From: Quanyang Wang <quanyang.w...@windriver.com>
This driver is for generic ulpi usb phys.
Signed-off-by: Quanyang Wang <quanyang.w...@windriver.com>
---
drivers/usb/phy/Kconfig | 8 ++++
drivers/usb/phy/Makefile | 1 +
drivers/usb/phy/phy-ulpi-generic.c | 76 ++++++++++++++++++++++++++++++
3 files changed, 85 insertions(+)
create mode 100644 drivers/usb/phy/phy-ulpi-generic.c
diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
index 52eebcb88c1f..d602269019e6 100644
--- a/drivers/usb/phy/Kconfig
+++ b/drivers/usb/phy/Kconfig
@@ -62,6 +62,14 @@ config NOP_USB_XCEIV
built-in with usb ip or which are autonomous and doesn't require any
phy programming such as ISP1x04 etc.
+config USB_ULPI_GENERIC
+ tristate "USB ULPI Generic Transceiver Driver"
+ depends on USB_GADGET || !USB_GADGET # if USB_GADGET=m, NOP can't be
built-in
+ select USB_ULPI
+ select USB_PHY
+ help
+ This driver is for USB ulpi phys.
+
config AM335X_CONTROL_USB
tristate
diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
index b352bdbe8712..02337f143fd0 100644
--- a/drivers/usb/phy/Makefile
+++ b/drivers/usb/phy/Makefile
@@ -25,3 +25,4 @@ obj-$(CONFIG_USB_ULPI) += phy-ulpi.o
obj-$(CONFIG_USB_ULPI_VIEWPORT) += phy-ulpi-viewport.o
obj-$(CONFIG_KEYSTONE_USB_PHY) += phy-keystone.o
obj-$(CONFIG_JZ4770_PHY) += phy-jz4770.o
+obj-$(CONFIG_USB_ULPI_GENERIC) += phy-ulpi-generic.o
diff --git a/drivers/usb/phy/phy-ulpi-generic.c
b/drivers/usb/phy/phy-ulpi-generic.c
new file mode 100644
index 000000000000..a54512a4e1b2
--- /dev/null
+++ b/drivers/usb/phy/phy-ulpi-generic.c
@@ -0,0 +1,76 @@
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/usb/ulpi.h>
+
+static int ulpi_generic_probe(struct platform_device *pdev)
+{
+ struct usb_phy *phy;
+ int flags = 0;
+ int ret;
+
+ ret = of_property_read_u32(pdev->dev.of_node, "usb-ulpi-flags", &flags);
+ if (ret) {
+ dev_warn(&pdev->dev, "No usb-ulpi-flags property!\n");
+ }
+
+ phy = devm_otg_ulpi_create(&pdev->dev, &ulpi_viewport_access_ops,
flags);
+ if (!phy) {
+ dev_err(&pdev->dev, "Failed to create ULPI OTG phy.\n");
+ return -ENOMEM;
+ }
+
+ phy->dev = &pdev->dev;
+
+ ret = usb_add_phy_dev(phy);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to add ULPI OTG phy.\n");
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, phy);
+
+ return 0;
+}
+
+static int ulpi_generic_remove(struct platform_device *pdev)
+{
+ struct usb_phy *phy = platform_get_drvdata(pdev);
+
+ usb_remove_phy(phy);
+
+ return 0;
+}
+
+static const struct of_device_id generic_ulpi_dt_ids[] = {
+ { .compatible = "usb-phy-ulpi-generic" },
+ { }
+};
+
+MODULE_DEVICE_TABLE(of, generic_ulpi_dt_ids);
+
+static struct platform_driver ulpi_generic_driver = {
+ .probe = ulpi_generic_probe,
+ .remove = ulpi_generic_remove,
+ .driver = {
+ .name = "usb_phy_ulpi_generic",
+ .of_match_table = generic_ulpi_dt_ids,
+ },
+};
+
+static int __init ulpi_generic_init(void)
+{
+ return platform_driver_register(&ulpi_generic_driver);
+}
+subsys_initcall(ulpi_generic_init);
+
+static void __exit ulpi_generic_exit(void)
+{
+ platform_driver_unregister(&ulpi_generic_driver);
+}
+module_exit(ulpi_generic_exit);
+
+MODULE_ALIAS("platform:usb_phy_ulpi_generic");
+MODULE_AUTHOR("Wind River Systems Inc");
+MODULE_DESCRIPTION("Generic ULPI PHY Transceiver driver");
+MODULE_LICENSE("GPL");
--
2.36.1
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