USB: ftdi_sio: enable two UART ports on ST Microconnect Lite
The FT4232H used in the ST Micro Connect Lite has four hi-speed UART ports. The first two ports are reserved for the JTAG interface. We enable by default ports 2 and 3 as UARTs (where port 2 is a conventional RS-232 UART) Signed-off-by: Adrian Thomasset <adrian.thomasset@st.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -1789,20 +1789,24 @@ static int ftdi_8u2232c_probe(struct usb_serial *serial)
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}
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/*
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* First and second port on STMCLiteadaptors is reserved for JTAG interface
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* and the forth port for pio
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* First two ports on JTAG adaptors using an FT4232 such as STMicroelectronics's
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* ST Micro Connect Lite are reserved for JTAG or other non-UART interfaces and
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* can be accessed from userspace.
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* The next two ports are enabled as UARTs by default, where port 2 is
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* a conventional RS-232 UART.
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*/
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static int ftdi_stmclite_probe(struct usb_serial *serial)
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{
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struct usb_device *udev = serial->dev;
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struct usb_interface *interface = serial->interface;
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if (interface == udev->actconfig->interface[2])
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return 0;
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if (interface == udev->actconfig->interface[0] ||
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interface == udev->actconfig->interface[1]) {
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dev_info(&udev->dev, "Ignoring serial port reserved for JTAG\n");
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return -ENODEV;
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}
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dev_info(&udev->dev, "Ignoring serial port reserved for JTAG\n");
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return -ENODEV;
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return 0;
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}
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/*
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