misc: isa1200: Add support for clock enable

ISA1200 uses clock to generate pwm for vibration. Add
a callback api to control the clock.

CRs-fixed: 357656
Change-Id: Iac1d0cdb3ac950b7bbc2afbe3a92b0e0292e3811
Signed-off-by: Mohan Pallaka <mpallaka@codeaurora.org>
diff --git a/include/linux/i2c/isa1200.h b/include/linux/i2c/isa1200.h
index 4c36d59..9dab3eb 100644
--- a/include/linux/i2c/isa1200.h
+++ b/include/linux/i2c/isa1200.h
@@ -3,7 +3,7 @@
  *
  *  Copyright (C) 2009 Samsung Electronics
  *  Kyungmin Park <kyungmin.park@samsung.com>
- *  Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
+ *  Copyright (c) 2010-2012, Code Aurora Forum. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -55,6 +55,7 @@
 	u8 num_regulators;
 	int (*power_on)(int on);
 	int (*dev_setup)(bool on);
+	int (*clk_enable)(bool on);
 };
 
 #endif /* __LINUX_ISA1200_H */