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authorDaniel Thompson <daniel.thompson@linaro.org>2018-01-01 13:05:19 +0000
committerDaniel Thompson <daniel.thompson@linaro.org>2018-01-01 13:05:19 +0000
commit8dc8adfab78a11d577c6e982dfd88e1c2f27d03d (patch)
treea1a8edae53f049c32d7ead507888111ac1ffd634
parentf1005945c613077fe682e55396a4a8c1d32c784b (diff)
downloadlinux-8dc8adfab78a11d577c6e982dfd88e1c2f27d03d.tar.gz
serial: 8250: Implement the "polled" request_irq() interface
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
-rw-r--r--drivers/tty/serial/8250/8250_port.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index f0cc04f62b67..6754f5d8a863 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -2121,6 +2121,21 @@ static void serial8250_put_poll_char(struct uart_port *port,
serial8250_rpm_put(up);
}
+static int serial8250_get_poll_irq(struct uart_port *port)
+{
+ unsigned int ier;
+ struct uart_8250_port *up = up_to_u8250p(port);
+
+ serial8250_rpm_get(up);
+
+ ier = serial_port_in(port, UART_IER);
+ ier |= UART_IER_RLSI | UART_IER_RDI;
+ serial_port_out(port, UART_IER, ier);
+
+ serial8250_rpm_put(up);
+ return port->irq;
+}
+
#endif /* CONFIG_CONSOLE_POLL */
int serial8250_do_startup(struct uart_port *port)
@@ -3124,6 +3139,7 @@ static const struct uart_ops serial8250_pops = {
#ifdef CONFIG_CONSOLE_POLL
.poll_get_char = serial8250_get_poll_char,
.poll_put_char = serial8250_put_poll_char,
+ .poll_get_irq = serial8250_get_poll_irq,
#endif
};