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 --- drivers/pci/pci.c | 15 +++++++++++++++ include/linux/pci.h | 1 + 2 files changed, 16 insertions(+) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 77b17b13ee61..cda7d210ddbf 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -5939,6 +5939,21 @@ int pcie_link_speed_mbps(struct pci_dev *pdev) } EXPORT_SYMBOL(pcie_link_speed_mbps); +/** + * pci_lnkctl2_bus_speed - convert Link Control 2 Target Link Speed to pci_bus_speed + * @speed: Target Link Speed (TLS) value from Link Control 2 register (0-4 for Gen1-Gen5) + * + * Convert the Target Link Speed (TLS) field value from the Link Control 2 register + * to the corresponding enum pci_bus_speed. + * + * Return: pci_bus_speed corresponding to the TLS value + */ +enum pci_bus_speed pci_lnkctl2_bus_speed(u32 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 d1f2d382189d..244c145af04f 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1727,6 +1727,7 @@ int pci_cfg_space_size(struct pci_dev *dev); unsigned char pci_bus_max_busnr(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(u32 speed); #define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0) #define PCI_VGA_STATE_CHANGE_DECODES (1 << 1) -- 2.34.1