linux-kernel - [PATCH 1/2] devicetree: power: add bindings for GPIO-driven power switches

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Date:   Sun, 11 Dec 2016 23:21:44 +0100
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Kevin Hilman <khilman@...libre.com>,
        Patrick Titiano <ptitiano@...libre.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Courbot <gnurou@...il.com>,
        linux-gpio@...r.kernel.org, Sebastian Reichel <sre@...nel.org>,
        linux-pm@...r.kernel.org, Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH 1/2] devicetree: power: add bindings for GPIO-driven power switches

Some boards are equipped with simple, GPIO-driven power load switches.
An example of such ICs is the TI tps229* series.

Add device tree bindings allowing to describe them.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
---
 .../bindings/power/gpio-power-switch.txt           | 25 ++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/gpio-power-switch.txt

diff --git a/Documentation/devicetree/bindings/power/gpio-power-switch.txt b/Documentation/devicetree/bindings/power/gpio-power-switch.txt
new file mode 100644
index 0000000..21420ed
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/gpio-power-switch.txt
@@ -0,0 +1,25 @@
+GPIO Power Switch
+-----------------
+
+This is the device tree binding for simple, GPIO-driven power load switches
+that do not have any control signals.
+
+Required properties:
+
+- compatible:           must be "gpio-power-switch"
+- power-gpios:          phandle for the GPIO driving the power load switch
+
+Optional properties:
+
+- power-switch-name:    the name of the power switch
+- power-switch-on:      the power switch GPIO is driven high by default
+
+Example
+-------
+
+acme_probe0_power_switch: gpio_power_switch@0 {
+	compatible = "gpio-power-switch";
+	power-switch-name = "acme_probe0_switch";
+	power-gpios = <&pca9535 1 GPIO_ACTIVE_HIGH>;
+	power-switch-on;
+};
-- 
2.9.3