linux-toradex.git/drivers/gpio/pca953x.c, branch v3.0.74

gpio/pca953x: Fix warning of enabled interrupts in handler

2012-02-20T20:48:11+00:00

commit 6dd599f8af0166805951f4421a78ba716d78321a upstream.

When using nested threaded irqs, use handle_nested_irq(). This function
does not call the chip handler, so no handler is set.

Signed-off-by: David Jander 
Signed-off-by: Grant Likely 
Cc: Steven Rostedt 
Cc: Yong Zhang 
Cc: Manfred Gruber 
Cc: Thomas Gleixner 
Signed-off-by: Greg Kroah-Hartman

gpio/pca953x: Add support for pca9574 and pca9575 devices

2011-05-26T19:58:30+00:00

PCA957x is i2c gpio expander, and similar to PCA953x. Although register
configurations are different between PCA957x and PCA953x. They can share
a lot of components, such as IRQ handling, GPIO IN/OUT. So updating PCA953x
driver to support PCA957x chips.

Signed-off-by: Haojian Zhuang 
Signed-off-by: Grant Likely

gpio/pca953x: Use handle_simple_irq instead of handle_edge_irq

2011-05-20T06:40:18+00:00

Make pca953x driver use the simple irq handler since no hardware control
is necessary and the driver lacks an irq_ack function. handle_edge_irq()
calls chip->irq_ack() which crashes since this function does not exist.

Signed-off-by: Erik Botö 
Signed-off-by: Richard Röjfors 
Signed-off-by: Grant Likely

gpio/pca953x: fix error handling path in probe() call

2011-03-31T03:28:12+00:00

If the device fails to respond, then the error path tries to remove an
interrupt that never got registered, which causes an backtrace from the
interrupt handling code.

Fix this by ensuring that the cleanup path has two labels and use the
correct path as needed.

fixes the following error:

WARNING: at kernel/irq/manage.c:908 __free_irq+0x80/0x160()
Trying to free already-free IRQ 0

Signed-off-by: Ben Dooks 
Signed-off-by: Mark Brown 
Signed-off-by: Grant Likely

gpio: Cleanup genirq namespace

2011-03-24T23:02:51+00:00

Converted with coccinelle.

Signed-off-by: Thomas Gleixner 
Acked-by: Grant Likely 
LKML-Reference: <20110324212509.025730689@linutronix.de>
Signed-off-by: Thomas Gleixner

Merge commit 'v2.6.38-rc8' into spi/next

2011-03-12T08:25:53+00:00

Conflicts:
	drivers/spi/pxa2xx_spi_pci.c

gpio/pca953x: Fix wrong pointer type

2011-02-24T15:55:02+00:00

pca953x_get_alt_pdata() uses uint16_t* as result type for
of_get_property(), but numeric of values are __be32.

Checking for negative values is bogus because of-property
values are unsigned by definition.
Instead check for proper property size.

v3: - assume big-endian properties
    - check property size
v2: - removed bogus check for negative property values

Signed-off-by: Dirk Eibach 
Signed-off-by: Grant Likely

drivers/gpio/pca953x.c: add a mutex to fix race condition

2011-02-12T00:12:20+00:00

Add a mutex to register communication and handling.  Without the mutex,
GPIOs didn't switch as expected when toggled in a fast sequence of
status changes of multiple outputs.

Signed-off-by: Roland Stigge 
Acked-by: Eric Miao 
Cc: Grant Likely 
Cc: Marc Zyngier 
Cc: Ben Gardner 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

gpio: pca953x: irq_data conversion

2011-01-13T16:03:13+00:00

Converts irq_chips and flow handlers over to the new struct irq_data based
irq_chip functions.

Signed-off-by: Lennert Buytenhek 
Cc: Alek Du 
Cc: Alan Cox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

pca953x: pca953x driver fixes for x86 mrst

2010-10-26T23:52:15+00:00

Our Moorestown platform has two max7315 chips which is covered by pca953x
i2c gpio driver.

A while ago this driver got updated with nested irq thread support, and it
broke the compatibity with "request_irq".  For example, the gpio_keys.c
driver can not work with this driver now.  This patch fixes the issue by
switching to generic_handle_irq.

Also fix the irq_base issue: irq_base == 0 is valid, and a "-1" value
should mean invalid. IRQ 0 is not a valid IRQ, irq_base of 0 is valid.

Signed-off-by: Alek Du 
Signed-off-by: Alan Cox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds