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| author |   Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2022-06-06 13:04:10 +0300 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-10 13:49:25 +0200 |
| commit | e849145e1fdd2d6d7bde26a5b3dbfd11567ce071 (patch) | |
| tree | 0660e6b9c7537ed9b7d1dbc32d02795a2da51c91 /drivers/tty/serial/ar933x_uart.c | |
| parent | serial: pl011: Fill in rs485_supported (diff) | |
| download | linux-dev-e849145e1fdd2d6d7bde26a5b3dbfd11567ce071.tar.xz linux-dev-e849145e1fdd2d6d7bde26a5b3dbfd11567ce071.zip | |
serial: ar933x: 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/20220606100433.13793-14-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/ar933x_uart.c')
| -rw-r--r-- | drivers/tty/serial/ar933x_uart.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c index 6269dbf93546..ab2c5b2a1ce8 100644 --- a/drivers/tty/serial/ar933x_uart.c +++ b/drivers/tty/serial/ar933x_uart.c @@ -702,6 +702,11 @@ static struct uart_driver ar933x_uart_driver = { .cons = NULL, /* filled in runtime */ }; +static const struct serial_rs485 ar933x_no_rs485 = {}; +static const struct serial_rs485 ar933x_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND, +}; + static int ar933x_uart_probe(struct platform_device *pdev) { struct ar933x_uart_port *up; @@ -773,6 +778,7 @@ static int ar933x_uart_probe(struct platform_device *pdev) port->fifosize = AR933X_UART_FIFO_SIZE; port->ops = &ar933x_uart_ops; port->rs485_config = ar933x_config_rs485; + port->rs485_supported = &ar933x_rs485_supported; baud = ar933x_uart_get_baud(port->uartclk, AR933X_UART_MAX_SCALE, 1); up->min_baud = max_t(unsigned int, baud, AR933X_UART_MIN_BAUD); @@ -796,6 +802,7 @@ static int ar933x_uart_probe(struct platform_device *pdev) !up->rts_gpiod) { dev_err(&pdev->dev, "lacking rts-gpio, disabling RS485\n"); port->rs485.flags &= ~SER_RS485_ENABLED; + port->rs485_supported = &ar933x_no_rs485; } #ifdef CONFIG_SERIAL_AR933X_CONSOLE |