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From: Alexander Stein <alexander.stein@systec-electronic.com>
To: linux-kernel@vger.kernel.org
Cc: Mark Brown <broonie@kernel.org>
Subject: regmap: mmio: regression in pre-v4.6-rc1
Date: Wed, 23 Mar 2016 09:48:42 +0100	[thread overview]
Message-ID: <1981840.HVGTg07J9M@ws-stein> (raw)

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

             reply	other threads:[~2016-03-23  8:49 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-23  8:48 Alexander Stein [this message]
2016-03-23  9:43 ` regmap: mmio: regression in pre-v4.6-rc1 Alexander Stein
2016-03-23 10:34 ` Mark Brown
2016-03-23 11:16   ` Alexander Stein
2016-03-23 11:39     ` Mark Brown
2016-03-23 11:50       ` Alexander Stein
2016-03-23 12:05         ` Mark Brown

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