linux-kernel - Re: [PATCH v4] ARM: dts: imx51-zii-rdu1: fix touchscreen pinctrl

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Message-ID: <CAFXsbZr-HJE54c0BC5=d1tStByA5ytGhSSZMirNKE03JzGCDXQ@mail.gmail.com>
Date:   Wed, 20 Jun 2018 21:22:20 -0700
From:   Chris Healy <cphealy@...il.com>
To:     Nick Dyer <nick@...anahar.org>
Cc:     Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        devicetree@...r.kernel.org, Fabio Estevam <festevam@...il.com>,
        Andrey Smirnov <andrew.smirnov@...il.com>,
        Nikita Yushchenko <nikita.yoush@...entembedded.com>,
        Lucas Stach <l.stach@...gutronix.de>, stable@...r.kernel.org
Subject: Re: [PATCH v4] ARM: dts: imx51-zii-rdu1: fix touchscreen pinctrl

On Wed, Jun 20, 2018 at 1:35 PM, Nick Dyer <nick@...anahar.org> wrote:
> The pinctrl settings were incorrect for the touchscreen interrupt line, causing
> an interrupt storm. This change has been tested with both the atmel_mxt_ts and
> RMI4 drivers on the RDU1 units.
>
> The value 0x4 comes from the value of register IOMUXC_SW_PAD_CTL_PAD_CSI1_D8
> from the old vendor kernel.
>
> Signed-off-by: Nick Dyer <nick@...anahar.org>
> Fixes: ceef0396f367 ("ARM: dts: imx: add ZII RDU1 board")
> Cc: <stable@...r.kernel.org> # 4.15+
> Reviewed-by: Fabio Estevam <fabio.estevam@....com>
> ---
> Changes in v4:
> - Add reviewed by Fabio
> Changes in v3:
> - Update commit message to add source of 0x4 value, fixes tag and CC stable
> Changes in v2:
> - Use hex, only alter IRQ line config

Tested on an RDU1 with Synaptics touchscreen successfully.  No
interrupt store any longer...

Tested-by: Chris Healy <cphealy@...il.com>