From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrey Smirnov Subject: [PATCH v2 10/10] bindings: gpio-sx150x: Document new bindings Date: Wed, 19 Oct 2016 07:04:06 -0700 Message-ID: <1476885846-16469-11-git-send-email-andrew.smirnov@gmail.com> References: <1476885846-16469-1-git-send-email-andrew.smirnov@gmail.com> Return-path: In-Reply-To: <1476885846-16469-1-git-send-email-andrew.smirnov@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: linux-gpio@vger.kernel.org Cc: Linus Walleij , Alexandre Courbot , Rob Herring , Mark Rutland , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, cphealy@gmail.com, Andrey Smirnov List-Id: linux-gpio@vger.kernel.org This patch documents the conversion of various platform data options that used to be availible to SX150x driver to device tree/OF form. Signed-off-by: Andrey Smirnov --- .../devicetree/bindings/gpio/gpio-sx150x.txt | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt b/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt index c809acb..e96b554 100644 --- a/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt +++ b/Documentation/devicetree/bindings/gpio/gpio-sx150x.txt @@ -26,6 +26,35 @@ The GPIO expander can optionally be used as an interrupt controller, in which case it uses the default two cell specifier as described in Documentation/devicetree/bindings/interrupt-controller/interrupts.txt. +Optional properties: + +- semtech,io-polarity: A bit-mask which enables polarity inversion for + each IO line in the expander. Setting the bit + at position n inverts the polarity of that IO + line, while clearing it results in normal + polarity. For chips with fewer than 16 IO pins, + high-end bits are ignored. + +- semtech,io-pullup: +- semtech,io-pulldown: A bit-mask which enables-or disables the + pull-up (pull-down) resistor for each IO line + in the expander. Setting the bit at position n + will enable the pull-down for the IO at the + corresponding offset. For chips with fewer + than 16 IO pins, high-end bits are ignored. + +- semtech,reset-during-probe: Boolean, if true, the driver will + trigger a full reset of the chip at the + beginning of the probe in order to place + it in a known state. + +- semtech,oscio-is-gpo: Boolean, if set to true, the driver will + configure OSCIO as a GPO instead of as an + oscillator, increasing the size of the GP(I)O + pool created by this expander by one. The + output-only GPO pin will be added at the end + of the block. + Example: i2c_gpio_expander@20{ -- 2.5.5