From patchwork Thu May 2 00:14:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Andersson X-Patchwork-Id: 10925927 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E24D6933 for ; Thu, 2 May 2019 00:14:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CF50928F30 for ; Thu, 2 May 2019 00:14:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BE71628F54; Thu, 2 May 2019 00:14:20 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 59B9728F30 for ; Thu, 2 May 2019 00:14:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726300AbfEBAOO (ORCPT ); Wed, 1 May 2019 20:14:14 -0400 Received: from mail-pg1-f196.google.com ([209.85.215.196]:44030 "EHLO mail-pg1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726184AbfEBAOM (ORCPT ); Wed, 1 May 2019 20:14:12 -0400 Received: by mail-pg1-f196.google.com with SMTP id t22so195215pgi.10 for ; Wed, 01 May 2019 17:14:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=CZXd7bu50ce7AYprUctVcayYE5p6uwU2diY6OgRXDUc=; b=z6pk+eo55Wg0ynWzV3ZjcdA3Kid/IP7lJfz5fI+cAMGRt9sxRkZqxePj/p9SIQ1ZpB K0qHCExH9cT74vIlKSsYEbRshW+UoIvljUHl2kisgiK6qExYWTdKxCdhtaQiFhcHSZwn jFLmE2mFOOd9uf30TUsLOgZJOKczb1GFrt6dUH0gBFjwVGUrylLvepSaQLiJG7orwdyJ tWmnlZmiFTav9N7NjtUubSBOvYK7yFWL+pmIF2jKP431HfYXZDtmAcnRpIjnsqbqqXdx Lh45qFk+Gndgkm1qw9FgDomCeVlcWvkiTJLkKVBId/RyeDgAzwG1wgZ1d1lCBPPWtnXq EMGg== 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; bh=CZXd7bu50ce7AYprUctVcayYE5p6uwU2diY6OgRXDUc=; b=mPe67Rdn1Q+8G1v6m9HY9pad5L0qokz/railMJHXBDdq6fb4CjA4RU+fMl9JMZvECa k37inFALswInNdbuFO4FAD81uehNGe3DB4HDJfaIeWcOIynZeIdQRZWcITmyOTNLuN0m b/1c4b4pn5wB2pcZtt6KzGBX+GLKyybiaUnB2vTIA7ob23N2XHKfnh0KyFpe4YL1x62U SqiqrP+6DWnZ0Ljbxq72Y6bxxl0fLK/khr9gh3tfrlEdVDHRBB5W9SKWtsPom1Z+eyDx T0sIr+UK2F4p5cjw+RUmz+fuOKgOZ78KjANHYf9o3TNekuAGs7rL1UvZh2gZAcHmCcK4 5RBA== X-Gm-Message-State: APjAAAXYoalrzjYcM8yK4rIMUle116IfRQhmcOuWcFDQ5jjtXlaL9zHX KFfIivftVF2kBX50CFkl8jgEew== X-Google-Smtp-Source: APXvYqy62m1OzKj5XM5bSXOmiuRFVcx1Ud9cAHEZC0ysdFyQ7V7XYLm46o1ioGRhjieAxI2CZ5Sr8g== X-Received: by 2002:a63:dd02:: with SMTP id t2mr830810pgg.434.1556756051785; Wed, 01 May 2019 17:14:11 -0700 (PDT) Received: from localhost.localdomain (104-188-17-28.lightspeed.sndgca.sbcglobal.net. [104.188.17.28]) by smtp.gmail.com with ESMTPSA id z9sm2329695pga.92.2019.05.01.17.14.10 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 01 May 2019 17:14:10 -0700 (PDT) From: Bjorn Andersson To: Kishon Vijay Abraham I , Rob Herring , Mark Rutland Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v3 1/2] dt-bindings: phy: Add binding for Qualcomm PCIe2 PHY Date: Wed, 1 May 2019 17:14:05 -0700 Message-Id: <20190502001406.10431-2-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20190502001406.10431-1-bjorn.andersson@linaro.org> References: <20190502001406.10431-1-bjorn.andersson@linaro.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The Qualcomm PCIe2 PHY is a Synopsys based PCIe PHY found in a number of Qualcomm platforms, add a binding to describe this. Signed-off-by: Bjorn Andersson Reviewed-by: Rob Herring --- Changes since v2: - Add #clock-cells .../bindings/phy/qcom-pcie2-phy.txt | 42 +++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 Documentation/devicetree/bindings/phy/qcom-pcie2-phy.txt diff --git a/Documentation/devicetree/bindings/phy/qcom-pcie2-phy.txt b/Documentation/devicetree/bindings/phy/qcom-pcie2-phy.txt new file mode 100644 index 000000000000..30064253f290 --- /dev/null +++ b/Documentation/devicetree/bindings/phy/qcom-pcie2-phy.txt @@ -0,0 +1,42 @@ +Qualcomm PCIe2 PHY controller +============================= + +The Qualcomm PCIe2 PHY is a Synopsys based phy found in a number of Qualcomm +platforms. + +Required properties: + - compatible: compatible list, should be: + "qcom,qcs404-pcie2-phy", "qcom,pcie2-phy" + + - reg: offset and length of the PHY register set. + - #phy-cells: must be 0. + + - clocks: a clock-specifier pair for the "pipe" clock + + - vdda-vp-supply: phandle to low voltage regulator + - vdda-vph-supply: phandle to high voltage regulator + + - resets: reset-specifier pairs for the "phy" and "pipe" resets + - reset-names: list of resets, should contain: + "phy" and "pipe" + + - clock-output-names: name of the outgoing clock signal from the PHY PLL + - #clock-cells: must be 0 + +Example: + phy@7786000 { + compatible = "qcom,qcs404-pcie2-phy", "qcom,pcie2-phy"; + reg = <0x07786000 0xb8>; + + clocks = <&gcc GCC_PCIE_0_PIPE_CLK>; + resets = <&gcc GCC_PCIEPHY_0_PHY_BCR>, + <&gcc GCC_PCIE_0_PIPE_ARES>; + reset-names = "phy", "pipe"; + + vdda-vp-supply = <&vreg_l3_1p05>; + vdda-vph-supply = <&vreg_l5_1p8>; + + clock-output-names = "pcie_0_pipe_clk"; + #clock-cells = <0>; + #phy-cells = <0>; + }; From patchwork Thu May 2 00:14:06 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Andersson X-Patchwork-Id: 10925929 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C5DC9933 for ; Thu, 2 May 2019 00:14:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B65CF28F30 for ; Thu, 2 May 2019 00:14:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AA81828F4E; Thu, 2 May 2019 00:14:21 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 80CD228F34 for ; Thu, 2 May 2019 00:14:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726133AbfEBAOT (ORCPT ); Wed, 1 May 2019 20:14:19 -0400 Received: from mail-pl1-f196.google.com ([209.85.214.196]:40222 "EHLO mail-pl1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726301AbfEBAOO (ORCPT ); Wed, 1 May 2019 20:14:14 -0400 Received: by mail-pl1-f196.google.com with SMTP id b3so166815plr.7 for ; Wed, 01 May 2019 17:14:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=3IRID0Psap5+hnu9EWOZu74+Ab8SXOGmY/dfMm4AW8o=; b=tMSpmai4u5pRlqD+PMO4+nXJEi0Sc+BFg2CIOw1rsZyFyyLzLqnLau3VRR9pqr9SuX T6coohoFGCXRGr6ySsZJMT8s5z1u3a5GO0FSll3mmrF3Q7wu1AlcCQhYjm1RS4ulvJNk GrbbXkGGLlJkqbK2cgMG9Aj4pHoxOF9lJhcpRw4HdUUyqTvHxyWL+To/izWahOYdDtJD hAJbgUXzZjj1J3DJiEwscyKdFHtPH4tko37TICGJ7apiUhi5CtpwSJ06IPCnRdksBPe+ LaPmUMQww5EetyWBWXqwg1k+8Ek1XgsBA6fA2rXDAVH/z1sTFGzRNHCvjSafgqnhIdWl GwVg== 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; bh=3IRID0Psap5+hnu9EWOZu74+Ab8SXOGmY/dfMm4AW8o=; b=etbjq1pvSK28RVFJbQpOUVfhjc85XmjB9Bv7nAO0KvyRUF9WXjEEtW7lm8fZGdmxNL jiz0RRxXdNgO58yGSukUMLH4vCrYXeji5aRtRyCXpTuyz8LJu4cNWZZRmYL3ioiHNeOZ Ml12bE6/tmBASg6N+ratczc1CfsxmpB3Hypico8dJY+qxcOX0EmJxEJb50vGuFoL672C /vG8ff+4uPaadMCwwTAiN+oIKF7tBJeGHMgyram557KgxAoaACOvcQtqe+Ey4orV/5Dr UJ38u0HAYYH1dUQZK3iE3P3yxZW5jAazVnW8ZqUwLz1oyC/FtgGoJNYNOiHcCtyCR4YA 984Q== X-Gm-Message-State: APjAAAX9/i2delta6xqWT0bHbnmJZtFfYADC3cuHmxrB9wGAUH9WDR0z YS9cLcbPqlEPwdA6zWVvQVRXJiK9fCM= X-Google-Smtp-Source: APXvYqwQVt92br+TIQ0cLkvPePHdklidTuKCsSOPd8EnAxiWdE9/gLccCC5/nI0DBaEGkJRiq6zI8w== X-Received: by 2002:a17:902:2b89:: with SMTP id l9mr458583plb.331.1556756053394; Wed, 01 May 2019 17:14:13 -0700 (PDT) Received: from localhost.localdomain (104-188-17-28.lightspeed.sndgca.sbcglobal.net. [104.188.17.28]) by smtp.gmail.com with ESMTPSA id z9sm2329695pga.92.2019.05.01.17.14.11 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 01 May 2019 17:14:12 -0700 (PDT) From: Bjorn Andersson To: Kishon Vijay Abraham I , Rob Herring , Mark Rutland Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v3 2/2] phy: qcom: Add Qualcomm PCIe2 PHY driver Date: Wed, 1 May 2019 17:14:06 -0700 Message-Id: <20190502001406.10431-3-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20190502001406.10431-1-bjorn.andersson@linaro.org> References: <20190502001406.10431-1-bjorn.andersson@linaro.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The Qualcomm PCIe2 PHY is based on design from Synopsys and found in several different platforms where the QMP PHY isn't used. Reviewed-by: Niklas Cassel Signed-off-by: Bjorn Andersson --- Changes since v2: - None drivers/phy/qualcomm/Kconfig | 8 + drivers/phy/qualcomm/Makefile | 1 + drivers/phy/qualcomm/phy-qcom-pcie2.c | 331 ++++++++++++++++++++++++++ 3 files changed, 340 insertions(+) create mode 100644 drivers/phy/qualcomm/phy-qcom-pcie2.c diff --git a/drivers/phy/qualcomm/Kconfig b/drivers/phy/qualcomm/Kconfig index 32f7d34eb784..8688ce27d0a6 100644 --- a/drivers/phy/qualcomm/Kconfig +++ b/drivers/phy/qualcomm/Kconfig @@ -24,6 +24,14 @@ config PHY_QCOM_IPQ806X_SATA depends on OF select GENERIC_PHY +config PHY_QCOM_PCIE2 + tristate "Qualcomm PCIe Gen2 PHY Driver" + depends on OF && COMMON_CLK && (ARCH_QCOM || COMPILE_TEST) + select GENERIC_PHY + help + Enable this to support the Qualcomm PCIe PHY, used with the Synopsys + based PCIe controller. + config PHY_QCOM_QMP tristate "Qualcomm QMP PHY Driver" depends on OF && COMMON_CLK && (ARCH_QCOM || COMPILE_TEST) diff --git a/drivers/phy/qualcomm/Makefile b/drivers/phy/qualcomm/Makefile index c56efd3af205..283251d6a5d9 100644 --- a/drivers/phy/qualcomm/Makefile +++ b/drivers/phy/qualcomm/Makefile @@ -2,6 +2,7 @@ obj-$(CONFIG_PHY_ATH79_USB) += phy-ath79-usb.o obj-$(CONFIG_PHY_QCOM_APQ8064_SATA) += phy-qcom-apq8064-sata.o obj-$(CONFIG_PHY_QCOM_IPQ806X_SATA) += phy-qcom-ipq806x-sata.o +obj-$(CONFIG_PHY_QCOM_PCIE2) += phy-qcom-pcie2.o obj-$(CONFIG_PHY_QCOM_QMP) += phy-qcom-qmp.o obj-$(CONFIG_PHY_QCOM_QUSB2) += phy-qcom-qusb2.o obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs.o diff --git a/drivers/phy/qualcomm/phy-qcom-pcie2.c b/drivers/phy/qualcomm/phy-qcom-pcie2.c new file mode 100644 index 000000000000..9dba3594e6d9 --- /dev/null +++ b/drivers/phy/qualcomm/phy-qcom-pcie2.c @@ -0,0 +1,331 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2014-2017, The Linux Foundation. All rights reserved. + * Copyright (c) 2019, Linaro Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define PCIE20_PARF_PHY_STTS 0x3c +#define PCIE2_PHY_RESET_CTRL 0x44 +#define PCIE20_PARF_PHY_REFCLK_CTRL2 0xa0 +#define PCIE20_PARF_PHY_REFCLK_CTRL3 0xa4 +#define PCIE20_PARF_PCS_SWING_CTRL1 0x88 +#define PCIE20_PARF_PCS_SWING_CTRL2 0x8c +#define PCIE20_PARF_PCS_DEEMPH1 0x74 +#define PCIE20_PARF_PCS_DEEMPH2 0x78 +#define PCIE20_PARF_PCS_DEEMPH3 0x7c +#define PCIE20_PARF_CONFIGBITS 0x84 +#define PCIE20_PARF_PHY_CTRL3 0x94 +#define PCIE20_PARF_PCS_CTRL 0x80 + +#define TX_AMP_VAL 120 +#define PHY_RX0_EQ_GEN1_VAL 0 +#define PHY_RX0_EQ_GEN2_VAL 4 +#define TX_DEEMPH_GEN1_VAL 24 +#define TX_DEEMPH_GEN2_3_5DB_VAL 26 +#define TX_DEEMPH_GEN2_6DB_VAL 36 +#define PHY_TX0_TERM_OFFST_VAL 0 + +struct qcom_phy { + struct device *dev; + void __iomem *base; + + struct regulator_bulk_data vregs[2]; + + struct reset_control *phy_reset; + struct reset_control *pipe_reset; + struct clk *pipe_clk; +}; + +static int qcom_pcie2_phy_init(struct phy *phy) +{ + struct qcom_phy *qphy = phy_get_drvdata(phy); + int ret; + + ret = reset_control_deassert(qphy->phy_reset); + if (ret) { + dev_err(qphy->dev, "cannot deassert pipe reset\n"); + return ret; + } + + ret = regulator_bulk_enable(ARRAY_SIZE(qphy->vregs), qphy->vregs); + if (ret) + reset_control_assert(qphy->phy_reset); + + return ret; +} + +static int qcom_pcie2_phy_power_on(struct phy *phy) +{ + struct qcom_phy *qphy = phy_get_drvdata(phy); + int ret; + u32 val; + + /* Program REF_CLK source */ + val = readl(qphy->base + PCIE20_PARF_PHY_REFCLK_CTRL2); + val &= ~BIT(1); + writel(val, qphy->base + PCIE20_PARF_PHY_REFCLK_CTRL2); + + usleep_range(1000, 2000); + + /* Don't use PAD for refclock */ + val = readl(qphy->base + PCIE20_PARF_PHY_REFCLK_CTRL2); + val &= ~BIT(0); + writel(val, qphy->base + PCIE20_PARF_PHY_REFCLK_CTRL2); + + /* Program SSP ENABLE */ + val = readl(qphy->base + PCIE20_PARF_PHY_REFCLK_CTRL3); + val |= BIT(0); + writel(val, qphy->base + PCIE20_PARF_PHY_REFCLK_CTRL3); + + usleep_range(1000, 2000); + + /* Assert Phy SW Reset */ + val = readl(qphy->base + PCIE2_PHY_RESET_CTRL); + val |= BIT(0); + writel(val, qphy->base + PCIE2_PHY_RESET_CTRL); + + /* Program Tx Amplitude */ + val = readl(qphy->base + PCIE20_PARF_PCS_SWING_CTRL1); + val &= ~0x7f; + val |= TX_AMP_VAL; + writel(val, qphy->base + PCIE20_PARF_PCS_SWING_CTRL1); + + val = readl(qphy->base + PCIE20_PARF_PCS_SWING_CTRL2); + val &= ~0x7f; + val |= TX_AMP_VAL; + writel(val, qphy->base + PCIE20_PARF_PCS_SWING_CTRL2); + + /* Program De-Emphasis */ + val = readl(qphy->base + PCIE20_PARF_PCS_DEEMPH1); + val &= ~0x3f; + val |= TX_DEEMPH_GEN2_6DB_VAL; + writel(val, qphy->base + PCIE20_PARF_PCS_DEEMPH1); + + val = readl(qphy->base + PCIE20_PARF_PCS_DEEMPH2); + val &= ~0x3f; + val |= TX_DEEMPH_GEN2_3_5DB_VAL; + writel(val, qphy->base + PCIE20_PARF_PCS_DEEMPH2); + + val = readl(qphy->base + PCIE20_PARF_PCS_DEEMPH3); + val &= ~0x3f; + val |= TX_DEEMPH_GEN1_VAL; + writel(val, qphy->base + PCIE20_PARF_PCS_DEEMPH3); + + /* Program Rx_Eq */ + val = readl(qphy->base + PCIE20_PARF_CONFIGBITS); + val &= ~0x7; + val |= PHY_RX0_EQ_GEN2_VAL; + writel(val, qphy->base + PCIE20_PARF_CONFIGBITS); + + /* Program Tx0_term_offset */ + val = readl(qphy->base + PCIE20_PARF_PHY_CTRL3); + val &= ~0x1f; + val |= PHY_TX0_TERM_OFFST_VAL; + writel(val, qphy->base + PCIE20_PARF_PHY_CTRL3); + + /* disable Tx2Rx Loopback */ + val = readl(qphy->base + PCIE20_PARF_PCS_CTRL); + val &= ~BIT(1); + writel(val, qphy->base + PCIE20_PARF_PCS_CTRL); + + /* De-assert Phy SW Reset */ + val = readl(qphy->base + PCIE2_PHY_RESET_CTRL); + val &= ~BIT(0); + writel(val, qphy->base + PCIE2_PHY_RESET_CTRL); + + usleep_range(1000, 2000); + + ret = reset_control_deassert(qphy->pipe_reset); + if (ret) { + dev_err(qphy->dev, "cannot deassert pipe reset\n"); + goto out; + } + + clk_set_rate(qphy->pipe_clk, 250000000); + + ret = clk_prepare_enable(qphy->pipe_clk); + if (ret) { + dev_err(qphy->dev, "failed to enable pipe clock\n"); + goto out; + } + + ret = readl_poll_timeout(qphy->base + PCIE20_PARF_PHY_STTS, val, + !(val & BIT(0)), 1000, 10); + if (ret) + dev_err(qphy->dev, "phy initialization failed\n"); + +out: + return ret; +} + +static int qcom_pcie2_phy_power_off(struct phy *phy) +{ + struct qcom_phy *qphy = phy_get_drvdata(phy); + u32 val; + + val = readl(qphy->base + PCIE2_PHY_RESET_CTRL); + val |= BIT(0); + writel(val, qphy->base + PCIE2_PHY_RESET_CTRL); + + clk_disable_unprepare(qphy->pipe_clk); + reset_control_assert(qphy->pipe_reset); + + return 0; +} + +static int qcom_pcie2_phy_exit(struct phy *phy) +{ + struct qcom_phy *qphy = phy_get_drvdata(phy); + + regulator_bulk_disable(ARRAY_SIZE(qphy->vregs), qphy->vregs); + reset_control_assert(qphy->phy_reset); + + return 0; +} + +static const struct phy_ops qcom_pcie2_ops = { + .init = qcom_pcie2_phy_init, + .power_on = qcom_pcie2_phy_power_on, + .power_off = qcom_pcie2_phy_power_off, + .exit = qcom_pcie2_phy_exit, + .owner = THIS_MODULE, +}; + +/* + * Register a fixed rate pipe clock. + * + * The _pipe_clksrc generated by PHY goes to the GCC that gate + * controls it. The _pipe_clk coming out of the GCC is requested + * by the PHY driver for its operations. + * We register the _pipe_clksrc here. The gcc driver takes care + * of assigning this _pipe_clksrc as parent to _pipe_clk. + * Below picture shows this relationship. + * + * +---------------+ + * | PHY block |<<---------------------------------------+ + * | | | + * | +-------+ | +-----+ | + * I/P---^-->| PLL |---^--->pipe_clksrc--->| GCC |--->pipe_clk---+ + * clk | +-------+ | +-----+ + * +---------------+ + */ +static int phy_pipe_clksrc_register(struct qcom_phy *qphy) +{ + struct device_node *np = qphy->dev->of_node; + struct clk_fixed_rate *fixed; + struct clk_init_data init = { }; + int ret; + + ret = of_property_read_string(np, "clock-output-names", &init.name); + if (ret) { + dev_err(qphy->dev, "%s: No clock-output-names\n", np->name); + return ret; + } + + fixed = devm_kzalloc(qphy->dev, sizeof(*fixed), GFP_KERNEL); + if (!fixed) + return -ENOMEM; + + init.ops = &clk_fixed_rate_ops; + + /* controllers using QMP phys use 250MHz pipe clock interface */ + fixed->fixed_rate = 250000000; + fixed->hw.init = &init; + + return devm_clk_hw_register(qphy->dev, &fixed->hw); +} + +static int qcom_pcie2_phy_probe(struct platform_device *pdev) +{ + struct phy_provider *phy_provider; + struct qcom_phy *qphy; + struct resource *res; + struct device *dev = &pdev->dev; + struct phy *phy; + int ret; + + qphy = devm_kzalloc(dev, sizeof(*qphy), GFP_KERNEL); + if (!qphy) + return -ENOMEM; + + qphy->dev = dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + qphy->base = devm_ioremap_resource(dev, res); + if (IS_ERR(qphy->base)) + return PTR_ERR(qphy->base); + + ret = phy_pipe_clksrc_register(qphy); + if (ret) { + dev_err(dev, "failed to register pipe_clk\n"); + return ret; + } + + qphy->vregs[0].supply = "vdda-vp"; + qphy->vregs[1].supply = "vdda-vph"; + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(qphy->vregs), qphy->vregs); + if (ret < 0) + return ret; + + qphy->pipe_clk = devm_clk_get(dev, NULL); + if (IS_ERR(qphy->pipe_clk)) { + dev_err(dev, "failed to acquire pipe clock\n"); + return PTR_ERR(qphy->pipe_clk); + } + + qphy->phy_reset = devm_reset_control_get_exclusive(dev, "phy"); + if (IS_ERR(qphy->phy_reset)) { + dev_err(dev, "failed to acquire phy reset\n"); + return PTR_ERR(qphy->phy_reset); + } + + qphy->pipe_reset = devm_reset_control_get_exclusive(dev, "pipe"); + if (IS_ERR(qphy->pipe_reset)) { + dev_err(dev, "failed to acquire pipe reset\n"); + return PTR_ERR(qphy->pipe_reset); + } + + phy = devm_phy_create(dev, dev->of_node, &qcom_pcie2_ops); + if (IS_ERR(phy)) { + dev_err(dev, "failed to create phy\n"); + return PTR_ERR(phy); + } + + phy_set_drvdata(phy, qphy); + + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + if (IS_ERR(phy_provider)) + dev_err(dev, "failed to register phy provider\n"); + + return PTR_ERR_OR_ZERO(phy_provider); +} + +static const struct of_device_id qcom_pcie2_phy_match_table[] = { + { .compatible = "qcom,pcie2-phy" }, + {} +}; +MODULE_DEVICE_TABLE(of, qcom_pcie2_phy_match_table); + +static struct platform_driver qcom_pcie2_phy_driver = { + .probe = qcom_pcie2_phy_probe, + .driver = { + .name = "phy-qcom-pcie2", + .of_match_table = qcom_pcie2_phy_match_table, + }, +}; + +module_platform_driver(qcom_pcie2_phy_driver); + +MODULE_DESCRIPTION("Qualcomm PCIe PHY driver"); +MODULE_LICENSE("GPL v2");