[PATCH v5 0/7] cleanup imx5 idle, add imx5/6 cpuidle
From: Robert Lee
Date: Mon May 21 2012 - 18:50:35 EST
Cleanup up imx5 idle code and enable imx5 low powe idle for imx53.
Add common imx cpuidle initialization functionality and add a i.MX5 and i.MX6Q
platform cpuidle implementation.
Based on v3.4 plus recently submitted/accepted MACHINE_INIT late_initcall
patch series: http://www.spinics.net/lists/arm-kernel/msg171620.html and common
clock patch series:
http://comments.gmane.org/gmane.linux.ports.arm.kernel/161043
v5 changes:
* rebase to v3.4 plus common clock patch series
* various trivial changes/fixes from v4 submssion
* Add separate pm_init patch for imx51 and imx53
v4 changes:
* Added several imx5 idle cleanups to series.
* Modified imx_io_p2v function to allow common imx5 AIPS2 bus virutal address
* Added comment to tzic_wakeup_enable().
* Movied imx5 idle code from mm-imx5.c to pm-imx5.c.
* Removed unnecessary time consuming code execution that ran on each idle
instance.
* modified imx5_pm_init to be a late_initcall
* added late_initcall to all imx53 MACHINE_START entries.
* enabled imx5 low power idle for imx53
* rebased cpuidle driver on top of imx5 cleanup changes.
* modified cpuidle driver exit time to reflect removal of unnecessary code
http://comments.gmane.org/gmane.linux.linaro.devel/11858
v3 changes:
* removed file introduced in v1 no longer needed after v2 [per Shawn Guo]
* re-ordered added #includes in alphabetical order [per Shawn Guo]
* Remove if(!drv) check to allow handling by stack trace [per Sascha Hauer]
* Added missing return value in error meesage [per Shawn Guo]
* fixed (void *) casting problem pointed out Sasha Hauer. Used a different
type of casting to properly give warning on improper casting:
arm_pm_idle = (void (*)(void))imx5_idle;
Used this casting instead of adding a dummy caller function because
adding the dummy function appears to unnecessarily introduce the following
additional operations:
static void imx5_pm_idle(void)
{
a0: e1a0c00d mov ip, sp
a4: e92dd800 push {fp, ip, lr, pc}
a8: e24cb004 sub fp, ip, #4
imx5_idle();
ac: ebffffd3 bl 0 <imx5_idle>
}
b0: e89da800 ldm sp, {fp, sp, pc}
http://permalink.gmane.org/gmane.linux.linaro.devel/11653
v2 changes:
* Removed some unnecessary spaces [per Jess Juhl]
* Added return value for an error message [per Sascha Hauer]
* Reworked init scheme to use device tree late_initcall [per Sascha and Shawn]
* Moved imx6q and imx5 cpuidle functionality to existing files.
https://lkml.org/lkml/2012/5/1/363
v1 initial submission:
https://lkml.org/lkml/2012/4/16/644
Robert Lee (7):
ARM: imx: Modify IMX_IO_P2V macro
ARM: imx: Add comments to tzic_enable_waker()
ARM: imx: clean and consolidate imx5 suspend and idle code
ARM: imx: Enable imx53 low power idle
ARM: imx: Add common imx cpuidle init functionality.
ARM: imx: Add imx5 cpuidle
ARM: imx: Add imx6q cpuidle driver
arch/arm/mach-imx/clk-imx51-imx53.c | 2 +-
arch/arm/mach-imx/clock-mx51-mx53.c | 1 +
arch/arm/mach-imx/imx53-dt.c | 1 +
arch/arm/mach-imx/mach-imx6q.c | 19 +++++
arch/arm/mach-imx/mach-mx53_ard.c | 1 +
arch/arm/mach-imx/mach-mx53_evk.c | 1 +
arch/arm/mach-imx/mach-mx53_loco.c | 1 +
arch/arm/mach-imx/mach-mx53_smd.c | 1 +
arch/arm/mach-imx/mm-imx5.c | 26 ++-----
arch/arm/mach-imx/pm-imx5.c | 111 ++++++++++++++++++++++-------
arch/arm/plat-mxc/Makefile | 1 +
arch/arm/plat-mxc/cpuidle.c | 80 +++++++++++++++++++++
arch/arm/plat-mxc/include/mach/common.h | 6 +-
arch/arm/plat-mxc/include/mach/cpuidle.h | 22 ++++++
arch/arm/plat-mxc/include/mach/hardware.h | 25 ++++---
arch/arm/plat-mxc/tzic.c | 4 ++
16 files changed, 243 insertions(+), 59 deletions(-)
create mode 100644 arch/arm/plat-mxc/cpuidle.c
create mode 100644 arch/arm/plat-mxc/include/mach/cpuidle.h
--
1.7.10
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