pci1xxxx is a PCIe switch with a multi-function endpoint on one of its downstream ports. Quad-uart is one of the functions in the multi-function endpoint. This patch adds device driver for the quad-uart function and enumerates between 1 to 4 instances of uarts based on the PCIe subsystem device ID. Kumaravel Thiagarajan (2): 8250: microchip: pci1xxxx: Add driver for the quad-uart function in the multi-function endpoint of pci1xxxx device. 8250: microchip: pci1xxxx: Add power management functions to pci1xxxx's quad-uart driver. MAINTAINERS | 6 + drivers/tty/serial/8250/8250_pci1xxxx.c | 585 ++++++++++++++++++++++++ drivers/tty/serial/8250/8250_port.c | 8 + drivers/tty/serial/8250/Kconfig | 9 + drivers/tty/serial/8250/Makefile | 1 + include/uapi/linux/serial_core.h | 3 + 6 files changed, 612 insertions(+) create mode 100644 drivers/tty/serial/8250/8250_pci1xxxx.c -- 2.25.1