serial: imx: Fill in rs485_supported
Add information on supported serial_rs485 features. In the case where RTS is lacking, RS485 cannot be enabled so provide zero rs485_supported for that case. Perhaps it would make sense to not provide rs485_config() at all in that case but such a change would have userspace visible impact/change in behavior so this patch does not attempt it. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://lore.kernel.org/r/20220606100433.13793-17-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
07481f448b
commit
00d7a00e2a
@ -2200,6 +2200,14 @@ static enum hrtimer_restart imx_trigger_stop_tx(struct hrtimer *t)
|
||||
return HRTIMER_NORESTART;
|
||||
}
|
||||
|
||||
static const struct serial_rs485 imx_no_rs485 = {}; /* No RS485 if no RTS */
|
||||
static const struct serial_rs485 imx_rs485_supported = {
|
||||
.flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND |
|
||||
SER_RS485_RX_DURING_TX,
|
||||
.delay_rts_before_send = 1,
|
||||
.delay_rts_after_send = 1,
|
||||
};
|
||||
|
||||
/* Default RX DMA buffer configuration */
|
||||
#define RX_DMA_PERIODS 16
|
||||
#define RX_DMA_PERIOD_LEN (PAGE_SIZE / 4)
|
||||
@ -2279,6 +2287,11 @@ static int imx_uart_probe(struct platform_device *pdev)
|
||||
sport->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_IMX_CONSOLE);
|
||||
sport->port.ops = &imx_uart_pops;
|
||||
sport->port.rs485_config = imx_uart_rs485_config;
|
||||
/* RTS is required to control the RS485 transmitter */
|
||||
if (sport->have_rtscts || sport->have_rtsgpio)
|
||||
sport->port.rs485_supported = &imx_rs485_supported;
|
||||
else
|
||||
sport->port.rs485_supported = &imx_no_rs485;
|
||||
sport->port.flags = UPF_BOOT_AUTOCONF;
|
||||
timer_setup(&sport->timer, imx_uart_timeout, 0);
|
||||
|
||||
|
Loading…
x
Reference in New Issue
Block a user