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[media] r820t: add support for diplexer

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This is part of the original driver, and adding it doesn't hurt,
so add it, to better sync the code.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Tested-by: Antti Palosaari <crope@iki.fi>
This commit is contained in:
Mauro Carvalho Chehab 2013-04-10 08:51:45 -03:00
parent 6b8c230876
commit 84ddc33c20
2 changed files with 13 additions and 1 deletions
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12
drivers/media/tuners/r820t.c
View file

@ -101,6 +101,7 @@ struct r820t_freq_range {
};
#define VCO_POWER_REF 0x02
#define DIP_FREQ 32000000
/*
* Static constants
@ -751,6 +752,17 @@ static int r820t_sysfreq_sel(struct r820t_priv *priv, u32 freq,
break;
}
if (priv->cfg->use_diplexer &&
((priv->cfg->rafael_chip == CHIP_R820T) ||
(priv->cfg->rafael_chip == CHIP_R828S) ||
(priv->cfg->rafael_chip == CHIP_R820C))) {
if (freq > DIP_FREQ)
air_cable1_in = 0x00;
else
air_cable1_in = 0x60;
cable2_in = 0x00;
}
rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0xc7);
if (rc < 0)
return rc;

2
drivers/media/tuners/r820t.h
View file

@ -32,10 +32,10 @@ enum r820t_chip {
struct r820t_config {
u8 i2c_addr; /* 0x34 */
u32 xtal;
enum r820t_chip rafael_chip;
unsigned max_i2c_msg_len;
bool use_diplexer;
};
#if IS_ENABLED(CONFIG_MEDIA_TUNER_R820T)