The magic cookie for entering sleep state was defined and used in
two different places: firmware.c and suspend.c. Move it to one common
place to reduce duplication.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

Function is not used outside of this unit, make it static.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

The new CPU clock type allows the use of generic CPUfreq driver.
Switch Exynos4210 to using generic cpufreq driver.

Changes by Bartlomiej:
- removed non-Exynos4210 support for now

Cc: Tomasz Figa <tomasz.figa@gmail.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NThomas Abraham <thomas.ab@samsung.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: NMichael Turquette <mturquette@baylibre.com>

SYSMMU devices are registered very early in arch_initcall, so ensure
that they can get access to power domains by registering power domain
driver from earlier initcall. This change requires dropping usage of
the platform device associated with each power domain and replacing
clock calls with respective of_clk_* equivalents.
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

PS_HOLD based power off procedure is common for all Exynos SoCs,
so use it for every Exynos SoCs.
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Tested-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Tested-by: NTobias Jakobi <tjakobi@math.uni-bielefeld.de>
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

The irq_domain_ops are not modified by the driver and the irqdomain
core code accepts pointer to a const data.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

The following patch adds coupled cpuidle support for Exynos3250 to
an existing cpuidle-exynos driver.  As a result it enables AFTR mode
to be used by default on Exynos3250 without the need to hot unplug
CPU1 first.

The detailed changelog:
- use exynos_[get,set]_boot_addr() in cpuidle-exynos.c and then make
  cpu_boot_reg_base() static
- use exynos_core_restart() in exynos_cpu0_enter_aftr()
- add missing smp_rmb() to exynos_cpu0_enter_aftr() (to make the code
  in-sync with the platform SMP code)
- add call_firmware_op(cpu_boot, 1) to exynos_cpu0_enter_aftr()
- use dsb_sev() instead of IPI wakeup for Exynos3250 in
  exynos_cpu0_enter_aftr()
- add CPU0 vs CPU1 synchronization based on S5P_PMU_SPARE2 register
  for Exynos3250 to cpuidle-exynos.c
- add flush_cache_all() for CPU1/0 before powerdown/AFTR for
  Exynos3250 to exynos_wfi_finisher()/exynos_do_idle()
Signed-off-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

Add get_cpu_boot_addr() firmware operation and then
exynos_get_boot_addr() helper.

This is a preparation for adding coupled cpuidle support
for Exynos3250 SoC.

There should be no functional changes caused by this patch.
Signed-off-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

Add exynos_set_boot_addr() helper and covert existing code
(exynos_boot_secondary() and exynos_smp_prepare_cpus()) to
use it.

There should be no functional changes caused by this patch.
Signed-off-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

There is a kernel message about secondary CPU bootup when
exynos_core_restart() is called through CPU hotplug code-path (the
only exynos_core_restart() user currently) so there is no need for
an extra info on Exynos3250 SoC about software reset.  This also
prepares exynos_core_restart() to be re-used in coupled cpuidle
code-path in the future.
Signed-off-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

exynos_boot_secondary() can erroneously return 0 or -ENOSYS even
when waiting on pen_release being set to -1 timeouts.  Fix it by
adjusting ret variable value to -ETIMEDOUT when necessary.
Signed-off-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

Using a fixed (by DTS) parent for clocks when turning on the power
domain may introduce issues in other drivers. For example when such
driver changes the parent during runtime and expects that he is the
only place of such change.

Do not rely on DTS providing the fixed parent for such clocks. Instead
before switching domain off, grab a current parent of a clock with
clk_get_parent().
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

Add missing of_node_put() to:
1. Error return path if allocating memory for exynos_pm_domain failed.
2. Second iteration over power domains if a child domain was not
   present or was incomplete.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Reported-by: NKarol Wrona <k.wrona@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

Prevent possible NULL pointer dereference of pointer returned by
of_find_device_by_node(). Handle this by skipping such power domain.

Additionally fail the init on kstrdup() failure. Such case is actually
not fatal because the name for power domain allocated by kstrdup() is
used only in printk. Still as a precaution handle this as an error
condition.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

Prevent possible NULL pointer dereference if of_iomap() fails.
Handle the error by skipping such power domain.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

Commit 8b283c02 (ARM: exynos4/5: convert pmu wakeup to
stacked domains) changed the Exynos PMU code to use stacked
domains. This has led to a number of interrupt numbers to be
fixed.

In the meantime, support for Exynos 3250 was added, missing
the required change to this platform. This amounts to revert
ace283a0 (ARM: EXYNOS: Fix wrong hwirq of RTC interrupt
for Exynos3250 SoC), as the initial patch was right, just a
bit early...

Cc: Chanwoo Choi <cw00.choi@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Kukjin Kim <kgene@kernel.org>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>
Reviewed-by: NChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>

of_machine_is_compatible() seems to be preferred over soc_is_exynos4().
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

On Exynos4412 boards (Trats2, Odroid U3) after enabling L2 cache in
56b60b8b ("ARM: 8265/1: dts: exynos4: Add nodes for L2 cache
controller") the second suspend to RAM failed. First suspend worked fine
but the next one hang just after powering down of secondary CPUs (system
consumed energy as it would be running but was not responsive).

The issue was caused by enabling delayed reset assertion for CPU0 just
after issuing power down of cores. This was introduced for Exynos4 in
13cfa6c4 ("ARM: EXYNOS: Fix CPU idle clock down after CPU off").

The whole behavior is not well documented but after checking with vendor
code this should be done like this (on Exynos4):
1. Enable delayed reset assertion when system is running (for all CPUs).
2. Disable delayed reset assertion before suspending the system.
   This can be done after powering off secondary CPUs.
3. Re-enable the delayed reset assertion when system is resumed.

Fixes: 13cfa6c4 ("ARM: EXYNOS: Fix CPU idle clock down after CPU off")
Cc: <stable@vger.kernel.org>
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Tested-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Tested-by: NChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

ERR_PTR was dereferenced during sub domain parsing, if parent domain
could not be obtained (because of invalid phandle or deferred
registration of parent domain).

The Exynos power domain code checked whether
of_genpd_get_from_provider() returned NULL and in that case it skipped
that power domain node. However this function returns ERR_PTR or valid
pointer, not NULL.

Fixes: 0f780751 ("ARM: EXYNOS: add support for sub-power domains")
Cc: <stable@vger.kernel.org>	[4.0+]
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

Since commit 8b283c02 ("ARM: exynos4/5: convert pmu wakeup to
stacked domains"), a suspend/resume is not supported on old DT.

Although, rather than printing a warning and continue to boot, the
kernel will segfault just after:

------------[ cut here ]------------

WARNING: CPU: 1 PID: 1 at arch/arm/mach-exynos/suspend.c:726 exynos_pm_init+0x4c/0xc8()
Modules linked in:
CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.1.0-rc3 #1
Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
[<c02181c4>] (unwind_backtrace) from [<c0213b2c>] (show_stack+0x10/0x14)
[<c0213b2c>] (show_stack) from [<c0949890>] (dump_stack+0x70/0x8c)
[<c0949890>] (dump_stack) from [<c024f0b0>] (warn_slowpath_common+0x74/0xac)
[<c024f0b0>] (warn_slowpath_common) from [<c024f104>] (warn_slowpath_null+0x1c/0x24)
[<c024f104>] (warn_slowpath_null) from [<c0cf1d28>] (exynos_pm_init+0x4c/0xc8)
[<c0cf1d28>] (exynos_pm_init) from [<c0ceaae8>] (init_machine_late+0x1c/0x28)
[<c0ceaae8>] (init_machine_late) from [<c020aa64>] (do_one_initcall+0x80/0x1d0)
[<c020aa64>] (do_one_initcall) from [<c0ce8d4c>] (kernel_init_freeable+0x10c/0x1d8)
[<c0ce8d4c>] (kernel_init_freeable) from [<c0944a2c>] (kernel_init+0x8/0xe4)
[<c0944a2c>] (kernel_init) from [<c0210e60>] (ret_from_fork+0x14/0x34)
---[ end trace 335bd937d409f3c7 ]---
Outdated DT detected, suspend/resume will NOT work
Unable to handle kernel NULL pointer dereference at virtual address 00000608
pgd = c0204000
[00000608] *pgd=00000000
Internal error: Oops: 5 [#1] SMP ARM
Modules linked in:
CPU: 1 PID: 1 Comm: swapper/0 Tainted: G        W       4.1.0-rc3 #1
Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
task: db06c000 ti: db05a000 task.ti: db05a000
PC is at exynos_pm_init+0x6c/0xc8
LR is at exynos_pm_init+0x54/0xc8
pc : [<c0cf1d48>]    lr : [<c0cf1d30>]    psr: 60000113
sp : db05bee8  ip : 00000000  fp : 00000000
r10: 00000116  r9 : c0dab2d4  r8 : d8d5f440
r7 : c0db7ad8  r6 : c0db7ad8  r5 : 00000000  r4 : c0ceaacc
r3 : c0eb2aec  r2 : c0951e40  r1 : 00000000  r0 : c0eb2acc
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 10c5387d  Table: 6020406a  DAC: 00000015
Process swapper/0 (pid: 1, stack limit = 0xdb05a220)
Stack: (0xdb05bee8 to 0xdb05c000)
bee0:                   c0db7ad8 c0d8fe34 c0cf17c8 c0ceaae8 00000000 c020aa64
bf00: 00000033 c09580b8 db04fd00 c0ed79a4 c0eb1000 c0ce8588 c0ca2bc4 c0353fcc
bf20: 00000000 c0df358c 60000113 00000000 dbfffba4 00000000 c0ca2bc4 c026654c
bf40: c0b80134 c0ca1a64 00000007 00000007 c0df3554 c0d6c2f4 00000007 c0d6c2d4
bf60: c0eb1000 c0ce8588 c0dab2d4 00000116 00000000 c0ce8d4c 00000007 00000007
bf80: c0ce8588 c0944a24 00000000 c0944a24 00000000 00000000 00000000 00000000
bfa0: 00000000 c0944a2c 00000000 c0210e60 00000000 00000000 00000000 00000000
bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[<c0cf1d48>] (exynos_pm_init) from [<c0ceaae8>] (init_machine_late+0x1c/0x28)
[<c0ceaae8>] (init_machine_late) from [<c020aa64>] (do_one_initcall+0x80/0x1d0)
[<c020aa64>] (do_one_initcall) from [<c0ce8d4c>] (kernel_init_freeable+0x10c/0x1d8)
[<c0ce8d4c>] (kernel_init_freeable) from [<c0944a2c>] (kernel_init+0x8/0xe4)
[<c0944a2c>] (kernel_init) from [<c0210e60>] (ret_from_fork+0x14/0x34)
Code: e59f005c e59220c0 e5901000 e5832000 (e591e608)
---[ end trace 335bd937d409f3c8 ]---

This is happening because pmu_base_addr is only initialized when the
PMU is an interrupt controller. It's not the case on old DT.
Signed-off-by: NJulien Grall <julien.grall@citrix.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

This is currently unused.

If a suspend must be limited to CPU level only by preventing the last man
from triggering a cluster level suspend then this should be determined
according to many other criteria the MCPM layer is currently not aware of.
It is unlikely that mcpm_cpu_suspend() would be the proper conduit for
that information anyway.
Signed-off-by: NNicolas Pitre <nico@linaro.org>
Acked-by: NDave Martin <Dave.Martin@arm.com>

The custom suspend callback is removed for this change. The extra call
to exynos_cpu_power_up(() that was present at the end of exynos_suspend()
is now relocated to the cpu_is_up callback.
Signed-off-by: NNicolas Pitre <nico@linaro.org>
Tested-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NOlof Johansson <olof@lixom.net>

This code calls cpu_resume() using a straight branch (b), so
now that we have moved cpu_resume() back to .text, this should
be moved there as well. Any direct references to symbols that will
remain in the .data section are replaced with explicit PC-relative
references.
Acked-by: NNicolas Pitre <nico@linaro.org>
Signed-off-by: NArd Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This patch separates the PMU driver code from the low level
CCI driver code and enables the PMU driver for ARM64.

Introduces config options for both.

 ARM_CCI400_PORT_CTRL	- controls the low level driver code for
			  CCI400 ports.
 ARM_CCI400_PMU		- controls the PMU driver code
 ARM_CCI400_COMMON	- Common defintions for CCI400

This patch also changes:
 ARM_CCI - common code for probing the CCI devices. This can be
   used for adding support for newer CCI versions(e.g, CCI-500).

Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Abhilash Kesavan <a.kesavan@samsung.com>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Punit Agrawal <punit.agrawal@arm.com>
Acked-by: NSudeep Holla <sudeep.holla@arm.com>
Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org>
Acked-by: NPunit Agrawal <punit.agrawal@arm.com>
Signed-off-by: NSuzuki K. Poulose <suzuki.poulose@arm.com>
Signed-off-by: NWill Deacon <will.deacon@arm.com>

Register cpuidle platform device on Exynos3250 SoC allowing EXYNOS
cpuidle driver usage on this SoC.

Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Tested-by: NChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

AFTR mode support brings reduced energy consumption and is
a prerequisite for more advanced W-AFTR/LPA power saving modes.

AFTR mode has been already supported on other Exynos SoCs for
few years and this patch adds its support for Exynos3250 SoC.

The differences in Exynos3250 SoC AFTR mode support when compared
to Exynos4x12 SoCs are:
- different secure firmware calls are used
- different S5P_WAKEUP_MASK wakeup mask is used
- S5P_WAKEUP_MASK2 wakeup mask needs to be set in addition to
  the standard S5P_WAKEUP_MASK one
- C2_STATE BOOT mode flag needs to be set/cleared pre/post AFTR

Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Tested-by: NChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

This code is needed for cpuidle (W-)AFTR mode support on Exynos3250.

Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Tested-by: NChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

CPU1 hotplug may hang when AFTR is used.  Fix it by:
- setting AUTOWAKEUP_EN bit in ARM_COREx_CONFIGURATION register in
  exynos_cpu_power_up()
- not clearing reserved bits of ARM_COREx_CONFIGURATION register in
  exynos_cpu_power_down()
- waiting while an undocumented register 0x0908 becomes non-zero in
  exynos_core_restart()
- using dsb_sev() instead of IPI in exynos_boot_secondary() on
  Exynos3250

This patch also fixes hotplug issues during resume from S2R:
$ echo mem > /sys/power/state
[  156.517266] Disabling non-boot CPUs ...
[  156.517781] IRQ18 no longer affine to CPU1
[  156.518043] CPU1: shutdown
[  156.544718] Enabling non-boot CPUs ...
[  156.554925] CPU1: Software reset
[  158.552631] CPU1: failed to come online
[  158.552753] Error taking CPU1 up: -5

Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Tested-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Tested-by: NChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

Exynos has been (ab)using the gic_arch_extn to provide
wakeup from suspend, and it makes a lot of sense to convert
this code to use stacked domains instead.

This patch does just this, updating the DT files to actually
reflect what the HW provides.

BIG FAT WARNING: because the DTs were so far lying by not
exposing the fact that the PMU block is actually the first
interrupt controller in the chain for RTC, kernels with this patch
applied wont have any suspend-resume facility when booted
with old DTs, and old kernels with updated DTs may not even boot.

Also, I strongly suspect that there is more than two wake-up
interrupts on these platforms, but I leave it to the maintainers
to fix their mess.
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>
Link: https://lkml.kernel.org/r/1426088693-15724-2-git-send-email-marc.zyngier@arm.com
[ jac: squash in maz's fixup from
  https://lkml.kernel.org/r/5506989D.9050703@arm.com ]
Signed-off-by: NJason Cooper <jason@lakedaemon.net>

The Exynos cpuidle driver has coupled cpuidle built-in so it cannot be
built without SMP:

arch/arm/mach-exynos/pm.c: In function 'exynos_cpu0_enter_aftr':
arch/arm/mach-exynos/pm.c:246:4: error: implicit declaration of function 'arch_send_wakeup_ipi_mask' [-Werror=implicit-function-declaration]
arch/arm/mach-exynos/built-in.o: In function 'exynos_pre_enter_aftr':
../arch/arm/mach-exynos/pm.c:300: undefined reference to 'cpu_boot_reg_base'
arch/arm/mach-exynos/built-in.o: In function 'exynos_cpu1_powerdown':
../arch/arm/mach-exynos/pm.c:282: undefined reference to 'exynos_cpu_power_down'

Fix it by adding missing checks for SMP.
Reported-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

Since 32b0aa9a ("ARM: EXYNOS: Remove i2c sys configuration related
code") the Exynos 5250 no longer saves additional registers under
'exynos_pm_data.extra_save' field.

No one else uses this code so get rid of it making also 'exynos_pm_data'
const everywhere.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: NPankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

The 'exynos5420_pm_data' is not modified and can be made const.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: NPankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

The 'pm_data', 'exynos_release_ret_regs', 'exynos3250_release_ret_regs'
and 'exynos5420_release_ret_regs' are not exported nor used outside of
suspend.c file. Make them static.

This fixes following sparse warnings:
arch/arm/mach-exynos/suspend.c:83:23: warning: symbol 'pm_data' was not declared. Should it be static?
arch/arm/mach-exynos/suspend.c:106:14: warning: symbol 'exynos_release_ret_regs' was not declared. Should it be static?
arch/arm/mach-exynos/suspend.c:117:14: warning: symbol 'exynos5420_release_ret_regs' was not declared. Should it be static?
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: NPankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

The power domain nodes in DTS may be very generic (e.g. "power-domain"
for Exynos 5420) making it very hard to debug:

$ cat /sys/kernel/debug/pm_genpd/pm_genpd_summary
    domain                      status         slaves
power-domain                    on

Use platform device name instead so the names will be a little more
user friendly:
    domain                      status         slaves
100440e0.power-domain           on
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Suggested-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Suggested-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: NChanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: NKevin Hilman <khilman@linaro.org>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

Since Exynos5420 there are async-bridges (ASB) between different IPs. These
bridges must be operational during power domain on/off, ie. clocks used
by these bridges should be enabled.
This patch enabled these clocks during domain on/off.
Signed-off-by: NAndrzej Hajda <a.hajda@samsung.com>
Reviewed-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

This patch fixes wrong hwirq of RTC irq for Exynos3250 SoC. When entering
suspend state, 'enable_irq_wake fail' happen because of the mismatch of RTC hwirq.

[  429.200937] Freezing user space processes ... (elapsed 0.002 seconds) done.
[  429.203383] Freezing remaining freezable tasks ... (elapsed 0.000 seconds) done.
[  429.209914] Suspending console(s) (use no_console_suspend to debug)
[  429.370685] wake enabled for irq 65
[  429.370837] wake enabled for irq 64
[  429.370868] wake enabled for irq 79
...
[  429.372120] s3c-rtc 10070000.rtc: enable_irq_wake failed

Fixes: a4f582f5 (ARM: EXYNOS: Add exynos3250 suspend-to-ram support)
Signed-off-by: NChanwoo Choi <cw00.choi@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

During CPU shutdown the exynos_cpu_power_down() is called after
disabling cache coherency and it uses LDREX and STREX instructions (by
calling of_machine_is_compatible() -> kobject_get() -> kref_get()).

The LDREX and STREX should not be used after disabling the cache
coherency so just use soc_is_exynos().

Fixes: adc548d7 ("ARM: EXYNOS: Use MCPM call-backs to support S2R
on exynos5420")
Reported-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

This patch adds support for making one power domain a sub-domain of
other domain. This is useful for modeling power dependences for devices
like TV Mixer or Camera ISP, which needs to have more than one power
domain enabled to be operational.

Based on previous work by Amit Daniel Kachhap <amit.daniel@samsung.com>.
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: NUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

of_device_ids (i.e. compatible strings and the respective data) are not
supposed to change at runtime. All functions working with of_device_ids
provided by <linux/of.h> work with const of_device_ids. So mark the
non-const structs in arch/arm as const, too.

While at it also add some __initconst annotations.
Acked-by: NJason Cooper <jason@lakedameon.net>
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

The definition

	static const char *axxia_dt_match[] __initconst = {
		...

defines a changable array of constant strings. That is you must not do:

	*axxia_dt_match[0] = 'k';

but

	axxia_dt_match[0] = "different string";

is fine. So the annotation __initconst is wrong and yields a compiler
error when other really const variables are added with __initconst.

As the struct machine_desc member dt_compat is declared as

	const char *const *dt_compat;

making the arrays const is the better alternative over changing all
annotations to __initdata.
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>