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Date:   Fri, 10 Aug 2018 12:10:41 +0200
From:   Linus Walleij <>
To:     Janusz Krzysztofik <>
Cc:     Boris Brezillon <>,
        Jonathan Corbet <>,
        Miquèl Raynal <>,
        Richard Weinberger <>,
        David Woodhouse <>,
        Brian Norris <>,
        Mark Vasut <>,
        ext Tony Lindgren <>,
        Aaro Koskinen <>,
        Linux ARM <>,
        Linux-OMAP <>,,,
        "open list:GPIO SUBSYSTEM" <>,
        "" <>
Subject: Re: [RFC PATCH v2 03/12] ARM: OMAP1: ams-delta: Provide GPIO lookup
 table for NAND data port

On Tue, Aug 7, 2018 at 12:29 AM Janusz Krzysztofik <> wrote:

> Data port used by Amstrad Delta NAND driver is actually an OMAP MPUIO
> device, already under control of gpio-omap driver.  The NAND driver
> gets access to the port by ioremapping it and performs read/write
> operations.  That is done without any proteciton from other users
> legally manipulating the port pins over GPIO API.
> The plan is to convert the driver to access the port over GPIO consumer
> API.  Before that is implemented, the driver can already obtain
> exclusive access to the port by requesting an array of its GPIO
> descriptors.
> Add respective entries to the NAND GPIO lookup table.
> Signed-off-by: Janusz Krzysztofik <>

Reviewed-by: Linus Walleij <>

Linus Walleij

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