Manuel Lauss [Sat, 22 Aug 2009 16:09:27 +0000 (18:09 +0200)]
MIPS: Alchemy: get rid of allow_au1k_wait
Eliminate the 'allow_au1k_wait' variable. MIPS kernel installs the
Alchemy-specific wait code before timer initialization; if the C0
timer must be used for timekeeping the wait function is set to NULL
which means no wait implementation is available.
As a sideeffect, the 'wait instruction available' output in
/proc/cpuinfo now correctly indicates whether 'wait' is usable.
Run-tested on DB1200.
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
David Daney [Mon, 13 Jul 2009 18:15:19 +0000 (11:15 -0700)]
MIPS: Allow kernel use of LL/SC to be separate from the presence of LL/SC.
On some CPUs, it is more efficient to disable and enable interrupts in the
kernel rather than use ll/sc for atomic operations. But if we were to set
cpu_has_llsc to false, we would break the userspace futex interface (in
asm/futex.h).
We separate the two concepts, with a new predicate kernel_uses_llsc, that
lets us disable the kernel's use of ll/sc while still allowing the futex
code to use it.
Also there were a couple of cases in bitops.h where we were using ll/sc
unconditionally even if cpu_has_llsc were false.
Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
CONFIG_CPU_HAS_LLSC duplicated the function of cpu_has_llsc for no good
reason and and the results if the one was enabled and the other disabled
was very unobvious. Remove it now that there are no more remaining users.
MIPS: AR7: Make board code register ar7_wdt as a platform device
This patch makes the board code register the ar7_wdt driver as a platform
device. We move the dynamic resource calculation here since the driver
should not be aware of the AR7 SoC version it is running on.
MIPS: Loongson: Add GCC 4.4 support for Loongson2E
Because only gcc >=4.4 have loongson-specific support, we need to choose
the suitable -march argument for gcc <= 4.3 and gcc >= 4.4, and here, we
use -march=loongson2e for loongson2e.
Thanks goes to Arnaud Patard <apatard@mandriva.com> for suggestion of
using cc-options(Documentation/kbuild/makefiles.txt). and thanks Zhang
Le for introducing the new CPU_LOONGSON2E kernel option.
NOTE: -mtune option is not need if -march and -mtune use the same value.
MIPS: Loongson: Add a machtype kernel command line argument
The difference between some loongson-based machines is very small, so, if
there is no necessary to add new kernel config options to cope with this
difference, it will be better to share the same kernel image file between
them, benefit from this, the linux distribution developers only have a need
to compile the kernel one time.
This machtype kernel command line argument will be used later to share the
same kernel image file between two different machines(menglong & yeeloong)
made by lemote.
Thanks very much to Zhang Le for cleaning up the machtype implementation.
MIPS: Loongson: Split common loongson source code out
To share common loongson source code between all of the loongson-based
machines. there is a need to split it out of the fuloong-2e/ directory.
at the same time, other according tuning is needed. the machine-specific
parts are defined as macros in relative header file, pci.h, mem.h,
machine.h.
To make source code of loongson sharable to the machines(such as gdium)
made by the other companies, we rename arch/mips/lemote to
arch/mips/loongson, asm/mach-lemote to asm/mach-loongson, and rename lm2e
to the name of the machine: fuloong-2e. accordingly, FULONG are renamed to
FULOONG2E to make it distinguishable to the future FULOONG2F. and also,
some other relative tuning is needed.
This kernel support is needed by the user-space tool:oprofile to profile
linux kernel or applications via loongson2 performance counters. you can
enable this driver via CONFIG_OPROFILE = y or m.
On Loongson2 there are two performance counters, each one can count 16
events respectively. when anyone of the performance counter overflows, an
interrupt will be generated and is routed to the IRQ MIPS_CPU_IRQ_BASE + 6.
MIPS: Loongson: RTC: Enable legacy RTC driver on fulong
RTC_LIB is selected by MIPS by default, and therefore, the legacy RTC
driver is disabled. but fortunately, RTC_LIB not works on fulong, so,
enabling the legcy RTC driver is needed, otherwise, the tools like
hwclock will not work.
MIPS: Loongson: Add new early_printk implmentation
This patch is based on the implementation in the lm2e-fixes branch of
Philippe's git://git.linux-cisco.org/linux-mips.git and the
malta-specific early_printk implementation.
Removes the existing implementation of early_printk for fulong. The old
implementation was based on the outdated board-specific dbg_io.c.
Since commit 8d60a903d986ffa26c41f0092320a3b9da20bfaf dbg_io.c is not longer
needed; it will be removed by the next patch, and a new implementation of
early_printk will be added later.
MIPS: TXx9: Disable PM capability of TX493[89] internal ether
Some TC35815 variants (i.e. TX493[89] internal ether) report existance of
PM registers though they are not supported. Disable PM features by
clearing pdev->pm_cap.
Nelson Elhage [Fri, 31 Jul 2009 20:58:17 +0000 (16:58 -0400)]
MIPS: make page.h constants available to assembly.
page.h includes ifndef __ASSEMBLY__ guards, but PAGE_SIZE and some other
constants are defined using "1UL", which the assembler does not support.
Use the _AC macro from const.h to make them available to assembly (and
linker scripts).
Signed-off-by: Nelson Elhage <nelhage@ksplice.com> Signed-off-by: Tim Abbott <tabbott@ksplice.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Alexey Dobriyan [Wed, 12 Aug 2009 19:59:27 +0000 (23:59 +0400)]
MIPS: Lasat: Fix compilation
Header needed for current_cpu_data which expands to smp_processor_id().
However, linux/smp.h can't be included into asm/cpu-info.h due to horrible
circular dependencies, so plug it here.
David Daney [Thu, 20 Aug 2009 19:35:53 +0000 (12:35 -0700)]
MIPS: Octeon: Check all CCAs in cvmx_write_csr.
The current code only checks CCA of 0 when deciding if a dummy read is
needed. Since the kernel can (and does) use other CCAs we need to
mask out the CCA bits from the address. Since the address constant
now fits in 16 bits, there is an added benefit that smaller code is
generated.
Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Roel Kluin [Wed, 26 Aug 2009 12:48:35 +0000 (14:48 +0200)]
MIPS: Octeon: False positive timeout
If we reach the test just below the loop with a `timeout' value of 0,
this does not mean that the timeout caused the loop to end, but rather
the `smi_rd.s.pending', in the last iteration. If timeout caused the
loop to end, then `timeout' is -1, not 0.
Since this can occur only in the last iteration, it is not very likely
to be a problem. By changing the post- to prefix decrement we ensure
that a timeout of 0 does mean it timed out.
use the wrong API when free dma. So when map dma use a flag to
demostrate whether it is 'pci_map_single' or 'pci_map_page'. When free
the dma, check the flags to select the right APIs('pci_unmap_single'
or 'pci_unmap_page').
set the flags type to u16 instead of unsigned long on David's comments.
Signed-off-by: Jie Yang <jie.yang@atheros.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
amd64_edac: check NB MCE bank enable on the current node properly
amd64_edac: Rewrite unganged mode code of f10_early_channel_count
amd64_edac: cleanup amd64_check_ecc_enabled
x86, EDAC: Provide function to return NodeId of a CPU
amd64_edac: build driver only on AMD hardware
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: (53 commits)
m68knommu: Make PAGE_SIZE available to assembly files.
m68knommu: fix ColdFire definition of CLOCK_TICK_RATE
m68knommu: set multi-function pins for ethernet when enabled
m68knommu: remove special interrupt handling code for ne2k support
m68knommu: relax IO_SPACE_LIMIT setting
m68knommu: remove ColdFire direct interrupt register access
m68knommu: create a speciailized ColdFire 5272 interrupt controller
m68knommu: add support for second interrupt controller of ColdFire 5249
m68knommu: clean up old ColdFire timer irq setup
m68knommu: map ColdFire interrupts to correct masking bits
m68knommu: clean up ColdFire 532x CPU timer setup
m68knommu: simplify ColdFire "timers" clock initialization
m68knommu: support code to mask external interrupts on old ColdFire CPU's
m68knommu: merge old ColdFire interrupt controller masking macros
m68knommu: remove duplicate ColdFire mcf_autovector() code
m68knommu: move ColdFire INTC definitions to new include file
m68knommu: mask off all interrupts in ColdFire intc-simr controller
m68knommu: remove timer device interrupt setup for ColdFire 532x
m68knommu: remove interrupt masking from ColdFire pit timer
m68knommu: remove unecessary interrupt level setting in ColdFire 520x setup
...
Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
hwmon: (lm85) Don't bind to Winbond/Nuvoton WPCD377I
hwmon: (pcf8591) Documentation clean-ups
hwmon: Clearly mark ACPI drivers as such
hwmon: Use resource_size
hwmon: Include <linux/io.h> instead of <asm/io.h>
hwmon: (tmp421) Add documentation
hwmon: Add driver for Texas Instruments TMP421/422/423 sensor chips
hwmon-vid: Ignore 6th VID pin of AMD family 0Fh processors
hwmon: (asus_atk0110) Add maintainer information
hwmon: (abituguru3) Support multiple DMI strings per chip ID
The headphone and speaker mixer elements aren't properly set for
MSI GX620 with targa-8ch-dig quirk.
Also fixed the speaker volume control for other ALC883-targa quirks,
too.
This sets the number of voltages for the AB3100 regulators so that
they play well with the voltage listing functions and can be used
properly with the MMC regulator integration glue for example.
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
ext4: Fix the alloc on close after a truncate hueristic
In an attempt to avoid doing an unneeded flush after opening a
(previously non-existent) file with O_CREAT|O_TRUNC, the code only
triggered the hueristic if ei->disksize was non-zero. Turns out that
the VFS doesn't call ->truncate() if the file doesn't exist, and
ei->disksize is always zero even if the file previously existed. So
remove the test, since it isn't necessary and in fact disabled the
hueristic.
Thanks to Clemens Eisserer that he was seeing problems with files
written using kwrite and eclipse after sudden crashes caused by a
buggy Intel video driver.
Peter Zijlstra [Thu, 17 Sep 2009 07:01:20 +0000 (09:01 +0200)]
sched: Stop buddies from hogging the system
Clear buddies more agressively.
The (theoretical, haven't actually observed any of this) problem is
that when we do not select either buddy in pick_next_entity()
because they are too far ahead of the left-most task, we do not
clear the buddies.
This means that as soon as we service the left-most task, these
same buddies will be tried again on the next schedule. Now if the
left-most task was a pure hog, it wouldn't have done any wakeups
and it wouldn't have set buddies of its own. That leads to the old
buddies dominating, which would lead to bad latencies.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Peter Zijlstra [Wed, 16 Sep 2009 10:31:31 +0000 (12:31 +0200)]
sched: Add new wakeup preemption mode: WAKEUP_RUNNING
Create a new wakeup preemption mode, preempt towards tasks that run
shorter on avg. It sets next buddy to be sure we actually run the task
we preempted for.
Test results:
root@twins:~# while :; do :; done &
[1] 6537
root@twins:~# while :; do :; done &
[2] 6538
root@twins:~# while :; do :; done &
[3] 6539
root@twins:~# while :; do :; done &
[4] 6540
This adds support for the regulators found in the AB3100
Mixed-Signal IC.
It further also defines platform data for the ST-Ericsson
U300 platform and extends the AB3100 MFD driver so that
platform/board data with regulation constraints and an init
function can be passed down all the way from the board to
the regulators.
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Linus Walleij [Sun, 30 Aug 2009 21:49:04 +0000 (23:49 +0200)]
rtc: AB3100 RTC support
This adds support for the RTC found inside the AB3100 Mixed Signal chip.
The symbols used for communicating with the chip is found in the
mfd/ab3100-core.c driver that also provides the platform device.
Amit Kucheria [Thu, 27 Aug 2009 18:27:57 +0000 (20:27 +0200)]
mfd: OMAP: Board-specifc twl4030 DPS scripts for RX51 board
Add support for Dynamic Power Switching (DPS) for the RX51 board.
These scripts are still a work-in-progress. I'll keep sending patches to
update the scripts as they are optimised.
Signed-off-by: Amit Kucheria <amit.kucheria@verdurent.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Amit Kucheria [Mon, 17 Aug 2009 14:01:56 +0000 (17:01 +0300)]
mfd: Print warning for twl4030 out-of-order script loading
When the sleep script is loaded before the wakeup script, there is a
chance that the system might go to sleep before the wakeup script
loading is completed. This will lead to a system that does not wakeup
and has been observed to cause non-booting boards.
Various options were considered to solve this problem, including
modification of the core twl4030 power code to be smart enough to
reorder the loading of the scripts. But it felt too over-engineered.
Hence this patch just warns the DPS script developer so that they may be
reordered in the board-code itself.
Signed-off-by: Amit Kucheria <amit.kucheria@verdurent.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Amit Kucheria [Mon, 31 Aug 2009 16:32:18 +0000 (18:32 +0200)]
mfd: Add support for TWL4030/5030 dynamic power switching
The TWL4030/5030 family of multifunction devices allows board-specific
control of the the various regulators, clock and reset lines through
'scripts' that are loaded into its memory. This allows for Dynamic Power
Switching (DPS).
Implement board-independent core support for DPS that is then used by
board-specific code to load custom DPS scripts.
Signed-off-by: Amit Kucheria <amit.kucheria@verdurent.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Linus Walleij [Tue, 18 Aug 2009 20:52:26 +0000 (22:52 +0200)]
mfd: AB3100 OTP readout
This adds the ability to read out OTP (One-Time Programmable)
registers in the AB3100 MFD ASIC. It's a simple sysfs file you
can cat to prompt. The OTP registers of the AB3100 are used to
store various device-unique information such as customer ID,
product flags and the 3GPP standard IMEI (International Mobile
Equipment Indentity) number.
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Sascha Hauer [Tue, 18 Aug 2009 23:43:50 +0000 (01:43 +0200)]
regulator: Add Freescale MC13783 driver
This driver provides basic support for the voltage regulators
integrated into the Freescale MC13783 PMIC. It is currently
only possible to enable/disable outputs, not to actually
set the voltage.
Linus Walleij [Thu, 13 Aug 2009 09:50:01 +0000 (11:50 +0200)]
mfd: AB3100 disable irq nosync
This will make the worker fire interrupt disable the AB3100 IRQ
without sync which resolves a race since the interrupt obviously
cannot wait for itself to complete while being handled.
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Linus Walleij [Thu, 13 Aug 2009 09:49:49 +0000 (11:49 +0200)]
mfd: AB3100 alter default setting
This alters the default setting for AB3100_IMRB1 from 0xff to
0xbf. These registers are used for the yet unimplemented ADC
and this new setting will deactivate ADC Trigger 1.
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Linus Walleij [Thu, 13 Aug 2009 09:49:38 +0000 (11:49 +0200)]
mfd: AB3100 propagate error
This makes ab3100_set_register_interruptible() propagate the error
code from suboperations properly so it can be handles properly.
(A special case comes from signal interruption.)
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Linus Walleij [Thu, 13 Aug 2009 09:49:23 +0000 (11:49 +0200)]
mfd: AB3100 accessor function cleanups
This adds the _interruptible suffix to the AB3100 accessor
functions on par with mutex_lock_interruptible() that's used
for blocking simultaneous calls to the AB3100 acessor functions.
Since these accesses are slow on a 100kHz I2C bus and may line
up waiting for the mutex, we need to handle interruption by
system shutdown or kill signals and may just as well denote that
in the function names.
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Mark Brown [Thu, 27 Aug 2009 17:59:05 +0000 (19:59 +0200)]
rtc: Add support for RTCs on Wolfson WM831x devices
The WM831x series of PMICs contain RTC functionality. The hardware
provides a 32 bit counter incrementing at 1Hz together with a per
tick interrupt and an alarm value. For simplicity the driver chooses
to define the epoch for the counter as the Unix epoch - if required
platform data can be used in future to customise this.
When powered on from a completely cold state the RTC reports that it
has not been configured - when this happens an error is returned
when attempting to read the RTC in order to avoid use of values we
know to be invalid.
The hardware also provides security features which mean that it can
ignore attempts to set the RTC time in certain circumstances, most
notably if the RTC is written to too often. These errors are detected
by verifying the written RTC value.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Antonio Ospite [Fri, 7 Aug 2009 21:18:41 +0000 (23:18 +0200)]
regulator: get pcap data from the parent device
Right now the pcap core driver passes a reference to its pcap data abusing the
subdrivers platform drvdata, this is not good.
Get the reference directly from the parent device.
Signed-off-by: Antonio Ospite <ospite@studenti.unina.it> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Daniel Ribeiro [Fri, 7 Aug 2009 20:54:56 +0000 (22:54 +0200)]
input: PCAP2 based touchscreen driver
Touchscreen driver for the PCAP2 multi function device used in
Motorola EZX smartphones.
Signed-off-by: Daniel Ribeiro <drwyrm@gmail.com> Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org> Signed-off-by: Antonio Ospite <ospite@studenti.unina.it> Acked-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Antonio Ospite [Thu, 6 Aug 2009 23:08:52 +0000 (16:08 -0700)]
regulator: register pcap earlier
Register pcap-regulator earlier so it can be used with cpufreq
Signed-off-by: Daniel Ribeiro <drwyrm@gmail.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Mark Brown [Tue, 28 Jul 2009 14:23:46 +0000 (15:23 +0100)]
regulator: Add WM831x ISINK support
The WM831x series of PMICs provide two constant current sinks
designed to drive strings of serially connected LEDs for applications
such as backlights. This driver adds support for those regulators.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Mark Brown [Tue, 28 Jul 2009 14:23:16 +0000 (15:23 +0100)]
regulator: Add WM831x DC-DC boost convertor support
The WM831x series of PMICs include a single DC-DC boost convertor.
This adds basic support for this convertor.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Mark Brown [Tue, 28 Jul 2009 14:22:23 +0000 (15:22 +0100)]
regulator: Add WM831x EPE support
The WM831x series of PMICs provide two optional outputs for
controlling external devices during power sequencing, for example
an external regulator. While in essence these are GPIOs the
hardware presents them as DCDCs with very little control so
provide support via the regulator API in that fashion.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Mark Brown [Tue, 28 Jul 2009 14:22:02 +0000 (15:22 +0100)]
regulator: Add WM831x LDO support
The WM831x series of devices provide three types of LDO:
- General purpose LDOs supporting voltages from 0.9-3.3V
- High performance analogue LDOs supporting voltages from 1-3.5V
- Very low power consumption LDOs intended to support always on
functionality.
This patch adds support for all three kinds of LDO. Each regulator
is probed as an individual platform device with resources used to
provide the register map location of the regulator. Mixed hardware
and software control of regulators is not current supported.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Mark Brown [Tue, 28 Jul 2009 14:21:49 +0000 (15:21 +0100)]
regulator: Add WM831x DC-DC buck convertor support
The WM831x series of devices all have 3 DC-DC buck convertors. This
driver implements software control for these regulators via the
regulator API. Use with split hardware/software control of individual
regulators is not supported, though regulators not controlled by
software may be controlled via the hardware control interfaces.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Mark Brown [Tue, 15 Sep 2009 10:07:12 +0000 (12:07 +0200)]
input: Add support for the WM831x ON pin
The WM831x series of PMICs support control of initial power on
through the ON pin on the device with soft control of the pin
at other times. Represent this to userspace as KEY_POWER.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Mark Brown [Tue, 28 Jul 2009 14:52:22 +0000 (15:52 +0100)]
hwmon: WM831x PMIC hardware monitoring driver
This driver adds support for the hardware monitoring features of
the WM831x PMICs to the hwmon API. Monitoring is provided for
the system voltages supported natively by the WM831x, the chip
temperature, the battery temperature and the auxiliary inputs
of the WM831x.
Currently no alarms are supported, though digital comparators on
the WM831x devices would allow these to be provided.
Since the auxiliary and battery temperature input scaling depends
on the system configuration the value is reported as a voltage to
userspace.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Mark Brown [Mon, 27 Jul 2009 13:46:00 +0000 (14:46 +0100)]
gpio: Add WM831X GPIO driver
Add support for the GPIO pins on the WM831x. No direct support is
currently supplied for configuring non-gpiolib functionality such
as pull configuration and alternate functions, soft configuration
of these will be provided in a future patch.
Currently use of these pins as interrupts is not supported due to
the ongoing issues with generic irq not support interrupt controllers
on interrupt driven buses. Users can directly request the interrupts
with the wm831x-specific APIs currently provided if required.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Mark Brown [Mon, 27 Jul 2009 13:45:57 +0000 (14:45 +0100)]
mfd: Export ISEL values from WM831x core
The current settings which can be used with the WM831x current sinks
can't easily be mapped between register values and currents at run
time without a lookup table since the values scale logarithmically
to match the way the human eye interprets brightness. This lookup
table is inclided in the core since several drivers need to use it.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Mark Brown [Mon, 27 Jul 2009 13:45:56 +0000 (14:45 +0100)]
mfd: Add basic WM831x OTP support
The WM831x series of devices use OTP (One Time Programmable, a type
of PROM) to store system configuration. At run time this data is
visible via registers.
Currently the only explicitly supported feature is that the unique
ID provided by every WM831x device is exported to user space via
sysfs. Other configuration data may be read by system-specific
code in the pre_init() and post_init() platform data operations.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Mark Brown [Mon, 27 Jul 2009 13:45:55 +0000 (14:45 +0100)]
mfd: Conditionally add WM831x backlight subdevice
The WM831x backlight driver requires at least the specification of the
current sink to use and a maximum current to allow them to function and
will actively interfere with other users of the regulators it uses if
misconfigured so only register the subdevice for it if this platform
data has been supplied.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Mark Brown [Mon, 27 Jul 2009 13:45:54 +0000 (14:45 +0100)]
mfd: Add WM831x AUXADC support
The WM831x contains an auxiliary ADC with a number of switchable
inputs which is used to monitor some of the voltages and
temperatures in the system and has some external inputs which can be
used for machine specific purposes. Provide an API allowing drivers
to read values from the ADC.
An internal reference voltage is provided to allow callibration of
the ADC. This is used to calibrate the device at startup.
The hardware also supports continuous readings and digital comparators.
These are not yet supported by the driver.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Mark Brown [Mon, 27 Jul 2009 13:45:53 +0000 (14:45 +0100)]
mfd: Add WM831x interrupt support
The WM831x includes an interrupt controller managing interrupts for
the various functions on the chip. This patch adds support for the
core interrupt block on the device.
Ideally this would be supported by genirq, particularly for the
GPIOs, but currently genirq is unable to cope with controllers on
interrupt driven buses so we cut'n'paste the generic interface.
Once genirq is able to cope chips like this it should be a case
of filing the prefixes off the code and redoing wm831x-irq.c to
move over.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Mark Brown [Mon, 27 Jul 2009 13:45:52 +0000 (14:45 +0100)]
mfd: Initial core support for WM831x series devices
The WM831x series of devices are register compatible processor power
management subsystems, providing regulator and power path management
facilities along with other services like watchdog, RTC and touch
panel controllers.
This patch adds very basic support, providing basic single register
I2C access, handling of the security key and registration of the
devices.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Mark Brown [Mon, 27 Jul 2009 13:45:51 +0000 (14:45 +0100)]
mfd: Allow multiple MFD cells with the same name
Provide basic support for MFDs having multiple cells of a given
type with different IDs by adding an id to the mfd_cell structure
and then adding that to the id passed in to mfd_add_devices().
As it stands this approach requires that MFDs using this feature
deal with ensuring that there aren't any ID collisions resulting
from multiple MFDs of the same type being instantiated. This needs
to happen with the existing code too, but with this approach there
is a knock on effect on the IDs for non-duplicated devices.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Antonio Ospite [Fri, 31 Jul 2009 22:55:45 +0000 (15:55 -0700)]
mfd: register ezx-pcap earlier
Register ezx-pcap earlier so it can be used with cpufreq
Signed-off-by: Daniel Ribeiro <drwyrm@gmail.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>