17 Oct, 2007
2 commits
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* 'linus' of master.kernel.org:/pub/scm/linux/kernel/git/perex/alsa: (264 commits)
[ALSA] version 1.0.15
[ALSA] Fix thinko in cs4231 mce down check
[ALSA] sun-cs4231: improved waiting after MCE down
[ALSA] sun-cs4231: use cs4231-regs.h
[ALSA] This simplifies and fixes waiting loops of the mce_down()
[ALSA] This patch adds support for a wavetable chip on
[ALSA] This patch removes open_mutex from the ad1848-lib as
[ALSA] fix bootup crash in snd_gus_interrupt()
[ALSA] hda-codec - Fix SKU ID function for realtek codecs
[ALSA] Support ASUS P701 eeepc [0x1043 0x82a1] support
[ALSA] hda-codec - Add array terminator for dmic in STAC codec
[ALSA] hdsp - Fix zero division
[ALSA] usb-audio - Fix double comment
[ALSA] hda-codec - Fix STAC922x volume knob control
[ALSA] Changed Jaroslav Kysela's e-mail from perex@suse.cz to perex@perex.cz
[ALSA] hda-codec - Fix for Fujitsu Lifebook C1410
[ALSA] mpu-401: remove MPU401_INFO_UART_ONLY flag
[ALSA] mpu-401: do not require an ACK byte for the ENTER_UART command
[ALSA] via82xx - Add DXS quirk for Shuttle AK31v2
[ALSA] hda-codec - Fix input_mux numbers for vaio stac92xx
... -
Make the SPI framework and drivers stop using class_device. Update docs
accordingly ... highlighting just which sysfs paths should be
"safe"/stable.Signed-off-by: Tony Jones
Signed-off-by: David Brownell
Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
16 Oct, 2007
1 commit
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This patch adds support for the AT73C213 DAC using the misc Atmel SSC driver in
I2S mode. The driver also requires a SPI to setup the registers and control
volume.
It has been tested with an AT32AP7000 on the ATSTK1000 development board. The
driver should also work with any Atmel device with an SSC module supported by
the Atmel SSC driver (atmel-ssc).
The atmel-ssc driver is just submitted to the Linux kernel. Please see mail
thread http://lkml.org/lkml/2007/7/16/32Signed-off-by: Hans-Christian Egtvedt
Signed-off-by: Takashi Iwai
Signed-off-by: Jaroslav Kysela
24 Sep, 2007
1 commit
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This is the latest version of the MMC-over-SPI support. It works
on 2.6.23-rc2 plus git-mmc (from rc1-mm2), along with the preceding
patches which teach the rest of the MMC stack about SPI.The main issue of note is that sometimes cards need to be power cycled
to recover after certain faults. Also, it may sometimes be necessary
to disable CRCs. ("modprobe mmc_core use_spi_crc=n")Signed-off-by: David Brownell
Cc: mikael.starvik@axis.com,
Cc: Hans-Peter Nilsson
Cc: Jan Nikitenko
Cc: Mike Lavender
Signed-off-by: Pierre Ossman
01 Aug, 2007
3 commits
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This adds kerneldoc to the SPI framework. The "spi_driver" and
"spi_board_info" structs were previously not described.Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The spidev driver doesn't currently expose all SPI communications modes to
userspace. This passes them all through to the driver.Two of them are potentially troublesome, in the sense that they could cause
hardware conflicts on shared busses. It might be appropriate to add some
privilege checks for for those modes.Signed-off-by: Anton Vorontsov
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Loopback mode is supported by various controllers. This mode can be
useful for testing, especially in conjunction with spidev driver.Signed-off-by: Anton Vorontsov
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
18 Jul, 2007
5 commits
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Pendown status from the PENIRQ pin is currently read only at the beginning
of a sample set. If the pen is lifted just after sampling has began then
sampled values become wrong.This patch adds an optional platform penirq_recheck_delay attribute. If
non-zero, samples are only reported to the input subsystem if PENIRQ is
still active that long after the samples taken.Signed-off-by: Semih Hazar
Signed-off-by: David Brownell
Signed-off-by: Dmitry Torokhov -
The ads7846 driver has support for filtering, but when the chip gets
deselected between samples this causes noise. This patch adds support
for an optional settling delay time, so that two consecutive samples
will be taken with the specified delay time apart. This ensures that
the chip won't be deselected, so the noise won't appear.Filtering can still be done, but will have less work to do since each
time a new sample is taken the same delay applies.Signed-off-by: Semih Hazar
Signed-off-by: David Brownell
Signed-off-by: Dmitry Torokhov -
Add support for the Infineon TLE62x0 series of low-side driver chips, such
as the TLE6220 or TLE6230. These can be viewed as output GPIOs specialized
for power switching applications. The driver provides a userspace
interface to those GPIOs, and to the switch status they provide.Signed-off-by: Ben Dooks
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add a new spi->mode bit: SPI_3WIRE, for chips where the SI and SO signals
are shared (and which are thus only half duplex). Update the LM70 driver
to require support for that hardware mode from the controller.Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Minor SPI controller driver updates: make the setup() methods reject
spi->mode bits they don't support, by masking aginst the inverse of bits
they *do* support. This insures against misbehavior later when new mode
bits get added.Most controllers can't support SPI_LSB_FIRST; more handle SPI_CS_HIGH.
Support for all four SPI clock/transfer modes is routine.Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Jun, 2007
1 commit
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Update two points in the SPI interface documentation:
- Update description of the "chip stays selected after message ends"
mode. In some cases it's required for correctness; it isn't just a
performance tweak. (Yes: to use this mode on mult-device busses, another
programming interface will be needed. One draft has been circulated
already.)- Clarify spi_setup(), highlighting that callers must ensure that no
requests are queued (can't change configuration except between I/Os), and
that the device must be deselected when this returns (which is a key part
of why it's called during device init).Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 May, 2007
2 commits
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Various documentation updates for the SPI infrastructure, to clarify things
that may not have been clear, to cope with lack of editing, and fix
omissions.Also, plug SPI into the kernel-api DocBook template, and fix all the
resulting glitches in document generation.Signed-off-by: David Brownell
Cc: "Randy.Dunlap"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add a filesystem API for stack. The initial version of
this interface is purely synchronous.dbrownell@users.sourceforge.net:
Cleaned up, bugfixed; much simplified; added preliminary documentation.
Works with mdev given CONFIG_SYSFS_DEPRECATED; and presumably udev.
Updated SPI_IOC_MESSAGE ioctl to full spi_message semantics, supporting
groups of one or more transfers (each of which may be full duplex if
desired).This is marked as EXPERIMENTAL with an explicit disclaimer that the API
(notably the ioctls) is subject to change.Signed-off-by: Andrea Paterniani
Signed-off-by: David Brownell
Cc: Arnd Bergmann
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
08 May, 2007
1 commit
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This adds support for the Analog Devices Blackfin processor architecture, and
currently supports the BF533, BF532, BF531, BF537, BF536, BF534, and BF561
(Dual Core) devices, with a variety of development platforms including those
avaliable from Analog Devices (BF533-EZKit, BF533-STAMP, BF537-STAMP,
BF561-EZKIT), and Bluetechnix! Tinyboards.The Blackfin architecture was jointly developed by Intel and Analog Devices
Inc. (ADI) as the Micro Signal Architecture (MSA) core and introduced it in
December of 2000. Since then ADI has put this core into its Blackfin
processor family of devices. The Blackfin core has the advantages of a clean,
orthogonal,RISC-like microprocessor instruction set. It combines a dual-MAC
(Multiply/Accumulate), state-of-the-art signal processing engine and
single-instruction, multiple-data (SIMD) multimedia capabilities into a single
instruction-set architecture.The Blackfin architecture, including the instruction set, is described by the
ADSP-BF53x/BF56x Blackfin Processor Programming Reference
http://blackfin.uclinux.org/gf/download/frsrelease/29/2549/Blackfin_PRM.pdfThe Blackfin processor is already supported by major releases of gcc, and
there are binary and source rpms/tarballs for many architectures at:
http://blackfin.uclinux.org/gf/project/toolchain/frs There is complete
documentation, including "getting started" guides available at:
http://docs.blackfin.uclinux.org/ which provides links to the sources and
patches you will need in order to set up a cross-compiling environment for
bfin-linux-uclibcThis patch, as well as the other patches (toolchain, distribution,
uClibc) are actively supported by Analog Devices Inc, at:
http://blackfin.uclinux.org/We have tested this on LTP, and our test plan (including pass/fails) can
be found at:
http://docs.blackfin.uclinux.org/doku.php?id=testing_the_linux_kernel[m.kozlowski@tuxland.pl: balance parenthesis in blackfin header files]
Signed-off-by: Bryan Wu
Signed-off-by: Mariusz Kozlowski
Signed-off-by: Aubrey Li
Signed-off-by: Jie Zhang
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Mar, 2007
1 commit
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Fix a bug in the cleanup of an spi_bitbang bus.
The workqueue associated with the bus was destroyed before the call to
spi_unregister_master. That meant that spi devices on that bus would be
unable to do IO in their remove method. The shutdown flag should have been
able to prevent a segfault, but was never getting set. By waiting to
destroy the workqueue until after the master is unregistered, devices are
able to do IO in their remove methods. An added benefit is that neither
the shutdown flag nor a wait for the queue of messages to empty is needed.Signed-off-by: Chris Lesiak
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Feb, 2007
5 commits
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This is adds a simple SPI EEPROM driver, providing access to the EEPROM
through sysfs much like the I2C "eeprom" driver ... except this driver
supports write access, and multiple EEPROM sizes.From: "Tuppa, Walter"
Since I have EEPROMs on SPI with different address sizing, I made some
changes to your at25.c to support them. Works perfectly. (Also includes a
small bugfix for the "what size address" test.)Signed-off-by: David Brownell
Signed-off-by: Walter Tuppa
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This clarifies some aspects of the SPI programming interface, based on
feedback from Hans-Peter Nilsson. The in-memory representation of words is
right-aligned, so for example a twelve bit word is stored using sixteen bits
with four undefined bits in the MSB. And controller drivers must reject
protocol tweaking modes they do not support.Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
I'd like to assign NULL to kfree()d members of a structure. I can't do
that without ugly casting (see the PXA patch) when the structure pointed to
is const-qualified. I don't really see a reason why the cleanup method
isn't allowed to alter the object it should clean up. :-)No, I didn't test the PXA patch, but I verified that the NULL-assignment
doesn't stop me from doing rmmod/insmodding my own spi_bitbang-based
driver.Signed-off-by: Hans-Peter Nilsson
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Make the spi_unregister_driver() code fit in with the rest of the header
file, and only do the action if the driver passed is non-NULL.This also makes the code a line smaller.
Signed-off-by: Ben Dooks
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add wrappers for getting and setting the driver data using spi_device
instead of using dev_{get|set}_drvdata with &spi->dev, to mirror the
platform_{get|set}_drvdata.Signed-off-by: Ben Dooks
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
10 Feb, 2007
1 commit
08 Feb, 2007
2 commits
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This reverts commit 2943ecf2ed32632473c06f1975db47a7aa98c10f.
This should go through the SPI maintainer, it was my fault that it did
not. Especially as it conflicts with other patches he has pending.Signed-off-by: Greg Kroah-Hartman
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Converts from using struct "class_device" to "struct device" making
everything show up properly in /sys/devices/ with symlinks from the
/sys/class directory.Cc:
Signed-off-by: Greg Kroah-Hartman
18 Jan, 2007
2 commits
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On some LCDs leaving the Vref on provides much better readings.
Signed-off-by: Jarkko Oikarinen
Signed-off-by: Imre Deak
Signed-off-by: Juha Yrjola
Signed-off-by: David Brownell
Signed-off-by: Dmitry Torokhov -
Some LCDs like the LS041Y3 require a customized filtering
logic for reliable readings, so make the filtering function
replacable through platform specific hooks.Signed-off-by: Imre Deak
Signed-off-by: Juha Yrjola
Signed-off-by: David Brownell
Signed-off-by: Dmitry Torokhov
31 Dec, 2006
1 commit
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Some issues were recently turned up with the current specification of what
it means for spi_transfer.tx_buf to be null, as part of transfers which are
(from the SPI protocol driver perspective) pure reads.Specifically, that it seems better to change the TX behaviour there from
"undefined" to "will shift zeroes". This lets protocol drivers (like the
ads7846 driver) depend on that behavior. It's what most controller drivers
in the tree are already doing (with one exception and one case of driver
wanting-to-oops), it's what Microwire hardware will necessarily be doing,
and it removes an issue whereby certain security audits would need to
define such a value anyway as part of removing covert channels.This patch changes the specification to require shifting zeroes, and
updates all currently merged SPI controller drivers to do so.Signed-off-by: David Brownell
Signed-off-by: Kumar Gala
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
29 Jun, 2006
1 commit
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This patch adds earlier initialization of spi_device.mode, as needed
on boards using nondefault chipselect polarity. An example would be
ones using the RS5C348 RTC without an external signal inverter between
the RTC chipselect and the SPI controller.Without this mechanism, the first setup() call for that chip would
wrongly enable chips, corrupting transfers to/from other chips sharing
that SPI bus.Signed-off-by: David Brownell
Signed-off-by: Linus Torvalds
17 May, 2006
5 commits
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We need to be able to have a "SPI bus 0" matching chip numbering; but
that number was wrongly used to flag dynamic allocation of a bus number.This patch resolves that issue; now negative numbers trigger dynamic alloc.
It also updates the how-to-write-a-controller-driver overview to mention
this stuff.Signed-off-by: David Brownell
Signed-off-by: Greg Kroah-Hartman -
Add spi_device hook for LSB-first word encoding, and update all the
(in-tree) controller drivers to reject such devices. Eventually,
some controller drivers will be updated to support lsb-first encodings
on the wire; no current drivers need this.Signed-off-by: David Brownell
Signed-off-by: Greg Kroah-Hartman -
Renamed bitbang_transfer_setup to follow convention of other exported symbols
from spi-bitbang. Exported spi_bitbang_setup_transfer to allow users of
spi-bitbang to use the function in their own setup_transfer.Signed-off-by: Kumar Gala
Cc: David Brownell
Signed-off-by: Greg Kroah-Hartman -
This removes superfluous whitespace in the header.
Signed-off-by: David Brownell
Signed-off-by: Greg Kroah-Hartman -
Some protocols (like one for some bitmap displays) require different clock
speed or word size settings for each transfer in an SPI message. This adds
those parameters to struct spi_transfer. They are to be used when they are
nonzero; otherwise the defaults from spi_device are to be used.The patch also adds a setup_transfer callback to spi_bitbang, uses it for
messages that use those overrides, and implements it so that the pure
bitbanging code can help resolve any questions about how it should work.Signed-off-by: Imre Deak
Signed-off-by: David Brownell
Signed-off-by: Greg Kroah-Hartman
26 Apr, 2006
1 commit
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Providing more accurate coordinates for thumb press requires additional
steps in the filtering logic:- Ignore samples found invalid by the debouncing logic, or the ones that
have out of bound pressure value.
- Add a parameter to repeat debouncing, so that more then two consecutive
good readings are required for a valid sample.Signed-off-by: Imre Deak
Acked-by: Juha Yrjola
Signed-off-by: Dmitry Torokhov
12 Apr, 2006
2 commits
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The pen down IRQ will toggle during each X,Y,Z measurement cycle.
Even though the IRQ is disabled it will be latched and delivered
when after enable_irq. Thus in the IRQ handler we must avoid
starting a new measurement cycle when such an "unwanted" IRQ happens.
Add a get_pendown_state platform function, which will probably
determine this by reading the current GPIO level of the pen IRQ pin.Move the IRQ reenabling from the SPI RX function to the timer. After
the last power down message the pen IRQ pin is still active for a
while and get_pendown_state would report incorrectly a pen down state.When suspending we should check the ts->pending flag instead of
ts->pendown, since the timer can be pending regardless of ts->pendown.
Also if ts->pending is set we can be sure that the timer is running,
so no need to rearm it. Similarly if ts->pending is not set we can
be sure that the IRQ is enabled (and the timer is not).Signed-off-by: Imre Deak
Signed-off-by: David Brownell
Signed-off-by: Dmitry Torokhov -
Some touchscreens seem to oscillate heavily for a while after touching
the screen. Implement support for sampling the screen until we get two
consecutive values that are close enough.Signed-off-by: Imre Deak
Signed-off-by: Juha Yrjola
Signed-off-by: David Brownell
Signed-off-by: Dmitry Torokhov
14 Jan, 2006
3 commits
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gcc4 generates warnings when a non-FASTCALL function pointer is assigned to a
FASTCALL one. Perhaps it has taste.Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Greg Kroah-Hartman -
This makes the SPI core and its users access transfers in the SPI message
structure as linked list not as an array, as discussed on LKML.From: David Brownell
Updates including doc, bugfixes to the list code, add
spi_message_add_tail(). Plus, initialize things _before_ grabbing the
locks in some cases (in case it grows more expensive). This also merges
some bitbang updates of mine that didn't yet make it into the mm tree.Signed-off-by: Vitaly Wool
Signed-off-by: Dmitry Pervushin
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Greg Kroah-Hartman -
This was originally a driver for the ST M25P80 SPI flash. It's been
updated slightly to handle other M25P series chips.For many of these chips, the specific type could be probed, but for now
this just requires static setup with flash_platform_data that lists the
chip type (size, format) and any default partitioning to use.Signed-off-by: David Brownell
Cc: Mike Lavender
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Greg Kroah-Hartman
