This patch adds USB PHY driver for MediaTek MT7620 SoC
Reviewed-by: Stefan Roese sr@denx.de Signed-off-by: Weijie Gao weijie.gao@mediatek.com --- v4 changes: none v3 changes: remove duplicated dev field in mt7620_usb_phy v2 changes: none --- drivers/phy/Kconfig | 7 +++ drivers/phy/Makefile | 1 + drivers/phy/mt7620-usb-phy.c | 110 +++++++++++++++++++++++++++++++++++ 3 files changed, 118 insertions(+) create mode 100644 drivers/phy/mt7620-usb-phy.c
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index d12a6b02ad..ab638f0e7d 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -218,6 +218,13 @@ config KEYSTONE_USB_PHY
This PHY is found on some Keystone (K2) devices supporting USB.
+config MT7620_USB_PHY + bool "MediaTek MT7620 USB PHY support" + depends on PHY + depends on SOC_MT7620 + help + Support the intergated USB PHY in MediaTek MT7620 SoC + config MT76X8_USB_PHY bool "MediaTek MT76x8 (7628/88) USB PHY support" depends on PHY diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 45a7fe5b56..6b3761b8c8 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -24,6 +24,7 @@ obj-$(CONFIG_MESON_G12A_USB_PHY) += meson-g12a-usb2.o meson-g12a-usb3-pcie.o obj-$(CONFIG_MSM8916_USB_PHY) += msm8916-usbh-phy.o obj-$(CONFIG_OMAP_USB2_PHY) += omap-usb2-phy.o obj-$(CONFIG_KEYSTONE_USB_PHY) += keystone-usb-phy.o +obj-$(CONFIG_MT7620_USB_PHY) += mt7620-usb-phy.o obj-$(CONFIG_MT76X8_USB_PHY) += mt76x8-usb-phy.o obj-$(CONFIG_PHY_DA8XX_USB) += phy-da8xx-usb.o obj-$(CONFIG_PHY_MTK_TPHY) += phy-mtk-tphy.o diff --git a/drivers/phy/mt7620-usb-phy.c b/drivers/phy/mt7620-usb-phy.c new file mode 100644 index 0000000000..8320df177d --- /dev/null +++ b/drivers/phy/mt7620-usb-phy.c @@ -0,0 +1,110 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020 MediaTek Inc. All Rights Reserved. + * + * Author: Weijie Gao weijie.gao@mediatek.com + */ + +#include <clk.h> +#include <dm.h> +#include <generic-phy.h> +#include <misc.h> +#include <reset.h> +#include <dm/device_compat.h> +#include <linux/delay.h> +#include <mach/mt7620-sysc.h> + +struct mt7620_usb_phy { + struct udevice *sysc; + struct clk_bulk clocks; + struct reset_ctl_bulk resets; +}; + +static int mt7620_usb_phy_power_on(struct phy *_phy) +{ + struct mt7620_usb_phy *phy = dev_get_priv(_phy->dev); + u32 mode = MT7620_SYSC_USB_HOST_MODE; + int ret; + + reset_deassert_bulk(&phy->resets); + + clk_enable_bulk(&phy->clocks); + + mdelay(10); + + ret = misc_ioctl(phy->sysc, MT7620_SYSC_IOCTL_SET_USB_MODE, &mode); + if (ret) { + dev_err(_phy->dev, + "mt7620_usbphy: failed to set USB host mode\n"); + return ret; + } + + mdelay(10); + + return 0; +} + +static int mt7620_usb_phy_power_off(struct phy *_phy) +{ + struct mt7620_usb_phy *phy = dev_get_priv(_phy->dev); + + clk_disable_bulk(&phy->clocks); + + reset_assert_bulk(&phy->resets); + + return 0; +} + +static int mt7620_usb_phy_probe(struct udevice *dev) +{ + struct mt7620_usb_phy *phy = dev_get_priv(dev); + struct ofnode_phandle_args sysc_args; + int ret; + + ret = ofnode_parse_phandle_with_args(dev->node, "mediatek,sysc", NULL, + 0, 0, &sysc_args); + if (ret) { + dev_err(dev, "mt7620_usbphy: sysc property not found\n"); + return ret; + } + + ret = uclass_get_device_by_ofnode(UCLASS_MISC, sysc_args.node, + &phy->sysc); + if (ret) { + dev_err(dev, "mt7620_usbphy: failed to sysc device\n"); + return ret; + } + + ret = clk_get_bulk(dev, &phy->clocks); + if (ret) { + dev_err(dev, "mt7620_usbphy: failed to get clocks\n"); + return ret; + } + + ret = reset_get_bulk(dev, &phy->resets); + if (ret) { + dev_err(dev, "mt7620_usbphy: failed to get reset control\n"); + return ret; + } + + return 0; +} + +static struct phy_ops mt7620_usb_phy_ops = { + .power_on = mt7620_usb_phy_power_on, + .power_off = mt7620_usb_phy_power_off, +}; + +static const struct udevice_id mt7620_usb_phy_ids[] = { + { .compatible = "mediatek,mt7620-usbphy" }, + { } +}; + +U_BOOT_DRIVER(mt7620_usb_phy) = { + .name = "mt7620_usb_phy", + .id = UCLASS_PHY, + .of_match = mt7620_usb_phy_ids, + .ops = &mt7620_usb_phy_ops, + .probe = mt7620_usb_phy_probe, + .priv_auto_alloc_size = sizeof(struct mt7620_usb_phy), +};