From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Tue, 16 Dec 2014 09:45:27 +0000 Subject: [PATCH v10] iopoll: Introduce memory-mapped IO polling macros In-Reply-To: <1418687243-16395-1-git-send-email-mitchelh@codeaurora.org> References: <1418687243-16395-1-git-send-email-mitchelh@codeaurora.org> Message-ID: <20141216094527.GC6580@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Mon, Dec 15, 2014 at 11:47:23PM +0000, Mitchel Humpherys wrote: > From: Matt Wagantall > > It is sometimes necessary to poll a memory-mapped register until its value > satisfies some condition. Introduce a family of convenience macros that do > this. Tight-looping, sleeping, and timing out can all be accomplished using > these macros. > > Cc: Thierry Reding > Cc: Will Deacon > Cc: Arnd Bergmann > Cc: Andrew Morton > Cc: Robert Elliott > Signed-off-by: Matt Wagantall > Signed-off-by: Mitchel Humpherys > --- > v9..10: > - Actually added the comments mentioned in v8..v9 (doh!) > > v8..v9: > - Added note in comments about max sleep time (Rob Elliott) > > v7..v8: > - sorted helper macros by size (b, w, l, q) > - removed some of the more esoteric (or flat-out bogus) helper macros > > This patch was originally part of a series [1] for adding support for IOMMU > address translations through an ARM SMMU hardware register. The other > patch in the series (the one that actually uses these macros and implements > said hardware address translations) was Ack'd by the driver maintainer > there (Will Deacon) so I've pulled this patch out to avoid resending an > already Ack'd patch over and over again. > > In short, please see [1] for previous discussion and the first user of > these macros. > > Will also acked this patch in [2]. I didn't retain his Ack here because I > added to the macro comments. You can keep the ack, it still looks good to me and I'm not really fussed about the comments. Will