mfd: Add HTCPLD driver
This change introduces a driver for the HTC PLD chip found
on some smartphones, such as the HTC Wizard and HTC Herald.
It works through the I2C bus and acts as a GPIO extender.
Specifically:
* it can have several sub-devices, each with its own I2C
address
* Each sub-device provides 8 output and 8 input pins
* The chip attaches to one GPIO to signal when any of the
input GPIOs change -- at which point all chips must be
scanned for changes
This driver implements the GPIOs throught the kernel's
GPIO and IRQ framework. This allows any GPIO-servicing
drivers to operate on htcpld pins, such as the gpio-keys
and gpio-leds drivers.
Signed-off-by: Cory Maccarrone <darkstar6262@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index d63ab2e..9bcd447 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -78,6 +78,15 @@
HTC Magician devices, respectively. Actual functionality is
handled by the leds-pasic3 and ds1wm drivers.
+config HTC_I2CPLD
+ bool "HTC I2C PLD chip support"
+ depends on I2C=y
+ help
+ If you say yes here you get support for the supposed CPLD
+ found on omap850 HTC devices like the HTC Wizard and HTC Herald.
+ This device provides input and output GPIOs through an I2C
+ interface to one or more sub-chips.
+
config UCB1400_CORE
tristate "Philips UCB1400 Core driver"
depends on AC97_BUS