Since serial_core now does not make serial ports wake-up capable by
default, add a parameter to support this feature in the 8250 UART.
This is the only UART where I think this feature is useful.
Signed-off-by: Simon Glass <sjg@xxxxxxxxxxxx>
---
drivers/tty/serial/8250.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c
index 54f8920..78feee4 100644
--- a/drivers/tty/serial/8250.c
+++ b/drivers/tty/serial/8250.c
@@ -65,6 +65,7 @@ static int serial_index(struct uart_port *port)
}
static unsigned int skip_txen_test; /* force skip of txen test at init time */
+static unsigned int wakeup_capable; /* device can wake up system */
/*
* Debugging.
@@ -2786,6 +2787,7 @@ serial8250_register_ports(struct uart_driver *drv, struct device *dev)
if (up->port.flags & UPF_FIXED_TYPE)
serial8250_init_fixed_type_port(up, up->port.type);
+ up->port.wakeup_capable = wakeup_capable;
uart_add_one_port(drv, &up->port);
}
@@ -3219,6 +3221,7 @@ int serial8250_register_port(struct uart_port *port)
uart->port.set_termios = port->set_termios;
if (port->pm)
uart->port.pm = port->pm;
+ uart->port.wakeup_capable = wakeup_capable;
if (serial8250_isa_config != NULL)
serial8250_isa_config(0, &uart->port,
@@ -3252,6 +3255,7 @@ void serial8250_unregister_port(int line)
uart->port.type = PORT_UNKNOWN;
uart->port.dev = &serial8250_isa_devs->dev;
uart->capabilities = uart_config[uart->port.type].flags;
+ uart->port.wakeup_capable = wakeup_capable;
uart_add_one_port(&serial8250_reg, &uart->port);
} else {
uart->port.dev = NULL;
@@ -3355,3 +3359,6 @@ module_param_array(probe_rsa, ulong, &probe_rsa_count, 0444);
MODULE_PARM_DESC(probe_rsa, "Probe I/O ports for RSA");
#endif
MODULE_ALIAS_CHARDEV_MAJOR(TTY_MAJOR);
+
+module_param(wakeup_capable, uint, 0644);
+MODULE_PARM_DESC(wakeup_capable, "Allow driver to wake up the system");
--
1.7.7.3
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