getting allwinner SoC support upstream (was Re: Uploading linux (3.9.4-1))

Thomas Petazzoni thomas.petazzoni at
Thu Jun 6 05:29:48 EDT 2013


On Wed, 5 Jun 2013 16:48:27 -0400, jonsmirl at wrote:

> >  fex covers *eeeeeevvveeerryyyythiiiing* - right from flipping the
> > multiplexing for all 3 SD/MMC cards so that you can pretend that SD0
> > is SD2 and you can specify *different* GPIOs for each to say which
> > is
> You can do all of this in device tree too. If the exact syntax doesn't
> exist you can use 'allwinner,' prefixes on the node names.
> Also check out pinctrl so that it doesn't get reinvented.

Are people looking at the mainline source code?

There is already a pinctrl driver for sunxi platforms (i.e Allwinner
SoCs), it's at drivers/pinctrl/pinctrl-sunxi.c, and it's DT-based and
allows to describe the pin muxing in the Device Tree.

Cc'ing Maxime Ripard, who is the mach-sunxi maintainer in the mainline

Best regards,

Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.

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