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| author | Michael Krufky <mkrufky@linuxtv.org> | 2008-03-16 00:13:09 -0400 |
|---|---|---|
| committer | Michael Krufky <mkrufky@linuxtv.org> | 2008-03-16 00:13:09 -0400 |
| commit | eb7c9b051872740cb59da357e90b5dae2d67ac12 (patch) | |
| tree | b605917607b73ea856b457a62c3d9f2ad770c3d3 /linux/drivers/media/dvb/frontends | |
| parent | cafc731a90a72a074c05cf2d7e4a67f3fa596b76 (diff) | |
| download | mediapointer-dvb-s2-eb7c9b051872740cb59da357e90b5dae2d67ac12.tar.gz mediapointer-dvb-s2-eb7c9b051872740cb59da357e90b5dae2d67ac12.tar.bz2 | |
tda18271: add attach-time parameter to limit i2c transfer size
From: Michael Krufky <mkrufky@linuxtv.org>
Add attach-time parameter, "small_i2c" to limit i2c transfer size to write
at most 16 registers at a time during initialization.
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Diffstat (limited to 'linux/drivers/media/dvb/frontends')
4 files changed, 13 insertions, 1 deletions
diff --git a/linux/drivers/media/dvb/frontends/tda18271-common.c b/linux/drivers/media/dvb/frontends/tda18271-common.c index d0596b999..e5e8a7497 100644 --- a/linux/drivers/media/dvb/frontends/tda18271-common.c +++ b/linux/drivers/media/dvb/frontends/tda18271-common.c @@ -311,7 +311,12 @@ int tda18271_init_regs(struct dvb_frontend *fe) regs[R_EB22] = 0x48; regs[R_EB23] = 0xb0; - tda18271_write_regs(fe, 0x00, TDA18271_NUM_REGS); + if (priv->small_i2c) { + tda18271_write_regs(fe, 0x00, 0x10); + tda18271_write_regs(fe, 0x10, 0x10); + tda18271_write_regs(fe, 0x20, 0x07); + } else + tda18271_write_regs(fe, 0x00, TDA18271_NUM_REGS); /* setup agc1 gain */ regs[R_EB17] = 0x00; diff --git a/linux/drivers/media/dvb/frontends/tda18271-fe.c b/linux/drivers/media/dvb/frontends/tda18271-fe.c index dfa7456de..201207fd6 100644 --- a/linux/drivers/media/dvb/frontends/tda18271-fe.c +++ b/linux/drivers/media/dvb/frontends/tda18271-fe.c @@ -1105,6 +1105,9 @@ struct dvb_frontend *tda18271_attach(struct dvb_frontend *fe, u8 addr, fe->tuner_priv = priv; + if (cfg) + priv->small_i2c = cfg->small_i2c; + if (tda18271_get_id(fe) < 0) goto fail; diff --git a/linux/drivers/media/dvb/frontends/tda18271-priv.h b/linux/drivers/media/dvb/frontends/tda18271-priv.h index 5f8af8140..85eb24af7 100644 --- a/linux/drivers/media/dvb/frontends/tda18271-priv.h +++ b/linux/drivers/media/dvb/frontends/tda18271-priv.h @@ -115,6 +115,7 @@ struct tda18271_priv { unsigned int tm_rfcal; unsigned int cal_initialized:1; + unsigned int small_i2c:1; struct tda18271_map_layout *maps; struct tda18271_std_map std; diff --git a/linux/drivers/media/dvb/frontends/tda18271.h b/linux/drivers/media/dvb/frontends/tda18271.h index 24b0e35a2..e79441e22 100644 --- a/linux/drivers/media/dvb/frontends/tda18271.h +++ b/linux/drivers/media/dvb/frontends/tda18271.h @@ -58,6 +58,9 @@ struct tda18271_config { /* use i2c gate provided by analog or digital demod */ enum tda18271_i2c_gate gate; + + /* some i2c providers cant write all 39 registers at once */ + unsigned int small_i2c:1; }; #if defined(CONFIG_DVB_TDA18271) || (defined(CONFIG_DVB_TDA18271_MODULE) && defined(MODULE)) |