From: Stephan Gerhold <stephan@gerhold.net>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: linux-input@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
devicetree@vger.kernel.org, Stephan Gerhold <stephan@gerhold.net>,
Linus Walleij <linus.walleij@linaro.org>
Subject: [PATCH 2/3] dt-bindings: Input: tm2-touchkey - document vddio-supply
Date: Thu, 3 Dec 2020 14:12:41 +0100 [thread overview]
Message-ID: <20201203131242.44397-2-stephan@gerhold.net> (raw)
In-Reply-To: <20201203131242.44397-1-stephan@gerhold.net>
The Samsung touchkey controllers are often used with external pull-up
for the interrupt line and the I2C lines, so we might need to enable
a regulator to bring the lines into usable state. Otherwise, this might
cause spurious interrupts and reading from I2C will fail.
Document support for a "vddio-supply" that is enabled by the tm2-touchkey
driver so that the regulator gets enabled when needed.
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
---
.../devicetree/bindings/input/cypress,tm2-touchkey.yaml | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/Documentation/devicetree/bindings/input/cypress,tm2-touchkey.yaml b/Documentation/devicetree/bindings/input/cypress,tm2-touchkey.yaml
index 90d4def83182..52dca8b64081 100644
--- a/Documentation/devicetree/bindings/input/cypress,tm2-touchkey.yaml
+++ b/Documentation/devicetree/bindings/input/cypress,tm2-touchkey.yaml
@@ -37,6 +37,11 @@ properties:
vcc-supply:
description: Optional regulator for MCU, 1.8V-3.3V (depending on MCU).
+ vddio-supply:
+ description: |
+ Optional regulator that provides digital I/O voltage,
+ e.g. for pulling up the interrupt line or the I2C pins.
+
linux,keycodes:
minItems: 1
maxItems: 4
--
2.29.2
next prev parent reply other threads:[~2020-12-03 13:23 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-03 13:12 [PATCH 1/3] dt-bindings: Input: tm2-touchkey - convert to yaml Stephan Gerhold
2020-12-03 13:12 ` Stephan Gerhold [this message]
2020-12-05 23:09 ` [PATCH 2/3] dt-bindings: Input: tm2-touchkey - document vddio-supply Linus Walleij
2020-12-06 12:28 ` Stephan Gerhold
2020-12-06 15:10 ` Linus Walleij
2020-12-09 20:12 ` Rob Herring
2020-12-10 3:50 ` Dmitry Torokhov
2020-12-03 13:12 ` [PATCH 3/3] Input: tm2-touchkey - add vddio regulator Stephan Gerhold
2020-12-05 23:10 ` Linus Walleij
2020-12-10 3:51 ` Dmitry Torokhov
2020-12-05 23:08 ` [PATCH 1/3] dt-bindings: Input: tm2-touchkey - convert to yaml Linus Walleij
2020-12-09 20:12 ` Rob Herring
2020-12-10 3:50 ` Dmitry Torokhov
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