From patchwork Mon Oct 12 17:04:17 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen-Yu Tsai X-Patchwork-Id: 529242 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 4F677140D8F for ; Tue, 13 Oct 2015 04:05:37 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751790AbbJLREj (ORCPT ); Mon, 12 Oct 2015 13:04:39 -0400 Received: from smtp.csie.ntu.edu.tw ([140.112.30.61]:40525 "EHLO smtp.csie.ntu.edu.tw" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751652AbbJLREh (ORCPT ); Mon, 12 Oct 2015 13:04:37 -0400 Received: from mirror2.csie.ntu.edu.tw (mirror2.csie.ntu.edu.tw [140.112.30.76]) (Authenticated sender: b93043) by smtp.csie.ntu.edu.tw (Postfix) with ESMTPSA id 506A720443; Tue, 13 Oct 2015 01:04:35 +0800 (CST) Received: by mirror2.csie.ntu.edu.tw (Postfix, from userid 1000) id 201925F73D; Tue, 13 Oct 2015 01:04:35 +0800 (CST) From: Chen-Yu Tsai To: Hans de Goede , Jean-Christophe Plagniol-Villard , Tomi Valkeinen , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala Cc: Maxime Ripard , Chen-Yu Tsai , linux-fbdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Mark Brown Subject: [PATCH RFC 1/2] dt-bindings: simplefb: Support a list of regulator supply properties Date: Tue, 13 Oct 2015 01:04:17 +0800 Message-Id: <1444669458-5588-2-git-send-email-wens@csie.org> X-Mailer: git-send-email 2.5.3 In-Reply-To: <1444669458-5588-1-git-send-email-wens@csie.org> References: <1444669458-5588-1-git-send-email-wens@csie.org> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The physical display tied to the framebuffer may have regulators providing power to it, such as power for LCDs or interface conversion chips. The number of regulators in use may vary, but the regulator supply binding can not be a list. Work around this by adding a "num-supplies" property to communicate the number of supplies, and a list of 0 ~ N "vinN-supply" properties for the actual regulator supply. Signed-off-by: Chen-Yu Tsai --- .../devicetree/bindings/video/simple-framebuffer.txt | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/Documentation/devicetree/bindings/video/simple-framebuffer.txt b/Documentation/devicetree/bindings/video/simple-framebuffer.txt index 4474ef6e0b95..0cc43e1be8b5 100644 --- a/Documentation/devicetree/bindings/video/simple-framebuffer.txt +++ b/Documentation/devicetree/bindings/video/simple-framebuffer.txt @@ -47,10 +47,14 @@ Required properties: - a8b8g8r8 (32-bit pixels, d[31:24]=a, d[23:16]=b, d[15:8]=g, d[7:0]=r). Optional properties: -- clocks : List of clocks used by the framebuffer. Clocks listed here - are expected to already be configured correctly. The OS must - ensure these clocks are not modified or disabled while the - simple framebuffer remains active. +- clocks : List of clocks used by the framebuffer. +- num-supplies : The number of regulators used by the framebuffer. +- vinN-supply : The N-th (from 0) regulator used by the framebuffer. + + The above resources are expected to already be configured correctly. + The OS must ensure they are not modified or disabled while the simple + framebuffer remains active. + - display : phandle pointing to the primary display hardware node Example: @@ -68,6 +72,8 @@ chosen { stride = <(1600 * 2)>; format = "r5g6b5"; clocks = <&ahb_gates 36>, <&ahb_gates 43>, <&ahb_gates 44>; + num-supplies = <1>; + vin0-supply = <®_dc1sw>; display = <&lcdc0>; }; stdout-path = "display0";