On 09/09/2011 02:46 PM, Daniel Glöckner wrote:
On Thu, Sep 08, 2011 at 07:34:32PM +0300, Antti Palosaari wrote:
I am working with AF9015 I2C-adapter lock. I need lock I2C-bus since
there is two tuners having same I2C address on same bus, demod I2C
gate is used to select correct tuner.
Would it be possible to use the i2c-mux framework to handle this?
Each tuner will then have its own i2c bus.
Interesting idea, but it didn't worked. It deadlocks. I think it locks
since I2C-mux is controlled by I2C "switch" in same I2C bus, not GPIO or
some other HW.
* tuner does I2C xfer on I2C-mux adapter
* I2C-mux adapter calls demod .i2c_gate_ctrl()
* demod does register access using I2C
* DEADLOCK
Maybe since tuner I2C xfer have already locked I2C-adater. Then demod
access same adapter and it is locked.
But nice I2C mux anyhow.
@David Daney, see that pic in order to get understanding what kind of
problem I am working;
http://palosaari.fi/linux/v4l-dv/controlling_tuner_af9015_dual_demod.txt
regards
Antti
--
http://palosaari.fi/
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
