17 Sep, 2009
1 commit
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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
Acked-by: David Brownell
Signed-off-by: Samuel Ortiz
13 Jul, 2009
1 commit
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* Remove smp_lock.h from files which don't need it (including some headers!)
* Add smp_lock.h to files which do need it
* Make smp_lock.h include conditional in hardirq.h
It's needed only for one kernel_locked() usage which is under CONFIG_PREEMPTThis will make hardirq.h inclusion cheaper for every PREEMPT=n config
(which includes allmodconfig/allyesconfig, BTW)Signed-off-by: Alexey Dobriyan
Signed-off-by: Linus Torvalds
03 Jul, 2009
2 commits
-
Signed-off-by: Yoichi Yuasa
Signed-off-by: Ralf Baechle -
Signed-off-by: Yoichi Yuasa
Signed-off-by: Ralf Baechle
01 Jul, 2009
2 commits
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IRQ handling is wrong for any GPIO >= PL061_GPIO_NR.
Fix this by implementing and using a proper .to_irq method.
Signed-off-by: Baruch Siach
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Note that IRQ has not been initialized when kmalloc() fails.
Also, use DECLARE_BITMAP() to make the code clearer.
Signed-off-by: Baruch Siach
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
20 Jun, 2009
1 commit
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This is a driver for the ARM PrimeCell PL061 GPIO AMBA peripheral. The
driver is implemented using the gpiolib framework.This driver also includes support for the use of the PL061 as an interrupt
controller (secondary).Signed-off-by: Baruch Siach
Cc: David Brownell
Acked-by: Russell King
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
19 Jun, 2009
4 commits
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PCA9556 is the software-compatible predecessor to the PCA9557, so add it
to the supported I2C device ID table.Signed-off-by: Nate Case
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
On OpenFirmware platforms, it makes the most sense to get platform_data
from the device tree. Make an attempt to translate OF node properties
into platform_data struct before bailing out.Note that the implementation approach taken differs from other device
drivers that make use of device tree information. This is because I2C
chips are already registered automatically by of_i2c, so we can get by
with a small translator function in the driver.[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: kfree(NULL) is legal]
Signed-off-by: Nate Case
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The remove member of the spi_driver max7301_driver uses __devexit_p(), so
the remove function itself should be marked with __devexit. Even more so
considering the probe function is marked with __devinit.Signed-off-by: Mike Frysinger
Acked-by: Juergen Beisert
Cc: Dmitry Baryshkov
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add support to the PCA953x driver to use the GPIOLIB naming facility for
GPIOs.Signed-off-by: Daniel Silverstone
Cc: Ben Gardner
Cc: Jean Delvare
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
21 May, 2009
1 commit
-
Signed-off-by: Michal Simek
04 Apr, 2009
1 commit
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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (28 commits)
trivial: Update my email address
trivial: NULL noise: drivers/mtd/tests/mtd_*test.c
trivial: NULL noise: drivers/media/dvb/frontends/drx397xD_fw.h
trivial: Fix misspelling of "Celsius".
trivial: remove unused variable 'path' in alloc_file()
trivial: fix a pdlfush -> pdflush typo in comment
trivial: jbd header comment typo fix for JBD_PARANOID_IOFAIL
trivial: wusb: Storage class should be before const qualifier
trivial: drivers/char/bsr.c: Storage class should be before const qualifier
trivial: h8300: Storage class should be before const qualifier
trivial: fix where cgroup documentation is not correctly referred to
trivial: Give the right path in Documentation example
trivial: MTD: remove EOL from MODULE_DESCRIPTION
trivial: Fix typo in bio_split()'s documentation
trivial: PWM: fix of #endif comment
trivial: fix typos/grammar errors in Kconfig texts
trivial: Fix misspelling of firmware
trivial: cgroups: documentation typo and spelling corrections
trivial: Update contact info for Jochen Hein
trivial: fix typo "resgister" -> "register"
...
03 Apr, 2009
2 commits
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We want to phase out the GPIO "autorequest" mechanism in gpiolib and
require all callers to use gpio_request().- Update feature-removal-schedule
- Update the documentation now
- Convert the relevant pr_warning() in gpiolib to a WARN()
so folk using this mechanism get a noisy stack dumpSome drivers and board init code will probably need to change.
Implementations not using gpiolib will still be fine; they are already
required to implement gpio_{request,free}() stubs.Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Allow GPIOs in GPIOLIB chips to be named. This name is then used when the
GPIO is exported to sysfs, although it could be used elsewhere if deemed
useful.Signed-off-by: Daniel Silverstone
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
30 Mar, 2009
1 commit
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Signed-off-by: Matt LaPlante
Acked-by: Randy Dunlap
Signed-off-by: Jiri Kosina
25 Mar, 2009
1 commit
-
Cc: Michael Buesch
Acked-by: Greg Kroah-Hartman
Signed-off-by: Kay Sievers
30 Jan, 2009
1 commit
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Fix request-already-requested handling in gpio_request().
Signed-off-by: Magnus Damm
Acked-by: David Brownell
Cc: [2.6.28.x]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
16 Jan, 2009
1 commit
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A number of drivers in drivers/gpio return -ENODEV when confronted with
missing setup parameters such as the platform data. However, returning
-ENODEV causes the driver layer to silently ignore the driver as it
assumes the probe did not find anything and was only speculative.To make life easier to discern why a driver is not being attached, change
to returning -EINVAL, which is a better description of the fact that the
driver data was not valid.Also add a set of dev_dbg() statements to the error paths to provide an
better explanation of the error as there may be more that one point in the
driver.Signed-off-by: Ben Dooks
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
07 Jan, 2009
4 commits
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* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (60 commits)
uio: make uio_info's name and version const
UIO: Documentation for UIO ioport info handling
UIO: Pass information about ioports to userspace (V2)
UIO: uio_pdrv_genirq: allow custom irq_flags
UIO: use pci_ioremap_bar() in drivers/uio
arm: struct device - replace bus_id with dev_name(), dev_set_name()
libata: struct device - replace bus_id with dev_name(), dev_set_name()
avr: struct device - replace bus_id with dev_name(), dev_set_name()
block: struct device - replace bus_id with dev_name(), dev_set_name()
chris: struct device - replace bus_id with dev_name(), dev_set_name()
dmi: struct device - replace bus_id with dev_name(), dev_set_name()
gadget: struct device - replace bus_id with dev_name(), dev_set_name()
gpio: struct device - replace bus_id with dev_name(), dev_set_name()
gpu: struct device - replace bus_id with dev_name(), dev_set_name()
hwmon: struct device - replace bus_id with dev_name(), dev_set_name()
i2o: struct device - replace bus_id with dev_name(), dev_set_name()
IA64: struct device - replace bus_id with dev_name(), dev_set_name()
i7300_idle: struct device - replace bus_id with dev_name(), dev_set_name()
infiniband: struct device - replace bus_id with dev_name(), dev_set_name()
ISDN: struct device - replace bus_id with dev_name(), dev_set_name()
... -
Minor updates to the pca953x GPIO expander driver: handle several more
compatible parts, and stop assuming that the I2C layer's return codes are
garbage (that's now been fixed).Signed-off-by: David Brownell
Cc: Eric Miao
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Provide a static debounce configuration mechanism for twl4030 GPIOs,
replacing the previous dynamic one. The single user of that mechanism was
for MMC card detect debouncing.Boards can provide a bitmask saying which GPIOs to debounce (30 msec).
It's always enabled for pins with the MMC card-detect/VMMCx link active,
so most boards won't need to set the debounce mask.This is a net code shrink, including runtime footprint.
Signed-off-by: David Brownell
Signed-off-by: Tony Lindgren
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Kay Sievers
Signed-off-by: Greg Kroah-Hartman
20 Nov, 2008
1 commit
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There are already various drivers having bigger label than 12 bytes. Most
of them fit well under 20 bytes but make column width exact so that
oversized labels don't mess up output alignment.Signed-off-by: Jarkko Nikula
Acked-by: David Brownell
Cc: [2.6.26.x, 2.6.26.x, 2.6.27.x]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Nov, 2008
1 commit
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This driver supports the Xilinx XPS GPIO IP core which has the typical
GPIO features.Signed-off-by: Kiran Sutariya
Signed-off-by: John Linn
Cc: David Brownell
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Kumar Gala
Cc: "Grant Likely"
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
22 Oct, 2008
1 commit
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This adds basic support for the GPIOs in the twl4030 power management
chip. That includes two open drain LED drivers, and the use of GPIO-0
(and GPIO-1) as MMC/SD card detect switches which can control whether
the VMMC1 (and VMMC2) regulators are active.This version of the code has a debounce call that will probably be
replaced before long, when a more generic interface exists.Signed-off-by: David Brownell
Signed-off-by: Tony Lindgren
Signed-off-by: Samuel Ortiz
21 Oct, 2008
1 commit
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…/git/tip/linux-2.6-tip
This merges branches irq/genirq, irq/sparseirq-v4, timers/hpet-percpu
and x86/uv.The sparseirq branch is just preliminary groundwork: no sparse IRQs are
actually implemented by this tree anymore - just the new APIs are added
while keeping the old way intact as well (the new APIs map 1:1 to
irq_desc[]). The 'real' sparse IRQ support will then be a relatively
small patch ontop of this - with a v2.6.29 merge target.* 'genirq-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (178 commits)
genirq: improve include files
intr_remapping: fix typo
io_apic: make irq_mis_count available on 64-bit too
genirq: fix name space collisions of nr_irqs in arch/*
genirq: fix name space collision of nr_irqs in autoprobe.c
genirq: use iterators for irq_desc loops
proc: fixup irq iterator
genirq: add reverse iterator for irq_desc
x86: move ack_bad_irq() to irq.c
x86: unify show_interrupts() and proc helpers
x86: cleanup show_interrupts
genirq: cleanup the sparseirq modifications
genirq: remove artifacts from sparseirq removal
genirq: revert dynarray
genirq: remove irq_to_desc_alloc
genirq: remove sparse irq code
genirq: use inline function for irq_to_desc
genirq: consolidate nr_irqs and for_each_irq_desc()
x86: remove sparse irq from Kconfig
genirq: define nr_irqs for architectures with GENERIC_HARDIRQS=n
...
20 Oct, 2008
2 commits
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We can get the following oops from gpio_get_value_cansleep() when a GPIO
controller doesn't provide a get() callback:Unable to handle kernel paging request for instruction fetch
Faulting instruction address: 0x00000000
Oops: Kernel access of bad area, sig: 11 [#1]
[...]
NIP [00000000] 0x0
LR [c0182fb0] gpio_get_value_cansleep+0x40/0x50
Call Trace:
[c7b79e80] [c0183f28] gpio_value_show+0x5c/0x94
[c7b79ea0] [c01a584c] dev_attr_show+0x30/0x7c
[c7b79eb0] [c00d6b48] fill_read_buffer+0x68/0xe0
[c7b79ed0] [c00d6c54] sysfs_read_file+0x94/0xbc
[c7b79ef0] [c008f24c] vfs_read+0xb4/0x16c
[c7b79f10] [c008f580] sys_read+0x4c/0x90
[c7b79f40] [c0013a14] ret_from_syscall+0x0/0x38It's OK to request the value of *any* GPIO; most GPIOs are bidirectional,
so configuring them as outputs just enables an output driver and doesn't
disable the input logic.So the problem is that gpio_get_value_cansleep() isn't making the same
sanity check that gpio_get_value() does: making sure this GPIO isn't one
of the atypical "no input logic" cases.Reported-by: Anton Vorontsov
Signed-off-by: David Brownell
Cc: [2.6.27.x, 2.6.26.x, 2.6.25.x]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
gpiolib can export GPIOs to userspace via sysfs. This patch modifies the
gpio_value_show() so that any non-zero value is explicitly printed as "1",
rather than whatever numerical value the lower-level driver returns.Signed-off-by: Steve Falco
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Oct, 2008
6 commits
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Add a new internal mechanism to gpiolib to support low power
operations by letting gpio_chip instances see when their GPIOs
are in use. When no GPIOs are active, chips may be able to
enter lower powered runtime states by disabling clocks and/or
power domains.Signed-off-by: David Brownell
Cc: "Magnus Damm"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add a new gpiolib mechanism: gpio_chip instances can provide mappings
between their (input) GPIOs and any associated IRQs. This makes it easier
for platforms to support IRQs that are provided by board-specific external
chips instead of as part of their core (such as SOC-integrated GPIOs).Also update the irq_to_gpio() description, saying to avoid it because it's
not always supported.Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Make the I2C external GPIO expander drivers register themselves at
subsys_initcall() time when they're statically linked.SOC-integrated GPIOs are available starting very early -- early in
arch_initcall() at latest, but often even before initcalls start to run --
so this improves consistency, so more subsystems can rely on GPIOs in
their own subsys_initcall() code.(This isn't a theoretical problem. This is one of several patches needed
to resolve oopsing observed when statically linking kernels on a DaVinci
EVM. Its pcf857x GPIOs needed to be available well before some other
drivers initialized.)Signed-off-by: David Brownell
Cc: Jean Delvare
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
According to the documentation gpio_free should only be called from task
context only. To make this more explicit add a might sleep to all
implementations.This is the generic part which changes gpiolib and the fallback
implementation only.Signed-off-by: Uwe Kleine-König
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
There is a small race and code ugliness in max7301: pins are reconfigured
after the chip is registered. Swap these calls so that the device is
registered in correct state.Also this fixes the comile-time warning about unchecked gpiochip_remove.
Signed-off-by: Dmitry Baryshkov
Cc: Juergen Beisert
Cc: Guennadi Liakhovetski
Cc: Russell King
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Make the SPI external GPIO expander drivers register themselves at
subsys_initcall() time when they're statically linked, and make the SPI
core do its driver model initialization earlier so that's safe.SOC-integrated GPIOs are available starting very early -- often before
initcalls start to run, or earily in arch_initcall() at latest -- so this
improves consistency, letting more subsystems rely on GPIOs being usable
by their own subsys_initcall() code.Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
16 Oct, 2008
1 commit
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add CONFIG_HAVE_SPARSE_IRQ to for use condensed array.
Get rid of irq_desc[] array assumptions.Preallocate 32 irq_desc, and irq_desc() will try to get more.
( No change in functionality is expected anywhere, except the odd build
failure where we missed a code site or where a crossing commit itroduces
new irq_desc[] usage. )v2: according to Eric, change get_irq_desc() to irq_desc()
Signed-off-by: Yinghai Lu
Signed-off-by: Ingo Molnar
26 Jul, 2008
4 commits
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This adds a driver supporting a family of I2C port expanders from Maxim,
which includes the MAX7319 and MAX7320-7327 chips.[dbrownell@users.sourceforge.net: minor fixes]
Signed-off-by: Jack Ren
Signed-off-by: Eric Miao
Acked-by: Jean Delvare
Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch adds functionality to the gpio-lib subsystem to make it
possible to enable the gpio-lib code even if the architecture code didn't
request to get it built in.The archtitecture code does still need to implement the gpiolib accessor
functions in its asm/gpio.h file. This patch adds the implementations for
x86 and PPC.With these changes it is possible to run generic GPIO expansion cards on
every architecture that implements the trivial wrapper functions. Support
for more architectures can easily be added.Signed-off-by: Michael Buesch
Cc: Benjamin Herrenschmidt
Cc: Stephen Rothwell
Cc: David Brownell
Cc: Russell King
Cc: Haavard Skinnemoen
Cc: Jesper Nilsson
Cc: Ralf Baechle
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: Jean Delvare
Cc: Samuel Ortiz
Cc: Kumar Gala
Cc: Sam Ravnborg
Cc: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This adds the bt8xxgpio driver. The purpose of the bt8xxgpio driver is to
export all of the 24 GPIO pins available on Brooktree 8xx chips to the
kernel GPIO infrastructure.This makes it possible to use a physically modified BT8xx card as
cheap digital GPIO card.[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Michael Buesch
Cc: David Brownell
Cc: Stephen Rothwell
Cc: Mauro Carvalho Chehab
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Teach the mcp23s08 driver about a curious feature of these chips: up to
four of them can share the same chipselect, with the SPI signals wired in
parallel, by matching two bits in the first protocol byte against two
address lines on the chip.This is handled by three software changes:
* Platform data now holds an array of per-chip structs, not
just one chip's address and pullup configuration.* Probe() and remove() now use another level of structure,
wrapping an instance of the original structure for each
mcp23s08 chip sharing that chipselect.* The HAEN bit is set, so that the hardware address bits can no
longer be ignored (boot firmware may not have enabled them).The "one struct per chip" preserves the guts of the current code,
but platform_data will need minor changes.OLD:
/* incorrect "slave" ID may not have mattered */
.slave = 3,
.pullups = BIT(3) | BIT(1) | BIT(0),NEW:
/* slave address _must_ match chip's wiring */
.chip[3] = {
.is_present = true,
.pullups = BIT(3) | BIT(1) | BIT(0),
},There's no change in how things _behave_ for spi_device nodes with a
single mcp23s08 chip. New multi-chip configurations assign GPIOs in
sequence, without holes. The spi_device just resembles a bigger
controller, but internally it has multiple gpio_chip instances.Signed-off-by: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
