linux-kernel - [PATCH] Input: goodix - decouple irq and reset lines

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Message-ID: <1546617648-23445-1-git-send-email-alex.gonzalez@digi.com>
Date:   Fri, 4 Jan 2019 17:00:47 +0100
From:   Alex Gonzalez <alex.gonzalez@...i.com>
To:     <hadess@...ess.net>
CC:     <dmitry.torokhov@...il.com>, <linux-input@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <alex.gonzalez@...i.com>
Subject: [PATCH] Input: goodix - decouple irq and reset lines

The current implementation on the Goodix driver requires the two optional GPIOs
(RESET and INT) to be provided.

However, it is possible to designs the RESET line pulled-up and only provide
the INT line. Such designs do not work with the current implementation.

The patch attached allows for designs that only provide the INT line to have
a functional touch on the default I2C address, even though some functionality
like the sleep mode will not be available.

This has been tested on v4.20 with a gt911 based touch panel design that only
provides the INT line.

Alex Gonzalez (1):
  Input: goodix - decouple irq and reset lines

 drivers/input/touchscreen/goodix.c | 59 ++++++++++++++++++++------------------
 1 file changed, 31 insertions(+), 28 deletions(-)