linux/drivers/gpio, branch v2.6.36

gpio: sx150x: correct and refine reset-on-probe behavior

2010-09-10T01:57:24Z

Replace the arbitrary software-reset call from the device-probe method, because: - It is defective. To work correctly, it should be two byte writes, not a single word write. As it stands, it does nothing. - Some devices with sx150x expanders installed have their NRESET pins ganged on the same line, so resetting one causes the others to reset - not a nice thing to do arbitrarily! - The probe, usually taking place at boot, implies a recent hard-reset, so a software reset at this point is just a waste of energy anyway. Therefore, make it optional, defaulting to off, as this will match the common case of probing at powerup and also matches the current broken no-op behavior. Signed-off-by: Gregory Bean Reviewed-by: Jean Delvare Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

gpiolib: Implement set_debounce for WM831x GPIOs

2010-08-12T09:27:57Z

The debounce times are approximate, they can be selected using the two input functions. Signed-off-by: Mark Brown Signed-off-by: Samuel Ortiz

gpio: Add STMPE GPIO driver

2010-08-12T09:27:55Z

Add support for the GPIOs on STMPE I/O Expanders. [l.fu@pengutronix.de: fix set direction input] [l.fu@pengutronix.de: set GPIO alternate function while requesting] Acked-by: Luotao Fu Acked-by: Linus Walleij Signed-off-by: Rabin Vincent Signed-off-by: Samuel Ortiz

gpio: sx150x: add Semtech I2C sx150x gpio expander driver

2010-08-11T15:59:09Z

Add support for Semtech SX150-series I2C GPIO expanders. Compatible models include: 8 bits: sx1508q 16 bits: sx1509q Signed-off-by: Gregory Bean Cc: David Brownell Cc: Jean Delvare Cc: Trilok Soni Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

gpiolib: allow nested threaded irqs for poll(2)

2010-08-11T15:59:09Z

The pca953x driver requires the use of threaded irqs as its irq demultiplexer can sleep. Our irq handler can be called from any context, so use request_any_context_irq to allow threaded irqs as well. Signed-off-by: Daniel Gl?ckner Reported-by: Ian Jeffray Cc: David Brownell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

gpiolib: get rid of struct poll_desc and worklet

2010-08-11T15:59:08Z

As sysfs_notify_dirent has been made irq safe, there is no reason to not call it directly from irq. With the work_struct removed, the remaining element in poll_desc is a sysfs_dirent pointer which may not be NULL. We can therefore store it directly in the idr and pass it as context to the irq handler. Most part of the patch deals with renaming defines and variables to reflect their new use without functional change. I also took the opportunity to initialize the idr statically. Signed-off-by: Daniel Gl?ckner Cc: David Brownell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

gpiolib: decouple might_sleep_if() from DEBUG

2010-08-11T15:59:08Z

Be more consistent about runtime programming interface abuse warnings, which can reduce some confusion and trigger bugfixes. Based on an observation and patch from Jani Nikula. Also update doc to highlight some sleeping-call issues and to match some recent changes. Signed-off-by: David Brownell Cc: Jani Nikula Cc: "Ryan Mallon" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

pcf857x: support working w/o platform data

2010-08-11T15:59:08Z

Provide sane defaults for pcf857x, so the driver can be used w/o providing platform data (and thus can be simply bound via OF tree). Signed-off-by: Dmitry Eremin-Solenikov Cc: Jean Delvare Cc: David Brownell Cc: Grant Likely Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

gpio: max730x: make pullups configurable via platformdata

2010-08-11T15:59:08Z

The gpios on the max730x chips have support for internal pullups while in input mode. This patch adds support for configuring these pullups via platform data. A new member ("input_pullup_active") to the platform data struct is introduced. A set bit in this variable activates the pullups while the respective port is in input mode. This is a compatible enhancement since unset bits lead to disables pullups which was the default in the original driver. _Note_: the 4 lowest bits in "input_pullup_active" are unused because the first 4 ports of the controller are not used, too. Signed-off-by: Marc Kleine-Budde Reviewed-by: Wolfram Sang Cc: David Brownell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6

2010-08-05T22:57:35Z

* 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6: (63 commits) of/platform: Register of_platform_drivers with an "of:" prefix of/address: Clean up function declarations of/spi: call of_register_spi_devices() from spi core code of: Provide default of_node_to_nid() implementation. of/device: Make of_device_make_bus_id() usable by other code. of/irq: Fix endian issues in parsing interrupt specifiers of: Fix phandle endian issues of/flattree: fix of_flat_dt_is_compatible() to match the full compatible string of: remove of_default_bus_ids of: make of_find_device_by_node generic microblaze: remove references to of_device and to_of_device sparc: remove references to of_device and to_of_device powerpc: remove references to of_device and to_of_device of/device: Replace of_device with platform_device in includes and core code of/device: Protect against binding of_platform_drivers to non-OF devices of: remove asm/of_device.h of: remove asm/of_platform.h of/platform: remove all of_bus_type and of_platform_bus_type references of: Merge of_platform_bus_type with platform_bus_type drivercore/of: Add OF style matching to platform bus ... Fix up trivial conflicts in arch/microblaze/kernel/Makefile due to just some obj-y removals by the devicetree branch, while the microblaze updates added a new file.