From patchwork Tue Jun 14 19:51:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Boyd X-Patchwork-Id: 12881531 Received: from mail-pj1-f43.google.com (mail-pj1-f43.google.com [209.85.216.43]) (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 7FCE01FCF for ; Tue, 14 Jun 2022 19:51:49 +0000 (UTC) Received: by mail-pj1-f43.google.com with SMTP id o33-20020a17090a0a2400b001ea806e48c6so10048365pjo.1 for ; Tue, 14 Jun 2022 12:51:49 -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=uFpx1Q0R2DpaKD6mD/gHjLIZ6up40Rho6ckm9fm3ycc=; b=YsEOcKJ2Tzv+ZILzotF2aDfZqlxHIEm30HGq42foESPn7BvAuSx1zAlCATMGScuHbu VCw55LLcAb7p4aUkUdzsUo2Ed1LCO+OUvO7jbWGFMsQcolT2POJH4A9coIl1fjjLJBbY /SyPSAXTeUqpboks7CBNn3mGcnHRu8Kfh+Z4c= 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=uFpx1Q0R2DpaKD6mD/gHjLIZ6up40Rho6ckm9fm3ycc=; b=wuqNLKnZgpqK4HPN0j+MssmxMFE9o0ZJ1B4iCX38QXXE7qwWDFAolSovDqCyklXPHj 2odPEF0Y6QgZ6z1iynI7OYF7j9rsOYRz1XiNrQa9QyRVpzysrHVbWjOQUXjELTtqu3FT v2den1xMkBiKD+Jb/bd6lNt/2ftffNHSklfnC5VOeM3hzU7TF38aZnXqRceLBJXrcBZi J7u1fpqQn4ARuKxNMpek/gM+smhpmpDonIFpQdbWY8arbQVZYHbmPGqsNlgLGZSHkXiW ngD67J596eve8KpZJY90HOITrrOKiOeBVTXv5oWUMEN1KKV9dEyyEPrnriz6f5I5vmpj nUOg== X-Gm-Message-State: AJIora/6d/2unTgaW/lpiHDAHOpAtQg4T1FJsXfDUV7LzgfES2VSyqXo gHpWaEPxYxPiQk1nN/ZlogLM9A== X-Google-Smtp-Source: AGRyM1tlKHQcOg674ko2y7XUMi9PndsR1Xg83asVlu4KMPxtYZf3pNCemwmM2SlhRYKjweoMK2HDnA== X-Received: by 2002:a17:902:d504:b0:167:756a:f992 with SMTP id b4-20020a170902d50400b00167756af992mr6028030plg.160.1655236309017; Tue, 14 Jun 2022 12:51:49 -0700 (PDT) Received: from smtp.gmail.com ([2620:15c:202:201:82ae:1136:b202:95da]) by smtp.gmail.com with ESMTPSA id s21-20020a170902b19500b0015e8d4eb29csm7625484plr.230.2022.06.14.12.51.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Jun 2022 12:51:48 -0700 (PDT) From: Stephen Boyd To: Benson Leung Cc: linux-kernel@vger.kernel.org, patches@lists.linux.dev, Rob Herring , Krzysztof Kozlowski , devicetree@vger.kernel.org, chrome-platform@lists.linux.dev, Guenter Roeck , Douglas Anderson , Craig Hesling , Tom Hughes , Alexandru M Stan , Tzung-Bi Shih , Matthias Kaehlcke , Lee Jones Subject: [PATCH v6 2/2] dt-bindings: cros-ec: Add ChromeOS fingerprint binding Date: Tue, 14 Jun 2022 12:51:44 -0700 Message-Id: <20220614195144.2794796-3-swboyd@chromium.org> X-Mailer: git-send-email 2.36.1.476.g0c4daa206d-goog In-Reply-To: <20220614195144.2794796-1-swboyd@chromium.org> References: <20220614195144.2794796-1-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 Chromebooks with a fingerprint sensor. Previously we've been describing this with the google,cros-ec-spi binding but it lacks gpio and regulator control used during firmware flashing. Cc: Rob Herring Cc: Krzysztof Kozlowski Cc: Cc: Cc: Guenter Roeck Cc: Douglas Anderson Cc: Craig Hesling Cc: Tom Hughes Cc: Alexandru M Stan Cc: Tzung-Bi Shih Cc: Matthias Kaehlcke Cc: Benson Leung Cc: Lee Jones Signed-off-by: Stephen Boyd --- .../bindings/chrome/google,cros-ec-fp.yaml | 97 +++++++++++++++++++ .../bindings/mfd/google,cros-ec.yaml | 9 ++ 2 files changed, 106 insertions(+) create mode 100644 Documentation/devicetree/bindings/chrome/google,cros-ec-fp.yaml diff --git a/Documentation/devicetree/bindings/chrome/google,cros-ec-fp.yaml b/Documentation/devicetree/bindings/chrome/google,cros-ec-fp.yaml new file mode 100644 index 000000000000..48c02bd4585c --- /dev/null +++ b/Documentation/devicetree/bindings/chrome/google,cros-ec-fp.yaml @@ -0,0 +1,97 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/chrome/google,cros-ec-fp.yaml# +$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 + +select: + properties: + compatible: + contains: + const: google,cros-ec-spi + required: + - compatible + - boot0-gpios + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + +properties: + compatible: + items: + - const: google,cros-ec-fp + - const: google,cros-ec-spi + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + controller-data: true + + 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. + $ref: /schemas/types.yaml#/definitions/uint32 + default: 0 + + google,cros-ec-spi-msg-delay: + description: + This property specifies the delay in usecs between messages. + $ref: /schemas/types.yaml#/definitions/uint32 + default: 0 + + spi-max-frequency: + maximum: 3000000 + + reset-gpios: + maxItems: 1 + + boot0-gpios: + maxItems: 1 + description: Assert for bootloader mode. + + vdd-supply: true + +required: + - compatible + - reg + - interrupts + - reset-gpios + - boot0-gpios + - vdd-supply + +additionalProperties: false + +examples: + - | + #include + #include + spi0 { + #address-cells = <0x1>; + #size-cells = <0x0>; + + ec@0 { + compatible = "google,cros-ec-fp", "google,cros-ec-spi"; + reg = <0x0>; + interrupt-parent = <&gpio_controller>; + interrupts = <4 IRQ_TYPE_LEVEL_LOW>; + spi-max-frequency = <3000000>; + reset-gpios = <&gpio_controller 5 GPIO_ACTIVE_LOW>; + boot0-gpios = <&gpio_controller 10 GPIO_ACTIVE_HIGH>; + vdd-supply = <&pp3300_fp_mcu>; + }; + }; +... diff --git a/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml b/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml index 178e26ab115c..a7453bbd7bed 100644 --- a/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml +++ b/Documentation/devicetree/bindings/mfd/google,cros-ec.yaml @@ -10,6 +10,15 @@ maintainers: - Benson Leung - Guenter Roeck +select: + properties: + compatible: + contains: + const: google,cros-ec-spi + boot0-gpios: false + required: + - compatible + description: Google's ChromeOS EC is a microcontroller which talks to the AP and implements various functions such as keyboard and battery charging.