From nobody Tue Dec 16 21:54:35 2025 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.153.233]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6581E1B7FA; Tue, 16 Jan 2024 11:39:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=microchip.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=microchip.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b="VjpXUHqZ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1705405162; x=1736941162; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=F049DA0zYoCg3AHntkr9QbFbh+gCxVuUZu3XbwhuI7Q=; b=VjpXUHqZsLFTwZOnNy6O26g4MKdU34EoI68DfIO1C6nNqkjkvUTEzH53 tW+/sRfRIEnvwkpYpz6Ilz1aWYbK1MKv4GtF2thpOD+ezqWdt+O4VW62T JN8ic5MFYskD4QAXTYSzJ9F6aBMWEJbDemSrk5nwqmoH/Su6GB/+I1Ve+ MrIzAk35JquJROIM5tIbpZQJ52L3IEfYrIoyO4+SGggnS445ETE1korY1 xUAiw3jyHDrbuZADMNHhA26AuYJg0Wynn6YuBASOUi1vAz+MW2kX5DY21 rvx75FTvJE82kw2rmlO7vDTPtK4f6OW2Pmnm+04SBKnR3xkWXi5kSje77 g==; X-CSE-ConnectionGUID: m9+TCx76QtaEOtm0pEMV+w== X-CSE-MsgGUID: QDaawgEuT+Gvc4nhuwwnDQ== X-IronPort-AV: E=Sophos;i="6.05,199,1701154800"; d="scan'208";a="245533630" X-Amp-Result: SKIPPED(no attachment in message) Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa5.microchip.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 16 Jan 2024 04:39:20 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Tue, 16 Jan 2024 04:38:39 -0700 Received: from che-lt-i70843lx.amer.actel.com (10.10.85.11) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server id 15.1.2507.35 via Frontend Transport; Tue, 16 Jan 2024 04:38:26 -0700 From: Dharma Balasubiramani To: , , , , , , , , , , , , , , , , , , , , , CC: , Dharma Balasubiramani Subject: [PATCH v2 1/3] dt-bindings: display: convert Atmel's HLCDC to DT schema Date: Tue, 16 Jan 2024 17:07:58 +0530 Message-ID: <20240116113800.82529-2-dharma.b@microchip.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240116113800.82529-1-dharma.b@microchip.com> References: <20240116113800.82529-1-dharma.b@microchip.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Convert the existing DT binding to DT schema of the Atmel's HLCDC display controller. Signed-off-by: Dharma Balasubiramani --- changelog v1 -> v2 - Remove the explicit copyrights. - Modify filename like compatible. - Modify title (drop words like binding/driver). - Modify description actually describing the hardware and not the driver. - Remove pinctrl properties which aren't required. - Ref endpoint and not endpoint-base. - Drop redundant info about bus-width description and add ref to video-inte= rfaces. - Move 'additionalProperties' after 'Required'. - Drop parent node and it's other sub-device node which are not related her= e. - Add compatible to example 2 and add comments that bus-width is the diff b= etween two examples. --- .../atmel/atmel,hlcdc-display-controller.yaml | 110 ++++++++++++++++++ .../bindings/display/atmel/hlcdc-dc.txt | 75 ------------ 2 files changed, 110 insertions(+), 75 deletions(-) create mode 100644 Documentation/devicetree/bindings/display/atmel/atmel,h= lcdc-display-controller.yaml delete mode 100644 Documentation/devicetree/bindings/display/atmel/hlcdc-d= c.txt diff --git a/Documentation/devicetree/bindings/display/atmel/atmel,hlcdc-di= splay-controller.yaml b/Documentation/devicetree/bindings/display/atmel/atm= el,hlcdc-display-controller.yaml new file mode 100644 index 000000000000..f022c294cfbc --- /dev/null +++ b/Documentation/devicetree/bindings/display/atmel/atmel,hlcdc-display-c= ontroller.yaml @@ -0,0 +1,110 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/atmel/atmel,hlcdc-display-contr= oller.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Atmel's High LCD Controller (HLCDC) + +maintainers: + - Nicolas Ferre + - Alexandre Belloni + - Claudiu Beznea + +description: | + The LCD Controller (LCDC) consists of logic for transferring LCD image + data from an external display buffer to a TFT LCD panel. The LCDC has one + display input buffer per layer that fetches pixels through the single bus + host interface and a look-up table to allow palletized display + configurations. + +properties: + compatible: + const: atmel,hlcdc-display-controller + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + port@0: + $ref: /schemas/graph.yaml#/$defs/port-base + unevaluatedProperties: false + description: + Output endpoint of the controller, connecting the LCD panel signals. + + properties: + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + reg: + maxItems: 1 + + endpoint: + $ref: /schemas/graph.yaml#/$defs/endpoint + unevaluatedProperties: false + description: + Endpoint connecting the LCD panel signals. + + properties: + bus-width: + description: Endpoint bus width. + $ref: /schemas/media/video-interfaces.yaml# + enum: [ 12, 16, 18, 24 ] + +required: + - '#address-cells' + - '#size-cells' + - compatible + - port@0 + +additionalProperties: false + +examples: + - | + //Example 1 + + display-controller { + compatible =3D "atmel,hlcdc-display-controller"; + pinctrl-names =3D "default"; + pinctrl-0 =3D <&pinctrl_lcd_base &pinctrl_lcd_rgb888>; + #address-cells =3D <1>; + #size-cells =3D <0>; + + port@0 { + #address-cells =3D <1>; + #size-cells =3D <0>; + reg =3D <0>; + + hlcdc_panel_output: endpoint@0 { + reg =3D <0>; + remote-endpoint =3D <&panel_input>; + }; + }; + }; + + - | + //Example 2 With a video interface override to force rgb565, bus-width= =3D16 + + display-controller { + compatible =3D "atmel,hlcdc-display-controller"; + pinctrl-names =3D "default"; + pinctrl-0 =3D <&pinctrl_lcd_base &pinctrl_lcd_rgb565>; + #address-cells =3D <1>; + #size-cells =3D <0>; + + port@0 { + #address-cells =3D <1>; + #size-cells =3D <0>; + reg =3D <0>; + hlcdc_panel_output2: endpoint@0 { + reg =3D <0>; + remote-endpoint =3D <&panel_input>; + bus-width =3D <16>; + }; + }; + }; diff --git a/Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt b= /Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt deleted file mode 100644 index 923aea25344c..000000000000 --- a/Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt +++ /dev/null @@ -1,75 +0,0 @@ -Device-Tree bindings for Atmel's HLCDC (High LCD Controller) DRM driver - -The Atmel HLCDC Display Controller is subdevice of the HLCDC MFD device. -See ../../mfd/atmel-hlcdc.txt for more details. - -Required properties: - - compatible: value should be "atmel,hlcdc-display-controller" - - pinctrl-names: the pin control state names. Should contain "default". - - pinctrl-0: should contain the default pinctrl states. - - #address-cells: should be set to 1. - - #size-cells: should be set to 0. - -Required children nodes: - Children nodes are encoding available output ports and their connections - to external devices using the OF graph representation (see ../graph.txt). - At least one port node is required. - -Optional properties in grandchild nodes: - Any endpoint grandchild node may specify a desired video interface - according to ../../media/video-interfaces.txt, specifically - - bus-width: recognized values are <12>, <16>, <18> and <24>, and - override any output mode selection heuristic, forcing "rgb444", - "rgb565", "rgb666" and "rgb888" respectively. - -Example: - - hlcdc: hlcdc@f0030000 { - compatible =3D "atmel,sama5d3-hlcdc"; - reg =3D <0xf0030000 0x2000>; - interrupts =3D <36 IRQ_TYPE_LEVEL_HIGH 0>; - clocks =3D <&lcdc_clk>, <&lcdck>, <&clk32k>; - clock-names =3D "periph_clk","sys_clk", "slow_clk"; - - hlcdc-display-controller { - compatible =3D "atmel,hlcdc-display-controller"; - pinctrl-names =3D "default"; - pinctrl-0 =3D <&pinctrl_lcd_base &pinctrl_lcd_rgb888>; - #address-cells =3D <1>; - #size-cells =3D <0>; - - port@0 { - #address-cells =3D <1>; - #size-cells =3D <0>; - reg =3D <0>; - - hlcdc_panel_output: endpoint@0 { - reg =3D <0>; - remote-endpoint =3D <&panel_input>; - }; - }; - }; - - hlcdc_pwm: hlcdc-pwm { - compatible =3D "atmel,hlcdc-pwm"; - pinctrl-names =3D "default"; - pinctrl-0 =3D <&pinctrl_lcd_pwm>; - #pwm-cells =3D <3>; - }; - }; - -Example 2: With a video interface override to force rgb565; as above -but with these changes/additions: - - &hlcdc { - hlcdc-display-controller { - pinctrl-names =3D "default"; - pinctrl-0 =3D <&pinctrl_lcd_base &pinctrl_lcd_rgb565>; - - port@0 { - hlcdc_panel_output: endpoint@0 { - bus-width =3D <16>; - }; - }; - }; - }; --=20 2.25.1