diff options
| author | Michael Krufky <mkrufky@linuxtv.org> | 2008-04-22 17:46:06 (GMT) |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-04-24 17:07:52 (GMT) |
| commit | 5555309c9adcf9bb7f6b449ef45b09d5c26ef4ae (patch) | |
| tree | 43cde0dd327dffe23bcbaf9612e64299566f7485 /drivers/media/dvb | |
| parent | ab8b870e430d3e2cfb299f81e0ae0aef7fe5bfda (diff) | |
| download | linux-5555309c9adcf9bb7f6b449ef45b09d5c26ef4ae.tar.xz | |
V4L/DVB (7383): tda18271: add attach-time parameter to limit i2c transfer size
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>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/dvb')
| -rw-r--r-- | drivers/media/dvb/frontends/tda18271-common.c | 7 | ||||
| -rw-r--r-- | drivers/media/dvb/frontends/tda18271-fe.c | 3 | ||||
| -rw-r--r-- | drivers/media/dvb/frontends/tda18271-priv.h | 1 | ||||
| -rw-r--r-- | drivers/media/dvb/frontends/tda18271.h | 3 |
4 files changed, 13 insertions, 1 deletions
diff --git a/drivers/media/dvb/frontends/tda18271-common.c b/drivers/media/dvb/frontends/tda18271-common.c index 3949646..bbfc22a 100644 --- a/drivers/media/dvb/frontends/tda18271-common.c +++ b/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/drivers/media/dvb/frontends/tda18271-fe.c b/drivers/media/dvb/frontends/tda18271-fe.c index b5d69a8..bb0a653 100644 --- a/drivers/media/dvb/frontends/tda18271-fe.c +++ b/drivers/media/dvb/frontends/tda18271-fe.c @@ -1081,6 +1081,9 @@ 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/drivers/media/dvb/frontends/tda18271-priv.h b/drivers/media/dvb/frontends/tda18271-priv.h index 840b180..ecb588e 100644 --- a/drivers/media/dvb/frontends/tda18271-priv.h +++ b/drivers/media/dvb/frontends/tda18271-priv.h @@ -110,6 +110,7 @@ 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/drivers/media/dvb/frontends/tda18271.h b/drivers/media/dvb/frontends/tda18271.h index 24b0e35..e79441e 100644 --- a/drivers/media/dvb/frontends/tda18271.h +++ b/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)) |