narmstrong changed the topic of #linux-amlogic to: Amlogic mainline kernel development discussion - our wiki http://linux-meson.com/ - ml linux-amlogic@lists.infradead.org - Publicly Logged on https://irclog.whitequark.org/linux-amlogic
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<sim> Hello
<sim> I juste got a "La Frite" devie, running a AML-S805X-AC SoC
<sim> On the 40-pin header, according to the datasheet, there is two pins available for I2C SDA and SCK
<sim> I installed an Armbian distribution on the device
<sim> And the only I2C bus detected is about the HDMI
<sim> Looking at the DTS for this SoC I can't see anything obvious to enable an I2C device
<sim> If someone knows how I can make use of this I2C pins, please let me know
<sim> Thanks in advance
<rtp> sim: I dont remember for lafrite, but I guess that you need to enable the i2c_ao [ set status to okay ] and probably set it to use the pinctrl i2c_ao_pins. Double check before changing, of course.
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<sim> rtp: thanks for the hint
<sim> my plan was rather to get an easy setup with a device running Linux and providing some I2C host pins I could use to test some devices :)
<sim> I was not planning to rebuild the whole thing, hopping there is indeed an I2C controller behind the pins
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<lvrp16> sim: the i2c is actually uart next to the 5v headers, you need to turn off and use gpio-i2c
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<sim> I was thinking at I2C_SDA_A and I2C_SCL_A lvrp16, pin 27 and 28
<lvrp16> sim: you may need to enable a device tree overlay, see here for the samples https://github.com/libre-computer-project/libretech-overlays/tree/for-4.13.y/overlays
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<sim> lvrp16: thanks
<sim> lvrp16: indeed it was just as easy than enabling an already existing DTB overlay
<lvrp16> sim: yw, there's no firmware method for applying the overlay so you kind of have to do it manually using a u-boot script but it is coming
<sim> No it makes sense. After all the same pin can be muxed through different functions.
<lvrp16> sim: yes, the dt overlays will be integrated into the firmware and also loadable separately in the future
<sim> So I think it is nice to let the user to custom its DTB without forcing him to build it
<lvrp16> sim: integrated meaning it will be selectable
<sim> oh even better indeed
<lvrp16> sim: you can already override the default dtb that is passed via https://forum.loverpi.com/discussion/713/u-boot-firmware-guide-for-la-frite-aml-s805x-ac
<sim> anyway thanks for the help, I won't have find it alone
<sim> rtp: and you, you wanted to rebuild the whole thing. I know that ! :)
<sim> s/wanted/wanted me/
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