Forwarding to devel@ - this will be of interest to us too. ----- Forwarded message from David Brownell <[EMAIL PROTECTED]> -----
From: David Brownell <[EMAIL PROTECTED]> Date: Thu, 5 Apr 2007 12:48:40 -0700 To: [EMAIL PROTECTED], [email protected] Subject: [linux-pm] [patch 2.6.21-rc5-git 0/3] x86_pc and ACPI support /sys/devices/.../wakeup Following are three patches for basic driver model wakeup flag support on PCs. I think the first two are nearly mergable. The third previously broke powerpc, so it's likely not yet mergeable ... the issue was arch-specific differences in PCI initialization, someone else will need to solve them. The patches are: - Define a platform_enable_wakeup() PM hook and use it with PCI. (This might help OLPC with its non-RTC events...) - Make ACPI init and use driver model wakeup flags for the (motherboard) devices in its table ... and implement that new platform hook. Now /proc/acpi/wakeup is almost purely informative. - Update PCI to set those flags on devices that can issue PME#/WAKE#; this gets overridden by ACPI, except for add-on cards. Now, I've not yet made time to test whether the results _work_ but they do look like they do the right thing. (So far I've had lousy luck seeing ACPI recover from wake events...) The script I append (which I've posted before) gave the following on one system: input on acpi_system:00/device:00/PNP0C0E:00 on pci0000:00/0000:00:09.0 lan on pci0000:00/0000:00:04.0 hub on pci0000:00/0000:00:03.3/usb1 usb_host on pci0000:00/0000:00:03.3 hub on pci0000:00/0000:00:03.1/usb3 usb_host on pci0000:00/0000:00:03.1 input on pci0000:00/0000:00:03.0/usb2/2-1/2-1.1 hub on pci0000:00/0000:00:03.0/usb2/2-1 hub on pci0000:00/0000:00:03.0/usb2 usb_host on pci0000:00/0000:00:03.0 modem on pci0000:00/0000:00:02.7 on pci0000:00 tty on pnp0/00:08 on pnp0/00:06 on pnp0/00:05 rtc on pnp0/00:02 Notice the external USB hub and keyboard. The i8042 drivers don't seem to list themselvs as input drivers in the usual way, or those PS2 kbd/aux nodes would also say "input". PCI 00:09.0 is an add-in card, invisible without the third patch; it'd be a USB host if it had a Linux driver. - Dave #!/bin/bash # pm-wake # classfilename *:* ==> $type class_label () { case $1 in # recognize common types of wakeup-capable devices i2c-dev:*) type="smbus "; return 0;; input:*) type="input "; return 0;; mmc_host:*) type="mmc_host "; return 0;; net:eth*) type="lan "; return 0;; net:*) type="net "; return 0;; pcmcia_socket:*)type="pcmcia "; return 0;; rtc:*) type="rtc "; return 0;; sound:*) type="modem "; return 0;; tty:*) type="tty "; return 0;; usb_host:*) type="usb_host "; return 0;; esac return 1 } # interface_label $PATH ==> $type interface_label () { for F in $(cd $1 >/dev/null 2>&1 ; echo *:*) do class_label $F && return done } # devtype $PATH ==> $type devtype () { local F T # fixed length, currently ten spaces type="" for F in $(cd $1 >/dev/null 2>&1 ; echo *:*) do if [ ! -d "$1/$F" ] then break; fi # is this a usb interface? if [ -f $1/$F/bInterfaceClass ] then interface_label $1/$F && return fi case $F in # use interface's label if possible, else generic usb_device:*) read T < $1/maxchild if [ 0 -lt $T ] then type="hub " return fi type="(usb) " continue;; *:*) class_label $F && return ;; esac done if [ "$type" = "" ] then for T in $(cd $1 >/dev/null 2>&1 ; echo fw-host*/ieee1394_host:*) do if [ ! -L "$1/$T" ] then break; fi type="firewire " return done fi if [ "$type" = "" ] then type=" " fi } cd /sys/devices for F in $(find * -name 'wakeup') do # F=.../power/wakeup read value < $F if [ "$value" = "" ] then continue fi # F=... F=$(dirname $(dirname $F)) devtype $F # for each entry that actually supports wakeup, one line with: # - device type (if recognized) # - wake on/OFF # - /sys/devices/... path case "$value" in "disabled") echo "$type OFF $F" ;; "enabled") echo "$type on $F" ;; esac done _______________________________________________ linux-pm mailing list [EMAIL PROTECTED] https://lists.linux-foundation.org/mailman/listinfo/linux-pm ----- End forwarded message ----- -- Jordan Crouse Senior Linux Engineer Advanced Micro Devices, Inc. <www.amd.com/embeddedprocessors> _______________________________________________ Devel mailing list [email protected] http://mailman.laptop.org/mailman/listinfo/devel
