ARM: tegra: support LP1 suspend mode

Quoted 3 lines

This series adds the support of LP1 suspend mode for Tegra.

Verified on Seaboard, Cardhu and Dalmore.

tested on AC100 and worked fine, except

[   68.448007] PM: Syncing filesystems ... done.
[   71.370086] Freezing user space processes ... (elapsed 0.001 seconds) done.
[   71.370088] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) 
done.
[   71.371253] Suspending console(s) (use no_console_suspend to debug)
[   71.638481] PM: suspend of devices complete after 266.604 msecs
[   71.638905] PM: late suspend of devices complete after 0.417 msecs
[   71.639477] PM: noirq suspend of devices complete after 0.568 msecs
[   71.639480] Disabling non-boot CPUs ...
[   71.640242] CPU1: shutdown
[   71.641216] Entering suspend state LP1
[   71.641267] Enabling non-boot CPUs ...
[   71.643125] CPU1: Booted secondary processor
[   71.643449] CPU1 is up
[   71.643786] PM: noirq resume of devices complete after 0.331 msecs
[   71.644300] PM: early resume of devices complete after 0.364 msecs
[   71.648038] ------------[ cut here ]------------
[   71.648061] WARNING: CPU: 0 PID: 1025 at kernel/irq/manage.c:529 
irq_set_irq_wake+0xb8/0xf0()
[   71.648064] Unbalanced IRQ 384 wake disable
[   71.648068] Modules linked in:
[   71.648075] CPU: 0 PID: 1025 Comm: bash Not tainted 3.11.0-rc2-
next-20130726-00008-gef01509-dirty #6
[   71.648107] [<c001551c>] (unwind_backtrace+0x0/0xf8) from [<c001154c>] 
(show_stack+0x10/0x14)
[   71.648128] [<c001154c>] (show_stack+0x10/0x14) from [<c0515288>] 
(dump_stack+0x80/0xc4)
[   71.648142] [<c0515288>] (dump_stack+0x80/0xc4) from [<c0025340>] 
(warn_slowpath_common+0x64/0x88)
[   71.648151] [<c0025340>] (warn_slowpath_common+0x64/0x88) from [<c00253f8>] 
(warn_slowpath_fmt+0x30/0x40)
[   71.648161] [<c00253f8>] (warn_slowpath_fmt+0x30/0x40) from [<c007ff8c>] 
(irq_set_irq_wake+0xb8/0xf0)
[   71.648178] [<c007ff8c>] (irq_set_irq_wake+0xb8/0xf0) from [<c0334d00>] 
(tps6586x_rtc_resume+0x30/0x38)
[   71.648192] [<c0334d00>] (tps6586x_rtc_resume+0x30/0x38) from [<c02951d0>] 
(platform_pm_resume+0x2c/0x4c)
[   71.648202] [<c02951d0>] (platform_pm_resume+0x2c/0x4c) from [<c0299d40>] 
(dpm_run_callback.isra.5+0x18/0x38)
[   71.648211] [<c0299d40>] (dpm_run_callback.isra.5+0x18/0x38) from 
[<c029a044>] (device_resume+0xb0/0x170)
[   71.648219] [<c029a044>] (device_resume+0xb0/0x170) from [<c029aeb4>] 
(dpm_resume+0xe8/0x20c)
[   71.648227] [<c029aeb4>] (dpm_resume+0xe8/0x20c) from [<c029b174>] 
(dpm_resume_end+0xc/0x18)
[   71.648245] [<c029b174>] (dpm_resume_end+0xc/0x18) from [<c005e480>] 
(suspend_devices_and_enter+0xdc/0x2f8)
[   71.648256] [<c005e480>] (suspend_devices_and_enter+0xdc/0x2f8) from 
[<c005e810>] (pm_suspend+0x174/0x1e8)
[   71.648265] [<c005e810>] (pm_suspend+0x174/0x1e8) from [<c005d710>] 
(state_store+0x6c/0xbc)
[   71.648285] [<c005d710>] (state_store+0x6c/0xbc) from [<c01eca78>] 
(kobj_attr_store+0x14/0x20)
[   71.648298] [<c01eca78>] (kobj_attr_store+0x14/0x20) from [<c011e970>] 
(sysfs_write_file+0x168/0x198)
[   71.648312] [<c011e970>] (sysfs_write_file+0x168/0x198) from [<c00cd060>] 
(vfs_write+0xb0/0x188)
[   71.648321] [<c00cd060>] (vfs_write+0xb0/0x188) from [<c00cd410>] 
(SyS_write+0x3c/0x70)
[   71.648330] [<c00cd410>] (SyS_write+0x3c/0x70) from [<c000e560>] 
(ret_fast_syscall+0x0/0x30)
[   71.648334] ---[ end trace e5ed8212ac4db5da ]---
[   72.063578] mmc1: power class selection to bus width 8 failed
[   72.297753] usb 2-1: reset high-speed USB device number 2 using tegra-ehci
[   72.567736] usb 3-1: reset high-speed USB device number 2 using tegra-ehci
[   73.022058] usb 3-1.3: reset high-speed USB device number 4 using tegra-
ehci
[   73.216064] usb 3-1.2: reset high-speed USB device number 3 using tegra-
ehci
[   73.360225] PM: resume of devices complete after 1715.937 msecs
[   73.361008] Restarting tasks ... done.

and sdcard being offline after resume (fixed by CONFIG_MMC_UNSAFE_RESUME=y). Anyway, thanks for your great work!

Tested-by Marc Dietrich <[email protected]>

Quoted 43 lines

And tested with THUMB2_KERNEL as well.

P.S.
A known issue on Dalmore, the LP1 resume may take 10 ~ 15 seconds due to the 792MHz BCT. It can't be reproduced on Seaboard or Cardhu. And the root cause of this is about the default settings of EMC registers that cause the DRAM can't leave self-refresh mode immediately. If you want to test with quick LP1 resume on Dalmore, I can provide another HACK for this.

Joseph Lo (8):
ARM: tegra: add common resume handling code for LP1 resuming
ARM: tegra: config the polarity of the request of sys clock
clk: tegra114: add LP1 suspend/resume support
ARM: tegra: add common LP1 suspend support
ARM: tegra30: add LP1 suspend support
ARM: tegra20: add LP1 suspend support
ARM: tegra114: add LP1 suspend support
ARM: dts: tegra: enable LP1 suspend mode

 arch/arm/boot/dts/tegra114-dalmore.dts     |   2 +-
 arch/arm/boot/dts/tegra20-colibri-512.dtsi |   2 +-
 arch/arm/boot/dts/tegra20-harmony.dts      |   2 +-
 arch/arm/boot/dts/tegra20-paz00.dts        |   2 +-
 arch/arm/boot/dts/tegra20-seaboard.dts     |   2 +-
 arch/arm/boot/dts/tegra20-tamonten.dtsi    |   2 +-
 arch/arm/boot/dts/tegra20-trimslice.dts    |   2 +-
 arch/arm/boot/dts/tegra20-ventana.dts      |   2 +-
 arch/arm/boot/dts/tegra20-whistler.dts     |   2 +-
 arch/arm/boot/dts/tegra30-beaver.dts       |   2 +-
 arch/arm/boot/dts/tegra30-cardhu.dtsi      |   2 +-
 arch/arm/mach-tegra/Makefile               |   3 +
 arch/arm/mach-tegra/iomap.h                |   6 +
 arch/arm/mach-tegra/pm-tegra20.c           |  37 ++
 arch/arm/mach-tegra/pm-tegra30.c           |  37 ++
 arch/arm/mach-tegra/pm.c                   | 121 +++++-
 arch/arm/mach-tegra/pm.h                   |  23 ++
 arch/arm/mach-tegra/pmc.c                  |  36 +-
 arch/arm/mach-tegra/pmc.h                  |   3 +
 arch/arm/mach-tegra/reset-handler.S        |  13 +
 arch/arm/mach-tegra/reset.c                |   2 +
 arch/arm/mach-tegra/reset.h                |   4 +
 arch/arm/mach-tegra/sleep-tegra20.S        | 300 ++++++++++++++

Quoted 8 lines

 arch/arm/mach-tegra/sleep-tegra30.S        | 615
+++++++++++++++++++++++++++++ arch/arm/mach-tegra/sleep.S                | 
 8 +-
 arch/arm/mach-tegra/sleep.h                |  18 +
 drivers/clk/tegra/clk-tegra114.c           |  32 ++
 27 files changed, 1259 insertions(+), 21 deletions(-)
 create mode 100644 arch/arm/mach-tegra/pm-tegra20.c
 create mode 100644 arch/arm/mach-tegra/pm-tegra30.c

--
To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo at vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html