Re: [PATCH v9 3/5] phy: add usb3.0 phy driver for mt65xx SoCs

From: chunfeng yun
Date: Thu Oct 08 2015 - 07:46:37 EST

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Hi,
On Tue, 2015-10-06 at 19:50 +0530, Kishon Vijay Abraham I wrote:
> Hi Chunfeng,
>
> On Tuesday 29 September 2015 08:31 AM, Chunfeng Yun wrote:
> > support usb3.0 phy of mt65xx SoCs
>
> I have merged this driver. Can you also send a patch adding yourself as
> the maintainer of this driver?
>
Ok, I will send it later

Thank you very much.

> Thanks
> Kishon
> >
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
> > ---
> > drivers/phy/Kconfig | 9 +
> > drivers/phy/Makefile | 1 +
> > drivers/phy/phy-mt65xx-usb3.c | 506 ++++++++++++++++++++++++++++++++++++++++++
> > 3 files changed, 516 insertions(+)
> > create mode 100644 drivers/phy/phy-mt65xx-usb3.c
> >
> > diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> > index 47da573..ec436c1 100644
> > --- a/drivers/phy/Kconfig
> > +++ b/drivers/phy/Kconfig
> > @@ -206,6 +206,15 @@ config PHY_HIX5HD2_SATA
> > help
> > Support for SATA PHY on Hisilicon hix5hd2 Soc.
> >
> > +config PHY_MT65XX_USB3
> > + tristate "Mediatek USB3.0 PHY Driver"
> > + depends on ARCH_MEDIATEK && OF
> > + select GENERIC_PHY
> > + help
> > + Say 'Y' here to add support for Mediatek USB3.0 PHY driver
> > + for mt65xx SoCs. it supports two usb2.0 ports and
> > + one usb3.0 port.
> > +
> > config PHY_SUN4I_USB
> > tristate "Allwinner sunxi SoC USB PHY driver"
> > depends on ARCH_SUNXI && HAS_IOMEM && OF
> > diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
> > index a5b18c1..a7cc629 100644
> > --- a/drivers/phy/Makefile
> > +++ b/drivers/phy/Makefile
> > @@ -23,6 +23,7 @@ obj-$(CONFIG_TI_PIPE3) += phy-ti-pipe3.o
> > obj-$(CONFIG_TWL4030_USB) += phy-twl4030-usb.o
> > obj-$(CONFIG_PHY_EXYNOS5250_SATA) += phy-exynos5250-sata.o
> > obj-$(CONFIG_PHY_HIX5HD2_SATA) += phy-hix5hd2-sata.o
> > +obj-$(CONFIG_PHY_MT65XX_USB3) += phy-mt65xx-usb3.o
> > obj-$(CONFIG_PHY_SUN4I_USB) += phy-sun4i-usb.o
> > obj-$(CONFIG_PHY_SUN9I_USB) += phy-sun9i-usb.o
> > obj-$(CONFIG_PHY_SAMSUNG_USB2) += phy-exynos-usb2.o
> > diff --git a/drivers/phy/phy-mt65xx-usb3.c b/drivers/phy/phy-mt65xx-usb3.c
> > new file mode 100644
> > index 0000000..f30b28b
> > --- /dev/null
> > +++ b/drivers/phy/phy-mt65xx-usb3.c
> > @@ -0,0 +1,506 @@
> > +/*
> > + * Copyright (c) 2015 MediaTek Inc.
> > + * Author: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
> > + *
> > + * This software is licensed under the terms of the GNU General Public
> > + * License version 2, as published by the Free Software Foundation, and
> > + * may be copied, distributed, and modified under those terms.
> > + *
> > + * 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 <dt-bindings/phy/phy.h>
> > +#include <linux/clk.h>
> > +#include <linux/delay.h>
> > +#include <linux/io.h>
> > +#include <linux/module.h>
> > +#include <linux/of_address.h>
> > +#include <linux/phy/phy.h>
> > +#include <linux/platform_device.h>
> > +
> > +/*
> > + * for sifslv2 register, but exclude port's;
> > + * relative to USB3_SIF2_BASE base address
> > + */
> > +#define SSUSB_SIFSLV_SPLLC 0x0000
> > +
> > +/* offsets of sub-segment in each port registers */
> > +#define SSUSB_SIFSLV_U2PHY_COM_BASE 0x0000
> > +#define SSUSB_SIFSLV_U3PHYD_BASE 0x0100
> > +#define SSUSB_USB30_PHYA_SIV_B_BASE 0x0300
> > +#define SSUSB_SIFSLV_U3PHYA_DA_BASE 0x0400
> > +
> > +#define U3P_USBPHYACR0 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0000)
> > +#define PA0_RG_U2PLL_FORCE_ON BIT(15)
> > +
> > +#define U3P_USBPHYACR2 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0008)
> > +#define PA2_RG_SIF_U2PLL_FORCE_EN BIT(18)
> > +
> > +#define U3P_USBPHYACR5 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0014)
> > +#define PA5_RG_U2_HSTX_SRCTRL GENMASK(14, 12)
> > +#define PA5_RG_U2_HSTX_SRCTRL_VAL(x) ((0x7 & (x)) << 12)
> > +#define PA5_RG_U2_HS_100U_U3_EN BIT(11)
> > +
> > +#define U3P_USBPHYACR6 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0018)
> > +#define PA6_RG_U2_ISO_EN BIT(31)
> > +#define PA6_RG_U2_BC11_SW_EN BIT(23)
> > +#define PA6_RG_U2_OTG_VBUSCMP_EN BIT(20)
> > +
> > +#define U3P_U2PHYACR4 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0020)
> > +#define P2C_RG_USB20_GPIO_CTL BIT(9)
> > +#define P2C_USB20_GPIO_MODE BIT(8)
> > +#define P2C_U2_GPIO_CTR_MSK (P2C_RG_USB20_GPIO_CTL | P2C_USB20_GPIO_MODE)
> > +
> > +#define U3D_U2PHYDCR0 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0060)
> > +#define P2C_RG_SIF_U2PLL_FORCE_ON BIT(24)
> > +
> > +#define U3P_U2PHYDTM0 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x0068)
> > +#define P2C_FORCE_UART_EN BIT(26)
> > +#define P2C_FORCE_DATAIN BIT(23)
> > +#define P2C_FORCE_DM_PULLDOWN BIT(21)
> > +#define P2C_FORCE_DP_PULLDOWN BIT(20)
> > +#define P2C_FORCE_XCVRSEL BIT(19)
> > +#define P2C_FORCE_SUSPENDM BIT(18)
> > +#define P2C_FORCE_TERMSEL BIT(17)
> > +#define P2C_RG_DATAIN GENMASK(13, 10)
> > +#define P2C_RG_DATAIN_VAL(x) ((0xf & (x)) << 10)
> > +#define P2C_RG_DMPULLDOWN BIT(7)
> > +#define P2C_RG_DPPULLDOWN BIT(6)
> > +#define P2C_RG_XCVRSEL GENMASK(5, 4)
> > +#define P2C_RG_XCVRSEL_VAL(x) ((0x3 & (x)) << 4)
> > +#define P2C_RG_SUSPENDM BIT(3)
> > +#define P2C_RG_TERMSEL BIT(2)
> > +#define P2C_DTM0_PART_MASK \
> > + (P2C_FORCE_DATAIN | P2C_FORCE_DM_PULLDOWN | \
> > + P2C_FORCE_DP_PULLDOWN | P2C_FORCE_XCVRSEL | \
> > + P2C_FORCE_TERMSEL | P2C_RG_DMPULLDOWN | \
> > + P2C_RG_DPPULLDOWN | P2C_RG_TERMSEL)
> > +
> > +#define U3P_U2PHYDTM1 (SSUSB_SIFSLV_U2PHY_COM_BASE + 0x006C)
> > +#define P2C_RG_UART_EN BIT(16)
> > +#define P2C_RG_VBUSVALID BIT(5)
> > +#define P2C_RG_SESSEND BIT(4)
> > +#define P2C_RG_AVALID BIT(2)
> > +
> > +#define U3P_U3_PHYA_REG0 (SSUSB_USB30_PHYA_SIV_B_BASE + 0x0000)
> > +#define P3A_RG_U3_VUSB10_ON BIT(5)
> > +
> > +#define U3P_U3_PHYA_REG6 (SSUSB_USB30_PHYA_SIV_B_BASE + 0x0018)
> > +#define P3A_RG_TX_EIDLE_CM GENMASK(31, 28)
> > +#define P3A_RG_TX_EIDLE_CM_VAL(x) ((0xf & (x)) << 28)
> > +
> > +#define U3P_U3_PHYA_REG9 (SSUSB_USB30_PHYA_SIV_B_BASE + 0x0024)
> > +#define P3A_RG_RX_DAC_MUX GENMASK(5, 1)
> > +#define P3A_RG_RX_DAC_MUX_VAL(x) ((0x1f & (x)) << 1)
> > +
> > +#define U3P_U3PHYA_DA_REG0 (SSUSB_SIFSLV_U3PHYA_DA_BASE + 0x0000)
> > +#define P3A_RG_XTAL_EXT_EN_U3 GENMASK(11, 10)
> > +#define P3A_RG_XTAL_EXT_EN_U3_VAL(x) ((0x3 & (x)) << 10)
> > +
> > +#define U3P_PHYD_CDR1 (SSUSB_SIFSLV_U3PHYD_BASE + 0x005c)
> > +#define P3D_RG_CDR_BIR_LTD1 GENMASK(28, 24)
> > +#define P3D_RG_CDR_BIR_LTD1_VAL(x) ((0x1f & (x)) << 24)
> > +#define P3D_RG_CDR_BIR_LTD0 GENMASK(12, 8)
> > +#define P3D_RG_CDR_BIR_LTD0_VAL(x) ((0x1f & (x)) << 8)
> > +
> > +#define U3P_XTALCTL3 (SSUSB_SIFSLV_SPLLC + 0x0018)
> > +#define XC3_RG_U3_XTAL_RX_PWD BIT(9)
> > +#define XC3_RG_U3_FRC_XTAL_RX_PWD BIT(8)
> > +
> > +struct mt65xx_phy_instance {
> > + struct phy *phy;
> > + void __iomem *port_base;
> > + u32 index;
> > + u8 type;
> > +};
> > +
> > +struct mt65xx_u3phy {
> > + struct device *dev;
> > + void __iomem *sif_base; /* include sif2, but exclude port's */
> > + struct clk *u3phya_ref; /* reference clock of usb3 anolog phy */
> > + struct mt65xx_phy_instance **phys;
> > + int nphys;
> > +};
> > +
> > +static void phy_instance_init(struct mt65xx_u3phy *u3phy,
> > + struct mt65xx_phy_instance *instance)
> > +{
> > + void __iomem *port_base = instance->port_base;
> > + u32 index = instance->index;
> > + u32 tmp;
> > +
> > + /* switch to USB function. (system register, force ip into usb mode) */
> > + tmp = readl(port_base + U3P_U2PHYDTM0);
> > + tmp &= ~P2C_FORCE_UART_EN;
> > + tmp |= P2C_RG_XCVRSEL_VAL(1) | P2C_RG_DATAIN_VAL(0);
> > + writel(tmp, port_base + U3P_U2PHYDTM0);
> > +
> > + tmp = readl(port_base + U3P_U2PHYDTM1);
> > + tmp &= ~P2C_RG_UART_EN;
> > + writel(tmp, port_base + U3P_U2PHYDTM1);
> > +
> > + if (!index) {
> > + tmp = readl(port_base + U3P_U2PHYACR4);
> > + tmp &= ~P2C_U2_GPIO_CTR_MSK;
> > + writel(tmp, port_base + U3P_U2PHYACR4);
> > +
> > + tmp = readl(port_base + U3P_USBPHYACR2);
> > + tmp |= PA2_RG_SIF_U2PLL_FORCE_EN;
> > + writel(tmp, port_base + U3P_USBPHYACR2);
> > +
> > + tmp = readl(port_base + U3D_U2PHYDCR0);
> > + tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
> > + writel(tmp, port_base + U3D_U2PHYDCR0);
> > + } else {
> > + tmp = readl(port_base + U3D_U2PHYDCR0);
> > + tmp |= P2C_RG_SIF_U2PLL_FORCE_ON;
> > + writel(tmp, port_base + U3D_U2PHYDCR0);
> > +
> > + tmp = readl(port_base + U3P_U2PHYDTM0);
> > + tmp |= P2C_RG_SUSPENDM | P2C_FORCE_SUSPENDM;
> > + writel(tmp, port_base + U3P_U2PHYDTM0);
> > + }
> > +
> > + /* DP/DM BC1.1 path Disable */
> > + tmp = readl(port_base + U3P_USBPHYACR6);
> > + tmp &= ~PA6_RG_U2_BC11_SW_EN;
> > + writel(tmp, port_base + U3P_USBPHYACR6);
> > +
> > + tmp = readl(port_base + U3P_U3PHYA_DA_REG0);
> > + tmp &= ~P3A_RG_XTAL_EXT_EN_U3;
> > + tmp |= P3A_RG_XTAL_EXT_EN_U3_VAL(2);
> > + writel(tmp, port_base + U3P_U3PHYA_DA_REG0);
> > +
> > + tmp = readl(port_base + U3P_U3_PHYA_REG9);
> > + tmp &= ~P3A_RG_RX_DAC_MUX;
> > + tmp |= P3A_RG_RX_DAC_MUX_VAL(4);
> > + writel(tmp, port_base + U3P_U3_PHYA_REG9);
> > +
> > + tmp = readl(port_base + U3P_U3_PHYA_REG6);
> > + tmp &= ~P3A_RG_TX_EIDLE_CM;
> > + tmp |= P3A_RG_TX_EIDLE_CM_VAL(0xe);
> > + writel(tmp, port_base + U3P_U3_PHYA_REG6);
> > +
> > + tmp = readl(port_base + U3P_PHYD_CDR1);
> > + tmp &= ~(P3D_RG_CDR_BIR_LTD0 | P3D_RG_CDR_BIR_LTD1);
> > + tmp |= P3D_RG_CDR_BIR_LTD0_VAL(0xc) | P3D_RG_CDR_BIR_LTD1_VAL(0x3);
> > + writel(tmp, port_base + U3P_PHYD_CDR1);
> > +
> > + dev_dbg(u3phy->dev, "%s(%d)\n", __func__, index);
> > +}
> > +
> > +static void phy_instance_power_on(struct mt65xx_u3phy *u3phy,
> > + struct mt65xx_phy_instance *instance)
> > +{
> > + void __iomem *port_base = instance->port_base;
> > + u32 index = instance->index;
> > + u32 tmp;
> > +
> > + if (!index) {
> > + /* Set RG_SSUSB_VUSB10_ON as 1 after VUSB10 ready */
> > + tmp = readl(port_base + U3P_U3_PHYA_REG0);
> > + tmp |= P3A_RG_U3_VUSB10_ON;
> > + writel(tmp, port_base + U3P_U3_PHYA_REG0);
> > + }
> > +
> > + /* (force_suspendm=0) (let suspendm=1, enable usb 480MHz pll) */
> > + tmp = readl(port_base + U3P_U2PHYDTM0);
> > + tmp &= ~(P2C_FORCE_SUSPENDM | P2C_RG_XCVRSEL);
> > + tmp &= ~(P2C_RG_DATAIN | P2C_DTM0_PART_MASK);
> > + writel(tmp, port_base + U3P_U2PHYDTM0);
> > +
> > + /* OTG Enable */
> > + tmp = readl(port_base + U3P_USBPHYACR6);
> > + tmp |= PA6_RG_U2_OTG_VBUSCMP_EN;
> > + writel(tmp, port_base + U3P_USBPHYACR6);
> > +
> > + if (!index) {
> > + tmp = readl(u3phy->sif_base + U3P_XTALCTL3);
> > + tmp |= XC3_RG_U3_XTAL_RX_PWD | XC3_RG_U3_FRC_XTAL_RX_PWD;
> > + writel(tmp, u3phy->sif_base + U3P_XTALCTL3);
> > +
> > + /* [mt8173]disable Change 100uA current from SSUSB */
> > + tmp = readl(port_base + U3P_USBPHYACR5);
> > + tmp &= ~PA5_RG_U2_HS_100U_U3_EN;
> > + writel(tmp, port_base + U3P_USBPHYACR5);
> > + }
> > +
> > + tmp = readl(port_base + U3P_U2PHYDTM1);
> > + tmp |= P2C_RG_VBUSVALID | P2C_RG_AVALID;
> > + tmp &= ~P2C_RG_SESSEND;
> > + writel(tmp, port_base + U3P_U2PHYDTM1);
> > +
> > + /* USB 2.0 slew rate calibration */
> > + tmp = readl(port_base + U3P_USBPHYACR5);
> > + tmp &= ~PA5_RG_U2_HSTX_SRCTRL;
> > + tmp |= PA5_RG_U2_HSTX_SRCTRL_VAL(4);
> > + writel(tmp, port_base + U3P_USBPHYACR5);
> > +
> > + if (index) {
> > + tmp = readl(port_base + U3D_U2PHYDCR0);
> > + tmp |= P2C_RG_SIF_U2PLL_FORCE_ON;
> > + writel(tmp, port_base + U3D_U2PHYDCR0);
> > +
> > + tmp = readl(port_base + U3P_U2PHYDTM0);
> > + tmp |= P2C_RG_SUSPENDM | P2C_FORCE_SUSPENDM;
> > + writel(tmp, port_base + U3P_U2PHYDTM0);
> > + }
> > + dev_dbg(u3phy->dev, "%s(%d)\n", __func__, index);
> > +}
> > +
> > +static void phy_instance_power_off(struct mt65xx_u3phy *u3phy,
> > + struct mt65xx_phy_instance *instance)
> > +{
> > + void __iomem *port_base = instance->port_base;
> > + u32 index = instance->index;
> > + u32 tmp;
> > +
> > + tmp = readl(port_base + U3P_U2PHYDTM0);
> > + tmp &= ~(P2C_RG_XCVRSEL | P2C_RG_DATAIN);
> > + tmp |= P2C_FORCE_SUSPENDM;
> > + writel(tmp, port_base + U3P_U2PHYDTM0);
> > +
> > + /* OTG Disable */
> > + tmp = readl(port_base + U3P_USBPHYACR6);
> > + tmp &= ~PA6_RG_U2_OTG_VBUSCMP_EN;
> > + writel(tmp, port_base + U3P_USBPHYACR6);
> > +
> > + if (!index) {
> > + /* (also disable)Change 100uA current switch to USB2.0 */
> > + tmp = readl(port_base + U3P_USBPHYACR5);
> > + tmp &= ~PA5_RG_U2_HS_100U_U3_EN;
> > + writel(tmp, port_base + U3P_USBPHYACR5);
> > + }
> > +
> > + /* let suspendm=0, set utmi into analog power down */
> > + tmp = readl(port_base + U3P_U2PHYDTM0);
> > + tmp &= ~P2C_RG_SUSPENDM;
> > + writel(tmp, port_base + U3P_U2PHYDTM0);
> > + udelay(1);
> > +
> > + tmp = readl(port_base + U3P_U2PHYDTM1);
> > + tmp &= ~(P2C_RG_VBUSVALID | P2C_RG_AVALID);
> > + tmp |= P2C_RG_SESSEND;
> > + writel(tmp, port_base + U3P_U2PHYDTM1);
> > +
> > + if (!index) {
> > + tmp = readl(port_base + U3P_U3_PHYA_REG0);
> > + tmp &= ~P3A_RG_U3_VUSB10_ON;
> > + writel(tmp, port_base + U3P_U3_PHYA_REG0);
> > + } else {
> > + tmp = readl(port_base + U3D_U2PHYDCR0);
> > + tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
> > + writel(tmp, port_base + U3D_U2PHYDCR0);
> > + }
> > +
> > + dev_dbg(u3phy->dev, "%s(%d)\n", __func__, index);
> > +}
> > +
> > +static void phy_instance_exit(struct mt65xx_u3phy *u3phy,
> > + struct mt65xx_phy_instance *instance)
> > +{
> > + void __iomem *port_base = instance->port_base;
> > + u32 index = instance->index;
> > + u32 tmp;
> > +
> > + if (index) {
> > + tmp = readl(port_base + U3D_U2PHYDCR0);
> > + tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
> > + writel(tmp, port_base + U3D_U2PHYDCR0);
> > +
> > + tmp = readl(port_base + U3P_U2PHYDTM0);
> > + tmp &= ~P2C_FORCE_SUSPENDM;
> > + writel(tmp, port_base + U3P_U2PHYDTM0);
> > + }
> > +}
> > +
> > +static int mt65xx_phy_init(struct phy *phy)
> > +{
> > + struct mt65xx_phy_instance *instance = phy_get_drvdata(phy);
> > + struct mt65xx_u3phy *u3phy = dev_get_drvdata(phy->dev.parent);
> > + int ret;
> > +
> > + ret = clk_prepare_enable(u3phy->u3phya_ref);
> > + if (ret) {
> > + dev_err(u3phy->dev, "failed to enable u3phya_ref\n");
> > + return ret;
> > + }
> > +
> > + phy_instance_init(u3phy, instance);
> > + return 0;
> > +}
> > +
> > +static int mt65xx_phy_power_on(struct phy *phy)
> > +{
> > + struct mt65xx_phy_instance *instance = phy_get_drvdata(phy);
> > + struct mt65xx_u3phy *u3phy = dev_get_drvdata(phy->dev.parent);
> > +
> > + phy_instance_power_on(u3phy, instance);
> > + return 0;
> > +}
> > +
> > +static int mt65xx_phy_power_off(struct phy *phy)
> > +{
> > + struct mt65xx_phy_instance *instance = phy_get_drvdata(phy);
> > + struct mt65xx_u3phy *u3phy = dev_get_drvdata(phy->dev.parent);
> > +
> > + phy_instance_power_off(u3phy, instance);
> > + return 0;
> > +}
> > +
> > +static int mt65xx_phy_exit(struct phy *phy)
> > +{
> > + struct mt65xx_phy_instance *instance = phy_get_drvdata(phy);
> > + struct mt65xx_u3phy *u3phy = dev_get_drvdata(phy->dev.parent);
> > +
> > + phy_instance_exit(u3phy, instance);
> > + clk_disable_unprepare(u3phy->u3phya_ref);
> > + return 0;
> > +}
> > +
> > +static struct phy *mt65xx_phy_xlate(struct device *dev,
> > + struct of_phandle_args *args)
> > +{
> > + struct mt65xx_u3phy *u3phy = dev_get_drvdata(dev);
> > + struct mt65xx_phy_instance *instance = NULL;
> > + struct device_node *phy_np = args->np;
> > + int index;
> > +
> > +
> > + if (args->args_count != 1) {
> > + dev_err(dev, "invalid number of cells in 'phy' property\n");
> > + return ERR_PTR(-EINVAL);
> > + }
> > +
> > + for (index = 0; index < u3phy->nphys; index++)
> > + if (phy_np == u3phy->phys[index]->phy->dev.of_node) {
> > + instance = u3phy->phys[index];
> > + break;
> > + }
> > +
> > + if (!instance) {
> > + dev_err(dev, "failed to find appropriate phy\n");
> > + return ERR_PTR(-EINVAL);
> > + }
> > +
> > + instance->type = args->args[0];
> > +
> > + if (!(instance->type == PHY_TYPE_USB2 ||
> > + instance->type == PHY_TYPE_USB3)) {
> > + dev_err(dev, "unsupported device type: %d\n", instance->type);
> > + return ERR_PTR(-EINVAL);
> > + }
> > +
> > + return instance->phy;
> > +}
> > +
> > +static struct phy_ops mt65xx_u3phy_ops = {
> > + .init = mt65xx_phy_init,
> > + .exit = mt65xx_phy_exit,
> > + .power_on = mt65xx_phy_power_on,
> > + .power_off = mt65xx_phy_power_off,
> > + .owner = THIS_MODULE,
> > +};
> > +
> > +static int mt65xx_u3phy_probe(struct platform_device *pdev)
> > +{
> > + struct device *dev = &pdev->dev;
> > + struct device_node *np = dev->of_node;
> > + struct device_node *child_np;
> > + struct phy_provider *provider;
> > + struct resource *sif_res;
> > + struct mt65xx_u3phy *u3phy;
> > + struct resource res;
> > + int port;
> > +
> > + u3phy = devm_kzalloc(dev, sizeof(*u3phy), GFP_KERNEL);
> > + if (!u3phy)
> > + return -ENOMEM;
> > +
> > + u3phy->nphys = of_get_child_count(np);
> > + u3phy->phys = devm_kcalloc(dev, u3phy->nphys,
> > + sizeof(*u3phy->phys), GFP_KERNEL);
> > + if (!u3phy->phys)
> > + return -ENOMEM;
> > +
> > + u3phy->dev = dev;
> > + platform_set_drvdata(pdev, u3phy);
> > +
> > + sif_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > + u3phy->sif_base = devm_ioremap_resource(dev, sif_res);
> > + if (IS_ERR(u3phy->sif_base)) {
> > + dev_err(dev, "failed to remap sif regs\n");
> > + return PTR_ERR(u3phy->sif_base);
> > + }
> > +
> > + u3phy->u3phya_ref = devm_clk_get(dev, "u3phya_ref");
> > + if (IS_ERR(u3phy->u3phya_ref)) {
> > + dev_err(dev, "error to get u3phya_ref\n");
> > + return PTR_ERR(u3phy->u3phya_ref);
> > + }
> > +
> > + port = 0;
> > + for_each_child_of_node(np, child_np) {
> > + struct mt65xx_phy_instance *instance;
> > + struct phy *phy;
> > + int retval;
> > +
> > + instance = devm_kzalloc(dev, sizeof(*instance), GFP_KERNEL);
> > + if (!instance)
> > + return -ENOMEM;
> > +
> > + u3phy->phys[port] = instance;
> > +
> > + phy = devm_phy_create(dev, child_np, &mt65xx_u3phy_ops);
> > + if (IS_ERR(phy)) {
> > + dev_err(dev, "failed to create phy\n");
> > + return PTR_ERR(phy);
> > + }
> > +
> > + retval = of_address_to_resource(child_np, 0, &res);
> > + if (retval) {
> > + dev_err(dev, "failed to get address resource(id-%d)\n",
> > + port);
> > + return retval;
> > + }
> > +
> > + instance->port_base = devm_ioremap_resource(&phy->dev, &res);
> > + if (IS_ERR(instance->port_base)) {
> > + dev_err(dev, "failed to remap phy regs\n");
> > + return PTR_ERR(instance->port_base);
> > + }
> > +
> > + instance->phy = phy;
> > + instance->index = port;
> > + phy_set_drvdata(phy, instance);
> > + port++;
> > + }
> > +
> > + provider = devm_of_phy_provider_register(dev, mt65xx_phy_xlate);
> > +
> > + return PTR_ERR_OR_ZERO(provider);
> > +}
> > +
> > +static const struct of_device_id mt65xx_u3phy_id_table[] = {
> > + { .compatible = "mediatek,mt8173-u3phy", },
> > + { },
> > +};
> > +MODULE_DEVICE_TABLE(of, mt65xx_u3phy_id_table);
> > +
> > +static struct platform_driver mt65xx_u3phy_driver = {
> > + .probe = mt65xx_u3phy_probe,
> > + .driver = {
> > + .name = "mt65xx-u3phy",
> > + .of_match_table = mt65xx_u3phy_id_table,
> > + },
> > +};
> > +
> > +module_platform_driver(mt65xx_u3phy_driver);
> > +
> > +MODULE_AUTHOR("Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>");
> > +MODULE_DESCRIPTION("mt65xx USB PHY driver");
> > +MODULE_LICENSE("GPL v2");
> >

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