From patchwork Tue Sep 28 07:34:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 12521937 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 598BDC433F5 for ; Tue, 28 Sep 2021 07:34:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4013F611EF for ; Tue, 28 Sep 2021 07:34:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239352AbhI1HgG (ORCPT ); Tue, 28 Sep 2021 03:36:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:55868 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239313AbhI1HgF (ORCPT ); Tue, 28 Sep 2021 03:36:05 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 42DF060F46; Tue, 28 Sep 2021 07:34:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1632814466; bh=DcrQyHSmyIMHU4UvUo1WQVZfImDpmzpTYq/ihCjHvCw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QngQg21rJ/xWZsSTPtYbPDVFyU1vsvsKHWpXIhgFLC52yuNuseBNiNQBZCrOIdWO8 fb008FnISrJBsFoteUvbiTA2UNgU4Zhz6EALmh9D6BXVhuIXWjB2Ipl28JiNGM2NPq 25eHSETPqUhDPYdGxlH3mXmdYtErUaGJuJhhIb5eIkDtGydg7hcAXqyuBwLS9L6zBF X9Wf8aBS2sx8O/IXUz3fALezNULw/Gz/a+ixetMdKAz5t+5Y54nmg2J189BH6t/SdY icVmJe1V8bQAyEv1mfnmmawlynT7QKd6R2f07SUBGg6o58bLUnGKzjRXnXFMZHrFQt I+l3ScyYGUFcg== Received: by mail.kernel.org with local (Exim 4.94.2) (envelope-from ) id 1mV7dA-000RPj-EU; Tue, 28 Sep 2021 09:34:24 +0200 From: Mauro Carvalho Chehab To: Bjorn Helgaas Cc: linuxarm@huawei.com, mauro.chehab@huawei.com, Mauro Carvalho Chehab , =?utf-8?q?Krzysztof_Wilc?= =?utf-8?q?zy=C5=84ski?= , Binghui Wang , Lorenzo Pieralisi , Rob Herring , Xiaowei Song , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org Subject: [PATCH v12 03/11] PCI: kirin: Add support for a PHY layer Date: Tue, 28 Sep 2021 09:34:13 +0200 Message-Id: <8a6d353145c0ec169d212094f5d534f93e2597f8.1632814194.git.mchehab+huawei@kernel.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 Sender: Mauro Carvalho Chehab Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The pcie-kirin driver contains both PHY and generic PCI driver on it. The best would be, instead, to support a PCI PHY driver, making the driver more generic. However, it is too late to remove the Kirin 960 PHY, as a change like that would make the DT schema incompatible with past versions. So, add support for an external PHY driver without removing the existing Kirin 960 PHY from it. Signed-off-by: Mauro Carvalho Chehab --- To mailbombing on a large number of people, only mailing lists were C/C on the cover. See [PATCH v12 00/11] at: https://lore.kernel.org/all/cover.1632814194.git.mchehab+huawei@kernel.org/ drivers/pci/controller/dwc/pcie-kirin.c | 95 +++++++++++++++++++++---- 1 file changed, 80 insertions(+), 15 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c index b4063a3434df..31514a5d4bb4 100644 --- a/drivers/pci/controller/dwc/pcie-kirin.c +++ b/drivers/pci/controller/dwc/pcie-kirin.c @@ -8,16 +8,18 @@ * Author: Xiaowei Song */ -#include #include +#include #include #include #include #include #include #include +#include #include #include +#include #include #include #include @@ -50,11 +52,18 @@ #define PCIE_DEBOUNCE_PARAM 0xF0F400 #define PCIE_OE_BYPASS (0x3 << 28) +enum pcie_kirin_phy_type { + PCIE_KIRIN_INTERNAL_PHY, + PCIE_KIRIN_EXTERNAL_PHY +}; + struct kirin_pcie { + enum pcie_kirin_phy_type type; + struct dw_pcie *pci; struct phy *phy; void __iomem *apb_base; - void *phy_priv; /* Needed for Kirin 960 PHY */ + void *phy_priv; /* only for PCIE_KIRIN_INTERNAL_PHY */ }; /* @@ -476,8 +485,63 @@ static const struct dw_pcie_host_ops kirin_pcie_host_ops = { .host_init = kirin_pcie_host_init, }; +static int kirin_pcie_power_on(struct platform_device *pdev, + struct kirin_pcie *kirin_pcie) +{ + struct device *dev = &pdev->dev; + int ret; + + if (kirin_pcie->type == PCIE_KIRIN_INTERNAL_PHY) { + ret = hi3660_pcie_phy_init(pdev, kirin_pcie); + if (ret) + return ret; + + return hi3660_pcie_phy_power_on(kirin_pcie); + } + + kirin_pcie->phy = devm_of_phy_get(dev, dev->of_node, NULL); + if (IS_ERR(kirin_pcie->phy)) + return PTR_ERR(kirin_pcie->phy); + + ret = phy_init(kirin_pcie->phy); + if (ret) + goto err; + + ret = phy_power_on(kirin_pcie->phy); + if (ret) + goto err; + + return 0; +err: + phy_exit(kirin_pcie->phy); + return ret; +} + +static int __exit kirin_pcie_remove(struct platform_device *pdev) +{ + struct kirin_pcie *kirin_pcie = platform_get_drvdata(pdev); + + if (kirin_pcie->type == PCIE_KIRIN_INTERNAL_PHY) + return 0; + + phy_power_off(kirin_pcie->phy); + phy_exit(kirin_pcie->phy); + + return 0; +} + +static const struct of_device_id kirin_pcie_match[] = { + { + .compatible = "hisilicon,kirin960-pcie", + .data = (void *)PCIE_KIRIN_INTERNAL_PHY + }, + {}, +}; + static int kirin_pcie_probe(struct platform_device *pdev) { + enum pcie_kirin_phy_type phy_type; + const struct of_device_id *of_id; struct device *dev = &pdev->dev; struct kirin_pcie *kirin_pcie; struct dw_pcie *pci; @@ -488,6 +552,14 @@ static int kirin_pcie_probe(struct platform_device *pdev) return -EINVAL; } + of_id = of_match_device(kirin_pcie_match, dev); + if (!of_id) { + dev_err(dev, "OF data missing\n"); + return -EINVAL; + } + + phy_type = (enum pcie_kirin_phy_type)of_id->data; + kirin_pcie = devm_kzalloc(dev, sizeof(struct kirin_pcie), GFP_KERNEL); if (!kirin_pcie) return -ENOMEM; @@ -500,31 +572,24 @@ static int kirin_pcie_probe(struct platform_device *pdev) pci->ops = &kirin_dw_pcie_ops; pci->pp.ops = &kirin_pcie_host_ops; kirin_pcie->pci = pci; - - ret = hi3660_pcie_phy_init(pdev, kirin_pcie); - if (ret) - return ret; + kirin_pcie->type = phy_type; ret = kirin_pcie_get_resource(kirin_pcie, pdev); if (ret) return ret; - ret = hi3660_pcie_phy_power_on(kirin_pcie); - if (ret) - return ret; - platform_set_drvdata(pdev, kirin_pcie); + ret = kirin_pcie_power_on(pdev, kirin_pcie); + if (ret) + return ret; + return dw_pcie_host_init(&pci->pp); } -static const struct of_device_id kirin_pcie_match[] = { - { .compatible = "hisilicon,kirin960-pcie" }, - {}, -}; - static struct platform_driver kirin_pcie_driver = { .probe = kirin_pcie_probe, + .remove = __exit_p(kirin_pcie_remove), .driver = { .name = "kirin-pcie", .of_match_table = kirin_pcie_match,