[PATCH v4 1/8] staging: hikey9xx: add USB physical layer for Kirin 3670
From: Mauro Carvalho Chehab
Date: Thu Sep 17 2020 - 06:44:37 EST
From: Yu Chen <chenyu56@xxxxxxxxxx>
Add the Hisilicon Kirin 3670 USB phy driver.
This driver was imported from Linaro's official Hikey 970
tree, from the original patch, removing the addition of
the dwg3-specific parts, and getting the missing SoB from
its original author:
https://github.com/96boards-hikey/linux/commit/9d168f580c9977f9c7f48b228b72035e2f6e3eba#diff-93bb70bc97bdd7be752cb6722adf2124
[mchehab: moved to staging and dropped Makefile/Kconfig changes]
Signed-off-by: Yu Chen <chenyu56@xxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
---
drivers/staging/hikey9xx/phy-hi3670-usb3.c | 682 +++++++++++++++++++
drivers/staging/hikey9xx/phy-hi3670-usb3.txt | 25 +
2 files changed, 707 insertions(+)
create mode 100644 drivers/staging/hikey9xx/phy-hi3670-usb3.c
create mode 100644 drivers/staging/hikey9xx/phy-hi3670-usb3.txt
diff --git a/drivers/staging/hikey9xx/phy-hi3670-usb3.c b/drivers/staging/hikey9xx/phy-hi3670-usb3.c
new file mode 100644
index 000000000000..4e04ac97728d
--- /dev/null
+++ b/drivers/staging/hikey9xx/phy-hi3670-usb3.c
@@ -0,0 +1,682 @@
+/*
+ * Phy provider for USB 3.1 controller on HiSilicon Kirin970 platform
+ *
+ * Copyright (C) 2017-2018 Hilisicon Electronics Co., Ltd.
+ * http://www.huawei.com
+ *
+ * Authors: Yu Chen <chenyu56@xxxxxxxxxx>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 of
+ * the License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+#include <linux/clk.h>
+
+#define SCTRL_SCDEEPSLEEPED (0x0)
+#define USB_CLK_SELECTED BIT(20)
+
+#define PERI_CRG_PEREN0 (0x00)
+#define PERI_CRG_PERDIS0 (0x04)
+#define PERI_CRG_PEREN4 (0x40)
+#define PERI_CRG_PERDIS4 (0x44)
+#define PERI_CRG_PERRSTEN4 (0x90)
+#define PERI_CRG_PERRSTDIS4 (0x94)
+#define PERI_CRG_ISODIS (0x148)
+#define PERI_CRG_PEREN6 (0x410)
+#define PERI_CRG_PERDIS6 (0x414)
+
+#define USB_REFCLK_ISO_EN BIT(25)
+
+#define GT_CLK_USB2PHY_REF BIT(19)
+
+#define PCTRL_PERI_CTRL3 (0x10)
+#define PCTRL_PERI_CTRL3_MSK_START (16)
+#define USB_TCXO_EN BIT(1)
+
+#define PCTRL_PERI_CTRL24 (0x64)
+#define SC_CLK_USB3PHY_3MUX1_SEL BIT(25)
+
+#define USB3OTG_CTRL0 (0x00)
+#define USB3OTG_CTRL3 (0x0C)
+#define USB3OTG_CTRL4 (0x10)
+#define USB3OTG_CTRL5 (0x14)
+#define USB3OTG_CTRL7 (0x1C)
+#define USB_MISC_CFG50 (0x50)
+#define USB_MISC_CFG54 (0x54)
+#define USB_MISC_CFG58 (0x58)
+#define USB_MISC_CFG5C (0x5C)
+#define USB_MISC_CFGA0 (0xA0)
+#define TCA_CLK_RST (0x200)
+#define TCA_INTR_EN (0x204)
+#define TCA_INTR_STS (0x208)
+#define TCA_GCFG (0x210)
+#define TCA_TCPC (0x214)
+#define TCA_VBUS_CTRL (0x240)
+
+#define CTRL0_USB3_VBUSVLD BIT(7)
+#define CTRL0_USB3_VBUSVLD_SEL BIT(6)
+
+#define CTRL3_USB2_VBUSVLDEXT0 BIT(6)
+#define CTRL3_USB2_VBUSVLDEXTSEL0 BIT(5)
+
+#define CTRL5_USB2_SIDDQ BIT(0)
+
+#define CTRL7_USB2_REFCLKSEL_MASK (3 << 3)
+#define CTRL7_USB2_REFCLKSEL_ABB (3 << 3)
+#define CTRL7_USB2_REFCLKSEL_PAD (2 << 3)
+
+#define CFG50_USB3_PHY_TEST_POWERDOWN BIT(23)
+
+#define CFG54_USB31PHY_CR_ADDR_MASK (0xFFFF)
+#define CFG54_USB31PHY_CR_ADDR_SHIFT (16)
+#define CFG54_USB3PHY_REF_USE_PAD BIT(12)
+#define CFG54_PHY0_PMA_PWR_STABLE BIT(11)
+#define CFG54_PHY0_PCS_PWR_STABLE BIT(9)
+#define CFG54_USB31PHY_CR_ACK BIT(7)
+#define CFG54_USB31PHY_CR_WR_EN BIT(5)
+#define CFG54_USB31PHY_CR_SEL BIT(4)
+#define CFG54_USB31PHY_CR_RD_EN BIT(3)
+#define CFG54_USB31PHY_CR_CLK BIT(2)
+#define CFG54_USB3_PHY0_ANA_PWR_EN BIT(1)
+
+#define CFG58_USB31PHY_CR_DATA_MASK (0xFFFF)
+#define CFG58_USB31PHY_CR_DATA_RD_START (16)
+
+#define CFG5C_USB3_PHY0_SS_MPLLA_SSC_EN BIT(1)
+
+#define CFGA0_VAUX_RESET BIT(9)
+#define CFGA0_USB31C_RESET BIT(8)
+#define CFGA0_USB2PHY_REFCLK_SELECT BIT(4)
+#define CFGA0_USB3PHY_RESET BIT(1)
+#define CFGA0_USB2PHY_POR BIT(0)
+
+#define INTR_EN_XA_TIMEOUT_EVT_EN BIT(1)
+#define INTR_EN_XA_ACK_EVT_EN BIT(0)
+
+#define CLK_RST_TCA_REF_CLK_EN BIT(1)
+#define CLK_RST_SUSPEND_CLK_EN BIT(0)
+
+#define GCFG_ROLE_HSTDEV BIT(4)
+
+#define TCPC_VALID BIT(4)
+#define TCPC_LOW_POWER_EN BIT(3)
+#define TCPC_MUX_CONTROL_MASK (3 << 0)
+#define TCPC_MUX_CONTROL_USB31 (1 << 0)
+
+#define VBUS_CTRL_POWERPRESENT_OVERRD (3 << 2)
+#define VBUS_CTRL_VBUSVALID_OVERRD (3 << 0)
+
+#define KIRIN970_USB_DEFAULT_PHY_PARAM (0xFDFEE4)
+#define KIRIN970_USB_DEFAULT_PHY_VBOOST (0x5)
+
+#define TX_VBOOST_LVL_REG (0xf)
+#define TX_VBOOST_LVL_START (6)
+#define TX_VBOOST_LVL_ENABLE BIT(9)
+
+struct kirin970_priv {
+ struct device *dev;
+ struct regmap *peri_crg;
+ struct regmap *pctrl;
+ struct regmap *sctrl;
+ struct regmap *usb31misc;
+
+ u32 eye_diagram_param;
+ u32 tx_vboost_lvl;
+
+ u32 peri_crg_offset;
+ u32 pctrl_offset;
+ u32 usb31misc_offset;
+};
+
+static int kirin970_phy_cr_clk(struct regmap *usb31misc)
+{
+ int ret;
+
+ /* Clock up */
+ ret = regmap_update_bits(usb31misc, USB_MISC_CFG54,
+ CFG54_USB31PHY_CR_CLK, CFG54_USB31PHY_CR_CLK);
+ if (ret)
+ return ret;
+
+ /* Clock down */
+ ret = regmap_update_bits(usb31misc, USB_MISC_CFG54,
+ CFG54_USB31PHY_CR_CLK, 0);
+
+ return ret;
+}
+
+static int kirin970_phy_cr_set_sel(struct regmap *usb31misc)
+{
+ return regmap_update_bits(usb31misc, USB_MISC_CFG54,
+ CFG54_USB31PHY_CR_SEL, CFG54_USB31PHY_CR_SEL);
+}
+
+static int kirin970_phy_cr_start(struct regmap *usb31misc, int direction)
+{
+ int ret;
+
+ if (direction)
+ ret = regmap_update_bits(usb31misc, USB_MISC_CFG54,
+ CFG54_USB31PHY_CR_WR_EN, CFG54_USB31PHY_CR_WR_EN);
+ else
+ ret = regmap_update_bits(usb31misc, USB_MISC_CFG54,
+ CFG54_USB31PHY_CR_RD_EN, CFG54_USB31PHY_CR_RD_EN);
+
+ if (ret)
+ return ret;
+
+ ret = kirin970_phy_cr_clk(usb31misc);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(usb31misc, USB_MISC_CFG54,
+ CFG54_USB31PHY_CR_RD_EN | CFG54_USB31PHY_CR_WR_EN, 0);
+
+ return ret;
+}
+
+static int kirin970_phy_cr_wait_ack(struct regmap *usb31misc)
+{
+ u32 reg;
+ int retry = 100000;
+ int ret;
+
+ while (retry-- > 0) {
+ ret = regmap_read(usb31misc, USB_MISC_CFG54, ®);
+ if (ret)
+ return ret;
+ if ((reg & CFG54_USB31PHY_CR_ACK) == CFG54_USB31PHY_CR_ACK)
+ return 0;
+
+ ret = kirin970_phy_cr_clk(usb31misc);
+ if (ret)
+ return ret;
+ }
+
+ return -ETIMEDOUT;
+}
+
+static int kirin970_phy_cr_set_addr(struct regmap *usb31misc, u32 addr)
+{
+ u32 reg;
+ int ret;
+
+ ret = regmap_read(usb31misc, USB_MISC_CFG54, ®);
+ if (ret)
+ return ret;
+
+ reg &= ~(CFG54_USB31PHY_CR_ADDR_MASK << CFG54_USB31PHY_CR_ADDR_SHIFT);
+ reg |= ((addr & CFG54_USB31PHY_CR_ADDR_MASK) <<
+ CFG54_USB31PHY_CR_ADDR_SHIFT);
+ ret = regmap_write(usb31misc, USB_MISC_CFG54, reg);
+
+ return ret;
+}
+
+static int kirin970_phy_cr_read(struct regmap *usb31misc, u32 addr, u32 *val)
+{
+ int reg;
+ int i;
+ int ret;
+
+ for (i = 0; i < 100; i++) {
+ ret = kirin970_phy_cr_clk(usb31misc);
+ if (ret)
+ return ret;
+ }
+
+ ret = kirin970_phy_cr_set_sel(usb31misc);
+ if (ret)
+ return ret;
+
+ ret = kirin970_phy_cr_set_addr(usb31misc, addr);
+ if (ret)
+ return ret;
+
+ ret = kirin970_phy_cr_start(usb31misc, 0);
+ if (ret)
+ return ret;
+
+ ret = kirin970_phy_cr_wait_ack(usb31misc);
+ if (ret)
+ return ret;
+
+ ret = regmap_read(usb31misc, USB_MISC_CFG58, ®);
+ if (ret)
+ return ret;
+
+ *val = (reg >> CFG58_USB31PHY_CR_DATA_RD_START) &
+ CFG58_USB31PHY_CR_DATA_MASK;
+
+ return 0;
+}
+
+static int kirin970_phy_cr_write(struct regmap *usb31misc, u32 addr, u32 val)
+{
+ int i;
+ int ret;
+
+ for (i = 0; i < 100; i++) {
+ ret = kirin970_phy_cr_clk(usb31misc);
+ if (ret)
+ return ret;
+ }
+
+ ret = kirin970_phy_cr_set_sel(usb31misc);
+ if (ret)
+ return ret;
+
+ ret = kirin970_phy_cr_set_addr(usb31misc, addr);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(usb31misc, USB_MISC_CFG58,
+ val & CFG58_USB31PHY_CR_DATA_MASK);
+ if (ret)
+ return ret;
+
+ ret = kirin970_phy_cr_start(usb31misc, 1);
+ if (ret)
+ return ret;
+
+ ret = kirin970_phy_cr_wait_ack(usb31misc);
+
+ return ret;
+}
+
+static int kirin970_phy_set_params(struct kirin970_priv *priv)
+{
+ u32 reg;
+ int ret;
+ int retry = 3;
+
+ ret = regmap_write(priv->usb31misc, USB3OTG_CTRL4,
+ priv->eye_diagram_param);
+ if (ret) {
+ dev_err(priv->dev, "set USB3OTG_CTRL4 failed\n");
+ return ret;
+ }
+
+ while (retry-- > 0) {
+ ret = kirin970_phy_cr_read(priv->usb31misc,
+ TX_VBOOST_LVL_REG, ®);
+ if (!ret)
+ break;
+ else if (ret != -ETIMEDOUT) {
+ dev_err(priv->dev, "read TX_VBOOST_LVL_REG failed\n");
+ return ret;
+ }
+ }
+ if (ret)
+ return ret;
+
+ reg |= (TX_VBOOST_LVL_ENABLE |
+ (priv->tx_vboost_lvl << TX_VBOOST_LVL_START));
+ ret = kirin970_phy_cr_write(priv->usb31misc, TX_VBOOST_LVL_REG, reg);
+ if (ret)
+ dev_err(priv->dev, "write TX_VBOOST_LVL_REG failed\n");
+
+ return ret;
+}
+
+static int kirin970_is_abbclk_seleted(struct kirin970_priv *priv)
+{
+ u32 reg;
+
+ if (!priv->sctrl) {
+ dev_err(priv->dev, "priv->sctrl is null!\n");
+ return 1;
+ }
+
+ if (regmap_read(priv->sctrl, SCTRL_SCDEEPSLEEPED, ®)) {
+ dev_err(priv->dev, "SCTRL_SCDEEPSLEEPED read failed!\n");
+ return 1;
+ }
+
+ if ((reg & USB_CLK_SELECTED) == 0)
+ return 1;
+
+ return 0;
+}
+
+static int kirin970_config_phy_clock(struct kirin970_priv *priv)
+{
+ u32 val, mask;
+ int ret;
+
+ if (kirin970_is_abbclk_seleted(priv)) {
+ /* usb refclk iso disable */
+ ret = regmap_write(priv->peri_crg, PERI_CRG_ISODIS,
+ USB_REFCLK_ISO_EN);
+ if (ret)
+ goto out;
+
+ /* select usbphy clk from abb */
+ mask = SC_CLK_USB3PHY_3MUX1_SEL;
+ ret = regmap_update_bits(priv->pctrl,
+ PCTRL_PERI_CTRL24, mask, 0);
+ if (ret)
+ goto out;
+
+ ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFGA0,
+ CFGA0_USB2PHY_REFCLK_SELECT, 0);
+ if (ret)
+ goto out;
+
+ ret = regmap_read(priv->usb31misc, USB3OTG_CTRL7, &val);
+ if (ret)
+ goto out;
+ val &= ~CTRL7_USB2_REFCLKSEL_MASK;
+ val |= CTRL7_USB2_REFCLKSEL_ABB;
+ ret = regmap_write(priv->usb31misc, USB3OTG_CTRL7, val);
+ if (ret)
+ goto out;
+ } else {
+ ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFG54,
+ CFG54_USB3PHY_REF_USE_PAD,
+ CFG54_USB3PHY_REF_USE_PAD);
+ if (ret)
+ goto out;
+
+ ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFGA0,
+ CFGA0_USB2PHY_REFCLK_SELECT,
+ CFGA0_USB2PHY_REFCLK_SELECT);
+ if (ret)
+ goto out;
+
+ ret = regmap_read(priv->usb31misc, USB3OTG_CTRL7, &val);
+ if (ret)
+ goto out;
+ val &= ~CTRL7_USB2_REFCLKSEL_MASK;
+ val |= CTRL7_USB2_REFCLKSEL_PAD;
+ ret = regmap_write(priv->usb31misc, USB3OTG_CTRL7, val);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->peri_crg,
+ PERI_CRG_PEREN6, GT_CLK_USB2PHY_REF);
+ if (ret)
+ goto out;
+ }
+
+ return 0;
+out:
+ dev_err(priv->dev, "failed to config phy clock ret: %d\n", ret);
+ return ret;
+}
+
+static int kirin970_config_tca(struct kirin970_priv *priv)
+{
+ u32 val, mask;
+ int ret;
+
+ ret = regmap_write(priv->usb31misc, TCA_INTR_STS, 0xffff);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->usb31misc, TCA_INTR_EN,
+ INTR_EN_XA_TIMEOUT_EVT_EN | INTR_EN_XA_ACK_EVT_EN);
+ if (ret)
+ goto out;
+
+ mask = CLK_RST_TCA_REF_CLK_EN | CLK_RST_SUSPEND_CLK_EN;
+ ret = regmap_update_bits(priv->usb31misc, TCA_CLK_RST, mask, 0);
+ if (ret)
+ goto out;
+
+ ret = regmap_update_bits(priv->usb31misc, TCA_GCFG,
+ GCFG_ROLE_HSTDEV, GCFG_ROLE_HSTDEV);
+ if (ret)
+ goto out;
+
+ ret = regmap_read(priv->usb31misc, TCA_TCPC, &val);
+ if (ret)
+ goto out;
+ val &= ~(TCPC_VALID | TCPC_LOW_POWER_EN | TCPC_MUX_CONTROL_MASK);
+ val |= (TCPC_VALID | TCPC_MUX_CONTROL_USB31);
+ ret = regmap_write(priv->usb31misc, TCA_TCPC, val);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(priv->usb31misc, TCA_VBUS_CTRL,
+ VBUS_CTRL_POWERPRESENT_OVERRD | VBUS_CTRL_VBUSVALID_OVERRD);
+ if (ret)
+ goto out;
+
+ return 0;
+out:
+ dev_err(priv->dev, "failed to config phy clock ret: %d\n", ret);
+ return ret;
+}
+
+static int kirin970_phy_exit(struct phy *phy);
+
+static int kirin970_phy_init(struct phy *phy)
+{
+ struct kirin970_priv *priv = phy_get_drvdata(phy);
+ u32 val;
+ int ret;
+
+ kirin970_phy_exit(phy);
+ dev_info(priv->dev, "%s in\n", __func__);
+ /* assert controller */
+ val = CFGA0_VAUX_RESET | CFGA0_USB31C_RESET;
+ ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFGA0, val, 0);
+ if (ret)
+ goto out;
+
+ ret = kirin970_config_phy_clock(priv);
+ if (ret)
+ goto out;
+
+ /* Exit from IDDQ mode */
+ ret = regmap_update_bits(priv->usb31misc, USB3OTG_CTRL5,
+ CTRL5_USB2_SIDDQ, 0);
+ if (ret)
+ goto out;
+
+ /* Release USB31 PHY out of TestPowerDown mode */
+ ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFG50,
+ CFG50_USB3_PHY_TEST_POWERDOWN, 0);
+ if (ret)
+ goto out;
+
+ /* Tell the PHY power is stable */
+ val = CFG54_USB3_PHY0_ANA_PWR_EN | CFG54_PHY0_PCS_PWR_STABLE |
+ CFG54_PHY0_PMA_PWR_STABLE;
+ ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFG54,
+ val, val);
+ if (ret)
+ goto out;
+
+ ret = kirin970_config_tca(priv);
+ if (ret)
+ goto out;
+
+ /* Enable SSC */
+ ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFG5C,
+ CFG5C_USB3_PHY0_SS_MPLLA_SSC_EN,
+ CFG5C_USB3_PHY0_SS_MPLLA_SSC_EN);
+ if (ret)
+ goto out;
+
+ /* Deassert phy */
+ val = CFGA0_USB3PHY_RESET | CFGA0_USB2PHY_POR;
+ ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFGA0, val, val);
+ if (ret)
+ goto out;
+
+ udelay(100);
+
+ /* Deassert controller */
+ val = CFGA0_VAUX_RESET | CFGA0_USB31C_RESET;
+ ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFGA0, val, val);
+ if (ret)
+ goto out;
+
+ udelay(100);
+
+ /* Set fake vbus valid signal */
+ val = CTRL0_USB3_VBUSVLD | CTRL0_USB3_VBUSVLD_SEL;
+ ret = regmap_update_bits(priv->usb31misc, USB3OTG_CTRL0, val, val);
+ if (ret)
+ goto out;
+
+ val = CTRL3_USB2_VBUSVLDEXT0 | CTRL3_USB2_VBUSVLDEXTSEL0;
+ ret = regmap_update_bits(priv->usb31misc, USB3OTG_CTRL3, val, val);
+ if (ret)
+ goto out;
+
+ udelay(100);
+
+ ret = kirin970_phy_set_params(priv);
+ if (ret)
+ goto out;
+
+ {
+ ret = regmap_read(priv->peri_crg, 0x4c,
+ &val);
+ if (!ret)
+ dev_info(priv->dev, "peri_crg 0x4c %x\n", val);
+ ret = regmap_read(priv->peri_crg, 0x404,
+ &val);
+ if (!ret)
+ dev_info(priv->dev, "peri_crg 0x404 %x\n", val);
+ ret = regmap_read(priv->peri_crg, 0xc,
+ &val);
+ if (!ret)
+ dev_info(priv->dev, "peri_crg 0xc %x\n", val);
+ ret = regmap_read(priv->peri_crg, 0xac,
+ &val);
+ if (!ret)
+ dev_info(priv->dev, "peri_crg 0xac %x\n", val);
+ ret = regmap_read(priv->pctrl, 0x10,
+ &val);
+ if (!ret)
+ dev_info(priv->dev, "pctrl 0x10 %x\n", val);
+ }
+
+ return 0;
+out:
+ dev_err(priv->dev, "failed to init phy ret: %d\n", ret);
+ return ret;
+}
+
+static int kirin970_phy_exit(struct phy *phy)
+{
+ struct kirin970_priv *priv = phy_get_drvdata(phy);
+ u32 mask;
+ int ret;
+
+ /* Assert phy */
+ mask = CFGA0_USB3PHY_RESET | CFGA0_USB2PHY_POR;
+ ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFGA0, mask, 0);
+ if (ret)
+ goto out;
+
+ if (!kirin970_is_abbclk_seleted(priv)) {
+ ret = regmap_write(priv->peri_crg, PERI_CRG_PERDIS6,
+ GT_CLK_USB2PHY_REF);
+ if (ret)
+ goto out;
+ }
+
+ return 0;
+out:
+ dev_err(priv->dev, "failed to exit phy ret: %d\n", ret);
+ return ret;
+}
+
+static struct phy_ops kirin970_phy_ops = {
+ .init = kirin970_phy_init,
+ .exit = kirin970_phy_exit,
+ .owner = THIS_MODULE,
+};
+
+static int kirin970_phy_probe(struct platform_device *pdev)
+{
+ struct phy_provider *phy_provider;
+ struct device *dev = &pdev->dev;
+ struct phy *phy;
+ struct kirin970_priv *priv;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->dev = dev;
+ priv->peri_crg = syscon_regmap_lookup_by_phandle(dev->of_node,
+ "hisilicon,pericrg-syscon");
+ if (IS_ERR(priv->peri_crg)) {
+ dev_err(dev, "no hisilicon,pericrg-syscon\n");
+ return PTR_ERR(priv->peri_crg);
+ }
+
+ priv->pctrl = syscon_regmap_lookup_by_phandle(dev->of_node,
+ "hisilicon,pctrl-syscon");
+ if (IS_ERR(priv->pctrl)) {
+ dev_err(dev, "no hisilicon,pctrl-syscon\n");
+ return PTR_ERR(priv->pctrl);
+ }
+
+ priv->sctrl = syscon_regmap_lookup_by_phandle(dev->of_node,
+ "hisilicon,sctrl-syscon");
+ if (IS_ERR(priv->sctrl)) {
+ dev_err(dev, "no hisilicon,sctrl-syscon\n");
+ return PTR_ERR(priv->sctrl);
+ }
+
+ priv->usb31misc = syscon_regmap_lookup_by_phandle(dev->of_node,
+ "hisilicon,usb31-misc-syscon");
+ if (IS_ERR(priv->usb31misc)) {
+ dev_err(dev, "no hisilicon,usb31-misc-syscon\n");
+ return PTR_ERR(priv->usb31misc);
+ }
+
+ if (of_property_read_u32(dev->of_node, "eye-diagram-param",
+ &(priv->eye_diagram_param)))
+ priv->eye_diagram_param = KIRIN970_USB_DEFAULT_PHY_PARAM;
+
+ if (of_property_read_u32(dev->of_node, "usb3-phy-tx-vboost-lvl",
+ &(priv->tx_vboost_lvl)))
+ priv->eye_diagram_param = KIRIN970_USB_DEFAULT_PHY_VBOOST;
+
+ phy = devm_phy_create(dev, NULL, &kirin970_phy_ops);
+ if (IS_ERR(phy))
+ return PTR_ERR(phy);
+
+ phy_set_drvdata(phy, priv);
+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+ return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static const struct of_device_id kirin970_phy_of_match[] = {
+ {.compatible = "hisilicon,kirin970-usb-phy",},
+ { },
+};
+MODULE_DEVICE_TABLE(of, kirin970_phy_of_match);
+
+static struct platform_driver kirin970_phy_driver = {
+ .probe = kirin970_phy_probe,
+ .driver = {
+ .name = "kirin970-usb-phy",
+ .of_match_table = kirin970_phy_of_match,
+ }
+};
+module_platform_driver(kirin970_phy_driver);
+
+MODULE_AUTHOR("Yu Chen <chenyu56@xxxxxxxxxx>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Hilisicon Kirin970 USB31 PHY Driver");
diff --git a/drivers/staging/hikey9xx/phy-hi3670-usb3.txt b/drivers/staging/hikey9xx/phy-hi3670-usb3.txt
new file mode 100644
index 000000000000..4cb02612ff23
--- /dev/null
+++ b/drivers/staging/hikey9xx/phy-hi3670-usb3.txt
@@ -0,0 +1,25 @@
+Hisilicon Kirin970 usb PHY
+-----------------------
+
+Required properties:
+- compatible: should be "hisilicon,kirin970-usb-phy"
+- #phy-cells: must be 0
+- hisilicon,pericrg-syscon: phandle of syscon used to control phy.
+- hisilicon,pctrl-syscon: phandle of syscon used to control phy.
+- hisilicon,sctrl-syscon: phandle of syscon used to control phy.
+- hisilicon,usb31-misc-syscon: phandle of syscon used to control phy.
+- eye-diagram-param: parameter set for phy
+- usb3-phy-tx-vboost-lvl: parameter set for phy
+Refer to phy/phy-bindings.txt for the generic PHY binding properties
+
+Example:
+ usb_phy: usbphy {
+ compatible = "hisilicon,kirin970-usb-phy";
+ #phy-cells = <0>;
+ hisilicon,pericrg-syscon = <&crg_ctrl>;
+ hisilicon,pctrl-syscon = <&pctrl>;
+ hisilicon,sctrl-syscon = <&sctrl>;
+ hisilicon,usb31-misc-syscon = <&usb31_misc>;
+ eye-diagram-param = <0xFDFEE4>;
+ usb3-phy-tx-vboost-lvl = <0x5>;
+ };
--
2.26.2