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charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20261106-mt2824-v1-22-86087eaf5af4@bootlin.com> References: <20261106-mt2824-v1-0-86087eaf5af4@bootlin.com> In-Reply-To: <20261106-mt2824-v1-0-86087eaf5af4@bootlin.com> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jun Chang , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Philipp Zabel , Sebastian Reichel , Vinod Koul , Neil Armstrong , Manivannan Sadhasivam , Conor Dooley , Jonathan Cameron , Lad Prabhakar , Thomas Gleixner , Radu Rendec , Samuel Holland , Ben Zong-You Xie , Daniel Lezcano , Ulf Hansson , Jisheng Zhang , CL Wang , Mark Brown , Greg Kroah-Hartman , Wim Van Sebroeck , Guenter Roeck , Adrian Hunter , Minas Harutyunyan Cc: Thomas Petazzoni , =?utf-8?q?Randolph_Sheng-Kai_Lin=28=E6=9E=97=E8=81=96=E5=87=B1=29?= , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-pm@vger.kernel.org, linux-phy@lists.infradead.org, Paul Walmsley , linux-mmc@vger.kernel.org, linux-spi@vger.kernel.org, linux-usb@vger.kernel.org, linux-watchdog@vger.kernel.org, =?utf-8?q?Beno=C3=AEt_Monin?= X-Mailer: b4 0.16.0 X-Last-TLS-Session-Version: TLSv1.3 Add a minimal reset-only PHY provider for the Metanoia MT2824 USB2 PHY. It deasserts the PHY reset required by the DWC2 USB controller on init and asserts it again on exit. Originally-by: Jun Chang Signed-off-by: Benoît Monin --- drivers/phy/Kconfig | 1 + drivers/phy/Makefile | 1 + drivers/phy/metanoia/Kconfig | 16 ++++++++ drivers/phy/metanoia/Makefile | 3 ++ drivers/phy/metanoia/phy-usb2.c | 88 +++++++++++++++++++++++++++++++++++++++++ 5 files changed, 109 insertions(+) diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 105fbe408aa2..73ef61f1f53d 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -184,6 +184,7 @@ source "drivers/phy/intel/Kconfig" source "drivers/phy/lantiq/Kconfig" source "drivers/phy/marvell/Kconfig" source "drivers/phy/mediatek/Kconfig" +source "drivers/phy/metanoia/Kconfig" source "drivers/phy/microchip/Kconfig" source "drivers/phy/motorola/Kconfig" source "drivers/phy/mscc/Kconfig" diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index c6dd02003bbe..57991b50978c 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -36,6 +36,7 @@ obj-$(CONFIG_GENERIC_PHY) += allwinner/ \ lantiq/ \ marvell/ \ mediatek/ \ + metanoia/ \ microchip/ \ motorola/ \ mscc/ \ diff --git a/drivers/phy/metanoia/Kconfig b/drivers/phy/metanoia/Kconfig new file mode 100644 index 000000000000..b8a49085bb95 --- /dev/null +++ b/drivers/phy/metanoia/Kconfig @@ -0,0 +1,16 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Phy drivers for Metanoia platforms +# + +config PHY_METANOIA_USB2 + tristate "Metanoia USB2 PHY reset support" + depends on OF && (ARCH_METANOIA || COMPILE_TEST) + depends on RESET_CONTROLLER + select GENERIC_PHY + help + Enable this to support the USB2 PHY reset block that is part + of Metanoia SoCs. + + This driver only toggles the reset line of the PHY needed by + the DWC2 USB controller. diff --git a/drivers/phy/metanoia/Makefile b/drivers/phy/metanoia/Makefile new file mode 100644 index 000000000000..ce1b5f8af15d --- /dev/null +++ b/drivers/phy/metanoia/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0 + +obj-$(CONFIG_PHY_METANOIA_USB2) += phy-usb2.o diff --git a/drivers/phy/metanoia/phy-usb2.c b/drivers/phy/metanoia/phy-usb2.c new file mode 100644 index 000000000000..b06d423eada7 --- /dev/null +++ b/drivers/phy/metanoia/phy-usb2.c @@ -0,0 +1,88 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2026 Metanoia Communications Inc. + * + * Author: Jun Chang + */ + +#include +#include +#include +#include +#include + +struct metanoia_usb2phy { + struct reset_control *reset; +}; + +static int metanoia_usb2phy_init(struct phy *phy) +{ + struct metanoia_usb2phy *priv = phy_get_drvdata(phy); + int ret; + + ret = reset_control_deassert(priv->reset); + if (ret) + dev_err(&phy->dev, "failed to reset phy: %d\n", ret); + + return ret; +} + +static int metanoia_usb2phy_exit(struct phy *phy) +{ + struct metanoia_usb2phy *priv = phy_get_drvdata(phy); + + return reset_control_assert(priv->reset); +} + +static const struct phy_ops metanoia_usb2phy_ops = { + .init = metanoia_usb2phy_init, + .exit = metanoia_usb2phy_exit, + .owner = THIS_MODULE, +}; + +static int metanoia_usb2phy_probe(struct platform_device *pdev) +{ + struct phy_provider *phy_provider; + struct device *dev = &pdev->dev; + struct metanoia_usb2phy *priv; + struct phy *phy; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->reset = devm_reset_control_get_exclusive(dev, "usb2-phy"); + if (IS_ERR(priv->reset)) + return dev_err_probe(dev, PTR_ERR(priv->reset), + "failed to get usb2-phy reset\n"); + + phy = devm_phy_create(dev, NULL, &metanoia_usb2phy_ops); + if (IS_ERR(phy)) + return dev_err_probe(dev, PTR_ERR(phy), + "failed to create usb2 phy\n"); + + 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 metanoia_usb2phy_of_match[] = { + { .compatible = "metanoia,mt2824-usb2-phy" }, + {} +}; +MODULE_DEVICE_TABLE(of, metanoia_usb2phy_of_match); + +static struct platform_driver metanoia_usb2phy_driver = { + .probe = metanoia_usb2phy_probe, + .driver = { + .name = "metanoia-usb2-phy", + .of_match_table = metanoia_usb2phy_of_match, + }, +}; +module_platform_driver(metanoia_usb2phy_driver); + +MODULE_DESCRIPTION("Metanoia USB2 PHY driver"); +MODULE_AUTHOR("Jun Chang "); +MODULE_LICENSE("GPL"); -- 2.56.0