Commit Graph

74 Commits

Author SHA1 Message Date
Tony Lindgren 3da5216725 ARM: OMAP4: Remove legacy IRQ for PRM
We have the PRM IRQ mapped in device tree and this legacy code
is no longer needed.

Cc: Lokesh Vutla <lokeshvutla@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2017-10-10 14:27:13 -07:00
Sergei Shtylyov 879dce7953 ARM: OMAP4+: PRM: fix of_irq_get() result checks
of_irq_get() may return 0 as well as a nagative error number on failure,
(and never on success), however omap44xx_prm_late_init() regards 0 as a
valid IRQ -- fix this.

Fixes: a8f83aefcd ("ARM: OMAP4+: PRM: register interrupt information from DT")
Fixes: c5b3955828 ("ARM: OMAP4: Fix legacy code clean-up regression")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2017-08-15 08:53:28 -07:00
Tony Lindgren c5b3955828 ARM: OMAP4: Fix legacy code clean-up regression
Commit 2a26d31b1b ("ARM: OMAP2+: Remove unused legacy code for PRM")
removed PRM platform init code that I thought is unused. Turns out omap4
still needs this code, so let's do a partial revert to add it back.

I probably missed this earlier as the comments used to say
"OMAP4+ is DT only now" for !of_have_populated_dt() to exit early and
missed the negative test. Let's not add those lines back as they are
confusing and no longer needed as we only boot in device tree mode.

Without things things can mysterious fail for i2c, for example LM75
I2C temperature sensor can stop working as the PRM interrupts won't work.

Fixes: 2a26d31b1b ("ARM: OMAP2+: Remove unused legacy code for PRM")
Signed-off-by: Tony Lindgren <tony@atomide.com>
2017-06-30 03:37:03 -07:00
Tony Lindgren 67d00470ac Merge branch 'omap-for-v4.13/clkctrl' into omap-for-v4.13/soc-v4 2017-06-12 03:27:30 -07:00
Tony Lindgren 2a26d31b1b ARM: OMAP2+: Remove unused legacy code for PRM
We are now booting all mach-omap2 in device tree only mode.
Any code that is only called in legacy boot mode where
of_have_populated_dt() is not set is safe to remove now.

Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2017-06-08 04:15:10 -07:00
Tero Kristo 9012933671 ARM: OMAP2+: PRCM: store also physical addresses for instances
In some cases the physical address info is needed, so store this
under the existing cm*_base, prm_base and prcm_mpu_base variables.
These are converted now to structs that contain both virtual and
physical address base for the instance.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2017-06-06 00:13:51 -07:00
Keerthy cc843711fd ARM: OMAP4+: PRM: Add AM437x specific data
The register offsets for some of the PRM Registers are different
hence populating the differing fields. This is needed to support
IO wake up feature for am437x family.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2015-07-23 06:08:24 -06:00
Keerthy 8d4be7d8bf ARM: OMAP: PRM: Remove hardcoding of IRQENABLE_MPU_2 and IRQSTATUS_MPU_2 register offsets
The register offsets of IRQENABLE_MPU_2 and IRQSTATUS_MPU_2 are hardcoded.
This makes it difficult to reuse the code for SoCs like AM437x that have
a single instance of IRQENABLE_MPU and IRQSTATUS_MPU registers.
Hence handling the case using offset of 4 to accommodate single set of IRQ*
registers generically.

Signed-off-by: Keerthy <j-keerthy@ti.com>
[paul@pwsan.com: fixed whitespace alignment problems reported by checkpatch.pl]
Reviewed-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2015-07-23 06:08:19 -06:00
Keerthy fac03f12f8 ARM: OMAP4: PRM: Remove hardcoding of PRM_IO_PMCTRL_OFFSET register
PRM_IO_PMCTRL_OFFSET need not be same for all SOCs hence
remove hardcoding and use the value provided by the omap_prcm_irq_setup
structure. This is done to support IO wakeup on am437x series.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2015-07-23 05:27:00 -06:00
Linus Torvalds 8b3c8ba3d8 ARM: SoC late changes for v4.1
We were expecting to sit on this branch through most of the merge window since
 the contents was merged into our tree late, but we ended up sitting on all of
 our contents so it can go in with the rest.
 
 The contents here is:
 
 - A large branch of cleanups of the CM/PRM blocks on OMAP.
 - A couple of patches plumbing up CM/PRM on OMAP5 and DRA7.
 - A branch with DT updates for Freescale i.MX. including some shuffling from
   .dts to .dtsi (include) files that causes a little churn.
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Merge tag 'armsoc-late' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC late changes from Olof Johansson:
 "We were expecting to sit on this branch through most of the merge
  window since the contents was merged into our tree late, but we ended
  up sitting on all of our contents so it can go in with the rest.

  The contents here is:

   - a large branch of cleanups of the CM/PRM blocks on OMAP.

   - a couple of patches plumbing up CM/PRM on OMAP5 and DRA7.

   - a branch with DT updates for Freescale i.MX.  including some
     shuffling from .dts to .dtsi (include) files that causes a little
     churn"

* tag 'armsoc-late' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (78 commits)
  ARM: OMAP2+: Fix booting with configs that don't have MFD_SYSCON
  ARM: OMAP4+: control: add support for initializing control module via DT
  ARM: dts: dra7: add minimal l4 bus layout with control module support
  ARM: dts: omap5: add minimal l4 bus layout with control module support
  ARM: OMAP4+: control: remove support for legacy pad read/write
  ARM: OMAP4: display: convert display to use syscon for dsi muxing
  ARM: dts: omap4: add minimal l4 bus layout with control module support
  ARM: dts: am4372: add minimal l4 bus layout with control module support
  ARM: dts: am43xx-epos-evm: fix pinmux node layout
  ARM: dts: am33xx: add minimal l4 bus layout with control module support
  ARM: dts: omap3: add minimal l4 bus layout with control module support
  ARM: dts: omap24xx: add minimal l4 bus layout with control module support
  ARM: OMAP2+: control: add syscon support for register accesses
  ARM: OMAP2+: id: cache omap_type value
  ARM: OMAP2+: control: remove API for getting control module base address
  ARM: OMAP2+: clock: add low-level support for regmap
  ARM: OMAP4+: PRM: get rid of cpu_is_omap44xx calls from interrupt init
  ARM: OMAP4+: PRM: setup prm_features from the PRM init time flags
  ARM: OMAP2+: CM: move SoC specific init calls within a generic API
  ARM: OMAP4+: PRM: determine prm_device_inst based on DT compatibility
  ...
2015-04-22 09:24:55 -07:00
Tero Kristo 219595b6ee ARM: OMAP4+: PRM: get rid of cpu_is_omap44xx calls from interrupt init
The compatible DT node is now passed with the prm init, so there is no
need to do node matching here again. Added a new flag to the init data
also, to detect default IRQ support for OMAP4. Also, any booting omap4
DT setup always has a PRM node, so there is no need to check against
the special case where it would be missing.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
2015-03-31 21:26:53 +03:00
Tero Kristo 8b5b9a22b5 ARM: OMAP4+: PRM: setup prm_features from the PRM init time flags
Currently some cpu_is_X checks are used to setup prm_features, however
the same can be accomplished by just passing these flags from the PRM
init data. This is done in preparation to make PRM a separate driver.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
2015-03-31 21:26:52 +03:00
Tero Kristo 48e0c1148d ARM: OMAP4+: PRM: determine prm_device_inst based on DT compatibility
PRM device instance offset is now provided through the prm_init_data.
This gets rid of some cpu_is_X / soc_is_X calls from PRM core code,
preparing for PRM to be its own separate driver.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
2015-03-31 21:26:44 +03:00
Tero Kristo ab7b2ffcf5 ARM: OMAP2+: PRM: move SoC specific init calls within a generic API
This gets rid of need for some exported driver APIs, and simplifies the
initialization of the PRM driver. Done in preparation to make PRM a
separate driver. The init data is now also passed to the SoC specific
implementations, allowing future expansion to add feature flags etc.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
2015-03-31 21:26:36 +03:00
Tero Kristo ae521d4d9c ARM: OMAP2+: PRM: determine PRM base address from device tree
There is no need to provide the PRM base address through a low-level API
from the low-level IO init, as this information is available through DT.
Re-routed the parsing function to be called from the PRM drivers also to
simplify the implementation under io.c.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
2015-03-27 10:55:58 +02:00
Tero Kristo 4e3870f3f6 ARM: OMAP4+: PRM: move omap_prm_base_init under OMAP4 PRM driver
There is no need to call this separately from io.c, rather this can be
done commonly under the PRM driver.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
2015-03-25 11:03:40 +02:00
Tero Kristo e9f1ddcdec ARM: OMAP3+: PRM: add common APIs for prm_vp_check/clear_txdone
PRM driver now only exports a generic API for clearing / checking
VP txdone status.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
2015-03-25 11:03:39 +02:00
Tero Kristo 50f59d07e9 ARM: OMAP4+: PRM: fix omap4 version of prm_save_and_clear_irqen
This was incorrectly reading the irq status registers during the save
and clear, instead of the irq enable. This worked because there is only
one user for the prcm interrupts currently, namely the io-chain. Whenever
the function was called, an io-chain interrupt was both pending and
enabled.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2015-03-01 16:58:25 -07:00
Uwe Kleine-König 444d2d33d8 ARM: make of_device_ids const
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: Jason Cooper <jason@lakedameon.net>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2015-02-19 09:44:25 +01:00
Marc Zyngier 0fb22a8fb7 ARM: OMAP: Work around hardcoded interrupts
Commit 9a1091ef00 ("irqchip: gic: Support hierarchy irq domain")
changed the GIC driver to use a non-legacy IRQ domain on DT
platforms. This patch assumes that DT-driven systems are getting
all of their interrupts from device tree.

Turns out that OMAP has quite a few hidden gems, and still uses
hardcoded interrupts despite having fairly complete DTs.

This patch attempts to work around these by offering a translation
method that can be called directly from the hwmod code, if present.
The same hack is sprinkled over PRCM and TWL.

It isn't pretty, but it seems to do the job without having to add
more hacks to the interrupt controller code.

Tested on OMAP4 (Panda-ES) and OMAP5 (UEVM5432).

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Nishanth Menon <nm@ti.com>
[tony@atomide.com: updated to fix make randconfig issue]
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-01-17 08:56:12 -08:00
Tero Kristo 61c8621e2b ARM: OMAP2+: PRM: provide generic API for system reset
This patch combines the various prm_warm_reset calls under a common
API prm_reset_system, and adds the SoC specific implementation under
prm_ll_data.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-10-27 08:39:26 -07:00
Tero Kristo 4984eeaf71 ARM: OMAP3+: PRM: add generic API for reconfiguring I/O chain
This adds a generic API for reconfiguring the I/O chain. The implementation
will call the SoC specific function registered during init time. The SoC
specific reconfigure functions are also made static, as they don't need
to be accessed outside the PRM driver itself.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Nishanth Menon <nm@ti.com>
[tony@atomide.com: updated for recent omap3 prcm fixes]
Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-10-27 08:39:26 -07:00
Tero Kristo 28db51f428 ARM: OMAP4: PRM: make PRCM interrupt handler related functions static
These are not needed outside the PRM driver, so make them static and
remove the prototypes from the public header.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-10-27 08:39:26 -07:00
Tero Kristo f3f220f046 ARM: OMAP4: PRM: make omap4_prm_read/write_inst_reg calls static
These are not (and should not be) used by anybody outside the PRM
driver itself.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-10-27 08:39:26 -07:00
Tero Kristo 1bc28b3472 ARM: OMAP2+: PRM: add generic API for checking hardreset status
PRM driver now has a generic API for checking hardreset status. SoC
specific support functions are registered through the prm_ll_data.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-10-27 08:39:25 -07:00
Tero Kristo 37fb59d7e0 ARM: OMAP2+: PRM: add generic API for deasserting hardware reset
PRM driver now has a generic API for deasserting hardware resets. SoC
specific support functions are registered through the prm_ll_data.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-10-27 08:39:25 -07:00
Tero Kristo efd44dc35f ARM: OMAP2+: PRM: add generic API for asserting hardware reset
PRM driver now has a generic API for asserting hardware resets. SoC
specific support functions are registered through the prm_ll_data.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-10-27 08:39:24 -07:00
Tero Kristo 3381eb47f3 ARM: DRA7: PRM: add voltage processor check behind a prm_feature flag
This is done in attempt to get rid of cpu_is_X calls from the PRM core.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-10-27 08:39:23 -07:00
Nishanth Menon 2aba071c50 ARM: OMAP4+: PRM: Enable wakeup capability for OMAP5, DRA7
OMAP5 and DRA7 can now use pinctrl based I/O daisychain wakeup
capability. So, enable the support.

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2014-09-08 10:53:56 -05:00
Nishanth Menon a6903ea301 ARM: OMAP4+: PRM: remove "wkup" event
"wkup" event at bit offset 0 exists only on OMAP3.
OMAP4430/60 PRM_IRQSTATUS_A9, OMAP5/DRA7 PRM_IRQSTATUS_MPU

register bit 0 is DPLL_CORE_RECAL_ST not wakeup event like OMAP3.

The same applies to AM437x as well.

Remove the wrong definition.

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2014-09-08 10:53:50 -05:00
Nishanth Menon a8f83aefcd ARM: OMAP4+: PRM: register interrupt information from DT
Allow the PRM interrupt information to be picked up from device tree.
the only exception is for OMAP4 which uses values pre-populated and allows
compatibility with older dtb.

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2014-09-08 10:53:45 -05:00
Nishanth Menon 390ddc19e2 ARM: OMAP4: PRM: use the generic prm_inst to allow logic to be abstracted
use the generic function to pick up the prm_instance for a generic logic
which can be reused from OMAP4+

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2014-09-08 10:53:39 -05:00
Tony Lindgren ea351c1603 Some OMAP PRCM cleanup patches. These help prepare to convert the PRCM
code into drivers.
 
 Basic build, boot, and PM test results are available here:
 
 http://www.pwsan.com/omap/testlogs/prcm-cleanup-v3.16/20140515213244/
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Merge tag 'for-v3.16/prcm-cleanup-a' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending into omap-for-v3.16/prcm

Some OMAP PRCM cleanup patches.  These help prepare to convert the PRCM
code into drivers.

Basic build, boot, and PM test results are available here:

http://www.pwsan.com/omap/testlogs/prcm-cleanup-v3.16/20140515213244/

Conflicts:
	arch/arm/mach-omap2/cm3xxx.c
	arch/arm/mach-omap2/cm44xx.c

Also fixed up new section mismatch warnings.
2014-05-16 15:26:22 -07:00
Tero Kristo b550e47f5e ARM: OMAP3/4: PRM: add support of late_init call to prm_ll_ops
SoC specific late_init call is now registered during PRM init, and will
be called automatically by PRM core. This helps to get rid of some
redundant initcalls and cpu_is_X checks from the PRM code.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2014-05-15 22:35:04 -06:00
Tero Kristo 2541d15f16 ARM: OMAP3/OMAP4: PRM: add prm_features flags and add IO wakeup under it
prm_features flag will contain SoC specific feature enabler flags. Initially
IO wakeup is added under this. Helps to get rid of runtime cpu_is_X checks.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2014-05-15 22:34:58 -06:00
Tero Kristo 81243651ba ARM: OMAP3/4: PRM: provide io chain reconfig function through irq setup
This helps to make the PRM registration modular, and also gets rid of a
cpu type check done later.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2014-05-15 22:34:54 -06:00
Tero Kristo d8871cd245 ARM: OMAP2+: PRM: remove unnecessary cpu_is_XXX calls from prm_init / exit
Done in preparation to make PRM its own driver, as the cpu_is_XXX calls are
not available outside mach-omap2 folder.

The init functions are called only from cpu specific init chain, and thus
don't need to double check against cpu type.

The exit calls check against the data provided during init-time registration
and thus don't need cpu check either.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
[paul@pwsan.com: updated to apply]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2014-05-15 22:34:51 -06:00
Victor Kamensky edfaf05c2f ARM: OMAP2+: raw read and write endian fix
All OMAP IP blocks expect LE data, but CPU may operate in BE mode.
Need to use endian neutral functions to read/write h/w registers.
I.e instead of __raw_read[lw] and __raw_write[lw] functions code
need to use read[lw]_relaxed and write[lw]_relaxed functions.
If the first simply reads/writes register, the second will byteswap
it if host operates in BE mode.

Changes are trivial sed like replacement of __raw_xxx functions
with xxx_relaxed variant.

Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
Signed-off-by: Taras Kondratiuk <taras.kondratiuk@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-05-08 07:09:53 -07:00
Ambresh K 7de516a63c ARM: OMAP: DRA7: Enable PM framework initializations
Initialise powerdomains, clockdomains, and hwmod frameworks.

Signed-off-by: Ambresh K <ambresh@ti.com>
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: updated to apply]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2013-08-23 04:29:37 -06:00
Rajendra Nayak 9a4e301d0c ARM: OMAP: DRA7: powerdomain: Handle missing vc/vp
DRA7 belongs to the omap4plus devices which reuse the omap4_pwrdm_operations
ops for powerdomain control. DRA7 however has no VC/VP while all the
earlier omap4plus devices did.

So use the .pwrdm_has_voltdm() ops to pass this info on to the core.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2013-08-23 04:28:36 -06:00
Tero Kristo 077173c0aa ARM: OMAP5: Reuse prm read_inst/write_inst
Make use of 'prm_base' so that  prm read_inst/write_inst can work on
OMAP5 devices.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2013-03-19 12:57:00 +05:30
Santosh Shilimkar 7515148af9 ARM: OMAP5: prm: Allow prm init to succeed
Allow prm init to succeed on OMAP5 SOCs.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2013-03-19 12:57:00 +05:30
Tony Lindgren b76c8b19b0 ARM: OMAP2+: Use omap initcalls
This way the initcalls don't run on other SoCs on multiplatform
kernels. Otherwise we'll get something like this when booting
on vexpress:

omap_hwmod: _ensure_mpu_hwmod_is_setup: MPU initiator hwmod mpu not yet registered
...
WARNING: at arch/arm/mach-omap2/pm.c:82 _init_omap_device+0x74/0x94()
_init_omap_device: could not find omap_hwmod for mpu
...
omap-dma-engine omap-dma-engine: OMAP DMA engine driver
...

Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2013-01-11 11:24:18 -08:00
Ivan Khoronzhuk d7eccab909 ARM: OMAP4: PRM: Correct wrong instance usage for reading reset sources
To read reset sources registers we have to use PRM_DEVICE_INST

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2013-01-02 12:07:16 -07:00
Ivan Khoronzhuk 62bafd1a8f ARM: OMAP4: PRM: Correct reset source map
In the map for reset sources register we use defines intended for
using with PRM_RSTCTRL register. So fix it.

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2013-01-02 12:07:16 -07:00
Rajendra Nayak e6d3a8b0bd ARM: OMAP2+: hwmod: Add support for per hwmod/module context lost count
OMAP4 has module specific context lost registers which makes it now
possible to have module level context loss count, instead of relying
on the powerdomain level context count.

Add 2 private hwmod api's to update/clear the hwmod/module specific
context lost counters/register.

Update the module specific context_lost_counter and clear the hardware
bits just after enabling the module.

omap_hwmod_get_context_loss_count() now returns the hwmod context loss
count them on platforms where they exist (OMAP4), else fall back on
the pwrdm level counters for older platforms.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: added function kerneldoc, fixed structure kerneldoc,
 rearranged structure to avoid memory waste, marked fns as OMAP4-specific,
 prevent fn entry on non-OMAP4 chips, reduced indentation, merged update
 and clear, merged patches]
[t-kristo@ti.com: added support for arch specific hwmod ops, and changed
 the no context offset indicator to USHRT_MAX]
Signed-off-by: Tero Kristo <t-kristo@ti.com>
[paul@pwsan.com: use NO_CONTEXT_LOSS_BIT flag rather than USHRT_MAX;
 convert unsigned context lost counter to int to match the return type;
 get rid of hwmod_ops in favor of the existing soc_ops mechanism;
 move context loss low-level accesses to the PRM code]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2012-11-21 16:15:17 -07:00
Paul Walmsley 63a293e000 ARM: OMAP2+: PRM: initialize some PRM functions early
Some PRM functions will need to be called by the hwmod code early in
kernel init.  To handle this, split the PRM initialization code into
early and late phases.  The early init is handled via mach-omap2/io.c,
while the late init is handled by subsys_initcall().

Signed-off-by: Paul Walmsley <paul@pwsan.com>
2012-11-21 16:15:16 -07:00
Paul Walmsley b99db36cdf ARM: OMAP2+: PRCM: remove obsolete prcm.[ch]
arch/arm/mach-omap2/prcm.c and arch/arm/plat-omap/include/plat/prcm.h
are now completely unused and can be removed.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Vaibhav Hiremath <hvaibhav@ti.com>
2012-11-08 15:09:26 -07:00
Paul Walmsley 2bb2a5d30a ARM: OMAP2+: PRM: create PRM reset source API for the watchdog timer driver
The OMAP watchdog timer driver needs to determine what caused the SoC
to reset for its GETBOOTSTATUS ioctl.  So, define a set of standard
reset sources across OMAP SoCs.  For OMAP2xxx, 3xxx, and 4xxx SoCs,
define mappings from the SoC-specific reset source register bits to
the standardized reset source IDs.  Create SoC-specific PRM functions
that read the appropriate per-SoC register and use the mapping to
return the standardized reset bits.  Register the SoC-specific PRM
functions with the common PRM code via prm_register().  Create a
function in the common PRM code, prm_read_reset_sources(), that
calls the SoC-specific function, registered during boot.

This patch does not yet handle some SoCs, such as AM33xx.  Those SoCs
were not handled by the code this will replace.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
2012-10-21 01:01:13 -06:00
Paul Walmsley 498153995b ARM: OMAP2+: powerdomain/PRM: move the low-level powerdomain functions into PRM
Move the low-level SoC-specific powerdomain control functions into
prm*.c.  For example, OMAP2xxx low-level powerdomain functions go into
prm2xxx.c.  Then remove the unnecessary powerdomain*xxx*.c files.

The objective is to centralize low-level PRM register accesses into
the prm*.[ch] files, and then to export an OMAP SoC-independent API to
higher-level OMAP power management code.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Rajendra Nayak <rnayak@ti.com>
Cc: Vaibhav Hiremath <hvaibhav@ti.com>
Acked-by: Rajendra Nayak <rnayak@ti.com>
Reviewed-by: Russ Dill <Russ.Dill@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2012-10-21 01:01:10 -06:00