On Mon, 9 Apr 2012, Simon Wood wrote:

This patch adds supports for controlling the LED 'tachometer' on
the G27 wheel, via the LED subsystem.

The 5 LEDs are arranged from right (1=grn, 2=grn, 3=yel, 4=yel, 5=red)
and 'mirrored' to the left (10 LEDs in total).

Signed-off-by: Simon Wood <redacted>
---
 drivers/hid/hid-lg4ff.c |  149 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 148 insertions(+), 1 deletions(-)

This patch introduces a clear dependency of hid-lg4ff driver on 
CONFIG_LEDS_CLASS, but the code doesn't reflect it.

So either you have to put #ifdef into source to compile the leds part out 
if leds subsystem is not enabled, or you have to introduce Kconfig rule to 
cover this.

-- 
Jiri Kosina
SUSE Labs