As should be clear for the title and patch title, this is adding initial support for the OMAP 4460 SOM and dev kit for Phytec's PCM959 evaluation kit. The PCM049 is a legacy SOM offered by Phytec: https://www.phytec.com/legacy-soms/ There was a vendor BSP offered by Phytec, but that never entered the Device Tree era. This patch is meant to change that. This devicetree boots into a stable state from mainline Barebox, where the devices are supported. I used the Pandaboard as my Buildroot template to make a bootable SD card. MDEV loads all modules. I'm doing verification with omap2plus_defconfig. I'm submitting this as an RFC for two reasons. First, because we're now in the 6.1 window, but second because there are some uncertainties that came up while upgrading everything. Particularly around GPMC. As far as I can tell, the flash and ethernet both work as expected. The timings from omap-gpmc-smsc9221.dtsi are what is needed (even though they don't match Barebox). I also used the timings from omap3-ldp.dts as my guide for the flash timings, as it seemed to be the only OMAP2+ GPMC device that has Micron NAND. The main difference that I came across was NAND Flash ECC settings. Initially I could run `dd if=/dev/mtd0 of=foo count=1` and read the flash, but see ECC errors. It wasn't until I added ti,elm-id = <&elm>; that I saw these errors go away. Seemingly none of this code existed at the time of the last vendor BSP update (3.4.41) so I'm hopeful that this is correct - or at least not a "red flag, you're doing it completely wrong and your flash is going to corrupt itself tomorrow" scenario. Colin Foster (1): arm: dts: omap4: pcm959: add initial support for phytec pcm959 arch/arm/boot/dts/Makefile | 1 + arch/arm/boot/dts/omap4-phytec-pcm-049.dtsi | 352 ++++++++++++++++++++ arch/arm/boot/dts/omap4-phytec-pcm-959.dts | 130 ++++++++ 3 files changed, 483 insertions(+) create mode 100644 arch/arm/boot/dts/omap4-phytec-pcm-049.dtsi create mode 100644 arch/arm/boot/dts/omap4-phytec-pcm-959.dts -- 2.25.1
