diff --git a/drivers/media/dvb-core/dvb_frontend.h b/drivers/media/dvb-core/dvb_frontend.h
index c6c85e6..1159959 100644
--- a/drivers/media/dvb-core/dvb_frontend.h
+++ b/drivers/media/dvb-core/dvb_frontend.h
@@ -206,7 +206,10 @@
  *			resuming from suspend.
  * @set_params:		callback function used to inform the tuner to tune
  *			into a digital TV channel. The properties to be used
- *			are stored at @dvb_frontend.dtv_property_cache;.
+ *			are stored at @dvb_frontend.dtv_property_cache;. The
+ *			tuner demod can change the parameters to reflect the
+ *			changes needed for the channel to be tuned, and
+ *			update statistics.
  * @set_analog_params:	callback function used to tune into an analog TV
  *			channel on hybrid tuners. It passes @analog_parameters;
  *			to the driver.
@@ -332,6 +335,86 @@
 
 struct dtv_frontend_properties;
 
+
+/**
+ * struct dvb_frontend_ops
+ *
+ * @info:		embedded struct dvb_tuner_info with tuner properties
+ * @delsys:		Delivery systems supported by the frontend
+ * @release:		callback function called when frontend is dettached.
+ *			drivers should free any allocated memory.
+ * @release_sec:	callback function requesting that the Satelite Equipment
+ *			Control (SEC) driver to release and free any memory
+ *			allocated by the driver.
+ * @init:		callback function used to initialize the tuner device.
+ * @sleep:		callback function used to put the tuner to sleep.
+ * @write:		callback function used by some demod legacy drivers to
+ *			allow other drivers to write data into their registers.
+ *			Should not be used on new drivers.
+ * @tune:		callback function used by demod drivers that use
+ *			@DVBFE_ALGO_HW; to tune into a frequency.
+ * @get_frontend_algo:	returns the desired hardware algorithm.
+ * @set_frontend:	callback function used to inform the demod to set the
+ *			parameters for demodulating a digital TV channel.
+ *			The properties to be used are stored at
+ *			@dvb_frontend.dtv_property_cache;. The demod can change
+ *			the parameters to reflect the changes needed for the
+ *			channel to be decoded, and update statistics.
+ * @get_tune_settings:	callback function
+ * @get_frontend:	callback function used to inform the parameters
+ *			actuall in use. The properties to be used are stored at
+ *			@dvb_frontend.dtv_property_cache; and update
+ *			statistics. Please notice that it should not return
+ *			an error code if the statistics are not available
+ *			because the demog is not locked.
+ * @read_status:	returns the locking status of the frontend.
+ * @read_ber:		legacy callback function to return the bit error rate.
+ *			Newer drivers should provide such info via DVBv5 API,
+ *			e. g. @set_frontend;/@get_frontend;, implementing this
+ *			callback only if DVBv3 API compatibility is wanted.
+ * @read_signal_strength: legacy callback function to return the signal
+ *			strength. Newer drivers should provide such info via
+ *			DVBv5 API, e. g. @set_frontend;/@get_frontend;,
+ *			implementing this callback only if DVBv3 API
+ *			compatibility is wanted.
+ * @read_snr:		legacy callback function to return the Signal/Noise
+ * 			rate. Newer drivers should provide such info via
+ *			DVBv5 API, e. g. @set_frontend;/@get_frontend;,
+ *			implementing this callback only if DVBv3 API
+ *			compatibility is wanted.
+ * @read_ucblocks:	legacy callback function to return the Uncorrected Error
+ *			Blocks. Newer drivers should provide such info via
+ *			DVBv5 API, e. g. @set_frontend;/@get_frontend;,
+ *			implementing this callback only if DVBv3 API
+ *			compatibility is wanted.
+ * @diseqc_reset_overload: callback function to implement the
+ *			FE_DISEQC_RESET_OVERLOAD ioctl.
+ * @diseqc_send_master_cmd: callback function to implement the
+ *			FE_DISEQC_SEND_MASTER_CMD ioctl.
+ * @diseqc_recv_slave_reply: callback function to implement the
+ *			FE_DISEQC_RECV_SLAVE_REPLY ioctl.
+ * @diseqc_send_burst:	callback function to implement the
+ *			FE_DISEQC_SEND_BURST ioctl.
+ * @set_tone:		callback function to implement the
+ *			FE_SET_TONE ioctl.
+ * @set_voltage:	callback function to implement the
+ *			FE_SET_VOLTAGE ioctl.
+ * @enable_high_lnb_voltage: callback function to implement the
+ *			FE_ENABLE_HIGH_LNB_VOLTAGE ioctl.
+ * @dishnetwork_send_legacy_command: callback function to implement the
+ *			FE_DISHNETWORK_SEND_LEGACY_CMD ioctl.
+ * @i2c_gate_ctrl:	controls the I2C gate. Newer drivers should use I2C
+ *			mux support instead.
+ * @ts_bus_ctrl:	callback function used to take control of the TS bus.
+ * @set_lna:		callback function to power on/off/auto the LNA.
+ * @search:		callback function used on some custom algo search algos.
+ * @tuner_ops:		pointer to struct dvb_tuner_ops
+ * @analog_ops:		pointer to struct analog_demod_ops
+ * @set_property:	callback function to allow the frontend to validade
+ *			incoming properties. Should not be used on new drivers.
+ * @get_property:	callback function to allow the frontend to override
+ *			outcoming properties. Should not be used on new drivers.
+ */
 struct dvb_frontend_ops {
 
 	struct dvb_frontend_info info;
@@ -352,6 +435,7 @@
 		    unsigned int mode_flags,
 		    unsigned int *delay,
 		    enum fe_status *status);
+
 	/* get frontend tuning algorithm from the module */
 	enum dvbfe_algo (*get_frontend_algo)(struct dvb_frontend *fe);