MLK-16065-5 extcon: ptn5150: add PTN5150 Type-C CC logic chip
Add NXP PTN5150 Type-C CC logic chip, this chip supplies CC flip function automatically, and the driver will notify extcon consumer (USB controller driver) attach and detach events. Signed-off-by: Peter Chen <peter.chen@nxp.com>pull/10/head
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33dca19f2a
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d43f529edd
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@ -0,0 +1,28 @@
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PTN5150 Extcon device
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NXP PTN5150 is an i2c interface Type-C application chip, it can detect
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CC flip, attach and detech, the user can get these events through
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i2c registers by GPIO interrupt.
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Required properties:
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- compatible: Should be "nxp,ptn5150"
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- connect-gpios: gpio interrupt for attach and detach events.
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- reg: i2c slave address
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Example:
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&i2c1 {
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#address-cells = <1>;
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#size-cells = <0>;
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clock-frequency = <100000>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_lpi2c1>;
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status = "okay";
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typec_ptn5150: typec@3d {
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compatible = "nxp,ptn5150";
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_ptn5150>;
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reg = <0x3d>;
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connect-gpios = <&gpio1 7 GPIO_ACTIVE_HIGH>;
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};
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};
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@ -157,4 +157,12 @@ config EXTCON_USBC_CROS_EC
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Say Y here to enable USB Type C cable detection extcon support when
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using Chrome OS EC based USB Type-C ports.
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config EXTCON_PTN5150
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tristate "NXP PTN5150 CC Logic For Type-C Applications"
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depends on I2C && GPIOLIB
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select REGMAP_I2C
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help
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Say Y here to enable NXP PTN5150 CC logic for Type-C applications,
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this chip can supply the CC flip, attach and detach detection.
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endif
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@ -22,3 +22,4 @@ obj-$(CONFIG_EXTCON_RT8973A) += extcon-rt8973a.o
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obj-$(CONFIG_EXTCON_SM5502) += extcon-sm5502.o
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obj-$(CONFIG_EXTCON_USB_GPIO) += extcon-usb-gpio.o
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obj-$(CONFIG_EXTCON_USBC_CROS_EC) += extcon-usbc-cros-ec.o
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obj-$(CONFIG_EXTCON_PTN5150) += extcon-ptn5150.o
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/*
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* extcon-ptn5150.c - NXP CC logic for USB Type-C applications
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*
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* Copyright 2017 NXP
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* Author: Peter Chen <peter.chen@nxp.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 of
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* the License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include <linux/extcon.h>
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#include <linux/gpio/consumer.h>
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/* PTN5150_REG_INT_STATUS */
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#define CABLE_ATTACHED (1 << 0)
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#define CABLE_DETACHED (1 << 1)
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/* PTN5150_REG_CC_STATUS */
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#define IS_DFP_ATTATCHED(val) (((val) & 0x1c) == 0x4)
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#define IS_UFP_ATTATCHED(val) (((val) & 0x1c) == 0x8)
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#define IS_NOT_CONNECTED(val) (((val) & 0x1c) == 0x0)
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/* PTN5150_REG_CON_DET */
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#define DISABLE_CON_DET (1 << 0)
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struct ptn5150_info {
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struct device *dev;
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struct extcon_dev *edev;
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struct work_struct wq_detect_cable;
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struct regmap *regmap;
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};
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/* List of detectable cables */
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static const unsigned int ptn5150_extcon_cable[] = {
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EXTCON_USB,
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EXTCON_USB_HOST,
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EXTCON_NONE,
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};
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enum ptn5150_reg {
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PTN5150_REG_DEVICE_ID = 0x1,
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PTN5150_REG_CONTROL,
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PTN5150_REG_INT_STATUS,
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PTN5150_REG_CC_STATUS,
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PTN5150_REG_RSVD_5,
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PTN5150_REG_RSVD_6,
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PTN5150_REG_RSVD_7,
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PTN5150_REG_RSVD_8,
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PTN5150_REG_CON_DET,
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PTN5150_REG_VCONN_STATUS,
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PTN5150_REG_RESET = 0x10,
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PTN5150_REG_RSVD_11,
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PTN5150_REG_RSVD_12,
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PTN5150_REG_RSVD_13,
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PTN5150_REG_RSVD_14,
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PTN5150_REG_RSVD_15,
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PTN5150_REG_RSVD_16,
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PTN5150_REG_RSVD_17,
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PTN5150_REG_INT_MASK,
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PTN5150_REG_INT_REG_STATUS,
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PTN5150_REG_END,
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};
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static const struct regmap_config ptn5150_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = PTN5150_REG_END,
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};
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static void ptn5150_detect_cable(struct work_struct *work)
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{
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struct ptn5150_info *info = container_of(work, struct ptn5150_info,
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wq_detect_cable);
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int ret;
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unsigned int val;
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ret = regmap_read(info->regmap, PTN5150_REG_CC_STATUS, &val);
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if (ret)
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dev_err(info->dev, "failed to get CC status:%d\n", ret);
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if (IS_UFP_ATTATCHED(val)) {
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extcon_set_state_sync(info->edev, EXTCON_USB, false);
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extcon_set_state_sync(info->edev, EXTCON_USB_HOST,
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true);
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} else if (IS_DFP_ATTATCHED(val)) {
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extcon_set_state_sync(info->edev, EXTCON_USB_HOST,
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false);
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extcon_set_state_sync(info->edev, EXTCON_USB, true);
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} else if (IS_NOT_CONNECTED(val)) {
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extcon_set_state_sync(info->edev, EXTCON_USB, false);
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extcon_set_state_sync(info->edev, EXTCON_USB_HOST, false);
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} else {
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dev_dbg(info->dev, "other CC status is :0x%x", val);
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}
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}
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static int ptn5150_clear_interrupt(struct ptn5150_info *info)
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{
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unsigned int val;
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int ret;
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ret = regmap_read(info->regmap, PTN5150_REG_INT_STATUS, &val);
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if (ret)
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dev_err(info->dev,
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"failed to clear interrupt status:%d\n",
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ret);
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return (ret < 0) ? ret : (int)val;
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}
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static irqreturn_t ptn5150_connect_irq_handler(int irq, void *dev_id)
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{
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struct ptn5150_info *info = dev_id;
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if (ptn5150_clear_interrupt(info) > 0)
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queue_work(system_power_efficient_wq, &info->wq_detect_cable);
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return IRQ_HANDLED;
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}
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static int ptn5150_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct device_node *np = i2c->dev.of_node;
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struct ptn5150_info *info;
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int ret, connect_irq, gpio_val, count = 1000;
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unsigned int dev_id;
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struct gpio_desc *connect_gpiod;
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if (!np)
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return -EINVAL;
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info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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i2c_set_clientdata(i2c, info);
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info->dev = &i2c->dev;
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info->regmap = devm_regmap_init_i2c(i2c, &ptn5150_regmap_config);
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if (IS_ERR(info->regmap)) {
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ret = PTR_ERR(info->regmap);
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dev_err(info->dev, "failed to allocate register map: %d\n",
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ret);
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return ret;
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}
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/* Allocate extcon device */
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info->edev = devm_extcon_dev_allocate(info->dev, ptn5150_extcon_cable);
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if (IS_ERR(info->edev)) {
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dev_err(info->dev, "failed to allocate memory for extcon\n");
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return -ENOMEM;
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}
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/* Register extcon device */
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ret = devm_extcon_dev_register(info->dev, info->edev);
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if (ret) {
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dev_err(info->dev, "failed to register extcon device\n");
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return ret;
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}
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connect_gpiod = devm_gpiod_get(info->dev, "connect", GPIOD_IN);
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if (IS_ERR(connect_gpiod)) {
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dev_err(info->dev, "failed to get connect GPIO\n");
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return PTR_ERR(connect_gpiod);
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}
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connect_irq = gpiod_to_irq(connect_gpiod);
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if (connect_irq < 0) {
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dev_err(info->dev, "failed to get connect IRQ\n");
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return connect_irq;
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}
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/* Clear the pending interrupts */
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ret = ptn5150_clear_interrupt(info);
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if (ret < 0)
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return ret;
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gpio_val = gpiod_get_value(connect_gpiod);
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/* Delay until the GPIO goes to high if it is low before */
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while (gpio_val == 0 && count >= 0) {
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gpio_val = gpiod_get_value(connect_gpiod);
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usleep_range(10, 20);
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count--;
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}
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if (count < 0)
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dev_err(info->dev, "timeout for waiting gpio becoming high\n");
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ret = regmap_read(info->regmap, PTN5150_REG_DEVICE_ID, &dev_id);
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if (ret) {
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dev_err(info->dev, "failed to read device id:%d\n", ret);
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return ret;
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}
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dev_dbg(info->dev, "NXP PTN5150: Version ID:0x%x, Vendor ID:0x%x\n",
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(dev_id >> 3), (dev_id & 0x3));
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ret = regmap_update_bits(info->regmap, PTN5150_REG_CON_DET,
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DISABLE_CON_DET, ~DISABLE_CON_DET);
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if (ret) {
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dev_err(info->dev,
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"failed to enable CON_DET output on pin 5:%d\n",
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ret);
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return ret;
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}
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INIT_WORK(&info->wq_detect_cable, ptn5150_detect_cable);
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ret = devm_request_threaded_irq(info->dev, connect_irq, NULL,
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ptn5150_connect_irq_handler,
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IRQF_TRIGGER_LOW | IRQF_ONESHOT,
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dev_name(info->dev), info);
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if (ret < 0) {
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dev_err(info->dev, "failed to request connect IRQ\n");
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return ret;
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}
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/* Do cable detect now */
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ptn5150_detect_cable(&info->wq_detect_cable);
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return ret;
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}
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static int ptn5150_i2c_remove(struct i2c_client *i2c)
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{
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return 0;
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}
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static const struct i2c_device_id ptn5150_id[] = {
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{ "ptn5150", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(i2c, ptn5150_id);
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#ifdef CONFIG_OF
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static const struct of_device_id ptn5150_of_match[] = {
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{ .compatible = "nxp,ptn5150", },
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{ .compatible = "nxp,ptn5150a", },
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{},
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};
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MODULE_DEVICE_TABLE(of, ptn5150_of_match);
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#endif
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static struct i2c_driver ptn5150_i2c_driver = {
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.driver = {
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.name = "ptn5150",
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.of_match_table = of_match_ptr(ptn5150_of_match),
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},
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.probe = ptn5150_i2c_probe,
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.remove = ptn5150_i2c_remove,
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.id_table = ptn5150_id,
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};
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module_i2c_driver(ptn5150_i2c_driver);
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MODULE_DESCRIPTION("NXP PTN5150 CC logic driver for USB Type-C");
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MODULE_AUTHOR("Peter Chen <peter.chen@nxp.com>");
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MODULE_LICENSE("GPL v2");
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