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Re: [PATCH v4 19/23] drivers/fsi: Add GPIO based FSI master

From Benjamin Herrenschmidt <benh@au1.ibm.com>
Newsgroups linux.kernel
Subject Re: [PATCH v4 19/23] drivers/fsi: Add GPIO based FSI master
Date 2017-04-10 00:00 +0200
Message-ID <tut2i-8vx-5@gated-at.bofh.it> (permalink)
References (5 earlier) <tsAAW-7Yu-23@gated-at.bofh.it> <tsF7A-2v6-11@gated-at.bofh.it> <tuszg-8ld-7@gated-at.bofh.it> <tut2i-8vx-7@gated-at.bofh.it> <tut2i-8vx-9@gated-at.bofh.it>
Organization IBM Australia

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On Mon, 2017-04-10 at 07:53 +1000, Benjamin Herrenschmidt wrote:
> FYI. pdbg in userspace operates without any  delays in practice, the
> overhead between the various load/store instructions seems
> sufficient.
> 
> The only delay that's needed is when going through the FSI2PIB (to do
> SCOMs) where it seems like back-2-back accesses can be problematic.

Note: This isn't an objection to merging the patches. We can look at
doing an improved backend later.

Cheers,
Ben.

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Thread

[PATCH v4 19/23] drivers/fsi: Add GPIO based FSI master Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-29 19:50 +0200
  Re: [PATCH v4 19/23] drivers/fsi: Add GPIO based FSI master Joel Stanley <joel@jms.id.au> - 2017-03-30 08:00 +0200
    Re: [PATCH v4 19/23] drivers/fsi: Add GPIO based FSI master Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-03-30 20:20 +0200
      Re: [PATCH v4 19/23] drivers/fsi: Add GPIO based FSI master Benjamin Herrenschmidt <benh@kernel.crashing.org> - 2017-03-30 23:00 +0200
        Re: [PATCH v4 19/23] drivers/fsi: Add GPIO based FSI master Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-04-04 19:40 +0200
          Re: [PATCH v4 19/23] drivers/fsi: Add GPIO based FSI master Benjamin Herrenschmidt <benh@kernel.crashing.org> - 2017-04-05 00:30 +0200
            Re: [PATCH v4 19/23] drivers/fsi: Add GPIO based FSI master Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-04-05 03:30 +0200
            Re: [PATCH v4 19/23] drivers/fsi: Add GPIO based FSI master Christopher Bostic <cbostic@linux.vnet.ibm.com> - 2017-04-09 23:30 +0200
              Re: [PATCH v4 19/23] drivers/fsi: Add GPIO based FSI master Benjamin Herrenschmidt <benh@au1.ibm.com> - 2017-04-10 00:00 +0200
              Re: [PATCH v4 19/23] drivers/fsi: Add GPIO based FSI master Benjamin Herrenschmidt <benh@au1.ibm.com> - 2017-04-10 00:00 +0200
              Re: [PATCH v4 19/23] drivers/fsi: Add GPIO based FSI master Benjamin Herrenschmidt <benh@kernel.crashing.org> - 2017-04-10 00:50 +0200
      Re: [PATCH v4 19/23] drivers/fsi: Add GPIO based FSI master Joel Stanley <joel@jms.id.au> - 2017-03-31 01:00 +0200

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