leds: add led driver for Bachmann's ot200

Add support for leds on Bachmann's ot200 visualisation device.  The
device has three leds on the back panel (led_err, led_init and led_run)
and can handle up to seven leds on the front panel.

The driver was written by Linutronix on behalf of Bachmann electronic
GmbH.  It incorporates feedback from Lars-Peter Clausen

[akpm@linux-foundation.org: add dependency on HAS_IOMEM]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index c957c344233f..9ca28fced2b9 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -403,6 +403,13 @@ config LEDS_MAX8997
           This option enables support for on-chip LED drivers on
           MAXIM MAX8997 PMIC.
 
+config LEDS_OT200
+        tristate "LED support for the Bachmann OT200"
+        depends on LEDS_CLASS && HAS_IOMEM
+        help
+          This option enables support for the LEDs on the Bachmann OT200.
+          Say Y to enable LEDs on the Bachmann OT200.
+
 config LEDS_TRIGGERS
         bool "LED Trigger support"
         depends on LEDS_CLASS