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| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2018-01-25 14:30:45 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-28 13:30:09 +0100 |
| commit | eefadcbca7f394fb9248384f2c759ebbe81e20c7 (patch) | |
| tree | 189526ccec551d899566c00164d504760dd8da0f /drivers/tty/serial/max310x.c | |
| parent | serial: altera: don't enable any irq if the device doesn't feature an irq (diff) | |
| download | linux-eefadcbca7f394fb9248384f2c759ebbe81e20c7.tar.xz linux-eefadcbca7f394fb9248384f2c759ebbe81e20c7.zip | |
serial: altera: set RRDY flag also without irq
The UART can be operated without an irq. In this case a timer is setup
that regularily calls altera_uart_interrupt(). The receiving part
depends on pp->imr having the bit ALTERA_UART_STATUS_RRDY_MSK set,
otherwise altera_uart_rx_chars() is never called. So ensure that the bit
gets set (disguised as ALTERA_UART_CONTROL_RRDY_MSK) by not returning
early from altera_uart_startup() if port->irq is 0.
This doesn't affect the hardware as the ALTERA_UART_CONTROL_RRDY_MSK bit
isn't actually written to the control register.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/max310x.c')
0 files changed, 0 insertions, 0 deletions