From patchwork Thu Mar 16 08:11:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 13177126 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 E6FF9C6FD19 for ; Thu, 16 Mar 2023 08:12:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230129AbjCPIMo (ORCPT ); Thu, 16 Mar 2023 04:12:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58622 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229629AbjCPIM0 (ORCPT ); Thu, 16 Mar 2023 04:12:26 -0400 Received: from mail-pg1-x534.google.com (mail-pg1-x534.google.com [IPv6:2607:f8b0:4864:20::534]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 45E32B4817 for ; Thu, 16 Mar 2023 01:12:05 -0700 (PDT) Received: by mail-pg1-x534.google.com with SMTP id x37so445266pga.1 for ; Thu, 16 Mar 2023 01:12:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1678954323; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=5zEDD5xeAHEZ2i3d5oJRhLNv6qhXgNx6bAcSNcEdEEU=; b=p0zNQUAQi7LdEt/99Pkhf22qcBD8T7jpAllqIXfm6jhsP53ov2qZUugX3f3ovei4eO Z6kj3yLM1/X1vX0v18BuSbt/QNLc/mFQa/AL56s4kD5jVobWYpQRSyZQA7rvG/Gfw9ny 0BNno/iKRS3wjNyU+dUVtZL3S+yn/G9NFgiEy6MF+8qApPZyJ0hAv0rup3MulXbZyAS2 OceMze3aFWke5kaDNriEEdtNY86A5o003xODBJE5HgIIdW5yi5/Hgcie2vpMwIOQDcmM pCfBCsjVJE6awkgWziolx6JnZerFdwkuRIeID1gUbRTSa66zqtSGyfKufwZJiC67aMFx xLZQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678954323; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=5zEDD5xeAHEZ2i3d5oJRhLNv6qhXgNx6bAcSNcEdEEU=; b=LVpDZKBRplvIRVhQoWFz6+d6pun31fs0n9bR3E0hNv8+YXcpwiukvsz6TscBGrfDfL YS6ZZVxWaCEKUT8KpIuxXWk8DWMjSwlLtATEzd2HutIBiHfVmyigpT5zb3emAUt323tm mDuvTozdepiFfv58Zi90RLiw3jGv6v5+u19Q/c1XGXQa6B/gECXyvonRYL7+TRSCjilk XpK+QzT8RQfHIG8ZTKrX+hZ5tRTEqscmOl8OaBwNQ8UZkS6smBSzUu962sH8BgP2xcSo fDVFJHhJOubHLGZcUv2MNodZZI7zrMhA3cVdDK63YS9AHJibEiumz8H0D0zJDx1GsgXz K5jg== X-Gm-Message-State: AO0yUKUdwaZuZhquIf0WM9Jbkxz4SZlNV6XhBkUskZ2znY4TtTZfTbjI jdVpp4SC8QuOkkWKv/+ETGaB X-Google-Smtp-Source: AK7set/YliiYuteUMjl2Zl7+FmiKJePOB5r/Q0E9JQMUE0JkB1zQbrX6KG8oJvR2cwODoqrewXHhoA== X-Received: by 2002:a62:6385:0:b0:625:7026:eb6d with SMTP id x127-20020a626385000000b006257026eb6dmr1699588pfb.32.1678954322861; Thu, 16 Mar 2023 01:12:02 -0700 (PDT) Received: from localhost.localdomain ([117.207.30.24]) by smtp.gmail.com with ESMTPSA id 13-20020aa7910d000000b005d9984a947bsm4804422pfh.139.2023.03.16.01.11.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Mar 2023 01:12:02 -0700 (PDT) From: Manivannan Sadhasivam To: andersson@kernel.org, lpieralisi@kernel.org, kw@linux.com, krzysztof.kozlowski+dt@linaro.org, robh@kernel.org Cc: konrad.dybcio@linaro.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, quic_srichara@quicinc.com, Manivannan Sadhasivam Subject: [PATCH v5 07/19] PCI: qcom: Use bulk reset APIs for handling resets for IP rev 2.1.0 Date: Thu, 16 Mar 2023 13:41:05 +0530 Message-Id: <20230316081117.14288-8-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230316081117.14288-1-manivannan.sadhasivam@linaro.org> References: <20230316081117.14288-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org All the resets are asserted and deasserted at the same time. So the bulk reset APIs can be used to handle them together. This simplifies the code a lot. While at it, let's also move the qcom_pcie_resources_2_1_0 struct below qcom_pcie_resources_1_0_0 to keep it sorted. Signed-off-by: Manivannan Sadhasivam --- drivers/pci/controller/dwc/pcie-qcom.c | 129 +++++++------------------ 1 file changed, 34 insertions(+), 95 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index 249033d1b248..10e792604042 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -143,22 +143,8 @@ #define PERST_DELAY_US 1000 -#define QCOM_PCIE_2_1_0_MAX_SUPPLY 3 -#define QCOM_PCIE_2_1_0_MAX_CLOCKS 5 - #define QCOM_PCIE_CRC8_POLYNOMIAL (BIT(2) | BIT(1) | BIT(0)) -struct qcom_pcie_resources_2_1_0 { - struct clk_bulk_data clks[QCOM_PCIE_2_1_0_MAX_CLOCKS]; - struct reset_control *pci_reset; - struct reset_control *axi_reset; - struct reset_control *ahb_reset; - struct reset_control *por_reset; - struct reset_control *phy_reset; - struct reset_control *ext_reset; - struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY]; -}; - struct qcom_pcie_resources_1_0_0 { struct clk *iface; struct clk *aux; @@ -168,6 +154,16 @@ struct qcom_pcie_resources_1_0_0 { struct regulator *vdda; }; +#define QCOM_PCIE_2_1_0_MAX_CLOCKS 5 +#define QCOM_PCIE_2_1_0_MAX_RESETS 6 +#define QCOM_PCIE_2_1_0_MAX_SUPPLY 3 +struct qcom_pcie_resources_2_1_0 { + struct clk_bulk_data clks[QCOM_PCIE_2_1_0_MAX_CLOCKS]; + struct reset_control_bulk_data resets[QCOM_PCIE_2_1_0_MAX_RESETS]; + int num_resets; + struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY]; +}; + #define QCOM_PCIE_2_3_2_MAX_SUPPLY 2 struct qcom_pcie_resources_2_3_2 { struct clk *aux_clk; @@ -295,6 +291,7 @@ static int qcom_pcie_get_resources_2_1_0(struct qcom_pcie *pcie) struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0; struct dw_pcie *pci = pcie->pci; struct device *dev = pci->dev; + bool is_apq = of_device_is_compatible(dev->of_node, "qcom,pcie-apq8064"); int ret; res->supplies[0].supply = "vdda"; @@ -321,28 +318,20 @@ static int qcom_pcie_get_resources_2_1_0(struct qcom_pcie *pcie) if (ret < 0) return ret; - res->pci_reset = devm_reset_control_get_exclusive(dev, "pci"); - if (IS_ERR(res->pci_reset)) - return PTR_ERR(res->pci_reset); - - res->axi_reset = devm_reset_control_get_exclusive(dev, "axi"); - if (IS_ERR(res->axi_reset)) - return PTR_ERR(res->axi_reset); - - res->ahb_reset = devm_reset_control_get_exclusive(dev, "ahb"); - if (IS_ERR(res->ahb_reset)) - return PTR_ERR(res->ahb_reset); + res->resets[0].id = "pci"; + res->resets[1].id = "axi"; + res->resets[2].id = "ahb"; + res->resets[3].id = "por"; + res->resets[4].id = "phy"; + res->resets[5].id = "ext"; - res->por_reset = devm_reset_control_get_exclusive(dev, "por"); - if (IS_ERR(res->por_reset)) - return PTR_ERR(res->por_reset); - - res->ext_reset = devm_reset_control_get_optional_exclusive(dev, "ext"); - if (IS_ERR(res->ext_reset)) - return PTR_ERR(res->ext_reset); + /* ext is optional on APQ8016 */ + res->num_resets = is_apq ? 5 : 6; + ret = devm_reset_control_bulk_get_exclusive(dev, res->num_resets, res->resets); + if (ret < 0) + return ret; - res->phy_reset = devm_reset_control_get_exclusive(dev, "phy"); - return PTR_ERR_OR_ZERO(res->phy_reset); + return 0; } static void qcom_pcie_deinit_2_1_0(struct qcom_pcie *pcie) @@ -350,12 +339,7 @@ static void qcom_pcie_deinit_2_1_0(struct qcom_pcie *pcie) struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0; clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks); - reset_control_assert(res->pci_reset); - reset_control_assert(res->axi_reset); - reset_control_assert(res->ahb_reset); - reset_control_assert(res->por_reset); - reset_control_assert(res->ext_reset); - reset_control_assert(res->phy_reset); + reset_control_bulk_assert(res->num_resets, res->resets); writel(1, pcie->parf + PARF_PHY_CTRL); @@ -370,12 +354,11 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie) int ret; /* reset the PCIe interface as uboot can leave it undefined state */ - reset_control_assert(res->pci_reset); - reset_control_assert(res->axi_reset); - reset_control_assert(res->ahb_reset); - reset_control_assert(res->por_reset); - reset_control_assert(res->ext_reset); - reset_control_assert(res->phy_reset); + ret = reset_control_bulk_assert(res->num_resets, res->resets); + if (ret < 0) { + dev_err(dev, "cannot assert resets\n"); + return ret; + } ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies); if (ret < 0) { @@ -383,58 +366,14 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie) return ret; } - ret = reset_control_deassert(res->ahb_reset); - if (ret) { - dev_err(dev, "cannot deassert ahb reset\n"); - goto err_deassert_ahb; - } - - ret = reset_control_deassert(res->ext_reset); - if (ret) { - dev_err(dev, "cannot deassert ext reset\n"); - goto err_deassert_ext; - } - - ret = reset_control_deassert(res->phy_reset); - if (ret) { - dev_err(dev, "cannot deassert phy reset\n"); - goto err_deassert_phy; - } - - ret = reset_control_deassert(res->pci_reset); - if (ret) { - dev_err(dev, "cannot deassert pci reset\n"); - goto err_deassert_pci; - } - - ret = reset_control_deassert(res->por_reset); - if (ret) { - dev_err(dev, "cannot deassert por reset\n"); - goto err_deassert_por; - } - - ret = reset_control_deassert(res->axi_reset); - if (ret) { - dev_err(dev, "cannot deassert axi reset\n"); - goto err_deassert_axi; + ret = reset_control_bulk_deassert(res->num_resets, res->resets); + if (ret < 0) { + dev_err(dev, "cannot deassert resets\n"); + regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies); + return ret; } return 0; - -err_deassert_axi: - reset_control_assert(res->por_reset); -err_deassert_por: - reset_control_assert(res->pci_reset); -err_deassert_pci: - reset_control_assert(res->phy_reset); -err_deassert_phy: - reset_control_assert(res->ext_reset); -err_deassert_ext: - reset_control_assert(res->ahb_reset); -err_deassert_ahb: - regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies); - - return ret; } static int qcom_pcie_post_init_2_1_0(struct qcom_pcie *pcie)