mfd: twl-core: Add twl_i2c_read/write_u16

Add a simple twl_i2c_read/write_u16 wrapper over
the twl_i2c_read/write, which is similar to the
twl_i2c_read/write_u8 wrapper.
Signed-off-by: NSebastian Reichel <sre@debian.org>
Acked-by: NJonathan Cameron <jic23@kernel.org>
Tested-by: NMarek Belisko <marek@goldelico.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

include/linux/i2c/twl.h

@@ -195,6 +195,18 @@ static inline int twl_i2c_read_u8(u8 mod_no, u8 *val, u8 reg) {
 	return twl_i2c_read(mod_no, val, reg, 1);
 }
 
+static inline int twl_i2c_write_u16(u8 mod_no, u16 val, u8 reg) {
+	val = cpu_to_le16(val);
+	return twl_i2c_write(mod_no, (u8*) &val, reg, 2);
+}
+
+static inline int twl_i2c_read_u16(u8 mod_no, u16 *val, u8 reg) {
+	int ret;
+	ret = twl_i2c_read(mod_no, (u8*) val, reg, 2);
+	*val = le16_to_cpu(*val);
+	return ret;
+}
+
 int twl_get_type(void);
 int twl_get_version(void);
 int twl_get_hfclk_rate(void);