phy: add driver for Qualcomm IPQ40xx USB PHY (3c9d8f6c) · Commits · 戴 / test

drivers/phy/qualcomm/Kconfig

+7 −0

Original line number	Diff line number	Diff line
		@@ -18,6 +18,13 @@ config PHY_QCOM_APQ8064_SATA
		depends on OF
		select GENERIC_PHY

		config PHY_QCOM_IPQ4019_USB
		tristate "Qualcomm IPQ4019 USB PHY driver"
		depends on OF && (ARCH_QCOM \|\| COMPILE_TEST)
		select GENERIC_PHY
		help
		Support for the USB PHY-s on Qualcomm IPQ40xx SoC-s.

		config PHY_QCOM_IPQ806X_SATA
		tristate "Qualcomm IPQ806x SATA SerDes/PHY driver"
		depends on ARCH_QCOM

drivers/phy/qualcomm/Makefile

+1 −0

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		# SPDX-License-Identifier: GPL-2.0
		obj-$(CONFIG_PHY_ATH79_USB) += phy-ath79-usb.o
		obj-$(CONFIG_PHY_QCOM_APQ8064_SATA) += phy-qcom-apq8064-sata.o
		obj-$(CONFIG_PHY_QCOM_IPQ4019_USB) += phy-qcom-ipq4019-usb.o
		obj-$(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

drivers/phy/qualcomm/phy-qcom-ipq4019-usb.c

0 → 100644

+148 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-or-later
		/*
		* Copyright (C) 2018 John Crispin <john@phrozen.org>
		*
		* Based on code from
		* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
		*
		*/

		#include <linux/delay.h>
		#include <linux/err.h>
		#include <linux/io.h>
		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/mutex.h>
		#include <linux/of_platform.h>
		#include <linux/of_device.h>
		#include <linux/phy/phy.h>
		#include <linux/platform_device.h>
		#include <linux/reset.h>

		struct ipq4019_usb_phy {
		struct device *dev;
		struct phy *phy;
		void __iomem *base;
		struct reset_control *por_rst;
		struct reset_control *srif_rst;
		};

		static int ipq4019_ss_phy_power_off(struct phy *_phy)
		{
		struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);

		reset_control_assert(phy->por_rst);
		msleep(10);

		return 0;
		}

		static int ipq4019_ss_phy_power_on(struct phy *_phy)
		{
		struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);

		ipq4019_ss_phy_power_off(_phy);

		reset_control_deassert(phy->por_rst);

		return 0;
		}

		static struct phy_ops ipq4019_usb_ss_phy_ops = {
		.power_on = ipq4019_ss_phy_power_on,
		.power_off = ipq4019_ss_phy_power_off,
		};

		static int ipq4019_hs_phy_power_off(struct phy *_phy)
		{
		struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);

		reset_control_assert(phy->por_rst);
		msleep(10);

		reset_control_assert(phy->srif_rst);
		msleep(10);

		return 0;
		}

		static int ipq4019_hs_phy_power_on(struct phy *_phy)
		{
		struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);

		ipq4019_hs_phy_power_off(_phy);

		reset_control_deassert(phy->srif_rst);
		msleep(10);

		reset_control_deassert(phy->por_rst);

		return 0;
		}

		static struct phy_ops ipq4019_usb_hs_phy_ops = {
		.power_on = ipq4019_hs_phy_power_on,
		.power_off = ipq4019_hs_phy_power_off,
		};

		static const struct of_device_id ipq4019_usb_phy_of_match[] = {
		{ .compatible = "qcom,usb-hs-ipq4019-phy", .data = &ipq4019_usb_hs_phy_ops},
		{ .compatible = "qcom,usb-ss-ipq4019-phy", .data = &ipq4019_usb_ss_phy_ops},
		{ },
		};
		MODULE_DEVICE_TABLE(of, ipq4019_usb_phy_of_match);

		static int ipq4019_usb_phy_probe(struct platform_device *pdev)
		{
		struct device *dev = &pdev->dev;
		struct resource *res;
		struct phy_provider *phy_provider;
		struct ipq4019_usb_phy *phy;

		phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
		if (!phy)
		return -ENOMEM;

		phy->dev = &pdev->dev;
		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		phy->base = devm_ioremap_resource(&pdev->dev, res);
		if (IS_ERR(phy->base)) {
		dev_err(dev, "failed to remap register memory\n");
		return PTR_ERR(phy->base);
		}

		phy->por_rst = devm_reset_control_get(phy->dev, "por_rst");
		if (IS_ERR(phy->por_rst)) {
		if (PTR_ERR(phy->por_rst) != -EPROBE_DEFER)
		dev_err(dev, "POR reset is missing\n");
		return PTR_ERR(phy->por_rst);
		}

		phy->srif_rst = devm_reset_control_get_optional(phy->dev, "srif_rst");
		if (IS_ERR(phy->srif_rst))
		return PTR_ERR(phy->srif_rst);

		phy->phy = devm_phy_create(dev, NULL, of_device_get_match_data(dev));
		if (IS_ERR(phy->phy)) {
		dev_err(dev, "failed to create PHY\n");
		return PTR_ERR(phy->phy);
		}
		phy_set_drvdata(phy->phy, phy);

		phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);

		return PTR_ERR_OR_ZERO(phy_provider);
		}

		static struct platform_driver ipq4019_usb_phy_driver = {
		.probe = ipq4019_usb_phy_probe,
		.driver = {
		.of_match_table = ipq4019_usb_phy_of_match,
		.name = "ipq4019-usb-phy",
		}
		};
		module_platform_driver(ipq4019_usb_phy_driver);

		MODULE_DESCRIPTION("QCOM/IPQ4019 USB phy driver");
		MODULE_AUTHOR("John Crispin <john@phrozen.org>");
		MODULE_LICENSE("GPL v2");

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