Power management - Revision history

JulienB: /* Links */

2024-12-10T17:43:37Z

Links

@@ Line 140: / Line 140: @@
 [<c002c0d8>] (dump_stack+0x0/0x14) from [<c003c148>] (warn_slowpath+0x70/0x8c)
 [<c003c0d8>] (warn_slowpath+0x0/0x8c) from [<c0055dfc>] (hres_timers_resume+0x3c/0x60)
 </pre>

2024-12-10T17:33:22Z

Wake up the board from sleep mode

← Older revision		Revision as of 19:33, 10 December 2024
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	* For the [[APF28]] you can use the power button, any active interrupt or the RTC.		* For the [[APF28]] you can use the power button, any active interrupt or the RTC.
	* For the [[APF27]] you will have to use an external interrupt.		* For the [[APF27]] you will have to use an external interrupt.
	* For the [[APF51]] the ~~RTc~~ or an external interrupt can wake up the board.		* For the [[APF51]] the RTC or an external interrupt can wake up the board.

	===Debugging suspend/resume===		===Debugging suspend/resume===

2016-07-01T07:35:22Z

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

← Older revision		Revision as of 09:35, 1 July 2016
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	{{Note\| now done by default in latest apf kernel configs}}		{{Note\| now done by default in latest apf kernel configs}}
	<pre class="config">		<pre class="config">
	Power management options --->		[*] Power management options --->
	[*] Power Management support		[*] Power Management support
	[*] Power Management Debug Support		[*] Power Management Debug Support
	[*] Verbose Power Management debugging		[*] Verbose Power Management debugging
	[*] Suspend to RAM and standby		[*] Suspend to RAM and standby
	[ ] Test suspend/resume and wakealarm during bootup		[ ] Test suspend/resume and wakealarm during bootup
	< > Advanced Power Management Emulation		< > Advanced Power Management Emulation
			[ ] Use D14 LED of the APF27Dev for suspend signaling
			[ ] Use S1 switch of the APF27Dev to resume after a suspend
	</pre>		</pre>

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	$ make linux-menuconfig		$ make linux-menuconfig
	</pre>		</pre>

	<pre class="config">		<pre class="config">
			[*] Power management options --->
			[*] Power Management support
			[*] Power Management Debug Support
			[*] Verbose Power Management debugging
			[*] Suspend to RAM and standby
			[ ] Test suspend/resume and wakealarm during bootup
			< > Advanced Power Management Emulation
			[ ] Use D14 LED of the APF27Dev for suspend signaling
			[*] Use S1 switch of the APF27Dev to resume after a suspend
	</pre>		</pre>

2013-02-20T16:32:50Z

2013-02-20T16:32:12Z

Known problems

← Older revision		Revision as of 18:32, 20 February 2013
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	* [[APF27]] USB: usb cause system warning :		* [[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)
			</pre>

	==Links==		==Links==

2013-02-20T16:31:37Z

Debugging suspend/resume

← Older revision		Revision as of 18:31, 20 February 2013
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	===Debugging suspend/resume===		===Debugging suspend/resume===
	* pass '''no_console_suspend''' as boot parameter:		* pass '''no_console_suspend''' as boot parameter:
	BIOS> setenv extrabootargs no_console_suspend		<pre class="apf">
	BIOS> boot		BIOS> setenv extrabootargs no_console_suspend
			BIOS> boot
			</pre>

	== Known problems ==		== Known problems ==

2013-02-20T16:31:09Z

Enter standby mode (i.MX in Doze mode)

← Older revision		Revision as of 18:31, 20 February 2013
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	===Enter standby mode (i.MX in Doze mode)===		===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
			...
			</pre>

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

2013-02-20T16:30:34Z

List available suspend modes

← Older revision		Revision as of 18:30, 20 February 2013
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	===List available suspend modes===		===List available suspend modes===
	# cat /sys/power/state		<pre class="apf">
	standby mem		# cat /sys/power/state
			standby mem
			</pre>

	===Enter standby mode (i.MX in Doze mode)===		===Enter standby mode (i.MX in Doze mode)===

2013-02-20T16:30:10Z

Ethernet

2013-02-20T16:29:23Z

To know if driver is launched

← Older revision		Revision as of 18:29, 20 February 2013
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	===To know if driver is launched===		===To know if driver is launched===
	<pre>		<pre class="apf">
	# dmesg \| grep Power		# dmesg \| grep Power
	Power Management for Freescale i.MX2x		Power Management for Freescale i.MX2x