This is the long awaited simplification of irqdomain. It gets rid of the
different types of irq domains and instead both linear and tree mappings
can be supported in a single domain. Doing this removes a lot of special
case code and makes irq domains simpler to understand overall.
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Merge tag 'irqdomain-for-linus' of git://git.secretlab.ca/git/linux
Pull irqdomain refactoring from Grant Likely:
"This is the long awaited simplification of irqdomain. It gets rid of
the different types of irq domains and instead both linear and tree
mappings can be supported in a single domain. Doing this removes a
lot of special case code and makes irq domains simpler to understand
overall"
* tag 'irqdomain-for-linus' of git://git.secretlab.ca/git/linux:
irq: fix checkpatch error
irqdomain: Include hwirq number in /proc/interrupts
irqdomain: make irq_linear_revmap() a fast path again
irqdomain: remove irq_domain_generate_simple()
irqdomain: Refactor irq_domain_associate_many()
irqdomain: Beef up debugfs output
irqdomain: Clean up aftermath of irq_domain refactoring
irqdomain: Eliminate revmap type
irqdomain: merge linear and tree reverse mappings.
irqdomain: Add a name field
irqdomain: Replace LEGACY mapping with LINEAR
irqdomain: Relax failure path on setting up mappings
UBI device numbers when attaching MTD devices by using the "mtd="
module parameter.
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Merge tag 'upstream-3.11-rc1' of git://git.infradead.org/linux-ubi
Pull ubi fixes from Artem Bityutskiy:
"A couple of fixes and clean-ups, allow for assigning user-defined UBI
device numbers when attaching MTD devices by using the "mtd=" module
parameter"
* tag 'upstream-3.11-rc1' of git://git.infradead.org/linux-ubi:
UBI: support ubi_num on mtd.ubi command line
UBI: fastmap break out of used PEB search
UBI: document UBI_IOCVOLUP better in user header
UBI: do not abort init when ubi.mtd devices cannot be found
UBI: drop redundant "UBI error" string
smp_call_function_* must not be called from softirq context.
But clock_was_set() which calls on_each_cpu() is called from softirq
context to implement a delayed clock_was_set() for the timer interrupt
handler. Though that almost never gets invoked. A recent change in the
resume code uses the softirq based delayed clock_was_set to support
Xens resume mechanism.
linux-next contains a new warning which warns if smp_call_function_*
is called from softirq context which gets triggered by that Xen
change.
Fix this by moving the delayed clock_was_set() call to a work context.
Reported-and-tested-by: Artem Savkov <[email protected]>
Reported-by: Sasha Levin <[email protected]>
Cc: David Vrabel <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: H. Peter Anvin <[email protected]>,
Cc: Konrad Wilk <[email protected]>
Cc: John Stultz <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
Up to commit 5d33b883a (clocksource: Always verify highres capability)
we had no sanity check when selecting a clocksource, which prevented
that a non highres capable clocksource is used when the system already
switched to highres/nohz mode.
The new sanity check works as Alex and Tim found out. It prevents the
TSC from being used. This happens because on x86 the boot process
looks like this:
tsc_start_freqency_validation(TSC);
clocksource_register(HPET);
clocksource_done_booting();
clocksource_select()
Selects HPET which is valid for high-res
switch_to_highres();
clocksource_register(TSC);
TSC is not selected, because it is not yet
flagged as VALID_HIGH_RES
clocksource_watchdog()
Validates TSC for highres, but that does not make TSC
the current clocksource.
Before the sanity check was added, we installed TSC unvalidated which
worked most of the time. If the TSC was really detected as unstable,
then the unstable logic removed it and installed HPET again.
The sanity check is correct and needed. So the watchdog needs to kick
a reselection of the clocksource, when it qualifies TSC as a valid
high res clocksource.
To solve this, we mark the clocksource which got the flag
CLOCK_SOURCE_VALID_FOR_HRES set by the watchdog with an new flag
CLOCK_SOURCE_RESELECT and trigger the watchdog thread. The watchdog
thread evaluates the flag and invokes clocksource_select() when set.
To avoid that the clocksource_done_booting() code, which is about to
install the first real clocksource anyway, needs to go through
clocksource_select and tick_oneshot_notify() pointlessly, split out
the clocksource_watchdog_kthread() list walk code and invoke the
select/notify only when called from clocksource_watchdog_kthread().
So clocksource_done_booting() can utilize the same splitout code
without the select/notify invocation and the clocksource_mutex
unlock/relock dance.
Reported-and-tested-by: Alex Shi <[email protected]>
Cc: Hans Peter Anvin <[email protected]>
Cc: Tim Chen <[email protected]>
Cc: Andi Kleen <[email protected]>
Tested-by: Peter Zijlstra <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Davidlohr Bueso <[email protected]>
Cc: John Stultz <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
This patch adds Device Tree support to the shdma driver. No special DT
properties are used, only standard DMA DT bindings are implemented. Since
shdma controllers reside on SoCs, their configuration is SoC-specific and
shall be passed to the driver from the SoC platform data, using the
auxdata procedure.
Signed-off-by: Guennadi Liakhovetski <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
shdma_chan_filter() is a function, provided by the shdma-base.c module,
move its declaration to the appropriate header.
Signed-off-by: Guennadi Liakhovetski <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Use an existing pointer instead of retrieving it again.
Signed-off-by: Guennadi Liakhovetski <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Replace clk_enable/disable with clk_prepare_enable/disable_unprepare to
avoid common clk framework warnings.
Signed-off-by: Boris BREZILLON <[email protected]>
[[email protected]: remove return code checking in at_dma_resume_noirq()]
Signed-off-by: Nicolas Ferre <[email protected]>
Correct coding style following the patch:
7c407d3e54dcc0c79119553c8d5ef176c1d5bc3a (DMA: AT91:
Get residual bytes in dma buffer).
Signed-off-by: Nicolas Ferre <[email protected]>
Since patch 7c407d3e54dcc0c79119553c8d5ef176c1d5bc3a (DMA: AT91:
Get residual bytes in dma buffer), the function
atc_cleanup_descriptors() is not used anymore. We remove it to prevent
warnings.
Reported-by: Arnd Bergmann <[email protected]>
Signed-off-by: Nicolas Ferre <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
For most devices the FIFO configuration is the same i.e. when half FIFO size is
available/filled, a source/destination request is serviced. But USART devices
have to do it when there is enough space/data available to perform a single
AHB access so the ASAP configuration.
Acked-by: Nicolas Ferre <[email protected]>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
Signed-off-by: Ludovic Desroches <[email protected]>
Signed-off-by: Nicolas Ferre <[email protected]>
DMA-cell content is a concatenation of several values. In order to keep this
stuff human readable, macros are introduced.
The values for the FIFO configuration are not the same as the ones used in the
configuration register in order to keep backward compatibility. Most devices
use the half FIFO configuration but USART ones have to use the ASAP
configuration. This parameter was not initially planed to be into the at91 dma
dt binding. The third cell will be used to store this parameter, it will
become a concatenation of the FIFO configuration and of the peripheral ID. In
order to keep backward compatibility i.e. FIFO configuration is equal to 0, we
have to perform a translation since the value to put in the register to set
half FIFO is 1.
Acked-by: Arnd Bergmann <[email protected]>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
Signed-off-by: Ludovic Desroches <[email protected]>
Signed-off-by: Nicolas Ferre <[email protected]>
Now that all users of the custom jz4740 DMA API have been converted to use
the dmaengine API instead we can remove the custom API and move all the code
talking to the hardware to the dmaengine driver.
Signed-off-by: Lars-Peter Clausen <[email protected]>
Acked-by: Ralf Baechle <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
This patch adds dmaengine support for the JZ4740 DMA controller. For now the
driver will be a wrapper around the custom JZ4740 DMA API. Once all users of the
custom JZ4740 DMA API have been converted to the dmaengine API the custom API
will be removed and direct hardware access will be added to the dmaengine
driver.
Signed-off-by: Lars-Peter Clausen <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Previously, it was assumed that the DMA controller clock is not gated
when the kernel starts running. While that is the power-on state, it is
safer to not rely on that.
Signed-off-by: Maarten ter Huurne <[email protected]>
Signed-off-by: Lars-Peter Clausen <[email protected]>
Acked-by: Ralf Baechle <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
mask dma irq when disabling dma channel, so that interrupt status
will not be set and interrupt won't come again.
Signed-off-by: Qiao Zhou <[email protected]>
Acked-by: Zhangfei Gao <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
As pointed out by Arnd Bergmann there is a get_signal macro definied in
linux/signal.h which can conflict with the platform data callback
function of the same name leading to confusing errors from the compiler
(especially if signal.h manages to get pulled into the driver itself due
to header dependencies). Avoid such errors by renaming get_signal and
put_signal in the platform data to get_xfer_signal and put_xfer_signal.
Signed-off-by: Mark Brown <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
This is the PCI part of the DesignWare DMAC driver. The controller is usually
used in the Intel hardware such as Intel Medfield.
Signed-off-by: Andy Shevchenko <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Acked-by: Viresh Kumar <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
To simplify the driver development let's split driver to library and platform
code parts. It helps us to add PCI driver in future.
Signed-off-by: Andy Shevchenko <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Acked-by: Viresh Kumar <[email protected]>
[Fixed compile error and few checkpatch issues]
Signed-off-by: Vinod Koul <[email protected]>
The dw_dmac driver is going to be split into multiple files. To make this more
convenient move it to an own directory.
Signed-off-by: Andy Shevchenko <[email protected]>
Acked-by: Viresh Kumar <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
devm_ioremap_resource does sanity checks on the given resource. No need to
duplicate this in the driver.
Signed-off-by: Andy Shevchenko <[email protected]>
Acked-by: Viresh Kumar <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
The microcode bus address (pl330_dmac.mcode_bus) is currently a u32,
which fails to compile when building on a system with 64-bit bus
addresses.
This patch uses dma_addr_t to represent the address instead.
Cc: Jassi Brar <[email protected]>
Cc: Vinod Koul <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
Acked-by: Jassi Brar <[email protected]>
Acked-by: Grant Likely <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
The PL330 driver probes the peripheral and primecell IDs of the device to
make sure that it is indeed an AMBA PL330. However, it does this by
making byte accesses to a device mapping of the word-aligned ID
registers, which is either UNPREDICTABLE or generates an alignment fault
(depending on the presence of the virtualisation extensions).
Rather than fix this code, we can actually rip most of it out and let
the AMBA bus driver correctly do the probing for us.
Cc: Jassi Brar <[email protected]>
Cc: Vinod Koul <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
Acked-by: Jassi Brar <[email protected]>
Acked-by: Grant Likely <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Update imx-sdma driver to adopt generic DMA device tree bindings. It
calls of_dma_controller_register() with imx-sdma specific of_dma_xlate
to get the generic DMA device tree helper support. The #dma-cells for
imx-sdma must be 3, which includes request ID, peripheral type and
priority.
The existing way of requesting channel, clients directly call
dma_request_channel(), still work there, and will be removed after
all imx-sdma clients get converted to generic DMA device tree helper.
Signed-off-by: Shawn Guo <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
read SIRFSOC_DMA_CH_ADDR register to get current dma transfer position, then
update dma residue so that things like ALSA drivers work as ALSA drivers need
the right residue value.
Signed-off-by: Rongjun Ying <[email protected]>
Signed-off-by: Barry Song <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Lock scenario: Channel 1 was allocated and prepared as slave_sg, used and freed.
Now preparation of cyclic dma on channel 1 will fail with err "DMA configuration
conflict" because tdc->isr_handler still setted to handle_once_dma_done.
This happens because tegra_dma_abort_all() won't be called on channel freeing
if pending list is empty and channel not busy. We need to clear isr_handler
on channel freeing to avoid locking.
Signed-off-by: Dmitry Osipenko <[email protected]>
Acked-by: Stephen Warren <[email protected]>
Acked-by: Laxman Dewangan <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
EXPORT_SYMBOL and inline directives are contradictory to each other.
The patch fixes this inconsistency.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Denis Efremov <[email protected]>
Acked-by: Viresh Kumar <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
The driver core clears the driver data to NULL after device_release
or on probe failure, since commit 0998d06310
(device-core: Ensure drvdata = NULL when no driver is bound).
Thus, it is not needed to manually clear the device driver data to NULL.
Signed-off-by: Jingoo Han <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
The driver core clears the driver data to NULL after device_release
or on probe failure, since commit 0998d06310
(device-core: Ensure drvdata = NULL when no driver is bound).
Thus, it is not needed to manually clear the device driver data to NULL.
Signed-off-by: Jingoo Han <[email protected]>
Acked-by: Nicolas Ferre <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Fix the following sparse warning:
drivers/dma/mxs-dma.c:696:17: warning: symbol 'mxs_dma_xlate' was not declared. Should it be static?
Signed-off-by: Fabio Estevam <[email protected]>
Acked-by: Shawn Guo <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Use the wrapper functions for getting and setting the driver data using
platform_device instead of using dev_{get,set}_drvdata() with &pdev->dev,
so we can directly pass a struct platform_device.
Also, unnecessary dev_set_drvdata() is removed, because the driver core
clears the driver data to NULL after device_release or on probe failure.
Signed-off-by: Jingoo Han <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Add support for returning the residue for current transfer cookie by
reading the transfered buffer size(BTSIZE) in CTRLA register.
For a single buffer cookie, the descriptor length minus BTSIZE
can get the residue.
For a lli cookie, remain_desc will record remain descriptor length
when last descriptor finish, the remain_desc minus BTSIZE can get the
current residue.
If the cookie has completed successfully, the residue will be zero.
If the cookie is in progress, it will be the number of bytes yet to be transferred.
If get residue error, the cookie will be turn into error status.
Check dma fifo to see if data remain, let issue pending finish remain work if there is.
Signed-off-by: Elen Song <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
In one dma transfer, the data transfer width can be configured and it is limited by source or destination peripheral width,
tx_width will save the transfer width, but for memcpy, either source or destination transfer width is taken as tx_width.
Signed-off-by: Elen Song <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
No modification in CFG register configuration, just rearrange
bits directives to group logically and make it more readable.
Signed-off-by: Nicolas Ferre <[email protected]>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Peripheral handshaking identification numbers can be bigger than 15, so new
fields have been created in the CFG register.
Add macros to take this modification into account and use them in
at_dma_xlate() function.
Signed-off-by: Nicolas Ferre <[email protected]>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Adding devicetree support for imx-dma driver. Use driver name for
function 'imx_dma_is_general_purpose' because the devicename for
devicetree initialized devices is different.
Signed-off-by: Markus Pargmann <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>
Reviewed-by: Shawn Guo <[email protected]>
Acked-by: Sascha Hauer <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
This branch contains the following changes:
- Removal of CONFIG_OF_DEVICE, it is always enabled by CONFIG_OF
- Remove #ifdef from linux/of_platform.h to increase compiler syntax
coverage
- Bug fix for address decoding on Bimini and js2x powerpc platforms.
- miscellaneous binding changes
One note on the above. The binding changes going in from all kinds of
different trees has gotten rather out of hand. I picked up some during
this cycle, but even going though my tree isn't a great fit. Ian
Campbell has prototyped splitting the bindings and .dtb files into a
separate repository. The plan is to migrate to using that sometime in
the next few kernel releases which should get rid of a lot of the churn
on binding docs and .dts files.
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Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux
Pull device tree updates from Grant Likely:
"This branch contains the following changes:
- Removal of CONFIG_OF_DEVICE, it is always enabled by CONFIG_OF
- Remove #ifdef from linux/of_platform.h to increase compiler syntax
coverage
- Bug fix for address decoding on Bimini and js2x powerpc platforms.
- miscellaneous binding changes
One note on the above. The binding changes going in from all kinds of
different trees has gotten rather out of hand. I picked up some
during this cycle, but even going though my tree isn't a great fit.
Ian Campbell has prototyped splitting the bindings and .dtb files into
a separate repository. The plan is to migrate to using that sometime
in the next few kernel releases which should get rid of a lot of the
churn on binding docs and .dts files"
* tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux:
of: Fix address decoding on Bimini and js2x machines
of: remove CONFIG_OF_DEVICE
usb: chipidea: depend on CONFIG_OF instead of CONFIG_OF_DEVICE
of: remove of_platform_driver
ibmebus: convert of_platform_driver to platform_driver
driver core: move to_platform_driver to platform_device.h
mfd: DT bindings for the palmas family MFD
ARM: dts: omap3-devkit8000: fix NAND memory binding
of/base: fix typos
of: remove #ifdef from linux/of_platform.h
Pull input updates from Dmitry Torokhov:
"First round of updates for the input subsystem.
You will get a new touchsreen driver for Cypress 4th generation
devices, a driver for a special controller implementing PS/2 protocol
in OLPC devices, and a driver for power key for SiRFprimaII PWRC.
HID and bcm5497 now support for the 2013 MacBook Air.
EVIOCGKEY and the rest of evdev ioctls now flush events of matching
type from the client's event queue so that clients can be sure any
events received after issuing EVIOCG* ioctl are new events.
And a host of cleanups and improvements in other drivers"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (87 commits)
Input: cyttsp4 - kfree xfer_buf on error path in probe()
Input: tps6507x-ts - select INPUT_POLLDEV
Input: bcm5974 - add support for the 2013 MacBook Air
HID: apple: Add support for the 2013 Macbook Air
Input: cyttsp4 - leak on error path in probe()
Input: cyttsp4 - silence NULL dereference warning
Input: cyttsp4 - silence shift wrap warning
Input: tps6507x-ts - convert to polled input device infrastructure
ARM: davinci: da850-evm: remove vref from touchscreen platform data
Input: cyttsp4 - SPI driver for Cypress TMA4XX touchscreen devices
Input: cyttsp4 - I2C driver for Cypress TMA4XX touchscreen devices
Input: cyttsp4 - add core driver for Cypress TMA4XX touchscreen devices
Input: cyttsp - I2C driver split into two modules
Input: add OLPC AP-SP driver
Input: nspire-keypad - remove redundant dev_err call in nspire_keypad_probe()
Input: tps6507x-ts - remove vref from platform data
Input: tps6507x-ts - use bool for booleans
Input: tps6507x-ts - remove bogus unreachable code
Input: samsung-keypad - let device core setup the default pin configuration
Input: wacom_i2c - implement hovering capability
...
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into timers/core
Frederic sayed: "Most of these patches have been hanging around for
several month now, in -mmotm for a significant chunk. They already
missed a few releases."
Signed-off-by: Thomas Gleixner <[email protected]>
If probe() fails after cd->xfer_buf allocated, it will not freed.
Added kfree(cd->xfer_buf) with and error label.
Signed-off-by: Ferruh Yigit <[email protected]>
Signed-off-by: Dmitry Torokhov <[email protected]>
Pull i2c updates from Wolfram Sang:
- new drivers: Kontron PLD, Wondermedia VT
- mv64xxx driver gained sun4i support and a bigger cleanup
- duplicate driver 'intel-mid' removed
- added generic device tree binding for sda holding time (and
designware driver already uses it)
- we tried to allow driver probing with only device tree and no i2c
ids, but I had to revert it because of side effects. Needs some
rethinking.
- driver bugfixes, cleanups...
* 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (34 commits)
i2c-designware: use div_u64 to fix link
i2c: Kontron PLD i2c bus driver
i2c: iop3xxx: fix build failure after waitqueue changes
i2c-designware: make SDA hold time configurable
i2c: mv64xxx: Set bus frequency to 100kHz if clock-frequency is not provided
i2c: imx: allow autoloading on dt ids
i2c: mv64xxx: Fix transfer error code
i2c: i801: SMBus patch for Intel Coleto Creek DeviceIDs
i2c: omap: correct usage of the interrupt enable register
i2c-pxa: prepare clock before use
Revert "i2c: core: make it possible to match a pure device tree driver"
i2c: nomadik: allocate adapter number dynamically
i2c: nomadik: support elder Nomadiks
i2c: mv64xxx: Add Allwinner sun4i compatible
i2c: mv64xxx: make the registers offset configurable
i2c: mv64xxx: Add macros to access parts of registers
i2c: vt8500: Add support for I2C bus on Wondermedia SoCs
i2c: designware: fix race between subsequent xfers
i2c: bfin-twi: Read and write the FIFO in loop
i2c: core: make it possible to match a pure device tree driver
...
