diff options
Diffstat (limited to 'drivers/media/tuners/fc2580.c')
| -rw-r--r-- | drivers/media/tuners/fc2580.c | 61 |
1 files changed, 35 insertions, 26 deletions
diff --git a/drivers/media/tuners/fc2580.c b/drivers/media/tuners/fc2580.c index aff39ae457a..81f38aae9c6 100644 --- a/drivers/media/tuners/fc2580.c +++ b/drivers/media/tuners/fc2580.c @@ -35,8 +35,6 @@ * Currently it blind writes bunch of static registers from the * fc2580_freq_regs_lut[] when fc2580_set_params() is called. Add some * logic to reduce unneeded register writes. - * There is also don't-care registers, initialized with value 0xff, and those - * are also written to the chip currently (yes, not wise). */ /* write multiple registers */ @@ -111,6 +109,17 @@ static int fc2580_rd_reg(struct fc2580_priv *priv, u8 reg, u8 *val) return fc2580_rd_regs(priv, reg, val, 1); } +/* write single register conditionally only when value differs from 0xff + * XXX: This is special routine meant only for writing fc2580_freq_regs_lut[] + * values. Do not use for the other purposes. */ +static int fc2580_wr_reg_ff(struct fc2580_priv *priv, u8 reg, u8 val) +{ + if (val == 0xff) + return 0; + else + return fc2580_wr_regs(priv, reg, &val, 1); +} + static int fc2580_set_params(struct dvb_frontend *fe) { struct fc2580_priv *priv = fe->tuner_priv; @@ -213,99 +222,99 @@ static int fc2580_set_params(struct dvb_frontend *fe) if (i == ARRAY_SIZE(fc2580_freq_regs_lut)) goto err; - ret = fc2580_wr_reg(priv, 0x25, fc2580_freq_regs_lut[i].r25_val); + ret = fc2580_wr_reg_ff(priv, 0x25, fc2580_freq_regs_lut[i].r25_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x27, fc2580_freq_regs_lut[i].r27_val); + ret = fc2580_wr_reg_ff(priv, 0x27, fc2580_freq_regs_lut[i].r27_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x28, fc2580_freq_regs_lut[i].r28_val); + ret = fc2580_wr_reg_ff(priv, 0x28, fc2580_freq_regs_lut[i].r28_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x29, fc2580_freq_regs_lut[i].r29_val); + ret = fc2580_wr_reg_ff(priv, 0x29, fc2580_freq_regs_lut[i].r29_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x2b, fc2580_freq_regs_lut[i].r2b_val); + ret = fc2580_wr_reg_ff(priv, 0x2b, fc2580_freq_regs_lut[i].r2b_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x2c, fc2580_freq_regs_lut[i].r2c_val); + ret = fc2580_wr_reg_ff(priv, 0x2c, fc2580_freq_regs_lut[i].r2c_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x2d, fc2580_freq_regs_lut[i].r2d_val); + ret = fc2580_wr_reg_ff(priv, 0x2d, fc2580_freq_regs_lut[i].r2d_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x30, fc2580_freq_regs_lut[i].r30_val); + ret = fc2580_wr_reg_ff(priv, 0x30, fc2580_freq_regs_lut[i].r30_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x44, fc2580_freq_regs_lut[i].r44_val); + ret = fc2580_wr_reg_ff(priv, 0x44, fc2580_freq_regs_lut[i].r44_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x50, fc2580_freq_regs_lut[i].r50_val); + ret = fc2580_wr_reg_ff(priv, 0x50, fc2580_freq_regs_lut[i].r50_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x53, fc2580_freq_regs_lut[i].r53_val); + ret = fc2580_wr_reg_ff(priv, 0x53, fc2580_freq_regs_lut[i].r53_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x5f, fc2580_freq_regs_lut[i].r5f_val); + ret = fc2580_wr_reg_ff(priv, 0x5f, fc2580_freq_regs_lut[i].r5f_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x61, fc2580_freq_regs_lut[i].r61_val); + ret = fc2580_wr_reg_ff(priv, 0x61, fc2580_freq_regs_lut[i].r61_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x62, fc2580_freq_regs_lut[i].r62_val); + ret = fc2580_wr_reg_ff(priv, 0x62, fc2580_freq_regs_lut[i].r62_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x63, fc2580_freq_regs_lut[i].r63_val); + ret = fc2580_wr_reg_ff(priv, 0x63, fc2580_freq_regs_lut[i].r63_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x67, fc2580_freq_regs_lut[i].r67_val); + ret = fc2580_wr_reg_ff(priv, 0x67, fc2580_freq_regs_lut[i].r67_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x68, fc2580_freq_regs_lut[i].r68_val); + ret = fc2580_wr_reg_ff(priv, 0x68, fc2580_freq_regs_lut[i].r68_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x69, fc2580_freq_regs_lut[i].r69_val); + ret = fc2580_wr_reg_ff(priv, 0x69, fc2580_freq_regs_lut[i].r69_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x6a, fc2580_freq_regs_lut[i].r6a_val); + ret = fc2580_wr_reg_ff(priv, 0x6a, fc2580_freq_regs_lut[i].r6a_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x6b, fc2580_freq_regs_lut[i].r6b_val); + ret = fc2580_wr_reg_ff(priv, 0x6b, fc2580_freq_regs_lut[i].r6b_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x6c, fc2580_freq_regs_lut[i].r6c_val); + ret = fc2580_wr_reg_ff(priv, 0x6c, fc2580_freq_regs_lut[i].r6c_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x6d, fc2580_freq_regs_lut[i].r6d_val); + ret = fc2580_wr_reg_ff(priv, 0x6d, fc2580_freq_regs_lut[i].r6d_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x6e, fc2580_freq_regs_lut[i].r6e_val); + ret = fc2580_wr_reg_ff(priv, 0x6e, fc2580_freq_regs_lut[i].r6e_val); if (ret < 0) goto err; - ret = fc2580_wr_reg(priv, 0x6f, fc2580_freq_regs_lut[i].r6f_val); + ret = fc2580_wr_reg_ff(priv, 0x6f, fc2580_freq_regs_lut[i].r6f_val); if (ret < 0) goto err; |