[PATCH] drivers: extcon: Add support for ptn5150

From: Vijai Kumar K
Date: Mon Jan 21 2019 - 04:10:50 EST

PTN5150A is a small thin low power CC Logic chip supporting
the USB Type-C connector application with Configurationn Channel(CC)
control logic detection and indication functions.

Add driver, Kconfig and Makefile entries.

Change-Id: I3b2da147a33b913b9ec60cd914b20acd955950c7
Signed-off-by: Vijai Kumar K <vijaikumar.kanagarajan@xxxxxxxxx>
---
.../devicetree/bindings/extcon/extcon-ptn5150.txt | 22 ++
drivers/extcon/Kconfig | 8 +
drivers/extcon/Makefile | 1 +
drivers/extcon/extcon-ptn5150.c | 327 +++++++++++++++++++++
drivers/extcon/extcon-ptn5150.h | 51 ++++
5 files changed, 409 insertions(+)
create mode 100644 Documentation/devicetree/bindings/extcon/extcon-ptn5150.txt
create mode 100644 drivers/extcon/extcon-ptn5150.c
create mode 100644 drivers/extcon/extcon-ptn5150.h

diff --git a/Documentation/devicetree/bindings/extcon/extcon-ptn5150.txt b/Documentation/devicetree/bindings/extcon/extcon-ptn5150.txt
new file mode 100644
index 0000000..8ea33bb
--- /dev/null
+++ b/Documentation/devicetree/bindings/extcon/extcon-ptn5150.txt
@@ -0,0 +1,22 @@
+
+* PTN5150 CC logic device
+PTN5150A is a small thin low power CC Logic chip supporting the USB Type-C
+connector application with Configuration Channel (CC) control logic detection and
+indication functions. It is Interfaced to the host controller using an I2C interface.
+
+Required properties:
+- compatible: Should be "nxp,ptn5150"
+- reg: Specifies the I2C slave address of the device
+- int-gpio: GPIO to which INTB is connected
+- vbus-gpio: GPIO which controls VBUS on/off
+
+Example:
+ ptn5150@1d {
+ compatible = "nxp,ptn5150";
+ reg = <0x1d>;
+ int-gpio = <&msmgpio 78 GPIO_ACTIVE_HIGH>;
+ vbus-gpio = <&msmgpio 148 GPIO_ACTIVE_HIGH>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&ptn5150_default>;
+ status = "okay";
+ };
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index a7bca42..6adc797 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -113,6 +113,14 @@ config EXTCON_PALMAS
Say Y here to enable support for USB peripheral and USB host
detection by palmas usb.

+config EXTCON_PTN5150
+ tristate "PTN5150 CC LOGIC USB EXTCON support"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ Say Y here to enable support for USB peripheral and USB host
+ detection by ptn5150 cc logic chip.
+
config EXTCON_QCOM_SPMI_MISC
tristate "Qualcomm USB extcon support"
depends on ARCH_QCOM || COMPILE_TEST
diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile
index 0888fde..261ce4c 100644
--- a/drivers/extcon/Makefile
+++ b/drivers/extcon/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_EXTCON_MAX77693) += extcon-max77693.o
obj-$(CONFIG_EXTCON_MAX77843) += extcon-max77843.o
obj-$(CONFIG_EXTCON_MAX8997) += extcon-max8997.o
obj-$(CONFIG_EXTCON_PALMAS) += extcon-palmas.o
+obj-$(CONFIG_EXTCON_PTN5150) += extcon-ptn5150.o
obj-$(CONFIG_EXTCON_QCOM_SPMI_MISC) += extcon-qcom-spmi-misc.o
obj-$(CONFIG_EXTCON_RT8973A) += extcon-rt8973a.o
obj-$(CONFIG_EXTCON_SM5502) += extcon-sm5502.o
diff --git a/drivers/extcon/extcon-ptn5150.c b/drivers/extcon/extcon-ptn5150.c
new file mode 100644
index 0000000..bc00874
--- /dev/null
+++ b/drivers/extcon/extcon-ptn5150.c
@@ -0,0 +1,327 @@
+/*
+ * extcon-ptn5150.c - PTN5150 CC logic extcon driver to support USB detection
+ *
+ * Copyright (c) 2018-2019 by Vijai Kumar K
+ * Author: Vijai Kumar K <vijaikumar.kanagarajan@xxxxxxxxx>
+ *
+ * Based on extcon-sm5502.c driver
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/extcon.h>
+#include <linux/gpio.h>
+
+#include "extcon-ptn5150.h"
+
+struct ptn5150_info {
+ struct device *dev;
+ struct extcon_dev *edev;
+ struct i2c_client *i2c;
+ struct regmap *regmap;
+ struct gpio_desc *int_gpiod;
+ struct gpio_desc *vbus_gpiod;
+ int irq;
+ struct work_struct irq_work;
+ struct mutex mutex;
+};
+
+/* List of detectable cables */
+static const unsigned int ptn5150_extcon_cable[] = {
+ EXTCON_USB,
+ EXTCON_USB_HOST,
+ EXTCON_NONE,
+};
+
+static const struct regmap_config ptn5150_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = PTN5150_REG_END,
+};
+
+static void ptn5150_irq_work(struct work_struct *work)
+{
+ struct ptn5150_info *info = container_of(work,
+ struct ptn5150_info, irq_work);
+ int ret = 0;
+ unsigned int reg_data;
+ unsigned int port_status;
+ unsigned int vbus;
+ unsigned int cable_attach;
+ unsigned int int_status;
+
+ if (!info->edev)
+ return;
+
+ mutex_lock(&info->mutex);
+
+ ret = regmap_read(info->regmap, PTN5150_REG_CC_STATUS, &reg_data);
+ if (ret) {
+ dev_err(info->dev,
+ "failed to read CC STATUS %d\n", ret);
+ mutex_unlock(&info->mutex);
+ return;
+ }
+ /* Clear interrupt. Read would clear the register */
+ ret = regmap_read(info->regmap, PTN5150_REG_INT_STATUS, &int_status);
+ if (ret) {
+ dev_err(info->dev,
+ "failed to read INT STATUS %d\n", ret);
+ mutex_unlock(&info->mutex);
+ return;
+ }
+
+ if (int_status) {
+ cable_attach = int_status & PTN5150_REG_INT_CABLE_ATTACH_MASK;
+ if (cable_attach) {
+ port_status = ((reg_data &
+ PTN5150_REG_CC_PORT_ATTACHMENT_MASK) >>
+ PTN5150_REG_CC_PORT_ATTACHMENT_SHIFT);
+
+ switch (port_status) {
+ case PTN5150_DFP_ATTACHED:
+ extcon_set_state_sync(info->edev,
+ EXTCON_USB_HOST, false);
+ gpiod_set_value(info->vbus_gpiod, 0);
+ extcon_set_state_sync(info->edev, EXTCON_USB,
+ true);
+ break;
+ case PTN5150_UFP_ATTACHED:
+ extcon_set_state_sync(info->edev, EXTCON_USB,
+ false);
+ vbus = ((reg_data &
+ PTN5150_REG_CC_VBUS_DETECTION_MASK) >>
+ PTN5150_REG_CC_VBUS_DETECTION_SHIFT);
+ if (vbus)
+ gpiod_set_value(info->vbus_gpiod, 0);
+ else
+ gpiod_set_value(info->vbus_gpiod, 1);
+
+ extcon_set_state_sync(info->edev,
+ EXTCON_USB_HOST, true);
+ break;
+ default:
+ dev_err(info->dev,
+ "Unknown Port status : %x\n",
+ port_status);
+ break;
+ }
+ } else {
+ extcon_set_state_sync(info->edev,
+ EXTCON_USB_HOST, false);
+ extcon_set_state_sync(info->edev,
+ EXTCON_USB, false);
+ gpiod_set_value(info->vbus_gpiod, 0);
+ }
+ }
+
+ /* Clear interrupt. Read would clear the register */
+ ret = regmap_read(info->regmap, PTN5150_REG_INT_REG_STATUS,
+ &int_status);
+ if (ret) {
+ dev_err(info->dev,
+ "failed to read INT REG STATUS %d\n", ret);
+ mutex_unlock(&info->mutex);
+ return;
+ }
+
+
+ mutex_unlock(&info->mutex);
+}
+
+
+static irqreturn_t ptn5150_irq_handler(int irq, void *data)
+{
+ struct ptn5150_info *info = data;
+
+ schedule_work(&info->irq_work);
+
+ return IRQ_HANDLED;
+}
+
+static int ptn5150_init_dev_type(struct ptn5150_info *info)
+{
+ unsigned int reg_data, vendor_id, version_id;
+ int ret;
+
+ ret = regmap_read(info->regmap, PTN5150_REG_DEVICE_ID, &reg_data);
+ if (ret) {
+ dev_err(info->dev, "failed to read DEVICE_ID %d\n", ret);
+ return -EINVAL;
+ }
+
+ vendor_id = ((reg_data & PTN5150_REG_DEVICE_ID_VENDOR_MASK) >>
+ PTN5150_REG_DEVICE_ID_VENDOR_SHIFT);
+ version_id = ((reg_data & PTN5150_REG_DEVICE_ID_VERSION_MASK) >>
+ PTN5150_REG_DEVICE_ID_VERSION_SHIFT);
+
+ dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
+ version_id, vendor_id);
+
+ /* Clear any existing interrupts */
+ ret = regmap_read(info->regmap, PTN5150_REG_INT_STATUS, &reg_data);
+ if (ret) {
+ dev_err(info->dev,
+ "failed to read PTN5150_REG_INT_STATUS %d\n",
+ ret);
+ return -EINVAL;
+ }
+
+ ret = regmap_read(info->regmap, PTN5150_REG_INT_REG_STATUS, &reg_data);
+ if (ret) {
+ dev_err(info->dev,
+ "failed to read PTN5150_REG_INT_REG_STATUS %d\n", ret);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int ptn5150_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &i2c->dev;
+ struct device_node *np = i2c->dev.of_node;
+ struct ptn5150_info *info;
+ int ret;
+
+ if (!np)
+ return -EINVAL;
+
+ info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+ i2c_set_clientdata(i2c, info);
+
+ info->dev = &i2c->dev;
+ info->i2c = i2c;
+ info->int_gpiod = devm_gpiod_get(&i2c->dev, "int", GPIOD_IN);
+ if (!info->int_gpiod) {
+ dev_err(dev, "failed to get INT GPIO\n");
+ return -EINVAL;
+ }
+ info->vbus_gpiod = devm_gpiod_get(&i2c->dev, "vbus", GPIOD_IN);
+ if (!info->vbus_gpiod) {
+ dev_err(dev, "failed to get VBUS GPIO\n");
+ return -EINVAL;
+ }
+ ret = gpiod_direction_output(info->vbus_gpiod, 0);
+ if (ret) {
+ dev_err(dev, "failed to set VBUS GPIO direction\n");
+ return -EINVAL;
+ }
+
+ mutex_init(&info->mutex);
+
+ INIT_WORK(&info->irq_work, ptn5150_irq_work);
+
+ info->regmap = devm_regmap_init_i2c(i2c, &ptn5150_regmap_config);
+ if (IS_ERR(info->regmap)) {
+ ret = PTR_ERR(info->regmap);
+ dev_err(info->dev, "failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ if (info->int_gpiod) {
+ info->irq = gpiod_to_irq(info->int_gpiod);
+ if (info->irq < 0) {
+ dev_err(dev, "failed to get INTB IRQ\n");
+ return info->irq;
+ }
+
+ ret = devm_request_threaded_irq(dev, info->irq, NULL,
+ ptn5150_irq_handler,
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ i2c->name, info);
+ if (ret < 0) {
+ dev_err(dev, "failed to request handler for INTB IRQ\n");
+ return ret;
+ }
+ }
+
+ /* Allocate extcon device */
+ info->edev = devm_extcon_dev_allocate(info->dev, ptn5150_extcon_cable);
+ if (IS_ERR(info->edev)) {
+ dev_err(info->dev, "failed to allocate memory for extcon\n");
+ return -ENOMEM;
+ }
+
+ /* Register extcon device */
+ ret = devm_extcon_dev_register(info->dev, info->edev);
+ if (ret) {
+ dev_err(info->dev, "failed to register extcon device\n");
+ return ret;
+ }
+
+ /* Initialize PTN5150 device and print vendor id and version id */
+ ret = ptn5150_init_dev_type(info);
+ if (ret)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int ptn5150_i2c_remove(struct i2c_client *i2c)
+{
+ return 0;
+}
+
+static const struct of_device_id ptn5150_dt_match[] = {
+ { .compatible = "nxp,ptn5150" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, ptn5150_dt_match);
+
+#ifdef CONFIG_PM_SLEEP
+static int ptn5150_suspend(struct device *dev)
+{
+ return 0;
+}
+
+static int ptn5150_resume(struct device *dev)
+{
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(ptn5150_pm_ops,
+ ptn5150_suspend, ptn5150_resume);
+
+static const struct i2c_device_id ptn5150_i2c_id[] = {
+ { "ptn5150", TYPE_PTN5150A },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ptn5150_i2c_id);
+
+static struct i2c_driver ptn5150_i2c_driver = {
+ .driver = {
+ .name = "ptn5150",
+ .pm = &ptn5150_pm_ops,
+ .of_match_table = ptn5150_dt_match,
+ },
+ .probe = ptn5150_i2c_probe,
+ .remove = ptn5150_i2c_remove,
+ .id_table = ptn5150_i2c_id,
+};
+
+static int __init ptn5150_i2c_init(void)
+{
+ return i2c_add_driver(&ptn5150_i2c_driver);
+}
+subsys_initcall(ptn5150_i2c_init);
+
+MODULE_DESCRIPTION("NXP PTN5150 CC logic Extcon driver");
+MODULE_AUTHOR("Vijai Kumar K <vijaikumar.kanagarajan@xxxxxxxxx>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/extcon/extcon-ptn5150.h b/drivers/extcon/extcon-ptn5150.h
new file mode 100644
index 0000000..217dab0
--- /dev/null
+++ b/drivers/extcon/extcon-ptn5150.h
@@ -0,0 +1,51 @@
+/*
+ * extcon-ptn5150.h
+ *
+ * Copyright (c) 2018-2019 by Vijai Kumar K
+ * Author: Vijai Kumar K <vijaikumar.kanagarajan@xxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __LINUX_EXTCON_PTN5150_H
+#define __LINUX_EXTCON_PTN5150_H
+
+enum ptn5150_types {
+ TYPE_PTN5150A,
+};
+
+/* PTN5150 registers */
+enum ptn5150_reg {
+ PTN5150_REG_DEVICE_ID = 0x01,
+ PTN5150_REG_CONTROL,
+ PTN5150_REG_INT_STATUS,
+ PTN5150_REG_CC_STATUS,
+ PTN5150_REG_CON_DET = 0x09,
+ PTN5150_REG_VCONN_STATUS,
+ PTN5150_REG_RESET,
+ PTN5150_REG_INT_MASK = 0x18,
+ PTN5150_REG_INT_REG_STATUS,
+ PTN5150_REG_END,
+};
+
+#define PTN5150_DFP_ATTACHED 0x1
+#define PTN5150_UFP_ATTACHED 0x2
+
+/* Define PTN5150 MASK/SHIFT constant */
+#define PTN5150_REG_DEVICE_ID_VENDOR_SHIFT 0
+#define PTN5150_REG_DEVICE_ID_VERSION_SHIFT 3
+#define PTN5150_REG_DEVICE_ID_VENDOR_MASK (0x3 << PTN5150_REG_DEVICE_ID_VENDOR_SHIFT)
+#define PTN5150_REG_DEVICE_ID_VERSION_MASK (0x1f << PTN5150_REG_DEVICE_ID_VERSION_SHIFT)
+
+#define PTN5150_REG_CC_PORT_ATTACHMENT_SHIFT 2
+#define PTN5150_REG_CC_PORT_ATTACHMENT_MASK (0x7 << PTN5150_REG_CC_PORT_ATTACHMENT_SHIFT)
+#define PTN5150_REG_CC_VBUS_DETECTION_SHIFT 7
+#define PTN5150_REG_CC_VBUS_DETECTION_MASK (0x1 << PTN5150_REG_CC_VBUS_DETECTION_SHIFT)
+#define PTN5150_REG_INT_CABLE_ATTACH_SHIFT 0
+#define PTN5150_REG_INT_CABLE_ATTACH_MASK (0x1 << PTN5150_REG_INT_CABLE_ATTACH_SHIFT)
+#define PTN5150_REG_INT_CABLE_DETACH_SHIFT 1
+#define PTN5150_REG_INT_CABLE_DETACH_MASK (0x1 << PTN5150_REG_CC_CABLE_DETACH_SHIFT)
+#endif /* __LINUX_EXTCON_PTN5150_H */
--
2.7.4