diff options
| -rw-r--r-- | drivers/media/dvb-frontends/a8293.c | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/drivers/media/dvb-frontends/a8293.c b/drivers/media/dvb-frontends/a8293.c index d99ea4d..ef2b47c 100644 --- a/drivers/media/dvb-frontends/a8293.c +++ b/drivers/media/dvb-frontends/a8293.c @@ -31,30 +31,42 @@ static int a8293_set_voltage(struct dvb_frontend *fe, struct a8293_dev *dev = fe->sec_priv; struct i2c_client *client = dev->client; int ret; + u8 reg0, reg1; dev_dbg(&client->dev, "fe_sec_voltage=%d\n", fe_sec_voltage); switch (fe_sec_voltage) { case SEC_VOLTAGE_OFF: /* ENB=0 */ - dev->reg[0] = 0x10; + reg0 = 0x10; break; case SEC_VOLTAGE_13: /* VSEL0=1, VSEL1=0, VSEL2=0, VSEL3=0, ENB=1*/ - dev->reg[0] = 0x31; + reg0 = 0x31; break; case SEC_VOLTAGE_18: /* VSEL0=0, VSEL1=0, VSEL2=0, VSEL3=1, ENB=1*/ - dev->reg[0] = 0x38; + reg0 = 0x38; break; default: ret = -EINVAL; goto err; } + if (reg0 != dev->reg[0]) { + ret = i2c_master_send(client, ®0, 1); + if (ret < 0) + goto err; + dev->reg[0] = reg0; + } - ret = i2c_master_send(client, &dev->reg[0], 1); - if (ret < 0) - goto err; + /* TMODE=0, TGATE=1 */ + reg1 = 0x82; + if (reg1 != dev->reg[1]) { + ret = i2c_master_send(client, ®1, 1); + if (ret < 0) + goto err; + dev->reg[1] = reg1; + } usleep_range(1500, 50000); return 0; @@ -85,18 +97,6 @@ static int a8293_probe(struct i2c_client *client, if (ret < 0) goto err_kfree; - /* ENB=0 */ - dev->reg[0] = 0x10; - ret = i2c_master_send(client, &dev->reg[0], 1); - if (ret < 0) - goto err_kfree; - - /* TMODE=0, TGATE=1 */ - dev->reg[1] = 0x82; - ret = i2c_master_send(client, &dev->reg[1], 1); - if (ret < 0) - goto err_kfree; - /* override frontend ops */ fe->ops.set_voltage = a8293_set_voltage; fe->sec_priv = dev; |