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Commit df76de09 authored by Michael Krufky's avatar Michael Krufky Committed by Mauro Carvalho Chehab
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V4L/DVB (8598): au8522: clean up function au8522_set_if 



re-write this function to make it simpler

Signed-off-by: default avatarMichael Krufky <mkrufky@linuxtv.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
parent 8e8bd229

drivers/media/dvb/frontends/au8522.c

+19 −46
Original line number Diff line number Diff line
@@ -304,67 +304,40 @@ static int au8522_mse2snr_lookup(struct mse2snr_tab *tab, int sz, int mse, 
	return ret;

}



/* 3.25 MHz IF Frequency table */

static struct {

	u16 reg;

	u16 data;

} if_3_25_mhz_tab[] = {

	{ 0x80b5, 0x00 },

	{ 0x80b6, 0x3d },

	{ 0x80b7, 0xa0 },

};



/* 4.00 MHz IF Frequency table */

static struct {

	u16 reg;

	u16 data;

} if_4_mhz_tab[] = {

	{ 0x80b5, 0x00 },

	{ 0x80b6, 0x4b },

	{ 0x80b7, 0xd9 },

};



/* 6.00 MHz IF Frequency table */

static struct {

	u16 reg;

	u16 data;

} if_6_mhz_tab[] = {

	{ 0x80b5, 0xfb },

	{ 0x80b6, 0x8e },

	{ 0x80b7, 0x39 },

};



static int au8522_set_if(struct dvb_frontend *fe, enum au8522_if_freq if_freq)

{

	struct au8522_state *state = fe->demodulator_priv;

	int i;

	u8 r0b5, r0b6, r0b7;

	char *ifmhz;



	switch (if_freq) {

	case AU8522_IF_3_25MHZ:

		dprintk("%s() 3.25 MHz\n", __func__);

		for (i = 0; i < ARRAY_SIZE(if_3_25_mhz_tab); i++)

			au8522_writereg(state,

					if_3_25_mhz_tab[i].reg,

					if_3_25_mhz_tab[i].data);

		ifmhz = "3.25";

		r0b5 = 0x00;

		r0b6 = 0x3d;

		r0b7 = 0xa0;

		break;

	case AU8522_IF_4MHZ:

		dprintk("%s() 4.00 MHz\n", __func__);

		for (i = 0; i < ARRAY_SIZE(if_4_mhz_tab); i++)

			au8522_writereg(state,

					if_4_mhz_tab[i].reg,

					if_4_mhz_tab[i].data);

		ifmhz = "4.00";

		r0b5 = 0x00;

		r0b6 = 0x4b;

		r0b7 = 0xd9;

		break;

	case AU8522_IF_6MHZ:

		dprintk("%s() 6.00 MHz\n", __func__);

		for (i = 0; i < ARRAY_SIZE(if_6_mhz_tab); i++)

			au8522_writereg(state,

					if_6_mhz_tab[i].reg,

					if_6_mhz_tab[i].data);

		ifmhz = "6.00";

		r0b5 = 0xfb;

		r0b6 = 0x8e;

		r0b7 = 0x39;

		break;

	default:

		dprintk("%s() IF Frequency not supported\n", __func__);

		return -EINVAL;

	}

	dprintk("%s() %s MHz\n", __func__, ifmhz);

	au8522_writereg(state, 0x80b5, r0b5);

	au8522_writereg(state, 0x80b6, r0b6);

	au8522_writereg(state, 0x80b7, r0b7);



	return 0;

}