From patchwork Mon Mar 14 23:22:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Boyd X-Patchwork-Id: 12780873 Received: from mail-pf1-f178.google.com (mail-pf1-f178.google.com [209.85.210.178]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4BBAD7479 for ; Mon, 14 Mar 2022 23:22:18 +0000 (UTC) Received: by mail-pf1-f178.google.com with SMTP id d19so9360165pfv.7 for ; Mon, 14 Mar 2022 16:22:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ZyWdovKVVCckXPMjkBj5HOPvtLszaKccs4KJAJEq75c=; b=gd/mpRXNZIF2VJdhjrLi5gZn3MaoHKTxbzU32xOXPIrp3qJNtVn6dQJgNfe7YX2j3a 0g6yWNRohfn/hYKnCPTBUKRaBDmFmuo4rg5wBkDIZUcGmLJkulgryIjlY7jlcImn5fje 0yHTrpHkUEFXVtaPZcvTQVA1k3hFk9UNtXfCQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ZyWdovKVVCckXPMjkBj5HOPvtLszaKccs4KJAJEq75c=; b=5jrVnxz63jA7hPBvDtiMwMg7OrfnaEbKT2ueDY5D7mUY5xFuo4qFHxFXVBdfVTX647 cypbfFBGIV/mU4uuIEu4mKJk1JirZ8rIk5RvZxwTN7qc+XPc9ijd6uyFbCtHQPPol93s MA/t7XvVHdHQ8VqBdKkkqfI3G49aZQSsp1E72pzwIzaZkhJJfcqIzT+2PVmOvUfhinCk K148bYMgSUtPhzZYcvBrWjJu1XG0Dxzx2HYmBu3zF5+C5OcWB1eXuexw7sLjrHJP22Hv B1J8fR39wE75k/f2T62Jy8FXgmiK6IeuzpKMV7BPty1LAweevxwOusnW+VQwmNZ18l6R l4gQ== X-Gm-Message-State: AOAM532XXgZdiYBNTyOGwiXRYnQ6QGx5X+KCcbSch8yJ6bABQNN3GDtX dWnvjscly1e1/hTmd9z3UPLWMA== X-Google-Smtp-Source: ABdhPJyue0rrmnVO9lVVYRhVoQVCMl+3aMPwsv3nWUscpquVVlGIatiElmPKoYdE5bfjygLAnc8Xog== X-Received: by 2002:a05:6a00:1ac7:b0:4f7:442d:a5cb with SMTP id f7-20020a056a001ac700b004f7442da5cbmr25805567pfv.42.1647300137761; Mon, 14 Mar 2022 16:22:17 -0700 (PDT) Received: from smtp.gmail.com ([2620:15c:202:201:c7b4:6b67:b9a2:ab68]) by smtp.gmail.com with ESMTPSA id y20-20020aa78054000000b004f6f267dcc9sm20759886pfm.187.2022.03.14.16.22.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Mar 2022 16:22:17 -0700 (PDT) From: Stephen Boyd To: Benson Leung Cc: linux-kernel@vger.kernel.org, chrome-platform@lists.linux.dev, Rob Herring , devicetree@vger.kernel.org, Guenter Roeck , Douglas Anderson , Craig Hesling , Tom Hughes , Alexandru M Stan Subject: [PATCH 1/2] dt-bindings: mfd: Add ChromeOS fingerprint binding Date: Mon, 14 Mar 2022 16:22:13 -0700 Message-Id: <20220314232214.4183078-2-swboyd@chromium.org> X-Mailer: git-send-email 2.35.1.723.g4982287a31-goog In-Reply-To: <20220314232214.4183078-1-swboyd@chromium.org> References: <20220314232214.4183078-1-swboyd@chromium.org> Precedence: bulk X-Mailing-List: chrome-platform@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add a binding to describe the fingerprint processor found on Chromeboks with a fingerprint sensor. Cc: Rob Herring Cc: Cc: Guenter Roeck Cc: Douglas Anderson Cc: Craig Hesling Cc: Tom Hughes Cc: Alexandru M Stan Signed-off-by: Stephen Boyd --- .../bindings/mfd/google,cros-ec-fp.yaml | 89 +++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/google,cros-ec-fp.yaml diff --git a/Documentation/devicetree/bindings/mfd/google,cros-ec-fp.yaml b/Documentation/devicetree/bindings/mfd/google,cros-ec-fp.yaml new file mode 100644 index 000000000000..05d2b2b9b713 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/google,cros-ec-fp.yaml @@ -0,0 +1,89 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/google,cros-ec-fp.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ChromeOS Embedded Fingerprint Controller + +description: + Google's ChromeOS embedded fingerprint controller is a device which + implements fingerprint functionality such as unlocking a Chromebook + without typing a password. + +maintainers: + - Tom Hughes + +properties: + compatible: + const: google,cros-ec-fp + + reg: + maxItems: 1 + + spi-max-frequency: + maximum: 3000000 + + interrupts: + maxItems: 1 + + reset-gpios: + maxItems: 1 + description: reset signal (active low). + + boot0-gpios: + maxItems: 1 + description: boot signal (low for normal boot; high for bootloader). + + vdd-supply: + description: Power supply for the fingerprint controller. + + google,cros-ec-spi-pre-delay: + description: + This property specifies the delay in usecs between the + assertion of the CS and the first clock pulse. + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + - default: 0 + - minimum: 0 + + google,cros-ec-spi-msg-delay: + description: + This property specifies the delay in usecs between messages. + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + - default: 0 + - minimum: 0 + +required: + - compatible + - reg + - interrupts + - reset-gpios + - boot0-gpios + - vdd-supply + - spi-max-frequency + +additionalProperties: false + +examples: + - | + #include + #include + spi { + #address-cells = <0x1>; + #size-cells = <0x0>; + ec@0 { + compatible = "google,cros-ec-fp"; + reg = <0>; + interrupt-parent = <&gpio_controller>; + interrupts = <4 IRQ_TYPE_LEVEL_LOW>; + spi-max-frequency = <3000000>; + google,cros-ec-spi-msg-delay = <37>; + google,cros-ec-spi-pre-delay = <5>; + reset-gpios = <&gpio_controller 5 GPIO_ACTIVE_LOW>; + boot0-gpios = <&gpio_controller 10 GPIO_ACTIVE_LOW>; + vdd-supply = <&pp3300_fp_mcu>; + }; + }; +...