From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 261F7C54EE9 for ; Tue, 20 Sep 2022 10:18:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230331AbiITKSx (ORCPT ); Tue, 20 Sep 2022 06:18:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50198 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230143AbiITKSw (ORCPT ); Tue, 20 Sep 2022 06:18:52 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 36CFE6D9CA; Tue, 20 Sep 2022 03:18:50 -0700 (PDT) Received: from [192.168.1.100] (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madras.collabora.co.uk (Postfix) with ESMTPSA id 1FA956600368; Tue, 20 Sep 2022 11:18:47 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1663669128; bh=B7xp7LNcnfbdR5oIkfuWVwdzNL7IbuXIGjam7V0vK40=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=SaWh1AMtnitMfo9coVDZcsdbltKYBYXw1LJst710ha2g5XKkVzVvVVl3mkwpxxGgm FthnwnKgggKvZyl2L4nVuOYLOoub08A7CWFtDfYuO0n39YHGmR+N89bIZ9WBXTkFfh /z+1CbJhG5nCl6CQS318lSxAGSRxzRwG8pTE8k5bw0LHZhqk3cFrB59Skd3+l7bnlS Nmg6BNozuvtjwsD94fpJMY90oSG3pr5dVxXqS3/fzpUoNpBsct05N4mWFKrVqR51ab xaS5ot7qE+WxpH0LABFAaBp0eYFgvd3dJUPoITu1R6pvxN3hLVfvgDL+LXTZwwaZ4K ewVvTrcPWH7vw== Message-ID: <32c4822a-a094-5fa3-c2af-e515bf897937@collabora.com> Date: Tue, 20 Sep 2022 12:18:44 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.2.0 Subject: Re: [PATCH v1 05/17] drm/mediatek: hdmi: use a syscon/regmap instead of iomem Content-Language: en-US To: Guillaume Ranquet , Vinod Koul , Stephen Boyd , David Airlie , Rob Herring , Philipp Zabel , Krzysztof Kozlowski , Daniel Vetter , Chunfeng Yun , CK Hu , Jitao shi , Chun-Kuang Hu , Michael Turquette , Kishon Vijay Abraham I , Matthias Brugger Cc: linux-mediatek@lists.infradead.org, dri-devel@lists.freedesktop.org, Pablo Sun , linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, Mattijs Korpershoek , linux-arm-kernel@lists.infradead.org, linux-phy@lists.infradead.org, devicetree@vger.kernel.org References: <20220919-v1-0-4844816c9808@baylibre.com> <20220919-v1-5-4844816c9808@baylibre.com> From: AngeloGioacchino Del Regno In-Reply-To: <20220919-v1-5-4844816c9808@baylibre.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org Il 19/09/22 18:56, Guillaume Ranquet ha scritto: > To prepare support for newer chips that need to share their address > range with a dedicated ddc driver, move to a syscon. > > Signed-off-by: Guillaume Ranquet > > diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c > index 3196189429bc..5cd05d4fe1a9 100644 > --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c > +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c ..snip.. > @@ -1428,7 +1413,6 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi, > struct device_node *cec_np, *remote, *i2c_np; > struct platform_device *cec_pdev; > struct regmap *regmap; > - struct resource *mem; > int ret; > > ret = mtk_hdmi_get_all_clk(hdmi, np); > @@ -1474,8 +1458,7 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi, > } > hdmi->sys_regmap = regmap; > > - mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); > - hdmi->regs = devm_ioremap_resource(dev, mem); > + hdmi->regs = syscon_node_to_regmap(dev->of_node); Nack. You're breaking ABI, this will force everyone to add syscon to devicetree, hence this breaks retrocompatibility with old devicetrees. Hint: not here, device_node_to_regmap() Regards, Angelo > if (IS_ERR(hdmi->regs)) { > ret = PTR_ERR(hdmi->regs); > goto put_device;