Commit Graph

14 Commits

Author SHA1 Message Date
Prashant Gaikwad 89572c77cd ARM: tegra: move tegra_cpu_car.h to linux/clk/tegra.h
tegra_cpu_car_ops struct is going to be accessed from drivers/clk/tegra.
Move the tegra_cpu_car_ops to include/linux/clk/tegra.h.

Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
2013-01-28 11:19:06 -07:00
Joseph Lo b811943160 ARM: tegra: moving the clock gating procedure to tegra_cpu_kill
The tegra_cpu_die was be executed by the CPU itslf. So the clock gating
procedure won't be executed after the CPU hardware shutdown code. Moving
the clock gating procedure to tegra_cpu_kill that will be run by another
CPU after the CPU died.

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
2013-01-28 10:21:48 -07:00
Joseph Lo 57886616ca ARM: tegra: update the cache maintenance order for CPU shutdown
Updating the cache maintenance order before CPU shutdown when doing CPU
hotplug.
The old order:
* clean L1 by flush_cache_all
* exit SMP
* CPU shutdown
Adapt to:
* disable L1 data cache by clear C bit
* clean L1 by v7_flush_dcache_louis
* exit SMP
* CPU shutdown

For CPU hotplug case, it's no need to do "flush_cache_all". And we should
disable L1 data cache before clean L1 data cache. Then leaving the SMP
coherency.

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
2013-01-28 10:21:44 -07:00
Olof Johansson 25468fe89f Merge branch 'multiplatform/smp_ops' into next/multiplatform
* multiplatform/smp_ops:
  ARM: consolidate pen_release instead of having per platform definitions
  ARM: smp: Make SMP operations mandatory
  ARM: SoC: convert spear13xx to SMP operations
  ARM: SoC: convert imx6q to SMP operations
  ARM: SoC: convert highbank to SMP operations
  ARM: SoC: convert shmobile SMP to SMP operations
  ARM: SoC: convert ux500 to SMP operations
  ARM: SoC: convert MSM to SMP operations
  ARM: SoC: convert Exynos4 to SMP operations
  ARM: SoC: convert Tegra to SMP operations
  ARM: SoC: convert OMAP4 to SMP operations
  ARM: SoC: convert VExpress/RealView to SMP operations
  ARM: SoC: add per-platform SMP operations

Conflicts due to file moves or removals in:
	arch/arm/mach-msm/board-msm8960.c
	arch/arm/mach-msm/board-msm8x60.c
	arch/arm/mach-tegra/board-harmony.c
	arch/arm/mach-tegra/board-trimslice.c

Conflicts due to board file cleanup:
	arch/arm/mach-tegra/board-paz00.c

Conflicts due to cpu hotplug addition:
	arch/arm/mach-tegra/hotplug.c

Signed-off-by: Olof Johansson <olof@lixom.net>
2012-09-22 00:16:04 -07:00
Joseph Lo 453689e407 ARM: tegra20: add CPU hotplug support
Hotplug function put CPU in offline or online mode at runtime.
When the CPU been put into offline, it was been clock gated. The
offline CPU can be power gated, when the remaining CPU goes into
LP2.

Based on the worked by:
Colin Cross <ccross@android.com>
Gary King <gking@nvidia.com>

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
2012-09-13 11:41:06 -06:00
Joseph Lo 59b0f6825c ARM: tegra30: add CPU hotplug support
Hotplug function put CPUs in offline or online state at runtime.
When the CPU been put in the offline state, it was been clock and
power gated. Except primary CPU other CPUs can be hotplugged.

Based on the work by:
Scott Williams <scwilliams@nvidia.com>
Colin Cross <ccross@android.com>
Gary King <gking@nvidia.com>

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
2012-09-13 11:41:06 -06:00
Marc Zyngier a17257322f ARM: SoC: convert Tegra to SMP operations
Convert Tegra to use struct smp_operations to provide its SMP
and CPU hotplug operations.

Tested on Harmony.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2012-09-13 15:35:49 +02:00
Russell King 15d07dc9c5 ARM: move CP15 definitions to separate header file
Avoid namespace conflicts with drivers over the CP15 definitions by
moving CP15 related prototypes and definitions to a private header
file.

Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com> [Tegra]
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Tested-by: H Hartley Sweeten <hsweeten@visionengravers.com> [EP93xx]
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: David Howells <dhowells@redhat.com>
2012-03-28 18:30:01 +01:00
Russell King 30b99d07b7 ARM: fix wrongly patched constants
e3d9c625 (ARM: CPU hotplug: fix hard-coded control register constants)
changed the wrong constants in the hotplug assembly code.  Fix this.

Reported-by: viresh kumar <viresh.kumar@st.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-01-14 12:06:26 +00:00
Russell King e3d9c625f5 ARM: CPU hotplug: fix hard-coded control register constants
Use the definition we've provided in asm/system.h rather than
numeric constants.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-20 15:09:16 +00:00
Russell King d4450261e5 ARM: CPU hotplug: fix reporting of spurious wakeups
The original scheme for reporting spurious wakeups was broken - it
tried to use printk() from a context which wasn't coherent with the
other CPUs, which risks corrupting the printk() data.

Fix this by noting the number spurious wakeups, and only report them
when we are properly woken - when we will be coherent with the rest
of the system.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-20 15:09:14 +00:00
Russell King bbc81fd432 ARM: CPU hotplug: remove bug checks in platform_cpu_die()
platform_cpu_die() is entered from the CPU's own idle thread, which
can not be migrated to other CPUs.  Moreover, the 'cpu' argument
comes from the thread info, which will always be the 'current'
CPU.  So remove this useless bug check.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-20 15:09:10 +00:00
Russell King 3c030beabf ARM: CPU hotplug: move cpu_killed completion to core code
We always need to wait for the dying CPU to reach a safe state before
taking it down, irrespective of the requirements of the platform.
Move the completion code into the ARM SMP hotplug code rather than
having each platform re-implement this.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-20 15:09:10 +00:00
Colin Cross 1cea7326b3 [ARM] tegra: SMP support
Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: Erik Gilling <konkers@android.com>
2010-08-05 14:57:01 -07:00