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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 jumplabel changes from Peter Anvin:
"One more x86 tree for this merge window. This tree improves the
handling of jump labels, so that most of the time we don't have to do
a massive initial patching run.
Furthermore, we will error out of the jump label is not what is
expected, eg if it has been corrupted or tampered with"
* 'x86/jumplabel' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/jump-label: Show where and what was wrong on errors
x86/jump-label: Add safety checks to jump label conversions
x86/jump-label: Do not bother updating nops if they are correct
x86/jump-label: Use best default nops for inital jump label calls
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When modifying text sections for jump labels, a paranoid check is
performed. If the check fails, the system "bugs". But why it failed
is not shown.
The BUG_ON()s in the jump label update code is replaced with bug_at(ip).
This is a function that will show what pointer failed, and what was
at the location of the failure that made jump label panic.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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As with all modifying of kernel text, we need to be very paranoid.
When converting the jump label locations to and from nops to jumps
a check has been added to make sure what we are replacing is what we
expect, otherwise we bug.
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jason Baron <jbaron@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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On boot up, the jump label init function scans all the jump label locations
and converts them to the best nop for the machine. If the nop is already
the ideal nop, do not bother with changing it.
Cc: Jason Baron <jbaron@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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As specified by H. Peter Anvin, the best nops for x86 without knowing
the running computer is:
32bit:
0x3e, 0x8d, 0x74, 0x26, 0x00 also known as GENERIC_NOP5_ATOMIC
64bit:
0x0f, 0x1f, 0x44, 0x00, 0x00 also known as P6_NOP5_ATOMIC
Currently the default nop that is used by jump label is:
0xe9 0x00 0x00 0x00 0x00
Which is really a 5byte jump to the next position.
It's better to use a real nop than a jmp.
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: Jason Baron <jbaron@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Pull CRIS updates from Jesper Nilsson:
"Mostly cleanup and removal of unused configs"
* tag 'cris-for-3.12' of git://jni.nu/cris:
CRIS: drop unused Kconfig symbols
CRIS: Add kvm_para.h which includes generic file
CRIS: remove unused current_regs
CRIS: Remove last traces of legacy RTC drivers
CRIS: remove "config OOM_REBOOT"
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Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
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Copied from frv.
Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
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CC: Mikael Starvik <starvik@axis.com>
CC: linux-cris-kernel@axis.com
Signed-off-by: Jonas Bonn <jonas@southpole.se>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
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These legacy drivers were removed in commit
9c75fc8c5c8c50775fc8b89418219221335b758f ("CRIS: Remove legacy RTC
drivers"). Now remove their last traces in two Kconfig files and one
Makefile.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Jesper Nilsson <jespern@axis.com>
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The Kconfig symbol OOM_REBOOT got added in v2.6.25. It has never been
used. Its entry can safely be removed.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
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The mn10300 kernel crashes just after starting userspace programs, if
CONFIG_PREEMPT is disabled:
Freeing unused kernel memory: 96K (90286000 - 9029e000)
MISALIGN: 97c33ff9: unsupported instruction f
MISALIGN: 97c33ff9: unsupported instruction f
MISALIGN: 97c33ff9: unsupported instruction f
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This fixes the problem that was introduced by commit d17fc238ac14
("MN10300: Enable IRQs more in system call exit work path").
Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull device tree core updates from Grant Likely:
"Generally minor changes. A bunch of bug fixes, particularly for
initialization and some refactoring. Most notable change if feeding
the entire flattened tree into the random pool at boot. May not be
significant, but shouldn't hurt either"
Tim Bird questions whether the boot time cost of the random feeding may
be noticeable. And "add_device_randomness()" is definitely not some
speed deamon of a function.
* tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux:
of/platform: add error reporting to of_amba_device_create()
irq/of: Fix comment typo for irq_of_parse_and_map
of: Feed entire flattened device tree into the random pool
of/fdt: Clean up casting in unflattening path
of/fdt: Remove duplicate memory clearing on FDT unflattening
gpio: implement gpio-ranges binding document fix
of: call __of_parse_phandle_with_args from of_parse_phandle
of: introduce of_parse_phandle_with_fixed_args
of: move of_parse_phandle()
of: move documentation of of_parse_phandle_with_args
of: Fix missing memory initialization on FDT unflattening
of: consolidate definition of early_init_dt_alloc_memory_arch()
of: Make of_get_phy_mode() return int i.s.o. const int
include: dt-binding: input: create a DT header defining key codes.
of/platform: Staticize of_platform_device_create_pdata()
of: Specify initrd location using 64-bit
dt: Typo fix
OF: make of_property_for_each_{u32|string}() use parameters if OF is not enabled
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Most architectures use the same implementation. Collapse the common ones
into a single weak function that can be overridden.
Signed-off-by: Grant Likely <grant.likely@linaro.org>
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Linux 3.11-rc7
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On some PAE architectures, the entire range of physical memory could reside
outside the 32-bit limit. These systems need the ability to specify the
initrd location using 64-bit numbers.
This patch globally modifies the early_init_dt_setup_initrd_arch() function to
use 64-bit numbers instead of the current unsigned long.
There has been quite a bit of debate about whether to use u64 or phys_addr_t.
It was concluded to stick to u64 to be consistent with rest of the device
tree code. As summarized by Geert, "The address to load the initrd is decided
by the bootloader/user and set at that point later in time. The dtb should not
be tied to the kernel you are booting"
More details on the discussion can be found here:
https://lkml.org/lkml/2013/6/20/690
https://lkml.org/lkml/2012/9/13/544
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
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Pull slave-dmaengine updates from Vinod Koul:
"This pull brings:
- Andy's DW driver updates
- Guennadi's sh driver updates
- Pl08x driver fixes from Tomasz & Alban
- Improvements to mmp_pdma by Daniel
- TI EDMA fixes by Joel
- New drivers:
- Hisilicon k3dma driver
- Renesas rcar dma driver
- New API for publishing slave driver capablities
- Various fixes across the subsystem by Andy, Jingoo, Sachin etc..."
* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (94 commits)
dma: edma: Remove limits on number of slots
dma: edma: Leave linked to Null slot instead of DUMMY slot
dma: edma: Find missed events and issue them
ARM: edma: Add function to manually trigger an EDMA channel
dma: edma: Write out and handle MAX_NR_SG at a given time
dma: edma: Setup parameters to DMA MAX_NR_SG at a time
dmaengine: pl330: use dma_set_max_seg_size to set the sg limit
dmaengine: dma_slave_caps: remove sg entries
dma: replace devm_request_and_ioremap by devm_ioremap_resource
dma: ste_dma40: Fix potential null pointer dereference
dma: ste_dma40: Remove duplicate const
dma: imx-dma: Remove redundant NULL check
dma: dmagengine: fix function names in comments
dma: add driver for R-Car HPB-DMAC
dma: k3dma: use devm_ioremap_resource() instead of devm_request_and_ioremap()
dma: imx-sdma: Staticize sdma_driver_data structures
pch_dma: Add MODULE_DEVICE_TABLE
dmaengine: PL08x: Add cyclic transfer support
dmaengine: PL08x: Fix reading the byte count in cctl
dmaengine: PL08x: Add support for different maximum transfer size
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Manual trigger for events missed as a result of splitting a
scatter gather list and DMA'ing it in batches. Add a helper
function to trigger a channel incase any such events are missed.
Signed-off-by: Joel Fernandes <joelf@ti.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Now that the sdma driver holds the address tables for i.MX25/5 they
are no longer needed in platform_data. Remove them.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc
Pull MMC updates from Chris Ball:
"MMC highlights for 3.12:
Core:
- Support Allocation Units 8MB-64MB in SD3.0, previous max was 4MB.
- The slot-gpio helper can now handle GPIO debouncing card-detect.
- Read supported voltages from DT "voltage-ranges" property.
Drivers:
- dw_mmc: Add support for ARC architecture, and support exynos5420.
- mmc_spi: Support CD/RO GPIOs.
- sh_mobile_sdhi: Add compatibility for more Renesas SoCs.
- sh_mmcif: Add DT support for DMA channels"
* tag 'mmc-updates-for-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (50 commits)
Revert "mmc: tmio-mmc: Remove .set_pwr() callback from platform data"
mmc: dw_mmc: Add support for ARC
mmc: sdhci-s3c: initialize host->quirks2 for using quirks2
mmc: sdhci-s3c: fix the wrong register value, when clock is disabled
mmc: esdhc: add support to get voltage from device-tree
mmc: sdhci: get voltage from sdhc host
mmc: core: parse voltage from device-tree
mmc: omap_hsmmc: use the generic config for omap2plus devices
mmc: omap_hsmmc: clear status flags before starting a new command
mmc: dw_mmc: exynos: Add a new compatible string for exynos5420
mmc: sh_mmcif: revision-specific CLK_CTRL2 handling
mmc: sh_mmcif: revision-specific Command Completion Signal handling
mmc: sh_mmcif: add support for Device Tree DMA bindings
mmc: sh_mmcif: move header include from header into .c
mmc: SDHI: add DT compatibility strings for further SoCs
mmc: dw_mmc-pci: enable bus-mastering mode
mmc: dw_mmc-pci: get resources from a proper BAR
mmc: tmio-mmc: Remove .set_pwr() callback from platform data
mmc: tmio-mmc: Remove .get_cd() callback from platform data
mmc: sh_mobile_sdhi: Remove .set_pwr() callback from platform data
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The MMCIF and SHDI platform data .set_pwr() callbacks are used to
control the vmmc/vqmmc power supplies. As the power supplies already
register control GPIOs there's no need to perform the operation
manually. Remove the callback functions.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
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The callback isn't used by the mmcif driver, don't initialize it in
board code.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
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Pass the CD and RO GPIO numbers to the MMC SPI and SDHI drivers and
remove the custom .get_cd() and .get_ro() callback functions.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
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Pass the CD and RO GPIO numbers to the MMC SPI driver and remove the
custom .get_cd() and .get_ro() callback functions.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC late changes from Kevin Hilman:
"These are changes that arrived a little late before the merge window,
or had dependencies on previous branches.
Highlights:
- ux500: misc. cleanup, fixup I2C devices
- exynos: DT updates for RTC; PM updates
- at91: DT updates for NAND; new platforms added to generic defconfig
- sunxi: DT updates: cubieboard2, pinctrl driver, gated clocks
- highbank: LPAE fixes, select necessary ARM errata
- omap: PM fixes and improvements; OMAP5 mailbox support
- omap: basic support for new DRA7xx SoCs"
* tag 'late-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (60 commits)
ARM: dts: vexpress: Add CCI node to TC2 device-tree
ARM: EXYNOS: Skip C1 cpuidle state for exynos5440
ARM: EXYNOS: always enable PM domains support for EXYNOS4X12
ARM: highbank: clean-up some unused includes
ARM: sun7i: Enable the A20 clocks in the DTSI
ARM: sun6i: Enable clock support in the DTSI
ARM: sun5i: dt: Use the A10s gates in the DTSI
ARM: at91: at91_dt_defconfig: enable rm9200 support
ARM: dts: add ADC device tree node for exynos5420/5250
ARM: dts: Add RTC DT node to Exynos5420 SoC
ARM: dts: Update the "status" property of RTC DT node for Exynos5250 SoC
ARM: dts: Fix the RTC DT node name for Exynos5250
irqchip: mmp: avoid to include irqs head file
ARM: mmp: avoid to include head file in mach-mmp
irqchip: mmp: support irqchip
irqchip: move mmp irq driver
ARM: OMAP: AM33xx: clock: Add RNG clock data
ARM: OMAP: TI81XX: add always-on powerdomain for TI81XX
ARM: OMAP4: clock: Lock PLLs in the right sequence
ARM: OMAP: AM33XX: hwmod: Add hwmod data for debugSS
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The Versatile Express V2P-CA15_A7 (aka TC2) has a CCI-400 which is
needed to get Multi-Cluster Power Management (MCPM) working.
Signed-off-by: Jon Medhurst <tixy@linaro.org>
Acked-by: Pawel Moll <pawel.moll@arm.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into late/all
From Tony Lindgren:
Add basic support for devices on dra7xx by adding the PRCM and hwmod
parts the same way as for other omaps. This is still needed in
addition to device tree support for things like power management.
Via Paul Walmsley <paul@pwsan.com>:
This series adds basic TI DRA7xx PRCM and hwmod support.
Basic test logs are available here:
http://www.pwsan.com/omap/testlogs/dra7xx_prcm_devel_v3.12/20130823050445/
Note that DRA7xx could not be tested locally, since I don't have a board.
* tag 'omap-for-v3.12/dra7xx-prcm' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP: DRA7: Enable PM framework initializations
ARM: OMAP: DRA7: hwmod: Create initial DRA7XX SoC data
ARM: OMAP: DRA7: Reuse the omap44xx_restart and fix the device instance
ARM: OMAP: DRA7: powerdomain: Handle missing vc/vp
ARM: OMAP: DRA7: powerdomain: Add DRA7XX data and update header
ARM: OMAP: DRA7: clockdomain: Add DRA7XX data and update header
ARM: OMAP: DRA7: PRCM: Add DRA7XX local MPU PRCM regsiters
ARM: OMAP: DRA7: CM: Add minimal regbit shifts
ARM: OMAP: DRA7: CM: Add DRA7XX register defines
ARM: OMAP: DRA7: PRM: Add DRA7XX register definitions
ARM: DRA7: Add the build support in omap2plus
ARM: DRA7: hwmod: Reuse the soc_ops used for OMAP4/5
ARM: DRA7: id: Add cpu detection support for DRA7xx based SoCs'
ARM: DRA7: Kconfig: Make ARCH_NR_GPIO default to 512
ARM: DRA7: board-generic: Add basic DT support
ARM: DRA7: Resue the clocksource, clockevent support
ARM: DRA7: Reuse io tables and add a new .init_early
ARM: DRA7: Reuse all of PRCM and MPUSS SMP infra
Signed-off-by: Olof Johansson <olof@lixom.net>
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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>
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Adding the hwmod data for DRA7XX platforms.
Signed-off-by: Ambresh K <ambresh@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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The omap44xx_restart used on omap4 and omap5 devices can be reused
on dra7 devices as well. The device instance however is different
across omap5 and dra7 as compared to omap4. So fix this for omap5
as well as dra7.
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: R Sricharan <r.sricharan@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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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>
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Add the data file to describe all power domains inside the DRA7XX SoC.
Signed-off-by: Ambresh K <ambresh@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: added generation notation to comments]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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Add the data file to describe all clock domains inside the DRA7XX SoC
Signed-off-by: Ambresh K <ambresh@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: added generation notation to comments]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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Add the PRCM MPU registers for DRA7XX platforms
Signed-off-by: Ambresh K <ambresh@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: added generation notation to comments]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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This header contains minimal regbits that are currently used in code.
This header has traditionally been autogenerated on OMAP4+ devices but
the autogenerated contents are largely (95%) unused and hence to reduce
unsued data in the kernel this header has been cut down (from the autogen
output) to whatever is currently needed. This is done by running a cleanup
script on top of the existing autogen script.
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Ambresh K <ambresh@ti.com>
[paul@pwsan.com: added generation notation in the comments]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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Add the new defines for DRA7XX CM registers.
Signed-off-by: Ambresh K <ambresh@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: added generation notation in comments]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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Add the new defines for DRA7xx prm module registers.
Signed-off-by: Ambresh K <ambresh@ti.com>
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: added generation notation in the comments]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into late/all
From Tony Lindgren:
OMAP PRCM and hwmod fixes and improvments via Paul Walmsley <paul@pwsan.com>:
Various OMAP PRCM & hwmod fixes and improvements. Notable changes
include:
- a fix for OMAP4 PLL locking to avoid a bootloader dependency that
causes nasty log spew on startup
- AM33xx DEBUGSS support fixes in hwmod data
- OMAP5 mailbox support in hwmod data
Basic test logs are here:
http://www.pwsan.com/omap/testlogs/prcm_a_for_v3.12/20130823125002/
Note that the 3530 failure is due to the mysterious transient serial
issue affecting 3530 for several releases now, which causes a log
parsing failure. PM still seems to work.
* tag 'omap-for-v3.12/prcm-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP: AM33xx: clock: Add RNG clock data
ARM: OMAP: TI81XX: add always-on powerdomain for TI81XX
ARM: OMAP4: clock: Lock PLLs in the right sequence
ARM: OMAP: AM33XX: hwmod: Add hwmod data for debugSS
ARM: OMAP2+: Only write the sysconfig on idle when necessary
ARM: OMAP5: hwmod data: Add mailbox data
Signed-off-by: Olof Johansson <olof@lixom.net>
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'am33xx_devel_v3.12' into prcm_a_for_v3.12
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Add clock data for RNG module on AM33xx SoC.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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In the original hwmod data file, DebugSS entry was disabled,
since we didn't (and do not) have SW to control it.
This patch enables it back with right data, so that it can be
controlled by different ways; and the suggested method it to
have modular driver for debugSS as well.
Refer to the link for more discussion on handling of debugSS -
https://patchwork.kernel.org/patch/2212111/
Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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This patch adds alwon powerdomain support for TI81XX, which is required
for stable functioning of a big number of TI81XX subsystems.
Signed-off-by: Aida Mynzhasova <aida.mynzhasova@skitlab.ru>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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On OMAP4 we have clk_set_rate()s being done for a few
DPLL clock nodes, as part of the clock init code, since
the bootloaders no longer locks these DPLLs.
So we have a clk_set_rate() done for a ABE DPLL node (which
inturn locks it) followed by a clk_set_rate() for the USB DPLL.
With USB DPLL being in bypass, we have this parent->child
relationship thats formed while the clocks get registered.
dpll_abe_ck
|
V
dpll_abe_x2_ck
|
V
dpll_abe_m3x2_ck
|
V
usb_hs_clk_div_ck
|
V
dpll_usb_ck
This is because usb_hs_clk_div_ck is bypass clock for dpll_usb_ck.
So with this parent->child relationship in place, a clk_set_rate()
on ABE DPLL results eventually in a clk_set_rate() call on USB DPLL,
because CCF does a clk_change_rate() (as part of clk_set_rate()) on
all downstream clocks resulting from a rate change on the top clock.
So its important that we lock USB DPLL before we lock ABE DPLL.
Without which we see these error logs at boot.
[These error logs will not be seen if using a bootloader that locks
USB DPLL]
[ 0.000000] clock: dpll_usb_ck failed transition to 'locked'
[ 0.000000] Division by zero in kernel.
[ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.10.0-03445-gfb2af00-dirty #7
[ 0.000000] [<c001bfe8>] (unwind_backtrace+0x0/0xf4) from [<c001868c>] (show_stack+0x10/0x14)
[ 0.000000] [<c001868c>] (show_stack+0x10/0x14) from [<c02deb28>] (Ldiv0+0x8/0x10)
[ 0.000000] [<c02deb28>] (Ldiv0+0x8/0x10) from [<c0477030>] (clk_divider_set_rate+0x10/0x114)
[ 0.000000] [<c0477030>] (clk_divider_set_rate+0x10/0x114) from [<c0476ef4>] (clk_change_rate+0x38/0xb8)
[ 0.000000] [<c0476ef4>] (clk_change_rate+0x38/0xb8) from [<c0476f5c>] (clk_change_rate+0xa0/0xb8)
[ 0.000000] Division by zero in kernel.
[ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.10.0-03445-gfb2af00-dirty #7
[ 0.000000] [<c001bfe8>] (unwind_backtrace+0x0/0xf4) from [<c001868c>] (show_stack+0x10/0x14)
[ 0.000000] [<c001868c>] (show_stack+0x10/0x14) from [<c02deb28>] (Ldiv0+0x8/0x10)
[ 0.000000] [<c02deb28>] (Ldiv0+0x8/0x10) from [<c0477030>] (clk_divider_set_rate+0x10/0x114)
[ 0.000000] [<c0477030>] (clk_divider_set_rate+0x10/0x114) from [<c0476ef4>] (clk_change_rate+0x38/0xb8)
[ 0.000000] [<c0476ef4>] (clk_change_rate+0x38/0xb8) from [<c0476f5c>] (clk_change_rate+0xa0/0xb8)
[ 0.000000] Division by zero in kernel.
[ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.10.0-03445-gfb2af00-dirty #7
[ 0.000000] [<c001bfe8>] (unwind_backtrace+0x0/0xf4) from [<c001868c>] (show_stack+0x10/0x14)
[ 0.000000] [<c001868c>] (show_stack+0x10/0x14) from [<c02deb28>] (Ldiv0+0x8/0x10)
[ 0.000000] [<c02deb28>] (Ldiv0+0x8/0x10) from [<c0477030>] (clk_divider_set_rate+0x10/0x114)
[ 0.000000] [<c0477030>] (clk_divider_set_rate+0x10/0x114) from [<c0476ef4>] (clk_change_rate+0x38/0xb8)
[ 0.000000] [<c0476ef4>] (clk_change_rate+0x38/0xb8) from [<c0476f5c>] (clk_change_rate+0xa0/0xb8)
[ 0.000000] Division by zero in kernel.
[ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.10.0-03445-gfb2af00-dirty #7
[ 0.000000] [<c001bfe8>] (unwind_backtrace+0x0/0xf4) from [<c001868c>] (show_stack+0x10/0x14)
[ 0.000000] [<c001868c>] (show_stack+0x10/0x14) from [<c02deb28>] (Ldiv0+0x8/0x10)
[ 0.000000] [<c02deb28>] (Ldiv0+0x8/0x10) from [<c0477030>] (clk_divider_set_rate+0x10/0x114)
[ 0.000000] [<c0477030>] (clk_divider_set_rate+0x10/0x114) from [<c0476ef4>] (clk_change_rate+0x38/0xb8)
[ 0.000000] [<c0476ef4>] (clk_change_rate+0x38/0xb8) from [<c0476f5c>] (clk_change_rate+0xa0/0xb8)
[ 0.000000] Division by zero in kernel.
[ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.10.0-03445-gfb2af00-dirty #7
[ 0.000000] [<c001bfe8>] (unwind_backtrace+0x0/0xf4) from [<c001868c>] (show_stack+0x10/0x14)
[ 0.000000] [<c001868c>] (show_stack+0x10/0x14) from [<c02deb28>] (Ldiv0+0x8/0x10)
[ 0.000000] [<c02deb28>] (Ldiv0+0x8/0x10) from [<c0477030>] (clk_divider_set_rate+0x10/0x114)
[ 0.000000] [<c0477030>] (clk_divider_set_rate+0x10/0x114) from [<c0476ef4>] (clk_change_rate+0x38/0xb8)
[ 0.000000] [<c0476ef4>] (clk_change_rate+0x38/0xb8) from [<c0476f5c>] (clk_change_rate+0xa0/0xb8)
[ 0.000000] Division by zero in kernel.
[ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.10.0-03445-gfb2af00-dirty #7
[ 0.000000] [<c001bfe8>] (unwind_backtrace+0x0/0xf4) from [<c001868c>] (show_stack+0x10/0x14)
[ 0.000000] [<c001868c>] (show_stack+0x10/0x14) from [<c02deb28>] (Ldiv0+0x8/0x10)
[ 0.000000] [<c02deb28>] (Ldiv0+0x8/0x10) from [<c0477030>] (clk_divider_set_rate+0x10/0x114)
[ 0.000000] [<c0477030>] (clk_divider_set_rate+0x10/0x114) from [<c0476ef4>] (clk_change_rate+0x38/0xb8)
[ 0.000000] [<c0476ef4>] (clk_change_rate+0x38/0xb8) from [<c0476f5c>] (clk_change_rate+0xa0/0xb8)
[ 0.000000] clock: trace_clk_div_ck: could not find divisor for target rate 0 for parent pmd_trace_clk_mux_ck
[ 0.000000] Division by zero in kernel.
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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Currently, whenever we idle a device _idle_sysc() is called and writes to the
devices SYSCONFIG register to set the idle mode. A lot devices are using the
smart-idle mode and so the write to the SYSCONFIG register is programming the
same value that is already stored in the register.
Writes to the devices SYSCONFIG register can be slow, for example, writing to
the DMTIMER SYSCONFIG register takes 3 interface clock cycles and 3 functional
clock cycles. If the DMTIMER is using the slow 32kHz functional clock this can
take ~100us.
Furthermore, during boot on an OMAP4430 panda board, I see that there are 100
calls to _idle_sysc(), however, only 3 out of the 100 calls actually write
the SYSCONFIG register with a new value.
Therefore, to avoid unnecessary writes to device SYSCONFIG registers when
idling the device, only write the value if the value has changed. It should be
safe to do this on idle as the context of the register will never be lost while
the device is active.
Verified that suspend, CORE off and retention states are working with this
change on OMAP3430 Beagle board.
Signed-off-by: Jon Hunter <jon-hunter@ti.com>
[paul@pwsan.com: updated to apply]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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Add the hwmod data for the mailbox IP in OMAP5 SoC.
This is needed to be able to enable the OMAP mailbox
support for OMAP5.
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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late/all
From Rob Herring:
Updates for Highbank for 3.12:
- A couple of fixes to enable LPAE.
- pl08x driver fixes to make it build with ARCH_DMA_ADDR_T_64BIT.
- Avoid L2 related smc calls on Midway.
- Add selecting of necesssary ARM errata.
* tag 'highbank-for-3.12' of git://sources.calxeda.com/kernel/linux:
ARM: highbank: clean-up some unused includes
ARM: highbank: avoid L2 cache smc calls when PL310 is not present
ARM: move outer_cache declaration out of ifdef
ARM: highbank: select ARCH_DMA_ADDR_T_64BIT for LPAE
DMA: fix printk warning in AMBA PL08x DMA driver
DMA: fix AMBA PL08x compilation issue with 64bit DMA address type
ARM: highbank: select required errata work-arounds
ARM: highbank: select ARCH_HAS_HOLES_MEMORYMODEL
ARM: highbank: enable DMA zone for LPAE
ARM: use phys_addr_t for DMA zone sizes
Signed-off-by: Olof Johansson <olof@lixom.net>
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Signed-off-by: Rob Herring <rob.herring@calxeda.com>
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While Midway firmware handles L2 smc calls as nops, the custom smc calls
present a problem when running virtualized Midway guest. They aren't
needed so just avoid calling them.
In the process, cleanup the L2X0 ifdefs and use IS_ENABLED instead.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
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Move the outer_cache declaration of the CONFIG_OUTER_CACHE ifdef so that
outer_cache can be used inside IS_ENABLED condition.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
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ECX-2000 has some 64-bit capable DMA and therefore needs dma_addr_t
to be a 64-bit size.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
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