[PATCH v7 11/24] [media] rtl2832: convert to use an explicit i2c mux core

Peter Rosin
2016-04-20T15:20:12Z

Allocate an explicit i2c mux core to handle parent and child adapters
etc. Update the select/deselect ops to be in terms of the i2c mux core
instead of the child adapter.

Reviewed-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Peter Rosin <peda@axentia.se>
---
drivers/media/dvb-frontends/rtl2832.c | 25 ++++++++++++++-----------
drivers/media/dvb-frontends/rtl2832_priv.h | 2 +-
2 files changed, 15 insertions(+), 12 deletions(-)

diff --git a/drivers/media/dvb-frontends/rtl2832.c b/drivers/media/dvb-frontends/rtl2832.c
index 7c96f7679669..1b23788797b5 100644
--- a/drivers/media/dvb-frontends/rtl2832.c
+++ b/drivers/media/dvb-frontends/rtl2832.c
@@ -847,9 +847,9 @@ err:
dev_dbg(&client->dev, "failed=%d\n", ret);
}

-static int rtl2832_select(struct i2c_adapter *adap, void *mux_priv, u32 chan_id)
+static int rtl2832_select(struct i2c_mux_core *muxc, u32 chan_id)
{
- struct rtl2832_dev *dev = mux_priv;
+ struct rtl2832_dev *dev = i2c_mux_priv(muxc);
struct i2c_client *client = dev->client;
int ret;

@@ -870,10 +870,9 @@ err:
return ret;
}

-static int rtl2832_deselect(struct i2c_adapter *adap, void *mux_priv,
- u32 chan_id)
+static int rtl2832_deselect(struct i2c_mux_core *muxc, u32 chan_id)
{
- struct rtl2832_dev *dev = mux_priv;
+ struct rtl2832_dev *dev = i2c_mux_priv(muxc);

schedule_delayed_work(&dev->i2c_gate_work, usecs_to_jiffies(100));
return 0;
@@ -1059,7 +1058,7 @@ static struct i2c_adapter *rtl2832_get_i2c_adapter(struct i2c_client *client)
struct rtl2832_dev *dev = i2c_get_clientdata(client);

dev_dbg(&client->dev, "\n");
- return dev->i2c_adapter_tuner;
+ return dev->muxc->adapter[0];
}

static int rtl2832_slave_ts_ctrl(struct i2c_client *client, bool enable)
@@ -1242,12 +1241,16 @@ static int rtl2832_probe(struct i2c_client *client,
goto err_regmap_exit;

/* create muxed i2c adapter for demod tuner bus */
- dev->i2c_adapter_tuner = i2c_add_mux_adapter(i2c, &i2c->dev, dev,
- 0, 0, 0, rtl2832_select, rtl2832_deselect);
- if (dev->i2c_adapter_tuner == NULL) {
- ret = -ENODEV;
+ dev->muxc = i2c_mux_alloc(i2c, &i2c->dev, 1, 0, 0,
+ rtl2832_select, rtl2832_deselect);
+ if (!dev->muxc) {
+ ret = -ENOMEM;
goto err_regmap_exit;
}
+ dev->muxc->priv = dev;
+ ret = i2c_mux_add_adapter(dev->muxc, 0, 0, 0);
+ if (ret)
+ goto err_regmap_exit;

/* create dvb_frontend */
memcpy(&dev->fe.ops, &rtl2832_ops, sizeof(struct dvb_frontend_ops));
@@ -1282,7 +1285,7 @@ static int rtl2832_remove(struct i2c_client *client)

cancel_delayed_work_sync(&dev->i2c_gate_work);

- i2c_del_mux_adapter(dev->i2c_adapter_tuner);
+ i2c_mux_del_adapters(dev->muxc);

regmap_exit(dev->regmap);

diff --git a/drivers/media/dvb-frontends/rtl2832_priv.h b/drivers/media/dvb-frontends/rtl2832_priv.h
index 6b875f462f8b..d8f97d14f6fd 100644
--- a/drivers/media/dvb-frontends/rtl2832_priv.h
+++ b/drivers/media/dvb-frontends/rtl2832_priv.h
@@ -36,7 +36,7 @@ struct rtl2832_dev {
struct mutex regmap_mutex;
struct regmap_config regmap_config;
struct regmap *regmap;
- struct i2c_adapter *i2c_adapter_tuner;
+ struct i2c_mux_core *muxc;
struct dvb_frontend fe;
enum fe_status fe_status;
u64 post_bit_error_prev; /* for old DVBv3 read_ber() calculation */
--
2.1.4