diff options
| author | Phil Elwell <phil@raspberrypi.org> | 2017-05-19 18:07:23 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-05-24 16:15:56 +0300 |
| commit | d087e7a991f1f61ee2c07db1be7c5cc2aa373f5d (patch) | |
| tree | 7d5fc11fbb19286d3294af2bb3e5214a2a6cdeec /drivers/tty/serial/8250/8250_bcm2835aux.c | |
| parent | 9b7becf103e2689d7f005895130ccf89a153fef1 (diff) | |
| download | linux-d087e7a991f1f61ee2c07db1be7c5cc2aa373f5d.tar.xz | |
serial: 8250: Add CAP_MINI, set for bcm2835aux
The AUX/mini-UART in the BCM2835 family of procesors is a cut-down
8250 clone. In particular it is lacking support for the following
features: CSTOPB PARENB PARODD CMSPAR CS5 CS6
Add a new capability (UART_CAP_MINI) that exposes the restrictions to
the user of the termios API by turning off the unsupported features in
the request.
N.B. It is almost possible to automatically discover the missing
features by reading back the LCR register, but the CSIZE bits don't
cooperate (contrary to the documentation, both bits are significant,
but CS5 and CS6 are mapped to CS7) and the code is much longer.
See: https://github.com/raspberrypi/linux/issues/1561
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
Acked-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/8250/8250_bcm2835aux.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_bcm2835aux.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/tty/serial/8250/8250_bcm2835aux.c b/drivers/tty/serial/8250/8250_bcm2835aux.c index e10f1244409b..a23c7da42ea8 100644 --- a/drivers/tty/serial/8250/8250_bcm2835aux.c +++ b/drivers/tty/serial/8250/8250_bcm2835aux.c @@ -39,7 +39,7 @@ static int bcm2835aux_serial_probe(struct platform_device *pdev) /* initialize data */ spin_lock_init(&data->uart.port.lock); - data->uart.capabilities = UART_CAP_FIFO; + data->uart.capabilities = UART_CAP_FIFO | UART_CAP_MINI; data->uart.port.dev = &pdev->dev; data->uart.port.regshift = 2; data->uart.port.type = PORT_16550; |