u16 signal = ((mt352_read_register(state, AGC_GAIN_1) << 8) & 0x0f) | (mt352_read_register(state, AGC_GAIN_0));
u16 signal = ((mt352_read_register(state, AGC_GAIN_1) & 0x0f) << 12) | (mt352_read_register(state, AGC_GAIN_0) << 4);
static int mt352_read_signal_strength(struct dvb_frontend* fe, u16* strength){	struct mt352_state* state = fe->demodulator_priv;	u16 signal = ((mt352_read_register(state, AGC_GAIN_1) << 8) & 0x0f) |		      (mt352_read_register(state, AGC_GAIN_0));	*strength = ~signal;	return 0;}