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[176.74.132.138]) by smtp.gmail.com with ESMTPSA id sb20-20020a170906edd400b0073dbaeb50f6sm15211659ejb.169.2023.01.04.05.34.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 Jan 2023 05:34:32 -0800 (PST) From: =?utf-8?q?Martin_Za=C5=A5ovi=C4=8D?= To: linux-kernel@vger.kernel.org Cc: devicetree@vger.kernel.org, mani@kernel.org, hemantk@codeaurora.org, quic_jhugo@quicinc.com, andersson@kernel.org, Michael.Srba@seznam.cz, arnd@arndb.de, dipenp@nvidia.com, bvanassche@acm.org, iwona.winiarska@intel.com, ogabbay@kernel.org, tzimmermann@suse.de, fmdefrancesco@gmail.com, jason.m.bills@linux.intel.com, jae.hyun.yoo@linux.intel.com, gregkh@linuxfoundation.org, krzysztof.kozlowski+dt@linaro.org, robh+dt@kernel.org, =?utf-8?q?Martin_Za?= =?utf-8?q?=C5=A5ovi=C4=8D?= Subject: [PATCH 1/3] dt-bindings: add Wiegand controller dt-binding documentation Date: Wed, 4 Jan 2023 14:34:12 +0100 Message-Id: <20230104133414.39305-2-m.zatovic1@gmail.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230104133414.39305-1-m.zatovic1@gmail.com> References: <20230104133414.39305-1-m.zatovic1@gmail.com> MIME-Version: 1.0 X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_ENVFROM_END_DIGIT, FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1754100023375300113?= X-GMAIL-MSGID: =?utf-8?q?1754100023375300113?= A Weigand bus is defined by a Wiegand controller node. This node can contain one or more device nodes for devices attached to the controller(it is advised to only connect one device as Wiegand is a point-to-point bus). Wiegand controller needs to specify several attributes such as the pulse length in order to function properly. These attributes are documented here. Signed-off-by: Martin Zaťovič --- .../bindings/wiegand/wiegand-controller.yaml | 83 +++++++++++++++++++ MAINTAINERS | 5 ++ 2 files changed, 88 insertions(+) create mode 100644 Documentation/devicetree/bindings/wiegand/wiegand-controller.yaml diff --git a/Documentation/devicetree/bindings/wiegand/wiegand-controller.yaml b/Documentation/devicetree/bindings/wiegand/wiegand-controller.yaml new file mode 100644 index 000000000000..645306c65d43 --- /dev/null +++ b/Documentation/devicetree/bindings/wiegand/wiegand-controller.yaml @@ -0,0 +1,83 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/wiegand/wiegand-controller.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Wiegand Controller Generic Binding + +maintainers: + - Martin Zaťovič + +description: | + Wiegand busses can be described with a node for the Wiegand controller device + and a set of child nodes for each SPI slave on the bus. + +properties: + $nodename: + pattern: "^wiegand(@.*|-[0-9a-f])*$" + + compatible: + maxItems: 1 + description: Compatible of the Wiegand controller. + + data-high-gpios: + maxItems: 1 + description: GPIO used as Wiegands data-hi line. This line is initially + pulled up to high value. Wiegand write of a bit of value 1 results in + this line being pulled down for pulse length duration. + + data-lo-gpios: + maxItems: 1 + description: GPIO used as Wiegands data-lo line. This line is initially + pulled up to high value. Wiegand write of a bit of value 0 results in + this line being pulled down for pulse length duration. + + pulse-len-us: + maxItems: 1 + description: Length of the low pulse in microseconds. + + interval-len-us: + maxItems: 1 + description: Length of a whole bit (both the pulse and the high phase) + in microseconds. + + frame-gap-us: + maxItems: 1 + description: Length of the last bit of a frame (both the pulse and the + high phase) in microseconds. + + slave-device: + type: object + + properties: + compatible: + description: + Compatible of the Wiegand device. + + required: + - compatible + +required: + - compatible + - pulse-len-us + - interval-len-us + - frame-gap-us + +additionalProperties: false + +examples: + - | + wiegand@f00 { + compatible = "wiegand-gpio"; + data-hi-gpios = <&gpio2 7 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>; + data-lo-gpios = <&gpio2 6 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>; + pulse-len-us = <50>; + interval-len-us = <2000>; + frame-gap-us = <2000>; + status = "okay"; + + wiegand-foo-device { + compatible = "wiegand-foo"; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 7f86d02cb427..db9624d93af0 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -22428,6 +22428,11 @@ L: linux-input@vger.kernel.org S: Maintained F: drivers/hid/hid-wiimote* +WIEGAND BUS DRIVER +M: Martin Zaťovič +S: Maintained +F: Documentation/devicetree/bindings/wiegand/wiegand-controller.yaml + WILOCITY WIL6210 WIRELESS DRIVER L: linux-wireless@vger.kernel.org S: Orphan