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

From	Alexander Stein <alexander.stein@systec-electronic.com>
Newsgroups	linux.kernel
Subject	regmap: mmio: regression in pre-v4.6-rc1
Date	2016-03-23 09:50 +0100
Message-ID	<rfMEi-Or-7@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Hi,

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.

Best regards,
Alexander

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regmap: mmio: regression in pre-v4.6-rc1 Alexander Stein <alexander.stein@systec-electronic.com> - 2016-03-23 09:50 +0100
  Re: regmap: mmio: regression in pre-v4.6-rc1 Alexander Stein <alexander.stein@systec-electronic.com> - 2016-03-23 10:50 +0100
  Re: regmap: mmio: regression in pre-v4.6-rc1 Mark Brown <broonie@kernel.org> - 2016-03-23 11:40 +0100
    Re: regmap: mmio: regression in pre-v4.6-rc1 Alexander Stein <alexander.stein@systec-electronic.com> - 2016-03-23 12:20 +0100
      Re: regmap: mmio: regression in pre-v4.6-rc1 Mark Brown <broonie@kernel.org> - 2016-03-23 12:40 +0100
        Re: regmap: mmio: regression in pre-v4.6-rc1 Alexander Stein <alexander.stein@systec-electronic.com> - 2016-03-23 13:00 +0100
          Re: regmap: mmio: regression in pre-v4.6-rc1 Mark Brown <broonie@kernel.org> - 2016-03-23 13:10 +0100

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