diff options
| -rw-r--r-- | drivers/phy/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/phy/Makefile | 1 | ||||
| -rw-r--r-- | drivers/phy/freescale/Kconfig | 5 | ||||
| -rw-r--r-- | drivers/phy/freescale/Makefile | 1 | ||||
| -rw-r--r-- | drivers/phy/freescale/phy-fsl-imx8mq-usb.c | 127 |
5 files changed, 135 insertions, 0 deletions
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 60f949e2a684..eaf0778a18d4 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -44,6 +44,7 @@ source "drivers/phy/allwinner/Kconfig" source "drivers/phy/amlogic/Kconfig" source "drivers/phy/broadcom/Kconfig" source "drivers/phy/cadence/Kconfig" +source "drivers/phy/freescale/Kconfig" source "drivers/phy/hisilicon/Kconfig" source "drivers/phy/lantiq/Kconfig" source "drivers/phy/marvell/Kconfig" diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 0301e25d07c1..84acb3761457 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip/ obj-$(CONFIG_ARCH_TEGRA) += tegra/ obj-y += broadcom/ \ cadence/ \ + freescale/ \ hisilicon/ \ marvell/ \ motorola/ \ diff --git a/drivers/phy/freescale/Kconfig b/drivers/phy/freescale/Kconfig new file mode 100644 index 000000000000..f050bd4e97e0 --- /dev/null +++ b/drivers/phy/freescale/Kconfig @@ -0,0 +1,5 @@ +config PHY_FSL_IMX8MQ_USB + tristate "Freescale i.MX8M USB3 PHY" + depends on OF && HAS_IOMEM + select GENERIC_PHY + default SOC_IMX8MQ diff --git a/drivers/phy/freescale/Makefile b/drivers/phy/freescale/Makefile new file mode 100644 index 000000000000..dc2b3f1f2f80 --- /dev/null +++ b/drivers/phy/freescale/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_PHY_FSL_IMX8MQ_USB) += phy-fsl-imx8mq-usb.o diff --git a/drivers/phy/freescale/phy-fsl-imx8mq-usb.c b/drivers/phy/freescale/phy-fsl-imx8mq-usb.c new file mode 100644 index 000000000000..d6ea5ce8afa5 --- /dev/null +++ b/drivers/phy/freescale/phy-fsl-imx8mq-usb.c @@ -0,0 +1,127 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* Copyright (c) 2017 NXP. */ + +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/phy/phy.h> +#include <linux/platform_device.h> + +#define PHY_CTRL0 0x0 +#define PHY_CTRL0_REF_SSP_EN BIT(2) + +#define PHY_CTRL1 0x4 +#define PHY_CTRL1_RESET BIT(0) +#define PHY_CTRL1_COMMONONN BIT(1) +#define PHY_CTRL1_ATERESET BIT(3) +#define PHY_CTRL1_VDATSRCENB0 BIT(19) +#define PHY_CTRL1_VDATDETENB0 BIT(20) + +#define PHY_CTRL2 0x8 +#define PHY_CTRL2_TXENABLEN0 BIT(8) + +struct imx8mq_usb_phy { + struct phy *phy; + struct clk *clk; + void __iomem *base; +}; + +static int imx8mq_usb_phy_init(struct phy *phy) +{ + struct imx8mq_usb_phy *imx_phy = phy_get_drvdata(phy); + u32 value; + + value = readl(imx_phy->base + PHY_CTRL1); + value &= ~(PHY_CTRL1_VDATSRCENB0 | PHY_CTRL1_VDATDETENB0 | + PHY_CTRL1_COMMONONN); + value |= PHY_CTRL1_RESET | PHY_CTRL1_ATERESET; + writel(value, imx_phy->base + PHY_CTRL1); + + value = readl(imx_phy->base + PHY_CTRL0); + value |= PHY_CTRL0_REF_SSP_EN; + writel(value, imx_phy->base + PHY_CTRL0); + + value = readl(imx_phy->base + PHY_CTRL2); + value |= PHY_CTRL2_TXENABLEN0; + writel(value, imx_phy->base + PHY_CTRL2); + + value = readl(imx_phy->base + PHY_CTRL1); + value &= ~(PHY_CTRL1_RESET | PHY_CTRL1_ATERESET); + writel(value, imx_phy->base + PHY_CTRL1); + + return 0; +} + +static int imx8mq_phy_power_on(struct phy *phy) +{ + struct imx8mq_usb_phy *imx_phy = phy_get_drvdata(phy); + + return clk_prepare_enable(imx_phy->clk); +} + +static int imx8mq_phy_power_off(struct phy *phy) +{ + struct imx8mq_usb_phy *imx_phy = phy_get_drvdata(phy); + + clk_disable_unprepare(imx_phy->clk); + + return 0; +} + +static struct phy_ops imx8mq_usb_phy_ops = { + .init = imx8mq_usb_phy_init, + .power_on = imx8mq_phy_power_on, + .power_off = imx8mq_phy_power_off, + .owner = THIS_MODULE, +}; + +static int imx8mq_usb_phy_probe(struct platform_device *pdev) +{ + struct phy_provider *phy_provider; + struct device *dev = &pdev->dev; + struct imx8mq_usb_phy *imx_phy; + struct resource *res; + + imx_phy = devm_kzalloc(dev, sizeof(*imx_phy), GFP_KERNEL); + if (!imx_phy) + return -ENOMEM; + + imx_phy->clk = devm_clk_get(dev, "phy"); + if (IS_ERR(imx_phy->clk)) { + dev_err(dev, "failed to get imx8mq usb phy clock\n"); + return PTR_ERR(imx_phy->clk); + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + imx_phy->base = devm_ioremap_resource(dev, res); + if (IS_ERR(imx_phy->base)) + return PTR_ERR(imx_phy->base); + + imx_phy->phy = devm_phy_create(dev, NULL, &imx8mq_usb_phy_ops); + if (IS_ERR(imx_phy->phy)) + return PTR_ERR(imx_phy->phy); + + phy_set_drvdata(imx_phy->phy, imx_phy); + + 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 imx8mq_usb_phy_of_match[] = { + {.compatible = "fsl,imx8mq-usb-phy",}, + { }, +}; +MODULE_DEVICE_TABLE(of, imx8mq_usb_phy_of_match); + +static struct platform_driver imx8mq_usb_phy_driver = { + .probe = imx8mq_usb_phy_probe, + .driver = { + .name = "imx8mq-usb-phy", + .of_match_table = imx8mq_usb_phy_of_match, + } +}; +module_platform_driver(imx8mq_usb_phy_driver); + +MODULE_DESCRIPTION("FSL IMX8MQ USB PHY driver"); +MODULE_LICENSE("GPL"); |