diff options
| -rw-r--r-- | MAINTAINERS | 8 | ||||
| -rw-r--r-- | drivers/phy/qualcomm/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/phy/qualcomm/Makefile | 1 | ||||
| -rw-r--r-- | drivers/phy/qualcomm/phy-ath79-usb.c | 108 |
4 files changed, 127 insertions, 1 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 0a1410d5a621..7561bd48f011 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2326,6 +2326,14 @@ S: Maintained F: drivers/gpio/gpio-ath79.c F: Documentation/devicetree/bindings/gpio/gpio-ath79.txt +ATHEROS 71XX/9XXX USB PHY DRIVER +M: Alban Bedel <albeu@free.fr> +W: https://github.com/AlbanBedel/linux +T: git git://github.com/AlbanBedel/linux +S: Maintained +F: drivers/phy/qualcomm/phy-ath79-usb.c +F: Documentation/devicetree/bindings/phy/phy-ath79-usb.txt + ATHEROS ATH GENERIC UTILITIES M: "Luis R. Rodriguez" <mcgrof@do-not-panic.com> L: linux-wireless@vger.kernel.org diff --git a/drivers/phy/qualcomm/Kconfig b/drivers/phy/qualcomm/Kconfig index 7bfa64baf837..632a0e73ee10 100644 --- a/drivers/phy/qualcomm/Kconfig +++ b/drivers/phy/qualcomm/Kconfig @@ -1,6 +1,15 @@ # -# Phy drivers for Qualcomm platforms +# Phy drivers for Qualcomm and Atheros platforms # +config PHY_ATH79_USB + tristate "Atheros AR71XX/9XXX USB PHY driver" + depends on OF && (ATH79 || COMPILE_TEST) + default y if USB_EHCI_HCD_PLATFORM || USB_OHCI_HCD_PLATFORM + select RESET_CONTROLLER + select GENERIC_PHY + help + Enable this to support the USB PHY on Atheros AR71XX/9XXX SoCs. + config PHY_QCOM_APQ8064_SATA tristate "Qualcomm APQ8064 SATA SerDes/PHY driver" depends on ARCH_QCOM diff --git a/drivers/phy/qualcomm/Makefile b/drivers/phy/qualcomm/Makefile index 9abb7899762a..deb831f453ae 100644 --- a/drivers/phy/qualcomm/Makefile +++ b/drivers/phy/qualcomm/Makefile @@ -1,4 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_PHY_ATH79_USB) += phy-ath79-usb.o obj-$(CONFIG_PHY_QCOM_APQ8064_SATA) += phy-qcom-apq8064-sata.o obj-$(CONFIG_PHY_QCOM_IPQ806X_SATA) += phy-qcom-ipq806x-sata.o obj-$(CONFIG_PHY_QCOM_QMP) += phy-qcom-qmp.o diff --git a/drivers/phy/qualcomm/phy-ath79-usb.c b/drivers/phy/qualcomm/phy-ath79-usb.c new file mode 100644 index 000000000000..6fd6e07ab345 --- /dev/null +++ b/drivers/phy/qualcomm/phy-ath79-usb.c @@ -0,0 +1,108 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Atheros AR71XX/9XXX USB PHY driver + * + * Copyright (C) 2015-2018 Alban Bedel <albeu@free.fr> + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/phy/phy.h> +#include <linux/reset.h> + +struct ath79_usb_phy { + struct reset_control *reset; + /* The suspend override logic is inverted, hence the no prefix + * to make the code a bit easier to understand. + */ + struct reset_control *no_suspend_override; +}; + +static int ath79_usb_phy_power_on(struct phy *phy) +{ + struct ath79_usb_phy *priv = phy_get_drvdata(phy); + int err = 0; + + if (priv->no_suspend_override) { + err = reset_control_assert(priv->no_suspend_override); + if (err) + return err; + } + + err = reset_control_deassert(priv->reset); + if (err && priv->no_suspend_override) + reset_control_assert(priv->no_suspend_override); + + return err; +} + +static int ath79_usb_phy_power_off(struct phy *phy) +{ + struct ath79_usb_phy *priv = phy_get_drvdata(phy); + int err = 0; + + err = reset_control_assert(priv->reset); + if (err) + return err; + + if (priv->no_suspend_override) { + err = reset_control_deassert(priv->no_suspend_override); + if (err) + reset_control_deassert(priv->reset); + } + + return err; +} + +static const struct phy_ops ath79_usb_phy_ops = { + .power_on = ath79_usb_phy_power_on, + .power_off = ath79_usb_phy_power_off, + .owner = THIS_MODULE, +}; + +static int ath79_usb_phy_probe(struct platform_device *pdev) +{ + struct ath79_usb_phy *priv; + struct phy *phy; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->reset = devm_reset_control_get(&pdev->dev, "usb-phy"); + if (IS_ERR(priv->reset)) + return PTR_ERR(priv->reset); + + priv->no_suspend_override = devm_reset_control_get_optional( + &pdev->dev, "usb-suspend-override"); + if (IS_ERR(priv->no_suspend_override)) + return PTR_ERR(priv->no_suspend_override); + + phy = devm_phy_create(&pdev->dev, NULL, &ath79_usb_phy_ops); + if (IS_ERR(phy)) + return PTR_ERR(phy); + + phy_set_drvdata(phy, priv); + + return PTR_ERR_OR_ZERO(devm_of_phy_provider_register( + &pdev->dev, of_phy_simple_xlate)); +} + +static const struct of_device_id ath79_usb_phy_of_match[] = { + { .compatible = "qca,ar7100-usb-phy" }, + {} +}; +MODULE_DEVICE_TABLE(of, ath79_usb_phy_of_match); + +static struct platform_driver ath79_usb_phy_driver = { + .probe = ath79_usb_phy_probe, + .driver = { + .of_match_table = ath79_usb_phy_of_match, + .name = "ath79-usb-phy", + } +}; +module_platform_driver(ath79_usb_phy_driver); + +MODULE_DESCRIPTION("ATH79 USB PHY driver"); +MODULE_AUTHOR("Alban Bedel <albeu@free.fr>"); +MODULE_LICENSE("GPL"); |
