linux-kernel - [PATCH v4 11/18] [media] rtl2832: convert to use an explicit i2c mux core

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Date:	Thu,  3 Mar 2016 23:27:23 +0100
From:	Peter Rosin <peda@...ator.liu.se>
To:	linux-kernel@...r.kernel.org
Cc:	Peter Rosin <peda@...ntia.se>, Wolfram Sang <wsa@...-dreams.de>,
	Peter Korsgaard <peter.korsgaard@...co.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Jonathan Cameron <jic23@...nel.org>,
	Hartmut Knaack <knaack.h@....de>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Peter Meerwald <pmeerw@...erw.net>,
	Antti Palosaari <crope@....fi>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Rob Herring <robh+dt@...nel.org>,
	Frank Rowand <frowand.list@...il.com>,
	Grant Likely <grant.likely@...aro.org>,
	Adriana Reus <adriana.reus@...el.com>,
	Viorel Suman <viorel.suman@...el.com>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Terry Heo <terryheo@...gle.com>,
	Hans Verkuil <hans.verkuil@...co.com>,
	Arnd Bergmann <arnd@...db.de>,
	Tommi Rantala <tt.rantala@...il.com>,
	linux-i2c@...r.kernel.org, linux-iio@...r.kernel.org,
	linux-media@...r.kernel.org, devicetree@...r.kernel.org,
	Peter Rosin <peda@...ator.liu.se>
Subject: [PATCH v4 11/18] [media] rtl2832: convert to use an explicit i2c mux core

From: Peter Rosin <peda@...ntia.se>

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.

Signed-off-by: Peter Rosin <peda@...ntia.se>
---
 drivers/media/dvb-frontends/rtl2832.c      | 22 +++++++++++-----------
 drivers/media/dvb-frontends/rtl2832_priv.h |  2 +-
 2 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/media/dvb-frontends/rtl2832.c b/drivers/media/dvb-frontends/rtl2832.c
index 10f2119935da..775444898599 100644
--- a/drivers/media/dvb-frontends/rtl2832.c
+++ b/drivers/media/dvb-frontends/rtl2832.c
@@ -866,9 +866,9 @@ 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;
 
@@ -889,10 +889,9 @@ 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;
@@ -1078,7 +1077,7 @@ 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_enable_slave_ts(struct i2c_client *client)
@@ -1253,12 +1252,13 @@ 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_one_adapter(i2c, &i2c->dev, 0, 0, 0, 0, 0,
+					rtl2832_select, rtl2832_deselect);
+	if (IS_ERR(dev->muxc)) {
+		ret = PTR_ERR(dev->muxc);
 		goto err_regmap_exit;
 	}
+	dev->muxc->priv = dev;
 
 	/* create dvb_frontend */
 	memcpy(&dev->fe.ops, &rtl2832_ops, sizeof(struct dvb_frontend_ops));
@@ -1293,7 +1293,7 @@ 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 5dcd3a41d23f..6b3cd23a2c26 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;
 	struct delayed_work stat_work;
 	enum fe_status fe_status;
-- 
2.1.4