Re: regmap: mmio: regression in pre-v4.6-rc1

From: Alexander Stein
Date: Wed Mar 23 2016 - 05:43:27 EST

On Wednesday 23 March 2016 09:48:42, Alexander Stein wrote:
> I'm currently trying to get PCIe working on LS1021A (little-endian ARM). For link-detection I need access to a syscon perpheral (SCFG) which is attched to CPU as big-endian.
> The corresponding DT part is:
> scfg: scfg@1570000 {
> compatible = "fsl,ls1021a-scfg", "syscon";
> reg = <0x0 0x1570000 0x0 0x10000>;
> big-endian;
> };
> Based on current linus's master (a24e3d414e59ac765, "Merge branch 'akpm' (patches from Andrew)") I noticed the access is actually done as little-endian.
> I could track it down to commit 922a9f936e40001f ("regmap: mmio: Convert to regmap_bus and fix accessor usage"). Reverting it, the access is fine now and I get my PCIe link.

Just for the records, this also affects spi-fsl-dspi which is also attached in big-endian.

Best regards,