'0' indicates the device is on. Other values (1-3) indicate the device is in a low power state. You can see ACPI's spec. -----Original Message----- From: linux-pm-bounces@xxxxxxxxxxxxxx [mailto:linux-pm-bounces@xxxxxxxxxxxxxx] On Behalf Of Tehn Yit Chin Sent: Tuesday, March 07, 2006 9:30 AM To: Tehn Yit Chin Cc: linux-pm@xxxxxxxxxxxxxx Subject: Re: [linux-pm] apm for individual devices Tehn Yit Chin wrote: > Hi all, > > How does one use the sysfs entry of power/state that I can find for > each registered device? Eg, for the i2c device on my s3c2410 cpu, I > find the following entry, > > /sys/devices/platform/s3c2410-i2c/power/state > > I tried echoing "mem" into it, but nothing seems to happen. > > What I am looking for is a way of suspending and resuming individual > devices within the PM architecture? > > Any pointers would be greatly appreciated. After reading through the mailing list archives, I sort of work it out. ie echo -n 1 > /sys/devices/platform/s3c2410-i2c/power/state puts the device into suspend mode. However, the driver's behaviour doesn't change if I echo a different number into it. What does this number suppose to do? Tehn Yit Chin Software Engineer, Grey Innovation Pty. Ltd. _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxx https://lists.osdl.org/mailman/listinfo/linux-pm
