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[media] af9033: feed clock to RF tuner 

IT9135 RF tuner clock is coming from demodulator. We need enable it
early in demod init, before any tuner I/O. Currently it is enabled
by tuner driver itself, but it is too late and performance will be
reduced as some registers are not updated correctly. Clock is
disabled automatically when demod is put onto sleep.

Cc: <stable@vger.kernel.org> # v3.15+
Cc: Bimow Chen <Bimow.Chen@ite.com.tw>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Antti Palosaari 2014-08-09 01:03:14 -03:00 committed by Mauro Carvalho Chehab
parent 01b461bbe7
commit 9dc0f3fe3f
1 changed files with 13 additions and 0 deletions
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13
drivers/media/dvb-frontends/af9033.c
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@ -314,6 +314,19 @@ static int af9033_init(struct dvb_frontend *fe)
goto err;
}
/* feed clock to RF tuner */
switch (state->cfg.tuner) {
case AF9033_TUNER_IT9135_38:
case AF9033_TUNER_IT9135_51:
case AF9033_TUNER_IT9135_52:
case AF9033_TUNER_IT9135_60:
case AF9033_TUNER_IT9135_61:
case AF9033_TUNER_IT9135_62:
ret = af9033_wr_reg(state, 0x80fba8, 0x00);
if (ret < 0)
goto err;
}
/* settings for TS interface */
if (state->cfg.ts_mode == AF9033_TS_MODE_USB) {
ret = af9033_wr_reg_mask(state, 0x80f9a5, 0x00, 0x01);