_window_alignment(struct pci_bus *bus,
 					 unsigned long type);
+enum pci_bus_speed pci_lnkctl2_bus_speed(int speed);
 
 #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
 #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)