Power management - Revision history

SebastienSz: APF27: show menuconfig option to be able to wake the board with the user button

2016-07-01T07:35:22Z

APF27: show menuconfig option to be able to wake the board with the user button

2013-02-20T16:32:50Z

2013-02-20T16:32:12Z

‎Known problems

2013-02-20T16:31:37Z

‎Debugging suspend/resume

2013-02-20T16:31:09Z

‎Enter standby mode (i.MX in Doze mode)

2013-02-20T16:30:34Z

‎List available suspend modes

2013-02-20T16:30:10Z

‎Ethernet

2013-02-20T16:29:23Z

‎To know if driver is launched

2013-02-20T16:28:31Z

‎Enter suspend to memory mode (i.MX in Sleep mode)

2013-02-20T16:28:01Z

‎Enter suspend to memory mode (i.MX in Sleep mode)

@@ Line 28: / Line 28: @@
 {{Note| now done by default in latest apf kernel configs}}
 <pre class="config">
- Power management options  --->
+[*] Power management options  --->
       [*] Power Management support
       [*]   Power Management Debug Support
       [*]     Verbose Power Management debugging
-     [*] Suspend to RAM and standby
+[*] Suspend to RAM and standby
       [ ]   Test suspend/resume and wakealarm during bootup
-     < > Advanced Power Management Emulation
+< > Advanced Power Management Emulation
 </pre>
@@ Line 43: / Line 45: @@
 $ make linux-menuconfig
 </pre>
 <pre class="config">
+[*] Power management options  --->
 </pre>

@@ Line 120: / Line 120: @@
 * [[APF27]] USB: usb cause system warning :
+<pre class="apf">
- # echo standby > /sys/power/state
+# echo standby > /sys/power/state
- PM: Syncing filesystems ... done.
+PM: Syncing filesystems ... done.
- Freezing user space processes ... (elapsed 0.01 seconds) done.
+Freezing user space processes ... (elapsed 0.01 seconds) done.
- Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done.
+Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done.
- ___ apf27_pm_suspend
+___ apf27_pm_suspend
- ___ apf27_pm_resume
+___ apf27_pm_resume
- ------------[ cut here ]------------
+------------[ cut here ]------------
- WARNING: at kernel/hrtimer.c:625 hres_timers_resume+0x3c/0x60()
+WARNING: at kernel/hrtimer.c:625 hres_timers_resume+0x3c/0x60()
- hres_timers_resume() called with IRQs enabled!Modules linked in: gpio
+hres_timers_resume() called with IRQs enabled!Modules linked in: gpio
- [<c002c0d8>] (dump_stack+0x0/0x14) from [<c003c148>] (warn_slowpath+0x70/0x8c)
+[<c002c0d8>] (dump_stack+0x0/0x14) from [<c003c148>] (warn_slowpath+0x70/0x8c)
- [<c003c0d8>] (warn_slowpath+0x0/0x8c) from [<c0055dfc>] (hres_timers_resume+0x3c/0x60)
+[<c003c0d8>] (warn_slowpath+0x0/0x8c) from [<c0055dfc>] (hres_timers_resume+0x3c/0x60)
 ==Links==

@@ Line 112: / Line 112: @@
 ===Debugging suspend/resume===
 * pass '''no_console_suspend''' as boot parameter:
- BIOS> setenv extrabootargs no_console_suspend
+<pre class="apf">
- BIOS> boot
+BIOS> setenv extrabootargs no_console_suspend
 == Known problems ==

@@ Line 80: / Line 80: @@
 ===Enter standby mode (i.MX in Doze mode)===
- # echo standby > /sys/power/state
+<pre class="apf">
- PM: Syncing filesystems ... done.
+# echo standby > /sys/power/state
- PM: Preparing system for standby sleep
+PM: Syncing filesystems ... done.
- Freezing user space processes ... (elapsed 0.00 seconds) done.
+PM: Preparing system for standby sleep
- Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done.
+Freezing user space processes ... (elapsed 0.00 seconds) done.
- PM: Entering standby sleep
+Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done.
- Suspending console(s) (use no_console_suspend to debug)
+PM: Entering standby sleep
- imx-uart imx-uart.0: preparing suspend
+Suspending console(s) (use no_console_suspend to debug)
- imx-uart imx-uart.2: preparing suspend
+imx-uart imx-uart.0: preparing suspend
- mxc_nand mxc_nand.0: preparing suspend
+imx-uart imx-uart.2: preparing suspend
- ...
+mxc_nand mxc_nand.0: preparing suspend
 ===Enter suspend to memory mode (i.MX in Sleep mode)===

@@ Line 74: / Line 74: @@
 ===List available suspend modes===
- # cat /sys/power/state
+<pre class="apf">
- standby mem
+# cat /sys/power/state
 ===Enter standby mode (i.MX in Doze mode)===

@@ Line 61: / Line 61: @@
 ===Power-up===
-* ifconfig eth0 up
+<pre class="apf">
 ===Power-down===
-* ifconfig eth0 down   -->> ~ -400 mW
+<pre class="apf">
 ==Other devices==

@@ Line 52: / Line 52: @@
 ===To know if driver is launched===
-<pre>
+<pre class="apf">
 # dmesg | grep Power
 Power Management for Freescale i.MX2x

@@ Line 87: / Line 87: @@
 ===Enter suspend to memory mode (i.MX in Sleep mode)===
-<pre class="target">
+<pre class="apf">
   # echo mem > /sys/power/state
 </pre>

@@ Line 87: / Line 87: @@
 ===Enter suspend to memory mode (i.MX in Sleep mode)===
   # echo mem > /sys/power/state
+</pre>
-{{Warning| only an external interrupt can now wake up the i.MX27}}
+only an external interrupt can now wake up the i.MX27
 {{Warning| The mode 'mem' is not implemented in the kernel 2.6.35 for the [[APF28]].  please use the 'standby' mode}}
-{{Warning| Only few interrupts can wake up the  i.MX51 from this mode. please check the mx51 reference manual for further information}}
+Only few interrupts can wake up the  i.MX51 from this mode. please check the mx51 reference manual for further information.
 ===Wake up the board from sleep mode===