On 8/30/2024 4:20 PM, Dmitry Baryshkov wrote:
The NXP PTN3222 is the single-port eUSB2 to USB2 redriver that performs
translation between eUSB2 and USB2 signalling schemes. It supports all
three data rates: Low Speed, Full Speed and High Speed.
The reset state enables autonegotiation of the PHY role and of the data
rate, so no additional programming is required.
Reviewed-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Tested-by: Konrad Dybcio <konradybcio@xxxxxxxxxx>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
drivers/phy/Kconfig | 11 ++++
drivers/phy/Makefile | 1 +
drivers/phy/phy-nxp-ptn3222.c | 123 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 135 insertions(+)
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index dfab1c66b3e5..cb06a7f79740 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -82,6 +82,17 @@ config PHY_AIROHA_PCIE
This driver create the basic PHY instance and provides initialize
callback for PCIe GEN3 port.
+config PHY_NXP_PTN3222
+ tristate "NXP PTN3222 1-port eUSB2 to USB2 redriver"
+ depends on I2C
+ depends on OF
+ select GENERIC_PHY
+ help
+ Enable this to support NXP PTN3222 1-port eUSB2 to USB2 Redriver.
+ This redriver performs translation between eUSB2 and USB2 signalling
+ schemes. It supports all three USB 2.0 data rates: Low Speed, Full
+ Speed and High Speed.
+
source "drivers/phy/allwinner/Kconfig"
source "drivers/phy/amlogic/Kconfig"
source "drivers/phy/broadcom/Kconfig"
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 5fcbce5f9ab1..b64247046575 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_PHY_XGENE) += phy-xgene.o
obj-$(CONFIG_PHY_PISTACHIO_USB) += phy-pistachio-usb.o
obj-$(CONFIG_USB_LGM_PHY) += phy-lgm-usb.o
obj-$(CONFIG_PHY_AIROHA_PCIE) += phy-airoha-pcie.o
+obj-$(CONFIG_PHY_NXP_PTN3222) += phy-nxp-ptn3222.o
obj-y += allwinner/ \
amlogic/ \
broadcom/ \
diff --git a/drivers/phy/phy-nxp-ptn3222.c b/drivers/phy/phy-nxp-ptn3222.c
new file mode 100644
index 000000000000..c6179d8701e6
--- /dev/null
+++ b/drivers/phy/phy-nxp-ptn3222.c
@@ -0,0 +1,123 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2024, Linaro Limited
+ */
+
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+#define NUM_SUPPLIES 2
+
+struct ptn3222 {
+ struct i2c_client *client;
+ struct phy *phy;
+ struct gpio_desc *reset_gpio;
+ struct regulator_bulk_data *supplies;
+};
+
+static int ptn3222_init(struct phy *phy)
+{
+ struct ptn3222 *ptn3222 = phy_get_drvdata(phy);
+ int ret;
+
+ ret = regulator_bulk_enable(NUM_SUPPLIES, ptn3222->supplies);
+ if (ret)
+ return ret;
+
+ gpiod_set_value_cansleep(ptn3222->reset_gpio, 0);
+
+ return 0;
+}
+
+static int ptn3222_exit(struct phy *phy)
+{
+ struct ptn3222 *ptn3222 = phy_get_drvdata(phy);
+
+ gpiod_set_value_cansleep(ptn3222->reset_gpio, 1);
+
+ return regulator_bulk_disable(NUM_SUPPLIES, ptn3222->supplies);
+}
+
+static const struct phy_ops ptn3222_ops = {
+ .init = ptn3222_init,
+ .exit = ptn3222_exit,
+ .owner = THIS_MODULE,
+};
+
+static const struct regulator_bulk_data ptn3222_supplies[NUM_SUPPLIES] = {
+ {
+ .supply = "vdd3v3",
+ .init_load_uA = 11000,
+ }, {
+ .supply = "vdd1v8",
+ .init_load_uA = 55000,
+ }
+};
+
+static int ptn3222_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct phy_provider *phy_provider;
+ struct ptn3222 *ptn3222;
+ int ret;
+
+ ptn3222 = devm_kzalloc(dev, sizeof(*ptn3222), GFP_KERNEL);
+ if (!ptn3222)
+ return -ENOMEM;
+
+ ptn3222->client = client;
+
+ ptn3222->reset_gpio = devm_gpiod_get_optional(dev, "reset",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(ptn3222->reset_gpio))
+ return dev_err_probe(dev, PTR_ERR(ptn3222->reset_gpio),
+ "unable to acquire reset gpio\n");
+
+ ret = devm_regulator_bulk_get_const(dev, NUM_SUPPLIES, ptn3222_supplies,
+ &ptn3222->supplies);
+ if (ret)
+ return ret;
+
+ ptn3222->phy = devm_phy_create(dev, dev->of_node, &ptn3222_ops);
+ if (IS_ERR(ptn3222->phy)) {
+ dev_err(dev, "failed to create PHY: %d\n", ret);
+ return PTR_ERR(ptn3222->phy);
+ }
+
+ phy_set_drvdata(ptn3222->phy, ptn3222);
+
+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+
+ return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static const struct i2c_device_id ptn3222_table[] = {
+ { "ptn3222" },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ptn3222_table);
+
+static const struct of_device_id ptn3222_of_table[] = {
+ { .compatible = "nxp,ptn3222" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ptn3222_of_table);
+
+static struct i2c_driver ptn3222_driver = {
+ .driver = {
+ .name = "ptn3222",
+ .of_match_table = ptn3222_of_table,
+ },
+ .probe = ptn3222_probe,
+ .id_table = ptn3222_table,
+};
+
+module_i2c_driver(ptn3222_driver)
+
+MODULE_DESCRIPTION("NXP PTN3222 eUSB2 Redriver driver");
+MODULE_LICENSE("GPL");
The I2C driver just realizes the function on reset and PWR. What about
other I2C driver function like I2C interface operations, auto-suspend,
remote wakeup, memory maps etc. Who will enable these? I think it is not
incomplete I2C driver, if on someday, ptn3222 is used as I2C device.
Regards,
Song Xue
