From patchwork Fri Aug 21 03:54:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rob Herring (Arm)" X-Patchwork-Id: 11727809 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2192014F6 for ; Fri, 21 Aug 2020 03:56:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0A941208C7 for ; Fri, 21 Aug 2020 03:56:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597982177; bh=ryGt4rVessuHzDMteNz7woSpNVwankvpEVwmT2hE4/4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Okt1wSuGRPH9WJp2Esvybx7Cf3w4f48IjfJVkFKIMd32aZ3GYjEBd98LZtZKI+ZOs NfkV6CWRuJJQJqbejOwQf9ARlu+sfX6T/SDPa1xiMvZSBFmQV9fTeOhHp8Y3ZTC4gG OXavzoQL5eRB3WH5d3hlCCMueQoYGA447s1YhPNU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727779AbgHUD4Q (ORCPT ); Thu, 20 Aug 2020 23:56:16 -0400 Received: from mail-io1-f68.google.com ([209.85.166.68]:34980 "EHLO mail-io1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727125AbgHUD4P (ORCPT ); Thu, 20 Aug 2020 23:56:15 -0400 Received: by mail-io1-f68.google.com with SMTP id s2so492644ioo.2; Thu, 20 Aug 2020 20:56:14 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=U5dhy5lfNiv2CBspsoOGjvk1pottUqD5VgIGcHG48iU=; b=rzsOgmesKbjjSYHh1O3FvI/AzNGetiWHCDm5FlhuyZBwbBo7NAJSNg0QmKlqxpHgQr sdUROTgt8MiXV0Uy2XA9xvh5TKgKN8J5neH0alHbdU80IK5fmdHPkrDQ+TL6EhJ0N7pe ORk7gEWWslsdtyW6YLQxc9NGzDdBItJgPiXGzfpnx9QqcmkwKm9to0tSdhGEH3vFf5Yp SBtV9eT1DJqw4aXoCcXPdKgecDl5dr/p9CWDybwmrM9f9D8Y9fUQ2V95ZcMfOeMOd0pv 3BGGe9oUiGy4Np8XZc/I3kgp/d58mIQ28WK10WUYVSe/KREaFCQAw8gAg/KQ0ciwFflf RzbA== X-Gm-Message-State: AOAM533F0cIRjUR6TRpFSInczZrVZ9WdXpVmA7Peubv/6y23uEkDwhY+ inkLZ5UG5p+yAPdn+lbP0w== X-Google-Smtp-Source: ABdhPJxzrVgFDfxvtmE+MBNV+SieBk2ccjoW678S5hB6PbaJ4gStjqTHhwpWyikffZyFaD36Hauq7Q== X-Received: by 2002:a05:6638:bc2:: with SMTP id g2mr963413jad.21.1597982174122; Thu, 20 Aug 2020 20:56:14 -0700 (PDT) Received: from xps15.herring.priv ([64.188.179.249]) by smtp.googlemail.com with ESMTPSA id 79sm413923ilc.9.2020.08.20.20.56.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 20 Aug 2020 20:56:13 -0700 (PDT) From: Rob Herring To: Bjorn Helgaas , Lorenzo Pieralisi Cc: linux-pci@vger.kernel.org, Andy Gross , Binghui Wang , Bjorn Andersson , Dilip Kota , Fabio Estevam , Gustavo Pimentel , Jerome Brunet , Jesper Nilsson , Jingoo Han , Jonathan Chocron , Jonathan Hunter , Kevin Hilman , Kishon Vijay Abraham I , Krzysztof Kozlowski , Kukjin Kim , Kunihiko Hayashi , Lucas Stach , Martin Blumenstingl , Masahiro Yamada , Murali Karicheri , Neil Armstrong , NXP Linux Team , Pengutronix Kernel Team , Pratyush Anand , Richard Zhu , Sascha Hauer , Shawn Guo , Shawn Guo , Stanimir Varbanov , Thierry Reding , Xiaowei Song , Yue Wang , Marc Zyngier , linux-amlogic@lists.infradead.org, linux-arm-kernel@axis.com, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-tegra@vger.kernel.org Subject: [PATCH v2 26/40] PCI: dwc/meson: Drop unnecessary RC config space initialization Date: Thu, 20 Aug 2020 21:54:06 -0600 Message-Id: <20200821035420.380495-27-robh@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200821035420.380495-1-robh@kernel.org> References: <20200821035420.380495-1-robh@kernel.org> MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The common Designware init already initializes the RC PCI_COMMAND, BAR0 and BAR1 registers. The only difference here is the common code sets SERR. If clearing SERR is what's desired, then the Meson driver should do that instead. Cc: Yue Wang Cc: Lorenzo Pieralisi Cc: Bjorn Helgaas Cc: Kevin Hilman Cc: linux-amlogic@lists.infradead.org Signed-off-by: Rob Herring --- drivers/pci/controller/dwc/pci-meson.c | 20 -------------------- 1 file changed, 20 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-meson.c b/drivers/pci/controller/dwc/pci-meson.c index 96308743faf4..cca423e834e8 100644 --- a/drivers/pci/controller/dwc/pci-meson.c +++ b/drivers/pci/controller/dwc/pci-meson.c @@ -22,15 +22,6 @@ #define to_meson_pcie(x) dev_get_drvdata((x)->dev) -#define TYPE1_HDR_OFFSET 0x0 -#define PCIE_STATUS_COMMAND (TYPE1_HDR_OFFSET + 0x04) -#define PCI_IO_EN BIT(0) -#define PCI_MEM_SPACE_EN BIT(1) -#define PCI_BUS_MASTER_EN BIT(2) - -#define PCIE_BASE_ADDR0 (TYPE1_HDR_OFFSET + 0x10) -#define PCIE_BASE_ADDR1 (TYPE1_HDR_OFFSET + 0x14) - #define PCIE_CAP_OFFSET 0x70 #define PCIE_DEV_CTRL_DEV_STUS (PCIE_CAP_OFFSET + 0x08) #define PCIE_CAP_MAX_PAYLOAD_MASK GENMASK(7, 5) @@ -275,9 +266,6 @@ static void meson_pcie_init_dw(struct meson_pcie *mp) val = meson_cfg_readl(mp, PCIE_CFG0); val |= APP_LTSSM_ENABLE; meson_cfg_writel(mp, val, PCIE_CFG0); - - meson_elb_writel(mp, 0x0, PCIE_BASE_ADDR0); - meson_elb_writel(mp, 0x0, PCIE_BASE_ADDR1); } static int meson_size_to_payload(struct meson_pcie *mp, int size) @@ -325,13 +313,6 @@ static void meson_set_max_rd_req_size(struct meson_pcie *mp, int size) meson_elb_writel(mp, val, PCIE_DEV_CTRL_DEV_STUS); } -static inline void meson_enable_memory_space(struct meson_pcie *mp) -{ - /* Set the RC Bus Master, Memory Space and I/O Space enables */ - meson_elb_writel(mp, PCI_IO_EN | PCI_MEM_SPACE_EN | PCI_BUS_MASTER_EN, - PCIE_STATUS_COMMAND); -} - static int meson_pcie_establish_link(struct meson_pcie *mp) { struct dw_pcie *pci = &mp->pci; @@ -342,7 +323,6 @@ static int meson_pcie_establish_link(struct meson_pcie *mp) meson_set_max_rd_req_size(mp, MAX_READ_REQ_SIZE); dw_pcie_setup_rc(pp); - meson_enable_memory_space(mp); meson_pcie_assert_reset(mp);