[PATCH] mtd: rawnand: driver for Mediatek MT7621 SoC NAND flash controller

René van Dorst opensource at vdorst.com
Thu Nov 7 01:20:53 PST 2019

Quoting gerg at kernel.org:

> From: Greg Ungerer <gerg at kernel.org>
> Add a driver to support the NAND flash controller of the MediaTek MT7621
> System-on-Chip device. (This one is the MIPS based parts from Mediatek).
> This code is a re-working of the earlier patches for this hardware that
> have been floating around the internet for years:
> https://github.com/ReclaimYourPrivacy/cloak/blob/master/target/linux/ramips/patches-3.18/0045-mtd-add-mt7621-nand-support.patch
> This is a much cleaned up version, put in staging to start with.
> It does still have some problems, mainly that it still uses a lot of the
> mtd raw nand legacy support.
> The driver not only compiles, but it works well on the small range of
> hardware platforms that it has been used on so far. I have been using
> for quite a while now, cleaning up as I get time.
> So... I am looking for comments on the best approach forward with this.
> At least in staging it can get some more eyeballs going over it.
> There is a mediatek nand driver already, mtk_nand.c, for their ARM based
> System-on-Chip devices. That hardware module looks to have some hardware
> similarities with this one. At this point I don't know if that can be
> used on the 7621 based devices. (I tried a quick and dirty setup and had
> no success using it on the 7621).
> Thoughts?

+CC DENG Qingfang, Chuanhong Guo, Weijie Gao to the list.

Hi Greg,

Thanks for posting this driver.

But I would like to mention that the openwrt community is currently  
working on a
new version which is based a newer version of the MediaTek vendor driver.
That version is currently targeted for the openwrt 4.19 kernel.
See full pull request [1] and NAND driver patch [2]

It would be a shame if duplicate work has been done.



[1]: https://github.com/openwrt/openwrt/pull/2385


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