linux-toradex.git/drivers/gpio/max732x.c, branch v3.0.74

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

gpio: max732x: 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 
Acked-by: Marc Zyngier 
Cc: Eric Miao 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

gpio: max732x: fix input configuration for open-drain pins

2010-05-27T16:12:41+00:00

Fix a bug I noticed while hacking on the max732x driver for interrupt
support.  According to the datasheets, open-drain pins have to be
configured as output-high (which in that case is actually high impedance)
to be used as input.

Signed-off-by: Marc Zyngier 
Acked-by: Eric Miao 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

max732x: correct nr_port checking off by one error

2010-05-27T16:12:41+00:00

Setup both client_group_a and client_group_b if nr_port > 8 (not including
nr_port==8).

Signed-off-by: Axel Lin 
Cc: Eric Miao 
Cc: Ben Dooks 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

gpio: add interrupt handling capability to max732x

2010-05-27T16:12:41+00:00

Most of the GPIO expanders supported by the max732x driver have interrupt
generation capability by reporting changes on input pins through an INT#
pin.  This patch implements the irq_chip functionnality (edge detection
only).

Signed-off-by: Marc Zyngier 
Cc: Eric Miao 
Cc: Jebediah Huang 
Cc: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

gpio: fix probe() error return in gpio driver probes

2009-01-16T00:39:35+00:00

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

gpio: i2c expanders use subsys_init

2008-10-16T18:21:40+00:00

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

gpio: max732x driver

2008-07-25T17:53:30+00:00

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