Hi,x On Mon, Dec 21, 2015 at 11:46:18AM +0100, Hans de Goede wrote: > >On the side, any thoughts on how to handle the differences between various "Q8" > >tablets, like different I2C-based sensors and WiFi chips? > > For i2c based sensors the plan is to use devicetree overlays + an in kernel > overlay manager which probes the i2c bus (checking known touchscreen / accelerometer > addresses) and then picks the right touchscreen + accelerometer overlays. > > Wifi is somewhat more tricky I must admit, esp. since there seem to be q8 a23 based > tablet variants with usb wifi and others with sdio wifi. Since both busses are > discoverable I'm tempted to just enable both in devicetree, and let the kernel probe > and see what is actually there. This assume that the way the wifichip is powered > is the same on all boards, or at least that it is safe to enable the necessary > regulators on all boards ... > > >I'm asking because with Maxime's couple-regulator we should be able to get the > >RTL8723BS on the Q8 A23/33 v1.5 working. > > So this means enabled the sdio controller (should be safe on all boards?) and > enabling 2 regulators to power the wifi-chip. I think it will be safe to do this > even on boards where those regulators are not used, what do you think ? Wouldn't that introduce some useless power drain on those boards? Thanks! Maxime -- Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com
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