diff options
| author | Benjamin Larsson | 2015-01-13 00:23:25 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab | 2015-03-03 17:07:55 +0100 |
| commit | 3b786f13164596b2be44379442c34fbf561a78b6 (patch) | |
| tree | dabab340f791d1ce35e2840443fafeaef88c89a5 /drivers/staging/media/mn88473/mn88473.c | |
| parent | [media] media: adv7604: improve usage of gpiod API (diff) | |
| download | kernel-qcow2-linux-3b786f13164596b2be44379442c34fbf561a78b6.tar.gz kernel-qcow2-linux-3b786f13164596b2be44379442c34fbf561a78b6.tar.xz kernel-qcow2-linux-3b786f13164596b2be44379442c34fbf561a78b6.zip | |
[media] mn88473: calculate the IF register values
Add xtal as a configuration parameter so it can be used
in the IF register value calculation. If not set in the
configuration then use a default value.
Signed-off-by: Benjamin Larsson <benjamin@southpole.se>
Reviewed-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/staging/media/mn88473/mn88473.c')
| -rw-r--r-- | drivers/staging/media/mn88473/mn88473.c | 26 |
1 files changed, 11 insertions, 15 deletions
diff --git a/drivers/staging/media/mn88473/mn88473.c b/drivers/staging/media/mn88473/mn88473.c index a333744b76b9..fb0aa8d73711 100644 --- a/drivers/staging/media/mn88473/mn88473.c +++ b/drivers/staging/media/mn88473/mn88473.c @@ -30,6 +30,7 @@ static int mn88473_set_frontend(struct dvb_frontend *fe) struct dtv_frontend_properties *c = &fe->dtv_property_cache; int ret, i; u32 if_frequency; + u64 tmp; u8 delivery_system_val, if_val[3], bw_val[7]; dev_dbg(&client->dev, @@ -63,15 +64,12 @@ static int mn88473_set_frontend(struct dvb_frontend *fe) case SYS_DVBT2: if (c->bandwidth_hz <= 6000000) { /* IF 3570000 Hz, BW 6000000 Hz */ - memcpy(if_val, "\x24\x8e\x8a", 3); memcpy(bw_val, "\xe9\x55\x55\x1c\x29\x1c\x29", 7); } else if (c->bandwidth_hz <= 7000000) { /* IF 4570000 Hz, BW 7000000 Hz */ - memcpy(if_val, "\x2e\xcb\xfb", 3); memcpy(bw_val, "\xc8\x00\x00\x17\x0a\x17\x0a", 7); } else if (c->bandwidth_hz <= 8000000) { /* IF 4570000 Hz, BW 8000000 Hz */ - memcpy(if_val, "\x2e\xcb\xfb", 3); memcpy(bw_val, "\xaf\x00\x00\x11\xec\x11\xec", 7); } else { ret = -EINVAL; @@ -80,7 +78,6 @@ static int mn88473_set_frontend(struct dvb_frontend *fe) break; case SYS_DVBC_ANNEX_A: /* IF 5070000 Hz, BW 8000000 Hz */ - memcpy(if_val, "\x33\xea\xb3", 3); memcpy(bw_val, "\xaf\x00\x00\x11\xec\x11\xec", 7); break; default: @@ -105,17 +102,12 @@ static int mn88473_set_frontend(struct dvb_frontend *fe) if_frequency = 0; } - switch (if_frequency) { - case 3570000: - case 4570000: - case 5070000: - break; - default: - dev_err(&client->dev, "IF frequency %d not supported\n", - if_frequency); - ret = -EINVAL; - goto err; - } + /* Calculate IF registers ( (1<<24)*IF / Xtal ) */ + tmp = div_u64(if_frequency * (u64)(1<<24) + (dev->xtal / 2), + dev->xtal); + if_val[0] = ((tmp >> 16) & 0xff); + if_val[1] = ((tmp >> 8) & 0xff); + if_val[2] = ((tmp >> 0) & 0xff); ret = regmap_write(dev->regmap[2], 0x05, 0x00); ret = regmap_write(dev->regmap[2], 0xfb, 0x13); @@ -352,6 +344,10 @@ static int mn88473_probe(struct i2c_client *client, } dev->i2c_wr_max = config->i2c_wr_max; + if (!config->xtal) + dev->xtal = 25000000; + else + dev->xtal = config->xtal; dev->client[0] = client; dev->regmap[0] = regmap_init_i2c(dev->client[0], ®map_config); if (IS_ERR(dev->regmap[0])) { |