diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/tuners/r820t.c | 27 |
1 files changed, 10 insertions, 17 deletions
diff --git a/drivers/media/tuners/r820t.c b/drivers/media/tuners/r820t.c index b679a3f1fb7a..f5a5fb03dfd5 100644 --- a/drivers/media/tuners/r820t.c +++ b/drivers/media/tuners/r820t.c @@ -36,7 +36,6 @@ #include <linux/mutex.h> #include <linux/slab.h> #include <linux/bitrev.h> -#include <asm/div64.h> #include "tuner-i2c.h" #include "r820t.h" @@ -540,7 +539,7 @@ static int r820t_set_mux(struct r820t_priv *priv, u32 freq) static int r820t_set_pll(struct r820t_priv *priv, enum v4l2_tuner_type type, u32 freq) { - u64 tmp64, vco_freq; + u32 vco_freq; int rc, i; unsigned sleep_time = 10000; u32 vco_fra; /* VCO contribution by SDM (kHz) */ @@ -576,9 +575,6 @@ static int r820t_set_pll(struct r820t_priv *priv, enum v4l2_tuner_type type, } } - tuner_dbg("set r820t pll for frequency %d kHz = %d%s\n", - freq, pll_ref, refdiv2 ? " / 2" : ""); - rc = r820t_write_reg_mask(priv, 0x10, refdiv2, 0x10); if (rc < 0) return rc; @@ -622,15 +618,9 @@ static int r820t_set_pll(struct r820t_priv *priv, enum v4l2_tuner_type type, if (rc < 0) return rc; - vco_freq = (u64)(freq * (u64)mix_div); - - tmp64 = vco_freq; - do_div(tmp64, 2 * pll_ref); - nint = (u8)tmp64; - - tmp64 = vco_freq - ((u64)2) * pll_ref * nint; - do_div(tmp64, 1000); - vco_fra = (u16)(tmp64); + vco_freq = freq * mix_div; + nint = vco_freq / (2 * pll_ref); + vco_fra = vco_freq - 2 * pll_ref * nint; /* boundary spur prevention */ if (vco_fra < pll_ref / 64) { @@ -677,10 +667,13 @@ static int r820t_set_pll(struct r820t_priv *priv, enum v4l2_tuner_type type, n_sdm = n_sdm << 1; } - rc = r820t_write_reg_mask(priv, 0x16, sdm >> 8, 0x08); + tuner_dbg("freq %d kHz, pll ref %d%s, sdm=0x%04x\n", + freq, pll_ref, refdiv2 ? " / 2" : "", sdm); + + rc = r820t_write_reg(priv, 0x16, sdm >> 8); if (rc < 0) return rc; - rc = r820t_write_reg_mask(priv, 0x15, sdm & 0xff, 0x08); + rc = r820t_write_reg(priv, 0x15, sdm & 0xff); if (rc < 0) return rc; @@ -1068,7 +1061,7 @@ static int r820t_set_tv_standard(struct r820t_priv *priv, if (rc < 0) return rc; - rc = r820t_set_pll(priv, type, filt_cal_lo); + rc = r820t_set_pll(priv, type, filt_cal_lo * 1000); if (rc < 0 || !priv->has_lock) return rc; |