leds: add driver for TCA6507 LED controller

TI's TCA6507 is the LED driver in the GTA04 Openmoko motherboard.  The
driver provides full support for brightness levels and hardware blinking.

This driver can drive each of 7 outputs as an LED or a GPIO output,
and provides hardware-assist blinking.

[akpm@linux-foundation.org: fix __mod_i2c_device_table alias]
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: NeilBrown <neilb@suse.de>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/leds/Kconfig

@@ -388,6 +388,14 @@ config LEDS_RENESAS_TPU
 	  pin function. The latter to support brightness control.
 	  Brightness control is supported but hardware blinking is not.
 
+config LEDS_TCA6507
+	tristate "LED Support for TCA6507 I2C chip"
+	depends on LEDS_CLASS && I2C
+	help
+	  This option enables support for LEDs connected to TC6507
+	  LED driver chips accessed via the I2C bus.
+	  Driver support brightness control and hardware-assisted blinking.
+
 config LEDS_TRIGGERS
 	bool "LED Trigger support"
 	depends on LEDS_CLASS

drivers/leds/Makefile

@@ -25,6 +25,7 @@ obj-$(CONFIG_LEDS_GPIO)			+= leds-gpio.o
 obj-$(CONFIG_LEDS_LP3944)		+= leds-lp3944.o
 obj-$(CONFIG_LEDS_LP5521)		+= leds-lp5521.o
 obj-$(CONFIG_LEDS_LP5523)		+= leds-lp5523.o
+obj-$(CONFIG_LEDS_TCA6507)		+= leds-tca6507.o
 obj-$(CONFIG_LEDS_CLEVO_MAIL)		+= leds-clevo-mail.o
 obj-$(CONFIG_LEDS_HP6XX)		+= leds-hp6xx.o
 obj-$(CONFIG_LEDS_FSG)			+= leds-fsg.o