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authorAntti Palosaari <crope@iki.fi>2016-06-29 20:39:47 -0300
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2016-07-08 16:58:05 -0300
commitf5d9b88db7222bf5a8d0e5e7820873e3977d4ee3 (patch)
treebbcdd7b57733a6ff39bc2bae1bd8d61672ac0023 /drivers/media/dvb-frontends/m88ds3103.c
parent334ef18e879980e92f8add103369b763766c4d9f (diff)
[media] m88ds3103: use Hz instead of kHz on calculations
There was some calculations where was kHz used in order to keep calculation withing 32-bit. Convert all to Hz and use 64-bit division helpers where needed. Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/dvb-frontends/m88ds3103.c')
-rw-r--r--drivers/media/dvb-frontends/m88ds3103.c50
1 files changed, 25 insertions, 25 deletions
diff --git a/drivers/media/dvb-frontends/m88ds3103.c b/drivers/media/dvb-frontends/m88ds3103.c
index fae92515cf51..5158bf37c76b 100644
--- a/drivers/media/dvb-frontends/m88ds3103.c
+++ b/drivers/media/dvb-frontends/m88ds3103.c
@@ -307,7 +307,7 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe)
u8 u8tmp, u8tmp1 = 0, u8tmp2 = 0; /* silence compiler warning */
u8 buf[3];
u16 u16tmp;
- u32 tuner_frequency, target_mclk;
+ u32 tuner_frequency_khz, target_mclk;
s32 s32tmp;
dev_dbg(&client->dev,
@@ -344,7 +344,7 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe)
}
if (fe->ops.tuner_ops.get_frequency) {
- ret = fe->ops.tuner_ops.get_frequency(fe, &tuner_frequency);
+ ret = fe->ops.tuner_ops.get_frequency(fe, &tuner_frequency_khz);
if (ret)
goto err;
} else {
@@ -353,20 +353,20 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe)
* actual frequency used. Carrier offset calculation is not
* valid.
*/
- tuner_frequency = c->frequency;
+ tuner_frequency_khz = c->frequency;
}
/* select M88RS6000 demod main mclk and ts mclk from tuner die. */
if (dev->chip_id == M88RS6000_CHIP_ID) {
if (c->symbol_rate > 45010000)
- dev->mclk_khz = 110250;
+ dev->mclk = 110250000;
else
- dev->mclk_khz = 96000;
+ dev->mclk = 96000000;
if (c->delivery_system == SYS_DVBS)
- target_mclk = 96000;
+ target_mclk = 96000000;
else
- target_mclk = 144000;
+ target_mclk = 144000000;
/* Enable demod clock path */
ret = regmap_write(dev->regmap, 0x06, 0x00);
@@ -375,7 +375,7 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe)
usleep_range(10000, 20000);
} else {
/* set M88DS3103 mclk and ts mclk. */
- dev->mclk_khz = 96000;
+ dev->mclk = 96000000;
switch (dev->cfg->ts_mode) {
case M88DS3103_TS_SERIAL:
@@ -385,14 +385,14 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe)
case M88DS3103_TS_PARALLEL:
case M88DS3103_TS_CI:
if (c->delivery_system == SYS_DVBS)
- target_mclk = 96000;
+ target_mclk = 96000000;
else {
if (c->symbol_rate < 18000000)
- target_mclk = 96000;
+ target_mclk = 96000000;
else if (c->symbol_rate < 28000000)
- target_mclk = 144000;
+ target_mclk = 144000000;
else
- target_mclk = 192000;
+ target_mclk = 192000000;
}
break;
default:
@@ -402,15 +402,15 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe)
}
switch (target_mclk) {
- case 96000:
+ case 96000000:
u8tmp1 = 0x02; /* 0b10 */
u8tmp2 = 0x01; /* 0b01 */
break;
- case 144000:
+ case 144000000:
u8tmp1 = 0x00; /* 0b00 */
u8tmp2 = 0x01; /* 0b01 */
break;
- case 192000:
+ case 192000000:
u8tmp1 = 0x03; /* 0b11 */
u8tmp2 = 0x00; /* 0b00 */
break;
@@ -464,8 +464,8 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe)
}
if (dev->chip_id == M88RS6000_CHIP_ID) {
- if ((c->delivery_system == SYS_DVBS2)
- && ((c->symbol_rate / 1000) <= 5000)) {
+ if (c->delivery_system == SYS_DVBS2 &&
+ c->symbol_rate <= 5000000) {
ret = regmap_write(dev->regmap, 0xc0, 0x04);
if (ret)
goto err;
@@ -532,7 +532,7 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe)
u8tmp2 = DIV_ROUND_UP(u16tmp, 2) - 1;
}
- dev_dbg(&client->dev, "target_mclk=%d ts_clk=%d ts_clk_divide_ratio=%u\n",
+ dev_dbg(&client->dev, "target_mclk=%u ts_clk=%u ts_clk_divide_ratio=%u\n",
target_mclk, dev->cfg->ts_clk, u16tmp);
/* u8tmp1[5:2] => fe[3:0], u8tmp1[1:0] => ea[7:6] */
@@ -569,7 +569,7 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe)
if (ret)
goto err;
- u16tmp = DIV_ROUND_CLOSEST((c->symbol_rate / 1000) << 15, dev->mclk_khz / 2);
+ u16tmp = DIV_ROUND_CLOSEST_ULL((u64)c->symbol_rate * 0x10000, dev->mclk);
buf[0] = (u16tmp >> 0) & 0xff;
buf[1] = (u16tmp >> 8) & 0xff;
ret = regmap_bulk_write(dev->regmap, 0x61, buf, 2);
@@ -589,10 +589,11 @@ static int m88ds3103_set_frontend(struct dvb_frontend *fe)
goto err;
dev_dbg(&client->dev, "carrier offset=%d\n",
- (tuner_frequency - c->frequency));
+ (tuner_frequency_khz - c->frequency));
- s32tmp = 0x10000 * (tuner_frequency - c->frequency);
- s32tmp = DIV_ROUND_CLOSEST(s32tmp, dev->mclk_khz);
+ /* Use 32-bit calc as there is no s64 version of DIV_ROUND_CLOSEST() */
+ s32tmp = 0x10000 * (tuner_frequency_khz - c->frequency);
+ s32tmp = DIV_ROUND_CLOSEST(s32tmp, dev->mclk / 1000);
buf[0] = (s32tmp >> 0) & 0xff;
buf[1] = (s32tmp >> 8) & 0xff;
ret = regmap_bulk_write(dev->regmap, 0x5e, buf, 2);
@@ -937,8 +938,7 @@ static int m88ds3103_get_frontend(struct dvb_frontend *fe,
if (ret)
goto err;
- c->symbol_rate = 1ull * ((buf[1] << 8) | (buf[0] << 0)) *
- dev->mclk_khz * 1000 / 0x10000;
+ c->symbol_rate = DIV_ROUND_CLOSEST_ULL((u64)(buf[1] << 8 | buf[0] << 0) * dev->mclk, 0x10000);
return 0;
err:
@@ -1381,7 +1381,7 @@ static int m88ds3103_probe(struct i2c_client *client,
dev->config.clock = pdata->clk;
dev->config.i2c_wr_max = pdata->i2c_wr_max;
dev->config.ts_mode = pdata->ts_mode;
- dev->config.ts_clk = pdata->ts_clk;
+ dev->config.ts_clk = pdata->ts_clk * 1000;
dev->config.ts_clk_pol = pdata->ts_clk_pol;
dev->config.spec_inv = pdata->spec_inv;
dev->config.agc_inv = pdata->agc_inv;

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