From patchwork Mon Jun 19 15:59:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 13284787 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 E0EB3C0015E for ; Mon, 19 Jun 2023 16:00:16 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1CD6A10E0A3; Mon, 19 Jun 2023 16:00:12 +0000 (UTC) Received: from relay8-d.mail.gandi.net (relay8-d.mail.gandi.net [217.70.183.201]) by gabe.freedesktop.org (Postfix) with ESMTPS id D4F1A10E133 for ; Mon, 19 Jun 2023 16:00:05 +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=1687190404; 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=ZVUzYNK+7sbh2q7WBtob0P71hT2E9rlyk6vugFQoNpY=; b=Y4l3+yUOQykuCzo+vU+xw529bZRclt7eFIRF8OpfIjde9VVogH+p5HSLe1WZGGvg436lAJ ScaulGKAg2ufZgCtYVrAO5mC8GlwZBjsPRstxW/E6CB8cXC20NpY1RfuLDhwC8fX9QsQ8x xKjn04eBWBa7aFs55wzUD9U8RUdU3MIXzv4CJXdS40sr0r+74o6LByXQCMdjCd437r21m2 vtzYY53rrdHz2yrRD4G491WzCtw6pMo5swgzHaFxfBSjJjvVK846uAk4z7Lsc930mTCa/G qgp97GMihq9ePd1iE41DKgfA1BqiF+Yg9RMFss6f6t9gIogI4CE8KQQPPQ1deQ== 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 6C44A1BF205; Mon, 19 Jun 2023 16:00:01 +0000 (UTC) From: Miquel Raynal To: David Airlie , Daniel Vetter , Thierry Reding , Sam Ravnborg , dri-devel@lists.freedesktop.org Subject: [PATCH v3 2/6] dt-bindings: display: st7789v: bound the number of Rx data lines Date: Mon, 19 Jun 2023 17:59:54 +0200 Message-Id: <20230619155958.3119181-3-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230619155958.3119181-1-miquel.raynal@bootlin.com> References: <20230619155958.3119181-1-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, Krzysztof Kozlowski , Krzysztof Kozlowski , Rob Herring , Maxime Ripard , Thomas Petazzoni , Miquel Raynal 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