[PATCH 5.4 65/85] serial: 8250_pci: Enumerate Elkhart Lake UARTs via dedicated driver

Greg Kroah-Hartman
2021-08-10T17:39:51Z

From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

commit 7f0909db761535aefafa77031062603a71557267 upstream.

Elkhart Lake UARTs are PCI enumerated Synopsys DesignWare v4.0+ UART
integrated with Intel iDMA 32-bit DMA controller. There is a specific
driver to handle them, i.e. 8250_lpss. Hence, disable 8250_pci
enumeration for these UARTs.

Fixes: 1b91d97c66ef ("serial: 8250_lpss: Add ->setup() for Elkhart Lake ports")
Fixes: 4f912b898dc2 ("serial: 8250_lpss: Enable HS UART on Elkhart Lake")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210713101739.36962-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/tty/serial/8250/8250_pci.c | 6 ++++++
1 file changed, 6 insertions(+)

--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -3763,6 +3763,12 @@ static const struct pci_device_id blackl
{ PCI_VDEVICE(INTEL, 0x0f0c), },
{ PCI_VDEVICE(INTEL, 0x228a), },
{ PCI_VDEVICE(INTEL, 0x228c), },
+ { PCI_VDEVICE(INTEL, 0x4b96), },
+ { PCI_VDEVICE(INTEL, 0x4b97), },
+ { PCI_VDEVICE(INTEL, 0x4b98), },
+ { PCI_VDEVICE(INTEL, 0x4b99), },
+ { PCI_VDEVICE(INTEL, 0x4b9a), },
+ { PCI_VDEVICE(INTEL, 0x4b9b), },
{ PCI_VDEVICE(INTEL, 0x9ce3), },
{ PCI_VDEVICE(INTEL, 0x9ce4), },