linux-kernel - Re: [PATCH 0/5] Add support for MSCC Ocelot i2c

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Date:   Tue, 17 Jul 2018 15:21:20 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Wolfram Sang <wsa@...-dreams.de>,
        Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        James Hogan <jhogan@...nel.org>
Cc:     Paul Burton <paul.burton@...s.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mips@...ux-mips.org,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Allan Nielsen <allan.nielsen@...rosemi.com>
Subject: Re: [PATCH 0/5] Add support for MSCC Ocelot i2c

On Tue, 2018-07-17 at 13:48 +0200, Alexandre Belloni wrote:
> Hi,
> 
> Because the designware IP was not able to the the SDA hold time, MSCC
> has
> its own implementation. Add support for it and then add i2c on ocelot
> boards.
> 
> I would expect patches 1 to 3 to go through the i2c tree and 4-5
> through
> the mips tree once patch 3 has been reviewed by the DT maintainers.

Without reading datasheet it all feels like a wrong place to put.

But maybe that SoC (SoC family?) has some update to DesignWare IP.
Btw, what the version of DW IP it's using? 2.00a? More older, more
recent?


> Alexandre Belloni (5):
>   i2c: designware: factorize setting SDA hold time
>   i2c: designware: allow IP specific sda_hold_time
>   i2c: designware: add MSCC Ocelot support
>   mips: dts: mscc: Add i2c on ocelot
>   mips: dts: mscc: enable i2c on ocelot_pcb123
> 
>  .../bindings/i2c/i2c-designware.txt           |  5 ++-
>  arch/mips/boot/dts/mscc/ocelot.dtsi           | 19 +++++++++++
>  arch/mips/boot/dts/mscc/ocelot_pcb123.dts     |  5 +++
>  drivers/i2c/busses/i2c-designware-common.c    | 33
> +++++++++++++++++++
>  drivers/i2c/busses/i2c-designware-core.h      |  3 ++
>  drivers/i2c/busses/i2c-designware-master.c    | 22 +------------
>  drivers/i2c/busses/i2c-designware-platdrv.c   | 20 +++++++++++
>  drivers/i2c/busses/i2c-designware-slave.c     | 22 +------------
>  8 files changed, 86 insertions(+), 43 deletions(-)
> 

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy