From 43ee34131cedca95c413b5e6203f4545309d2450 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Ilpo=20J=C3=A4rvinen?= <ilpo.jarvinen@linux.intel.com>
Date: Mon, 6 Jun 2022 13:04:01 +0300
Subject: [PATCH] serial: 8250: Create serial8250_em485_supported for em485
users
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Create serial8250_em485_supported for the serial_rs485 features
supported by the em485 framework.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220606100433.13793-5-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/tty/serial/8250/8250.h | 1 +
drivers/tty/serial/8250/8250_port.c | 8 ++++++++
2 files changed, 9 insertions(+)
diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h
index c89cb881d9b04..b120da57c61f9 100644
--- a/drivers/tty/serial/8250/8250.h
+++ b/drivers/tty/serial/8250/8250.h
@@ -207,6 +207,7 @@ int serial8250_em485_config(struct uart_port *port, struct serial_rs485 *rs485);
void serial8250_em485_start_tx(struct uart_8250_port *p);
void serial8250_em485_stop_tx(struct uart_8250_port *p);
void serial8250_em485_destroy(struct uart_8250_port *p);
+extern struct serial_rs485 serial8250_em485_supported;
/* MCR <-> TIOCM conversion */
static inline int serial8250_TIOCM_to_MCR(int tiocm)
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index af550a4a27f89..65a60e4808ea6 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -647,6 +647,14 @@ void serial8250_em485_destroy(struct uart_8250_port *p)
}
EXPORT_SYMBOL_GPL(serial8250_em485_destroy);
+struct serial_rs485 serial8250_em485_supported = {
+ .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND |
+ SER_RS485_TERMINATE_BUS | SER_RS485_RX_DURING_TX,
+ .delay_rts_before_send = 1,
+ .delay_rts_after_send = 1,
+};
+EXPORT_SYMBOL_GPL(serial8250_em485_supported);
+
/**
* serial8250_em485_config() - generic ->rs485_config() callback
* @port: uart port
--
2.30.2