Commit graph

12 commits

Author SHA1 Message Date
Mark Brown
404ba2b8f6 gpio: pca953x: Staticise pca953x_get_altdata()
It's not used outside of the driver so doesn't need to be exported, and
sparse notices this and complains about it.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-11-21 20:53:15 +01:00
Linus Torvalds
80f01ca1fc Merge branch 'gpio/merge' of git://git.secretlab.ca/git/linux-2.6
* 'gpio/merge' of git://git.secretlab.ca/git/linux-2.6:
  gpio: pca953x: propagate the errno from the chip_init functions
  gpio: pca953x: remove unneeded check for chip type
  gpio/omap: check return value from irq_alloc_generic_chip
  gpio/omap: replace MOD_REG_BIT macro with static inline
2011-11-15 14:45:50 -02:00
Wolfram Sang
7ea2aa2046 gpio: pca953x: propagate the errno from the chip_init functions
Initializing the chips may return with an error, but this error gets
dropped in probe(). Propagate this further to the driver core. Also,
simplify returning the error in one of the init functions.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-10-29 12:26:29 +02:00
Wolfram Sang
f0eb824bee gpio: pca953x: remove unneeded check for chip type
We can assume our own device_id table is correct, so remove checking if
the chip type is valid. (The check was bogus anyway: If it found an
invalid entry, it returned with 0!) This is in preparation for further
cleanups.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-10-29 12:26:29 +02:00
Hartmut Knaack
25fcf2b7f1 gpio-pca953x: fix gpio_base
gpio_base was set to 0 if no system platform data or open firmware
platform data was provided. This led to conflicts, if any other gpiochip
with a gpiobase of 0 was instantiated already. Setting it to -1 will
automatically use the first one available.

Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-10-13 13:49:37 -06:00
David Jander
a57339b4b5 gpio/pca953x: Deprecate meaningless device-tree bindings
The property 'polarity' is handled by the GPIO core, and the 'gpio-base'
should be assigned automatically. It is meaningless in the device-tree,
since GPIO's are identified by the "chip-name"/offset pair.
This way, the whole pca953x_get_alt_pdata() can hopefully soon go away.
We still need to check whether we really want GPIO-interrupt functionality
by simply looking if the I2C node has an interrupts property defined, since
this property is not used for anything else.

Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-16 13:41:50 -06:00
David Jander
c6dcf59243 gpio/pca953x: Remove dynamic platform data pointer
In the case that we obtain device-tree data to fill in platform_data, the new
platform data struct was dynamically allocated, but the pointer to it was not
used everywhere it should. It seems easier to fix this issue by removing the
dynamic allocation altogether since its data is only used during driver
probing.

Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-16 13:41:49 -06:00
David Jander
c609c05db1 gpio/pca953x: Fix IRQ support.
It seems that in the normal case, IRQ_NOREQUEST needs to be explicitly
cleared, otherwise claiming the interrupt fails.
In the case of sparse interrupts, the descriptor needs to be allocated
first.

Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-16 13:41:48 -06:00
David Jander
6dd599f8af gpio/pca953x: Fix warning of enabled interrupts in handler
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 <david@protonic.nl>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-08 11:37:45 -06:00
David Jander
17e8b42c17 gpio/pca953x: Interrupt pin is active-low
The interrupt pin of the PCA953x is active low, and on the rising edge
no interrupt should be produced.

Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-08 11:34:41 -06:00
David Jander
910c8fb6b4 gpio/pca953x: Fix IRQ support.
It seems that in the normal case, IRQ_NOREQUEST needs to be explicitly
cleared, otherwise claiming the interrupt fails.
In the case of sparse interrupts, the descriptor needs to be allocated
first.

Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-08 11:34:37 -06:00
Grant Likely
c103de2404 gpio: reorganize drivers
Sort the gpio makefile and enforce the naming convention gpio-*.c for
gpio drivers.

v2: cleaned up filenames in Kconfig and comment blocks
v3: fixup use of BASIC_MMIO to GENERIC_GPIO for mxc

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-06 10:10:11 -06:00
Renamed from drivers/gpio/pca953x.c (Browse further)