[ARM] 4947/1: htc-egpio, a driver for GPIO/IRQ expanders with fixed i…

…nput/output pins

implemented in CPLD chips on several HTC devices.

The original driver was written by Kevin O'Connor, I have adapted it to
use gpiolib and made the bus/register widths configurable.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/mfd/Kconfig

@@ -22,6 +22,14 @@ config MFD_ASIC3
 	  This driver supports the ASIC3 multifunction chip found on many
 	  PDAs (mainly iPAQ and HTC based ones)
 
+config HTC_EGPIO
+	bool "HTC EGPIO support"
+	depends on GENERIC_HARDIRQS && HAVE_GPIO_LIB
+	help
+	    This driver supports the CPLD egpio chip present on
+	    several HTC phones.  It provides basic support for input
+	    pins, output pins, and irqs.
+
 endmenu
 
 menu "Multimedia Capabilities Port drivers"

drivers/mfd/Makefile

@@ -5,6 +5,8 @@
 obj-$(CONFIG_MFD_SM501)		+= sm501.o
 obj-$(CONFIG_MFD_ASIC3)		+= asic3.o
 
+obj-$(CONFIG_HTC_EGPIO)		+= htc-egpio.o
+
 obj-$(CONFIG_MCP)		+= mcp-core.o
 obj-$(CONFIG_MCP_SA11X0)	+= mcp-sa11x0.o
 obj-$(CONFIG_MCP_UCB1200)	+= ucb1x00-core.o