From patchwork Fri Jun 16 16:32:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 13282988 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B14F6EB64D7 for ; Fri, 16 Jun 2023 16:33:16 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7F9B910E658; Fri, 16 Jun 2023 16:33:15 +0000 (UTC) Received: from relay6-d.mail.gandi.net (relay6-d.mail.gandi.net [217.70.183.198]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2536410E655 for ; Fri, 16 Jun 2023 16:33:03 +0000 (UTC) X-GND-Sasl: miquel.raynal@bootlin.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1686933181; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ef50bm+GONHI864NuxeDlYCMC7V2n7+LOBkBBONFzbE=; b=D1UHySufvnJTV2BP3z9GvROABhCgsmpc0Q0bsM9+Jsn3gKQZ3zkx8XngQNXlKHygHaOJ6b bBikA0etagF2TNJWpBBCbycV6Kz6ciyLRf8zInkGFkUdF2+TB6joaSAUyeVKqrskOqRAsn Iq0z1xiGMsjbt2P1lYfzEsiApuS15ADUP/+YHZqxMEx0wNvOfG/nUmHGFMrDlq/eIdWKtq 6A11v4BNYCZvhx7S3rIRr/8h4LUte33rGpl3PWcim9w7hTt878rJajICcYZzIRIXJowUf5 0tQggrBPRdw16pBNyiUbKIh75tJCT53XJ1HBUloWdRwiTuDT9GzCdBl7TcTTHg== X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com Received: by mail.gandi.net (Postfix) with ESMTPSA id A016AC0009; Fri, 16 Jun 2023 16:33:00 +0000 (UTC) From: Miquel Raynal To: David Airlie , Daniel Vetter , Thierry Reding , Sam Ravnborg , dri-devel@lists.freedesktop.org Subject: [PATCH v2 2/6] dt-bindings: display: st7789v: bound the number of Rx data lines Date: Fri, 16 Jun 2023 18:32:51 +0200 Message-Id: <20230616163255.2804163-3-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230616163255.2804163-1-miquel.raynal@bootlin.com> References: <20230616163255.2804163-1-miquel.raynal@bootlin.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Thomas Petazzoni , Sebastian Reichel , Rob Herring , Maxime Ripard , Krzysztof Kozlowski , Miquel Raynal , Michael Riesch Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The ST7789V LCD controller supports regular SPI wiring, as well as no Rx data line at all. The operating system needs to know whether it can read registers from the device or not. Let's detail this specific design possibility by bounding the spi-rx-bus-width property. Signed-off-by: Miquel Raynal Acked-by: Krzysztof Kozlowski --- .../devicetree/bindings/display/panel/sitronix,st7789v.yaml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml b/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml index 0ccf0487fd8e..a25df7e1df88 100644 --- a/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml +++ b/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml @@ -29,6 +29,10 @@ properties: spi-cpha: true spi-cpol: true + spi-rx-bus-width: + minimum: 0 + maximum: 1 + required: - compatible - reg