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serial: 8250_pci1xxxx: Add driver for quad-uart support

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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 driver loads for the quad-uart and
enumerates single or multiple instances of uart based on the PCIe
subsystem device ID.

Co-developed-by: Tharun Kumar P <tharunkumar.pasumarthi@microchip.com>
Signed-off-by: Tharun Kumar P <tharunkumar.pasumarthi@microchip.com>
Signed-off-by: Kumaravel Thiagarajan <kumaravel.thiagarajan@microchip.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230207164814.3104605-3-kumaravel.thiagarajan@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kumaravel Thiagarajan
2023-02-07 22:18:12 +05:30
committed by Greg Kroah-Hartman
parent 0348386dab
commit 32bb477fa7
6 changed files with 359 additions and 0 deletions
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include/uapi/linux/serial_core.h
+3
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@@ -207,6 +207,9 @@
/* Atheros AR933X SoC */
#define PORT_AR933X 99
/* MCHP 16550A UART with 256 byte FIFOs */
#define PORT_MCHP16550A 100
/* ARC (Synopsys) on-chip UART */
#define PORT_ARC 101