From patchwork Thu Aug 25 09:41:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sascha Hauer X-Patchwork-Id: 600118 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 12C84C04AA5 for ; Thu, 25 Aug 2022 09:41:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240634AbiHYJlu (ORCPT ); Thu, 25 Aug 2022 05:41:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47440 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240646AbiHYJlt (ORCPT ); Thu, 25 Aug 2022 05:41:49 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6CB16A598A for ; Thu, 25 Aug 2022 02:41:45 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oR9Ml-0006Vp-Mj; Thu, 25 Aug 2022 11:41:35 +0200 Received: from [2a0a:edc0:0:1101:1d::28] (helo=dude02.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1oR9Ml-001rxi-0O; Thu, 25 Aug 2022 11:41:35 +0200 Received: from sha by dude02.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1oR9Mj-006IWs-Re; Thu, 25 Aug 2022 11:41:33 +0200 From: Sascha Hauer To: linux-gpio@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Linus Walleij , Bartosz Golaszewski , kernel@pengutronix.de, Sascha Hauer Subject: [PATCH 2/2] dt-bindings: gpio: Add gpio-latch binding document Date: Thu, 25 Aug 2022 11:41:32 +0200 Message-Id: <20220825094132.1268174-3-s.hauer@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220825094132.1268174-1-s.hauer@pengutronix.de> References: <20220825094132.1268174-1-s.hauer@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: sha@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-gpio@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org This adds a binding for a GPIO multiplexer driver based on latches connected to other GPIOs. Signed-off-by: Sascha Hauer --- .../devicetree/bindings/gpio/gpio-latch.yaml | 83 +++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-latch.yaml diff --git a/Documentation/devicetree/bindings/gpio/gpio-latch.yaml b/Documentation/devicetree/bindings/gpio/gpio-latch.yaml new file mode 100644 index 0000000000000..0652c9d2130af --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-latch.yaml @@ -0,0 +1,83 @@ +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/gpio/gpio-latch.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: GPIO latch controller + +maintainers: + - Sascha Hauer + +description: | + This binding describes a GPIO multiplexer based on latches connected to + other GPIOs, like this: + + CLK0 ----------------------. ,--------. + CLK1 -------------------. `--------|> #0 | + | | | + OUT0 ----------------+--|-----------|D0 Q0|-----|< + OUT1 --------------+-|--|-----------|D1 Q1|-----|< + OUT2 ------------+-|-|--|-----------|D2 Q2|-----|< + OUT3 ----------+-|-|-|--|-----------|D3 Q3|-----|< + OUT4 --------+-|-|-|-|--|-----------|D4 Q4|-----|< + OUT5 ------+-|-|-|-|-|--|-----------|D5 Q5|-----|< + OUT6 ----+-|-|-|-|-|-|--|-----------|D6 Q6|-----|< + OUT7 --+-|-|-|-|-|-|-|--|-----------|D7 Q7|-----|< + | | | | | | | | | `--------' + | | | | | | | | | + | | | | | | | | | ,--------. + | | | | | | | | `-----------|> #1 | + | | | | | | | | | | + | | | | | | | `--------------|D0 Q0|-----|< + | | | | | | `----------------|D1 Q1|-----|< + | | | | | `------------------|D2 Q2|-----|< + | | | | `--------------------|D3 Q3|-----|< + | | | `----------------------|D4 Q4|-----|< + | | `------------------------|D5 Q5|-----|< + | `--------------------------|D6 Q6|-----|< + `----------------------------|D7 Q7|-----|< + `--------' + + The number of clk-gpios and data-gpios is not fixed. The actual number of + GPIOs used for clk and data are taken from the corresponding array lengths. + +properties: + compatible: + const: gpio-latch + "#gpio-cells": + const: 2 + + clk-gpios: + description: Array of GPIOs to be used to clock a latch + + data-gpios: + description: Array of GPIOs to be used as data GPIOs + + gpio-controller: true + + gpio-line-names: true + +required: + - compatible + - "#gpio-cells" + - gpio-controller + - clk-gpios + - data-gpios + +additionalProperties: false + +examples: + - | + gpio-latch { + #gpio-cells = <2>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_di_do_leds>; + compatible = "gpio-latch"; + gpio-controller; + + clk-gpios = <&gpio3 7 0>, <&gpio3 8 0>; + data-gpios = <&gpio3 21 0>, <&gpio3 22 0>, + <&gpio3 23 0>, <&gpio3 24 0>, + <&gpio3 25 0>, <&gpio3 26 0>, + <&gpio3 27 0>, <&gpio3 28 0>; + };