Add CONSOLE_POLL support for future KGDB porting.
Signed-off-by: Vincent Chen <vincent.chen@xxxxxxxxxx>
Changes since v1:
1. Fix the compile error reported by kbuild test robot
---
drivers/tty/serial/sifive.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/drivers/tty/serial/sifive.c b/drivers/tty/serial/sifive.c
index d5f81b98e4d7..f46b5dba0661 100644
--- a/drivers/tty/serial/sifive.c
+++ b/drivers/tty/serial/sifive.c
@@ -709,6 +709,29 @@ static const char *sifive_serial_type(struct uart_port *port)
return port->type == PORT_SIFIVE_V0 ? "SiFive UART v0" : NULL;
}
+#ifdef CONFIG_CONSOLE_POLL
+static int sifive_serial_poll_get_char(struct uart_port *port)
+{
+ struct sifive_serial_port *ssp = port_to_sifive_serial_port(port);
+ char is_empty, ch;
+
+ ch = __ssp_receive_char(ssp, &is_empty);
+ if (is_empty)
+ return NO_POLL_CHAR;
+
+ return ch;
+}
+
+static void sifive_serial_poll_put_char(struct uart_port *port,
+ unsigned char c)
+{
+ struct sifive_serial_port *ssp = port_to_sifive_serial_port(port);
+
+ __ssp_wait_for_xmitr(ssp);
+ __ssp_transmit_char(ssp, c);
+}
+#endif /* CONFIG_CONSOLE_POLL */
+
/*
* Early console support
*/
@@ -877,6 +900,10 @@ static const struct uart_ops sifive_serial_uops = {
.request_port = sifive_serial_request_port,
.config_port = sifive_serial_config_port,
.verify_port = sifive_serial_verify_port,
+#ifdef CONFIG_CONSOLE_POLL
+ .poll_get_char = sifive_serial_poll_get_char,
+ .poll_put_char = sifive_serial_poll_put_char,
+#endif
};
static struct uart_driver sifive_serial_uart_driver = {
--
2.7.4
