A look at the code reveals use of S5P_VA_SYSRAM macro, in case of certain SoC
revisions, which is not valid any longer, after SYSRAM started to be mapped
dynamically. The new dynamic mapping is stored in sysram_base_addr variable,
which is declared static in platsmp.c

This fix makes sysram_base_addr non-static, declared it in common.h and used
in pm.c instead of S5P_VA_SYSRAM.
Suggested-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NViresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

No more dependency on the arch code. The platform_data field is used to set the
PM callback as the other cpuidle drivers.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NViresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This macro is only used there.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

The code to initiate and exit the powerdown sequence is the same in
pm.c and cpuidle.c.

Let's split the common part in the pm.c and reuse it from the cpu_pm notifier.

That is one more step forward to make the cpuidle driver arch indenpendant.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NViresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

In order to remove depedency on pm code, let's move the 'exynos_enter_aftr'
function into the pm.c file as well as the other helper functions.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Let's encapsulate the AFTR state specific call into a single function.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

There is no point to register the cpuidle driver for the 5440 as it has only
one WFI state which is the default idle function when the cpuidle driver is
disabled.

By disabling cpuidle we prevent to enter to the governor computation for
nothing, thus saving a lot of processing time.

The only drawback is the statistic via sysfs on this state which is lost but
it is meaningless and it could be retrieved from the ftrace easily.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NAmit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Pass the wakeup mask to 'exynos_set_wakeupmask' as this function could
be used for different idle states with different mask.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

The scu_enable function is already a noop in the scu's header file is
CONFIG_SMP=n, so no need to use these macros in the code.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NViresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

We make the cpuidle code less arch dependent.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NViresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Use the cpu_pm_enter/exit notifier to group some pm code inside the
pm file.

The save and restore code is duplicated across pm.c and cpuidle.c. By
using the cpu_pm notifier, we can factor out the routine.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NViresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This function should be called only when the powerdown sequence fails.

Even if the current code does not hurt, by moving this line, we have
the same code than the one in pm.c.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NViresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Move the code around to differentiate different section of code and
prepare it to be factored out in the next patches.

The call order changed but hat doesn't have a side effect because
they are independent. The important call is cpu_do_idle() which must
be done the last.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NViresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

That makes the code cleaner and encapsulted. The function will be
reused in the next patch.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NViresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

The driver was initially written for exynos4 but the driver is used
also for exynos5.

Change the function prefix name exynos4 -> exynos
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NViresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Use the cpuidle generic function 'cpuidle_register'. That saves us
from some extra lines of code and unneeded variables.

A side effect of this change is a bug fix where before the cpuidle
driver was registered for each_online_cpu and now it is for
each_possible_cpu.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NViresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Move the structure below the 'exynos4_enter_lowpower' function so no
more need of forward declaration.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: NViresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Now with common clock support added for exynos5250 it is necessary to
move this code to exynos5250 common clock driver as clock registers
should be handled there. This change is tested in exynos5250 based
arndale platform.

Cc: Abhilash Kesavan <a.kesavan@samsung.com>
Cc: Thomas Abraham <thomas.abraham@linaro.org>
Acked-by: NKukjin Kim <kgene.kim@samsugn.com>
Reviewed-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
[t.figa: Rebased onto current kernel sources.]
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

The following parameters are no longer needed by the edma driver since the
information can be obtained from the IP's CCCFG register:
n_channel, n_region, n_slot and n_tc.
Remove the initialization of n_cc as well since in this context it has no
meaning. We have separate edma_soc_info struct/eDMA3_CC instance so this
member does not make any sense (and the driver no longer uses it).
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: NSekhar Nori <nsekhar@ti.com>

dma-channels, ti,edma-regions and ti,edma-slots no longer needed in DT since
the the same information is available in the IP's CCCFG register.
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NSekhar Nori <nsekhar@ti.com>

dma-channels, ti,edma-regions and ti,edma-slots no longer needed in DT since
the the same information is available in the IP's CCCFG register.
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NSekhar Nori <nsekhar@ti.com>

From CCCFG register of eDMA3 we can get all the needed information for the
driver about the IP:
Number of channels: NUM_DMACH
Number of regions: NUM_REGN
Number of slots (PaRAM sets): NUM_PAENTRY
Number of TC/EQ: NUM_EVQUE

In case when booted with DT or the queue_priority_mapping is not provided
set up a default priority map.
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: NJoel Fernandes <joelf@ti.com>
Signed-off-by: NSekhar Nori <nsekhar@ti.com>

To be consistent in the code that we take parameters from edma_cc[j] struct
and not randomly from info[j] as well.
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: NSekhar Nori <nsekhar@ti.com>

The struct edma is allocated per CC bases so the member num_cc does not make
any sense. One CC is one CC, it does not have sub CCs.
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: NSekhar Nori <nsekhar@ti.com>

It is ignored by the edma driver since we are just setting back the default
mapping of TC -> Queue.
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: NSekhar Nori <nsekhar@ti.com>

There is no need to change the default TC -> Queue mapping. By default the
mapping is: TC0 -> Q0, TC1 -> Q1, etc.
Changing this has no benefits at all and all the board files are just setting
the same mapping back to the HW.
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: NSekhar Nori <nsekhar@ti.com>

Instead of saving the for loop length, take the num_tc value from the pdata.
In case of DT boot set the n_tc to 3 as it is hardwired in edma_of_parse_dt()
This is a temporary state since upcoming patch(es) will change how we are
dealing with these parameters.
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: NSekhar Nori <nsekhar@ti.com>

The pdata has been just allocated with devm_kzalloc() in
edma_setup_info_from_dt() and passed to this function.
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: NSekhar Nori <nsekhar@ti.com>

Get the two interrupt line number at the same time by merging the two
instance of if(node){}else{} places.
replace the &pdev->dev with the already existing dev which makes it possible
to collapse lines with devm_request_irq()
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: NSekhar Nori <nsekhar@ti.com>

Add machine-dependent MCPM call-backs for Exynos5420. These are used
to power up/down the secondary CPUs during boot, shutdown, s2r and
switching.
Signed-off-by: NThomas Abraham <thomas.ab@samsung.com>
Signed-off-by: NInderpal Singh <inderpal.s@samsung.com>
Signed-off-by: NAndrew Bresticker <abrestic@chromium.org>
Signed-off-by: NAbhilash Kesavan <a.kesavan@samsung.com>
Reviewed-by: NNicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Add device-tree bindings for the ARM CCI-400 on Exynos5420. There
are two slave interfaces: one for the A15 cluster and one for the
A7 cluster.
Signed-off-by: NAndrew Bresticker <abrestic@chromium.org>
Signed-off-by: NAbhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Add generic cluster power control functions for exynos based SoCS
for cluster power up/down and to know the cluster status.
Signed-off-by: NAbhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Use generic exynos cpu power control functions to power up/down
and to know the status of the cpu in platsmp and hotplug code.
Signed-off-by: NLeela Krishna Amudala <leela.krishna@linaro.org>
Signed-off-by: NAbhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Add generic cpu power control functions for exynos based
SoCS for cpu power up/down and to know the cpu status.
Signed-off-by: NLeela Krishna Amudala <leela.krishna@linaro.org>
Signed-off-by: NAbhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Missed some changes during re-sorting this branch.
So fixed it.
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Instead of hardcoding the SYSRAM details for each SoC,
pass this information through device tree (DT) and make
the code SoC agnostic. Generic DT SRAM bindings are
used for achieving this.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NHeiko Stuebner <heiko@sntech.de>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch moves S3C24XX specific clock Kconfig options into
"clk/samsung/Kconfig" and also removes COMMON_CLK selection from
"mach-s3c24xx/Kconfig" as S3C24XX_COMMON_CLK is selecting it's dependency.

CC: Ben Dooks <ben-linux@fluff.org>
CC: Kukjin Kim <kgene.kim@samsung.com>
CC: Russell King <linux@arm.linux.org.uk>
Signed-off-by: NPankaj Dubey <pankaj.dubey@samsung.com>
Signed-off-by: NTomasz Figa <t.figa@samsung.com>