pmic: tps65218: add useful functions and defines

Add the following functions:
tps65218_reg_read() for accessing redisters
tps65218_toggle_fseal() for toggling the fseal bit
tps65218_lock_fsea() for locking the fseal bit to 1

Add the following defines:
All status register bits

Cc: Tom Rini <trini@konsulko.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/include/power/tps65218.h b/include/power/tps65218.h
index 63fc7b3..4d68faa 100644
--- a/include/power/tps65218.h
+++ b/include/power/tps65218.h
@@ -8,6 +8,8 @@
 #ifndef __POWER_TPS65218_H__
 #define __POWER_TPS65218_H__
 
+#include <linux/bitops.h>
+
 /* I2C chip address */
 #define TPS65218_CHIP_PM			0x24
 
@@ -60,8 +62,18 @@
 #define TPS65218_DCDC_VOLT_SEL_1260MV		0x29
 #define TPS65218_DCDC_VOLT_SEL_1330MV		0x30
 
+#define TPS65218_CC_STAT	(BIT(0) | BIT(1))
+#define TPS65218_STATE		(BIT(2) | BIT(3))
+#define TPS65218_PB_STATE	BIT(4)
+#define TPS65218_AC_STATE	BIT(5)
+#define TPS65218_EE		BIT(6)
+#define TPS65218_FSEAL		BIT(7)
+
+int tps65218_reg_read(uchar dest_reg, uchar *dest_val);
 int tps65218_reg_write(uchar prot_level, uchar dest_reg, uchar dest_val,
 		       uchar mask);
 int tps65218_voltage_update(uchar dc_cntrl_reg, uchar volt_sel);
+int tps65218_toggle_fseal(void);
+int tps65218_lock_fseal(void);
 int power_tps65218_init(unsigned char bus);
 #endif	/* __POWER_TPS65218_H__ */