From b3b708fa2780cd2b5d8266a8f0c3a1cab364d4d2 Mon Sep 17 00:00:00 2001 From: Guennadi Liakhovetski Date: Tue, 16 Oct 2007 01:24:02 -0700 Subject: wake up from a serial port Enable wakeup from serial ports, make it run-time configurable over sysfs, e.g., echo enabled > /sys/devices/platform/serial8250.0/tty/ttyS0/power/wakeup Requires # CONFIG_SYSFS_DEPRECATED is not set Following suggestions from Alan and Russell moved the may_wake_up checks to serial_core.c. This time actually tested - it does even work. Could someone, please, verify, that put_device after device_find_child is correct? Also would be nice to test with a Natsemi UART, that can wake up the system, if such systems exist. For this you just have to apply the patch below, issue the above "echo" command to one of your Natsemi port, suspend and resume your system, and verify that your Natsemi port still works. If you are actually capable of waking up the system from that port, would be nice to test that as well. Signed-off-by: Guennadi Liakhovetski Cc: Alan Cox Cc: Russell King Cc: Kay Sievers Cc: Greg KH Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/serial_core.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include/linux/serial_core.h') diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 09d17b06bf0..4db77249281 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -291,7 +291,8 @@ struct uart_port { resource_size_t mapbase; /* for ioremap */ struct device *dev; /* parent device */ unsigned char hub6; /* this should be in the 8250 driver */ - unsigned char unused[3]; + unsigned char suspended; + unsigned char unused[2]; void *private_data; /* generic platform data pointer */ }; -- cgit v1.2.3