* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "a8293.h"
};
static int a8293_set_voltage(struct dvb_frontend *fe,
- enum fe_sec_voltage fe_sec_voltage)
+ enum fe_sec_voltage fe_sec_voltage)
{
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;
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;
static struct i2c_driver a8293_driver = {
.driver = {
- .owner = THIS_MODULE,
.name = "a8293",
.suppress_bind_attrs = true,
},