V4L/DVB (5216): Zl10353: add i2c_gate_ctrl support

Implement I2C gate control for Megasky GL861 and SigmaTek AU6610 support.

Signed-off-by: Chris Pascoe <c.pascoe@itee.uq.edu.au>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 15 insertions, 2 deletions

diff --git a/drivers/media/dvb/frontends/zl10353.c b/drivers/media/dvb/frontends/zl10353.c
index 0d8241de89ee..50dac2054353 100644
--- a/drivers/media/dvb/frontends/zl10353.c
+++ b/drivers/media/dvb/frontends/zl10353.c
@@ -142,14 +142,16 @@ static int zl10353_set_parameters(struct dvb_frontend *fe,
         zl10353_single_write(fe, 0x66, 0xE9);
         zl10353_single_write(fe, 0x6C, 0xCD);
         zl10353_single_write(fe, 0x6D, 0x7E);
-        zl10353_single_write(fe, 0x62, 0x0A);
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 0);
 
         // if there is no attached secondary tuner, we call set_params to program
         // a potential tuner attached somewhere else
         if (state->config.no_tuner) {
                 if (fe->ops.tuner_ops.set_params) {
                         fe->ops.tuner_ops.set_params(fe, param);
-                        if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
+                        if (fe->ops.i2c_gate_ctrl)
+                                fe->ops.i2c_gate_ctrl(fe, 0);
                 }
         }
 
@@ -294,6 +296,16 @@ static int zl10353_init(struct dvb_frontend *fe)
         return 0;
 }
 
+static int zl10353_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
+{
+        u8 val = 0x0a;
+
+        if (enable)
+                val |= 0x10;
+
+        return zl10353_single_write(fe, 0x62, val);
+}
+
 static void zl10353_release(struct dvb_frontend *fe)
 {
         struct zl10353_state *state = fe->demodulator_priv;
@@ -352,6 +364,7 @@ static struct dvb_frontend_ops zl10353_ops = {
 
         .init = zl10353_init,
         .sleep = zl10353_sleep,
+        .i2c_gate_ctrl = zl10353_i2c_gate_ctrl,
         .write = zl10353_write,
 
         .set_frontend = zl10353_set_parameters,