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From:   Chris Packham <chris.packham@alliedtelesis.co.nz>
To:     broonie@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com,
        Andy Shevchenko <andy.shevchenko@gmail.com>
Cc:     linux-spi@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        Chris Packham <chris.packham@alliedtelesis.co.nz>
Subject: [PATCH v5 0/2] SPI bus multiplexing
Date:   Tue,  4 Feb 2020 16:28:36 +1300
Message-Id: <20200204032838.20739-1-chris.packham@alliedtelesis.co.nz>
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This is a revisit of two earlier efforts to add more complex mutliplexing=
 to
SPI busses.

https://patchwork.kernel.org/patch/2706151/
https://patchwork.kernel.org/patch/10897255/

This version makes use of the general purpose mux controller which simpli=
fies
things greatly.

One outstanding problem is the need for the spi-max-frequency on the mux
device. This is not used for anything and is just needed to satisfy the s=
pi
driver infrastructure which expects all spi devices to have this property=
.

Chris Packham (2):
  dt-bindings: spi: Document binding for generic SPI multiplexer
  spi: Add generic SPI multiplexer

 .../devicetree/bindings/spi/spi-mux.yaml      |  89 +++++++++
 drivers/spi/Kconfig                           |  11 ++
 drivers/spi/Makefile                          |   1 +
 drivers/spi/spi-mux.c                         | 187 ++++++++++++++++++
 4 files changed, 288 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spi/spi-mux.yaml
 create mode 100644 drivers/spi/spi-mux.c

--=20
2.25.0