From patchwork Mon Mar 6 15:32:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 659357 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 13D7BC678D4 for ; Mon, 6 Mar 2023 15:33:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229832AbjCFPds (ORCPT ); Mon, 6 Mar 2023 10:33:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59898 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230379AbjCFPdq (ORCPT ); Mon, 6 Mar 2023 10:33:46 -0500 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4824F32CCB for ; Mon, 6 Mar 2023 07:33:13 -0800 (PST) Received: by mail-pl1-x62d.google.com with SMTP id p6so10843246plf.0 for ; Mon, 06 Mar 2023 07:33:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1678116783; 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=UJ4Ik+ZoB8puIUL4lEznFsK6NoJYzy77sft3aaSqBZo=; b=DL/hWjcip5WwJihBQjlGRTyZlqBoBlVO70mke6sPwAFBexxy0QGwmm2ijXriVql0oe TRVvfCp4t/xUO3qKZi8uh3VWBeZIITWyeHunerFBBr1gYlHI26R/e9WWDliuowslxNQh 6HdVnWrJA5XzwQUv3ISLrX3BxakQeZ0VBSeqXU9e7z58KrH/Aw+NltpoJ1RAxxzc0ns7 fN7Haa9QrqK9nhLpkpQhcaJ9WXYMGWJ9RMuT3Kwg6oViI1O3JJ465NMXo67heZTvWV66 HHqFeb22MWOpiesOEOHfbQ5f8g9+ONjRxSHaoaIUrlUbetYI22R/SQlqfTAFz84Jx6YL 92Og== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678116783; 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=UJ4Ik+ZoB8puIUL4lEznFsK6NoJYzy77sft3aaSqBZo=; b=El+y0ejVrlsPSkVOFK3TwA6ojUT3lXhIMA1aHe2s9Si9ppkSHKqvomjbQJOztJF61f s5vctXoo4EiPY+ky60BmQowcCclDCHwBZhiCji2ZPsHjIZiIxSEzbh6+zJfgw0qzuLnA svGaXYumVHjySVzu1We/02MDFhaPYZ8M3dgtOhXTZfV06dq2LzL3yvVYjT/tHZgszxDg LiGjjINdbZnf37rl2qMCJLtVnlt/VlA7rKifih3fOovaI569NTYDz5iZt0rkzkhyjTV3 edxV8mJf/bGqbX6U71SPF/L7pQB6Lau/wDkk0HKisuOhDWoKorwDl2FRjH3egvkgABFw LBBQ== X-Gm-Message-State: AO0yUKWo5H70PcrcBGJB6l2rBO7VTKNcsb8Sm5KzPTmweNz+BY/JvDvO 4qGszuJu5uXu8tZb9aWDKl3k X-Google-Smtp-Source: AK7set871MSWRLqqkyk9FYiJLBPTaygut8yRIHWpaPH8i7gzVxJsAqzV7/Ph7Yw86EW7lF47DB5VGQ== X-Received: by 2002:a17:902:ec8a:b0:19d:138b:7c4a with SMTP id x10-20020a170902ec8a00b0019d138b7c4amr13600090plg.3.1678116783618; Mon, 06 Mar 2023 07:33:03 -0800 (PST) Received: from localhost.localdomain ([59.97.52.140]) by smtp.gmail.com with ESMTPSA id kl4-20020a170903074400b0019a7c890c61sm6837430plb.252.2023.03.06.07.32.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Mar 2023 07:33:03 -0800 (PST) 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 06/19] PCI: qcom: Use bulk reset APIs for handling resets for IP rev 2.1.0 Date: Mon, 6 Mar 2023 21:02:09 +0530 Message-Id: <20230306153222.157667-7-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230306153222.157667-1-manivannan.sadhasivam@linaro.org> References: <20230306153222.157667-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@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 4179ac973147..2d9116464842 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)