RTL2832 provides gated / repeater I2C adapter for tuner.
Implement it as a muxed I2C adapter.
Signed-off-by: Antti Palosaari <cr...@iki.fi>
---
drivers/media/dvb-frontends/Kconfig | 2 +-
drivers/media/dvb-frontends/rtl2832.c | 26 ++++++++++++++++++++++++++
drivers/media/dvb-frontends/rtl2832.h | 13 +++++++++++++
drivers/media/dvb-frontends/rtl2832_priv.h | 2 ++
4 files changed, 42 insertions(+), 1 deletion(-)
diff --git a/drivers/media/dvb-frontends/Kconfig
b/drivers/media/dvb-frontends/Kconfig
index dd12a1e..d701488 100644
--- a/drivers/media/dvb-frontends/Kconfig
+++ b/drivers/media/dvb-frontends/Kconfig
@@ -441,7 +441,7 @@ config DVB_RTL2830
config DVB_RTL2832
tristate "Realtek RTL2832 DVB-T"
- depends on DVB_CORE && I2C
+ depends on DVB_CORE && I2C && I2C_MUX
default m if !MEDIA_SUBDRV_AUTOSELECT
help
Say Y when you want to support this frontend.
diff --git a/drivers/media/dvb-frontends/rtl2832.c
b/drivers/media/dvb-frontends/rtl2832.c
index 00e63b9..dc46cf0 100644
--- a/drivers/media/dvb-frontends/rtl2832.c
+++ b/drivers/media/dvb-frontends/rtl2832.c
@@ -891,9 +891,29 @@ static void rtl2832_release(struct dvb_frontend *fe)
struct rtl2832_priv *priv = fe->demodulator_priv;
dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+ i2c_del_mux_adapter(priv->i2c_adapter);
kfree(priv);
}
+static int rtl2832_select(struct i2c_adapter *adap, void *mux_priv, u32 chan)
+{
+ struct rtl2832_priv *priv = mux_priv;
+ return rtl2832_i2c_gate_ctrl(&priv->fe, 1);
+}
+
+static int rtl2832_deselect(struct i2c_adapter *adap, void *mux_priv, u32 chan)
+{
+ struct rtl2832_priv *priv = mux_priv;
+ return rtl2832_i2c_gate_ctrl(&priv->fe, 0);
+}
+
+struct i2c_adapter *rtl2832_get_i2c_adapter(struct dvb_frontend *fe)
+{
+ struct rtl2832_priv *priv = fe->demodulator_priv;
+ return priv->i2c_adapter;
+}
+EXPORT_SYMBOL(rtl2832_get_i2c_adapter);
+
struct dvb_frontend *rtl2832_attach(const struct rtl2832_config *cfg,
struct i2c_adapter *i2c)
{
@@ -918,6 +938,12 @@ struct dvb_frontend *rtl2832_attach(const struct
rtl2832_config *cfg,
if (ret)
goto err;
+ /* create muxed i2c adapter */
+ priv->i2c_adapter = i2c_add_mux_adapter(i2c, &i2c->dev, priv, 0, 0, 0,
+ rtl2832_select, rtl2832_deselect);
+ if (priv->i2c_adapter == NULL)
+ goto err;
+
/* create dvb_frontend */
memcpy(&priv->fe.ops, &rtl2832_ops, sizeof(struct dvb_frontend_ops));
priv->fe.demodulator_priv = priv;
diff --git a/drivers/media/dvb-frontends/rtl2832.h
b/drivers/media/dvb-frontends/rtl2832.h
index fa4e5f6..a9202d7 100644
--- a/drivers/media/dvb-frontends/rtl2832.h
+++ b/drivers/media/dvb-frontends/rtl2832.h
@@ -55,7 +55,13 @@ struct dvb_frontend *rtl2832_attach(
const struct rtl2832_config *cfg,
struct i2c_adapter *i2c
);
+
+extern struct i2c_adapter *rtl2832_get_i2c_adapter(
+ struct dvb_frontend *fe
+);
+
#else
+
static inline struct dvb_frontend *rtl2832_attach(
const struct rtl2832_config *config,
struct i2c_adapter *i2c
@@ -64,6 +70,13 @@ static inline struct dvb_frontend *rtl2832_attach(
pr_warn("%s: driver disabled by Kconfig\n", __func__);
return NULL;
}
+
+static inline struct i2c_adapter *rtl2832_get_i2c_adapter(
+ struct dvb_frontend *fe
+)
+{
+ return NULL;
+}
#endif
diff --git a/drivers/media/dvb-frontends/rtl2832_priv.h
b/drivers/media/dvb-frontends/rtl2832_priv.h
index 4c845af..ec26c92 100644
--- a/drivers/media/dvb-frontends/rtl2832_priv.h
+++ b/drivers/media/dvb-frontends/rtl2832_priv.h
@@ -23,9 +23,11 @@
#include "dvb_frontend.h"
#include "rtl2832.h"
+#include <linux/i2c-mux.h>
struct rtl2832_priv {
struct i2c_adapter *i2c;
+ struct i2c_adapter *i2c_adapter;
struct dvb_frontend fe;
struct rtl2832_config cfg;
--
1.8.5.3
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