From patchwork Sat Dec 12 09:55:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "H. Nikolaus Schaller" X-Patchwork-Id: 11970059 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2AC2DC4361B for ; Sat, 12 Dec 2020 09:59:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E2E20206A4 for ; Sat, 12 Dec 2020 09:59:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2438491AbgLLJ6w (ORCPT ); Sat, 12 Dec 2020 04:58:52 -0500 Received: from mo4-p01-ob.smtp.rzone.de ([85.215.255.52]:35806 "EHLO mo4-p01-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2438467AbgLLJ6o (ORCPT ); Sat, 12 Dec 2020 04:58:44 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1607766929; s=strato-dkim-0002; d=goldelico.com; h=Message-Id:Date:Subject:Cc:To:From:From:Subject:Sender; bh=g6bpl7WULr2ukmQidYOp2C0r5vm/laI1YjdSO2Z4mDY=; b=WGnrZBALPPbamiiPMRkfsc49KHyr6BL/UIvbeiWw9K8Ik8UOaP4m2S0e5IzlrFXQL3 +FKM1JrBvM+vRxvNlhbtJCazTPGzLBN1CxzP3djUELk9SE4enmhRF8ojuykfzn/xfqO8 mACFdyE4l2db7qckI9Aqzrv3W1abmrwTOM2zZ165o3yX4JlhqF6t8FTZzhDrUWbeNVV5 90i/LhXBUwbtVO9UWDH763h0aUQ4Is696bJ8wtKVRrw67YCQBP8HaJ7T4frJfkAoCWkq NtdcqBCu5L2lCUJhvDhiE8T1Lj66hsCkuaFty2fpMoLwWekwQHS7aJVQQO1C4PNnCxKu Hmjw== X-RZG-AUTH: ":JGIXVUS7cutRB/49FwqZ7WcJeFKiMhflhwDubTJ9o1mfYzBGHXH4FpDwNN0=" X-RZG-CLASS-ID: mo00 Received: from iMac.fritz.box by smtp.strato.de (RZmta 47.7.1 DYNA|AUTH) with ESMTPSA id K0b553wBC9tQ2bo (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Sat, 12 Dec 2020 10:55:26 +0100 (CET) From: "H. Nikolaus Schaller" To: =?utf-8?q?Beno=C3=AEt_Cousson?= , Tony Lindgren , Rob Herring Cc: linux-omap@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, letux-kernel@openphoenux.org, Andreas Kemnade , "H. Nikolaus Schaller" , stable@vger.kernel.org Subject: [PATCH] DTS: ARM: gta04: remove legacy spi-cs-high to make display work again Date: Sat, 12 Dec 2020 10:55:25 +0100 Message-Id: X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org This reverts commit f1f028ff89cb ("DTS: ARM: gta04: introduce legacy spi-cs-high to make display work again") which had to be intruduced after commit 6953c57ab172 ("gpio: of: Handle SPI chipselect legacy bindings") broke the GTA04 display. This contradicted the data sheet but was the only way to get it as an spi client operational again. The panel data sheet defines the chip-select to be active low. Now, with the arrival of commit 766c6b63aa04 ("spi: fix client driver breakages when using GPIO descriptors") the logic of interaction between spi-cs-high and the gpio descriptor flags has been changed a second time, making the display broken again. So we have to remove the original fix which in retrospect was a workaround of a bug in the spi subsystem and not a feature of the panel or bug in the device tree. With this fix the device tree is back in sync with the data sheet and spi subsystem code. Fixes: 766c6b63aa04 ("spi: fix client driver breakages when using GPIO descriptors") CC: stable@vger.kernel.org Signed-off-by: H. Nikolaus Schaller --- arch/arm/boot/dts/omap3-gta04.dtsi | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/arm/boot/dts/omap3-gta04.dtsi b/arch/arm/boot/dts/omap3-gta04.dtsi index c8745bc800f71..003202d129907 100644 --- a/arch/arm/boot/dts/omap3-gta04.dtsi +++ b/arch/arm/boot/dts/omap3-gta04.dtsi @@ -124,7 +124,6 @@ lcd: td028ttec1@0 { spi-max-frequency = <100000>; spi-cpol; spi-cpha; - spi-cs-high; backlight= <&backlight>; label = "lcd";