diff options
| author | Adrian Thomasset <adrian.thomasset@st.com> | 2013-04-24 11:37:35 +0100 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-05-13 15:02:25 +0100 |
| commit | ae04c6d22a958d4879c4139ea57dee8a92243e42 (patch) | |
| tree | 9b73634ed51d8de19d2cc154100cf78b5909e94c | |
| parent | 19e7fbbc440d0f29605e74252b42f2428434200c (diff) | |
USB: ftdi_sio: enable two UART ports on ST Microconnect Lite
commit 71d9a2b95fc9c9474d46d764336efd7a5a805555 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/usb/serial/ftdi_sio.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index d34df4bcc314..51d1712496ef 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -1819,8 +1819,11 @@ static int ftdi_8u2232c_probe(struct usb_serial *serial) } /* - * First and second port on STMCLiteadaptors is reserved for JTAG interface - * and the forth port for pio + * First two ports on JTAG adaptors using an FT4232 such as STMicroelectronics's + * ST Micro Connect Lite are reserved for JTAG or other non-UART interfaces and + * can be accessed from userspace. + * The next two ports are enabled as UARTs by default, where port 2 is + * a conventional RS-232 UART. */ static int ftdi_stmclite_probe(struct usb_serial *serial) { @@ -1829,12 +1832,13 @@ static int ftdi_stmclite_probe(struct usb_serial *serial) dbg("%s", __func__); - if (interface == udev->actconfig->interface[2]) - return 0; - - dev_info(&udev->dev, "Ignoring serial port reserved for JTAG\n"); + if (interface == udev->actconfig->interface[0] || + interface == udev->actconfig->interface[1]) { + dev_info(&udev->dev, "Ignoring serial port reserved for JTAG\n"); + return -ENODEV; + } - return -ENODEV; + return 0; } /* |