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charset="utf-8" As per the RZ/V2H(P) HW manual, VBUSEN can be controlled by the VBUS_SEL bit of the VBENCTL Control Register. This register is mapped in the reset framework. The reset driver expose this register as mux-controller and instantiates this driver. The consumer will use the mux API to control the VBUS_SEL bit. Reviewed-by: Philipp Zabel Signed-off-by: Tommaso Merciai --- v8->v9: - Fixed driver comment year (2025 -> 2026) - Switch from devm_regmap_init_mmio() to dev_get_regmap(). - Drop unnecessasry include bitops.h, of.h, property.h and drivers/reset/reset-rzv2h-usb2phy.h headers, driver is now based on regm= ap. - Collected PZabel tag. v7->v8: - No changes. v6->v7: - No changes. v5->v6: - No changes. v4->v5: - Changed file name to rzv2h-usb-vbenctl.c and Fixed Makefile, Kconfig, function names accordingly. - Changed driver .name to "vbenctl" and fix auxiliary_device_id name. - Updated commit msg. v3->v4: - Removed mux_chip->dev.of_node not needed. v2->v3: - Added mux_chip->dev.of_node =3D dev->of_node->child as the mux-controller is an internal node. - Fixed auxiliary_device_id name. - Get rdev using from platform_data. - Drop struct auxiliary_device adev from reset_rzv2h_usb2phy_adev as it is needed. - Drop to_reset_rzv2h_usb2phy_adev() as it is not needed. v1->v2: - New patch drivers/mux/Kconfig | 11 +++++ drivers/mux/Makefile | 2 + drivers/mux/rzv2h-usb-vbenctl.c | 85 +++++++++++++++++++++++++++++++++ 3 files changed, 98 insertions(+) create mode 100644 drivers/mux/rzv2h-usb-vbenctl.c diff --git a/drivers/mux/Kconfig b/drivers/mux/Kconfig index 6d17dfa25dad..7f334540c189 100644 --- a/drivers/mux/Kconfig +++ b/drivers/mux/Kconfig @@ -70,6 +70,17 @@ config MUX_MMIO To compile the driver as a module, choose M here: the module will be called mux-mmio. =20 +config MUX_RZV2H_USB_VBENCTL + tristate "Renesas RZ/V2H USB VBENCTL VBUS_SEL mux driver" + depends on RESET_RZV2H_USB2PHY || COMPILE_TEST + depends on OF + select REGMAP + select AUXILIARY_BUS + default RESET_RZV2H_USB2PHY + help + Support for USB VBENCTL VBUS_SEL mux implemented on Renesas + RZ/V2H SoCs. + endmenu =20 endif # MULTIPLEXER diff --git a/drivers/mux/Makefile b/drivers/mux/Makefile index 6e9fa47daf56..3bd9b3846835 100644 --- a/drivers/mux/Makefile +++ b/drivers/mux/Makefile @@ -8,9 +8,11 @@ mux-adg792a-objs :=3D adg792a.o mux-adgs1408-objs :=3D adgs1408.o mux-gpio-objs :=3D gpio.o mux-mmio-objs :=3D mmio.o +mux-rzv2h-usb-vbenctl-objs :=3D rzv2h-usb-vbenctl.o =20 obj-$(CONFIG_MULTIPLEXER) +=3D mux-core.o obj-$(CONFIG_MUX_ADG792A) +=3D mux-adg792a.o obj-$(CONFIG_MUX_ADGS1408) +=3D mux-adgs1408.o obj-$(CONFIG_MUX_GPIO) +=3D mux-gpio.o obj-$(CONFIG_MUX_MMIO) +=3D mux-mmio.o +obj-$(CONFIG_MUX_RZV2H_USB_VBENCTL) +=3D mux-rzv2h-usb-vbenctl.o diff --git a/drivers/mux/rzv2h-usb-vbenctl.c b/drivers/mux/rzv2h-usb-vbenct= l.c new file mode 100644 index 000000000000..79197fddbf74 --- /dev/null +++ b/drivers/mux/rzv2h-usb-vbenctl.c @@ -0,0 +1,85 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Renesas RZ/V2H(P) USB VBENCTL VBUS_SEL mux driver + * + * Copyright (C) 2026 Renesas Electronics Corp. + */ + +#include +#include +#include +#include +#include + +#define RZV2H_VBENCTL 0xf0c + +struct mux_rzv2h_usb_vbenctl_priv { + struct regmap_field *field; +}; + +static int mux_rzv2h_usb_vbenctl_set(struct mux_control *mux, int state) +{ + struct mux_rzv2h_usb_vbenctl_priv *priv =3D mux_chip_priv(mux->chip); + + return regmap_field_write(priv->field, state); +} + +static const struct mux_control_ops mux_rzv2h_usb_vbenctl_ops =3D { + .set =3D mux_rzv2h_usb_vbenctl_set, +}; + +static int mux_rzv2h_usb_vbenctl_probe(struct auxiliary_device *adev, + const struct auxiliary_device_id *id) +{ + struct mux_rzv2h_usb_vbenctl_priv *priv; + struct device *dev =3D &adev->dev; + struct mux_chip *mux_chip; + struct regmap *regmap; + struct reg_field reg_field =3D { + .reg =3D RZV2H_VBENCTL, + .lsb =3D 0, + .msb =3D 0, + }; + int ret; + + regmap =3D dev_get_regmap(adev->dev.parent, NULL); + if (!regmap) + return -ENODEV; + + mux_chip =3D devm_mux_chip_alloc(dev, 1, sizeof(*priv)); + if (IS_ERR(mux_chip)) + return PTR_ERR(mux_chip); + + priv =3D mux_chip_priv(mux_chip); + + priv->field =3D devm_regmap_field_alloc(dev, regmap, reg_field); + if (IS_ERR(priv->field)) + return PTR_ERR(priv->field); + + mux_chip->ops =3D &mux_rzv2h_usb_vbenctl_ops; + mux_chip->mux[0].states =3D 2; + mux_chip->mux[0].idle_state =3D MUX_IDLE_AS_IS; + + ret =3D devm_mux_chip_register(dev, mux_chip); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to register mux chip\n"); + + return 0; +} + +static const struct auxiliary_device_id mux_rzv2h_usb_vbenctl_ids[] =3D { + { .name =3D "rzv2h_usb2phy_reset.vbenctl" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(auxiliary, mux_rzv2h_usb_vbenctl_ids); + +static struct auxiliary_driver mux_rzv2h_usb_vbenctl_driver =3D { + .name =3D "vbenctl", + .probe =3D mux_rzv2h_usb_vbenctl_probe, + .id_table =3D mux_rzv2h_usb_vbenctl_ids, +}; +module_auxiliary_driver(mux_rzv2h_usb_vbenctl_driver); + +MODULE_DESCRIPTION("RZ/V2H USB VBENCTL VBUS_SEL mux driver"); +MODULE_AUTHOR("Tommaso Merciai "); +MODULE_LICENSE("GPL"); --=20 2.43.0