Calculate low-pass filter control word dynamically from given radio
channel bandwidth.
Signed-off-by: Antti Palosaari <cr...@iki.fi>
---
drivers/media/tuners/fc2580.c | 8 ++++----
drivers/media/tuners/fc2580_priv.h | 9 ++++-----
2 files changed, 8 insertions(+), 9 deletions(-)
diff --git a/drivers/media/tuners/fc2580.c b/drivers/media/tuners/fc2580.c
index 08838b4..30cee76 100644
--- a/drivers/media/tuners/fc2580.c
+++ b/drivers/media/tuners/fc2580.c
@@ -46,7 +46,7 @@ static int fc2580_set_params(struct dvb_frontend *fe)
int ret, i;
unsigned int uitmp, div_ref, div_ref_val, div_n, k, k_cw, div_out;
u64 f_vco;
- u8 u8tmp, synth_config;
+ u8 synth_config;
unsigned long timeout;
dev_dbg(&client->dev,
@@ -249,9 +249,9 @@ static int fc2580_set_params(struct dvb_frontend *fe)
if (ret)
goto err;
- u8tmp = div_u64((u64) dev->clk * fc2580_if_filter_lut[i].mul,
- 1000000000);
- ret = regmap_write(dev->regmap, 0x37, u8tmp);
+ uitmp = (unsigned int) 8058000 - (c->bandwidth_hz * 122 / 100 / 2);
+ uitmp = div64_u64((u64) dev->clk * uitmp, 1000000000000ULL);
+ ret = regmap_write(dev->regmap, 0x37, uitmp);
if (ret)
goto err;
diff --git a/drivers/media/tuners/fc2580_priv.h
b/drivers/media/tuners/fc2580_priv.h
index 60f8f6c..bd88b01 100644
--- a/drivers/media/tuners/fc2580_priv.h
+++ b/drivers/media/tuners/fc2580_priv.h
@@ -64,16 +64,15 @@ static const struct fc2580_pll fc2580_pll_lut[] = {
struct fc2580_if_filter {
u32 freq;
- u16 mul;
u8 r36_val;
u8 r39_val;
};
static const struct fc2580_if_filter fc2580_if_filter_lut[] = {
- { 6000000, 4400, 0x18, 0x00},
- { 7000000, 3910, 0x18, 0x80},
- { 8000000, 3300, 0x18, 0x80},
- {0xffffffff, 3300, 0x18, 0x80},
+ { 6000000, 0x18, 0x00},
+ { 7000000, 0x18, 0x80},
+ { 8000000, 0x18, 0x80},
+ {0xffffffff, 0x18, 0x80},
};
struct fc2580_freq_regs {
--
http://palosaari.fi/
--
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