BayTrail I2C support
Hi Simon, Hi Bin,
could you please let me know, what the status of I2C support for BayTrail in U-Boot is? Is this driver generic enough to handle BayTrail / Minnowboard MAX as well (I haven't looked in depth yet)? Or what needs to be done to get BayTrail supported here?
Thanks,
Stefan
Hi Stefan,
Quoted 6 lines · Stefan Roese
Hi Simon, Hi Bin,
could you please let me know, what the status of I2C support for BayTrail in U-Boot is? Is this driver generic enough to handle BayTrail / Minnowboard MAX as well (I haven't looked in depth yet)? Or what needs to be done to get BayTrail supported here?
There is a dummy driver but it does not work. It needs to be filled out with an implementation using the datasheet or perhaps looking at coreboot smbus code.
Regards,
Simon
Hi Stefan,
Quoted 5 lines · Simon Glass
Hi Stefan,
Quoted 2 lines · Stefan Roese
Hi Simon, Hi Bin,
Quoted 9 lines
Quoted 4 lines
could you please let me know, what the status of I2C support for BayTrail in U-Boot is? Is this driver generic enough to handle BayTrail / Minnowboard MAX as well (I haven't looked in depth yet)? Or what needs to be done to get BayTrail supported here?
There is a dummy driver but it does not work. It needs to be filled out with an implementation using the datasheet or perhaps looking at coreboot smbus code.
I guess Stefan is not looking for legacy SMBUS support, instead the SIO I2C device on device 24 on BayTrail. It is currently not supported. The IP used on BayTrail is from Synopsis Designware, and this I2C IP is also seen on Intel Quark. It is possible we can reuse U-Boot Synopsis I2C driver on Intel platform, with adaptations to PCI.
Regards,
Bin
Hi Bin,
Quoted 11 lines · Bin Meng
Quoted 10 lines · Simon Glass
Hi Stefan,
Quoted 6 lines · Stefan Roese
Hi Simon, Hi Bin,
could you please let me know, what the status of I2C support for BayTrail in U-Boot is? Is this driver generic enough to handle BayTrail / Minnowboard MAX as well (I haven't looked in depth yet)? Or what needs to be done to get BayTrail supported here?
Quoted 7 lines
Quoted 4 lines
There is a dummy driver but it does not work. It needs to be filled out with an implementation using the datasheet or perhaps looking at coreboot smbus code.
I guess Stefan is not looking for legacy SMBUS support, instead the SIO I2C device on device 24 on BayTrail.
I need to communicate with some of I2C devices connected to some of the I2C busses (e.g. bus #1) on this platform.
Quoted 3 lines
It is currently not
supported. The IP used on BayTrail is from Synopsis Designware, and this I2C IP is also seen on Intel Quark.
Is it documented somewhere, that these BayTrail I2C controllers are Synopsis Designware based / compatible? Could you please point me to this datasheet?
Quoted 2 lines
It is possible we can reuse
U-Boot Synopsis I2C driver on Intel platform, with adaptations to PCI.
I can definitely look into this. Thanks for letting me know.
Thanks,
Stefan
Hi Stefan,
Quoted 30 lines · Stefan Roese
Hi Bin,
Quoted 15 lines · Bin Meng
Quoted 13 lines · Simon Glass
Hi Stefan,
Quoted 7 lines · Stefan Roese
Hi Simon, Hi Bin,
could you please let me know, what the status of I2C support for BayTrail in U-Boot is? Is this driver generic enough to handle BayTrail / Minnowboard MAX as well (I haven't looked in depth yet)? Or what needs to be done to get BayTrail supported here?
Quoted 7 lines
Quoted 4 lines
There is a dummy driver but it does not work. It needs to be filled out with an implementation using the datasheet or perhaps looking at coreboot smbus code.
I guess Stefan is not looking for legacy SMBUS support, instead the SIO I2C device on device 24 on BayTrail.
I need to communicate with some of I2C devices connected to some of the I2C busses (e.g. bus #1) on this platform.
Quoted 8 lines
Quoted 3 lines
It is currently not
supported. The IP used on BayTrail is from Synopsis Designware, and this I2C IP is also seen on Intel Quark.Is it documented somewhere, that these BayTrail I2C controllers are Synopsis Designware based / compatible? Could you please point me to this datasheet?
I don't think it is documented somewhere that the IP comes from Synopsis Designware. I noticed this when I was working on Intel Quark support, that lots of IPs on Intel Quark are from Synopsis (eg: we have the Synopsis Designware ethernet driver working on Intel Quark).
Quoted 6 lines
Quoted 3 lines
It is possible we can reuse
U-Boot Synopsis I2C driver on Intel platform, with adaptations to PCI.I can definitely look into this. Thanks for letting me know.
Regards,
Bin