[mirror_ubuntu-artful-kernel.git] / drivers / extcon / extcon-axp288.c

/*
 * extcon-axp288.c - X-Power AXP288 PMIC extcon cable detection driver
 *
 * Copyright (C) 2015 Intel Corporation
 * Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/notifier.h>
#include <linux/extcon.h>
#include <linux/regmap.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/mfd/axp20x.h>

/* Power source status register */
#define PS_STAT_VBUS_TRIGGER		BIT(0)
#define PS_STAT_BAT_CHRG_DIR		BIT(2)
#define PS_STAT_VBUS_ABOVE_VHOLD	BIT(3)
#define PS_STAT_VBUS_VALID		BIT(4)
#define PS_STAT_VBUS_PRESENT		BIT(5)

/* BC module global register */
#define BC_GLOBAL_RUN			BIT(0)
#define BC_GLOBAL_DET_STAT		BIT(2)
#define BC_GLOBAL_DBP_TOUT		BIT(3)
#define BC_GLOBAL_VLGC_COM_SEL		BIT(4)
#define BC_GLOBAL_DCD_TOUT_MASK		(BIT(6)|BIT(5))
#define BC_GLOBAL_DCD_TOUT_300MS	0
#define BC_GLOBAL_DCD_TOUT_100MS	1
#define BC_GLOBAL_DCD_TOUT_500MS	2
#define BC_GLOBAL_DCD_TOUT_900MS	3
#define BC_GLOBAL_DCD_DET_SEL		BIT(7)

/* BC module vbus control and status register */
#define VBUS_CNTL_DPDM_PD_EN		BIT(4)
#define VBUS_CNTL_DPDM_FD_EN		BIT(5)
#define VBUS_CNTL_FIRST_PO_STAT		BIT(6)

/* BC USB status register */
#define USB_STAT_BUS_STAT_MASK		(BIT(3)|BIT(2)|BIT(1)|BIT(0))
#define USB_STAT_BUS_STAT_SHIFT		0
#define USB_STAT_BUS_STAT_ATHD		0
#define USB_STAT_BUS_STAT_CONN		1
#define USB_STAT_BUS_STAT_SUSP		2
#define USB_STAT_BUS_STAT_CONF		3
#define USB_STAT_USB_SS_MODE		BIT(4)
#define USB_STAT_DEAD_BAT_DET		BIT(6)
#define USB_STAT_DBP_UNCFG		BIT(7)

/* BC detect status register */
#define DET_STAT_MASK			(BIT(7)|BIT(6)|BIT(5))
#define DET_STAT_SHIFT			5
#define DET_STAT_SDP			1
#define DET_STAT_CDP			2
#define DET_STAT_DCP			3

enum axp288_extcon_reg {
	AXP288_PS_STAT_REG		= 0x00,
	AXP288_PS_BOOT_REASON_REG	= 0x02,
	AXP288_BC_GLOBAL_REG		= 0x2c,
	AXP288_BC_VBUS_CNTL_REG		= 0x2d,
	AXP288_BC_USB_STAT_REG		= 0x2e,
	AXP288_BC_DET_STAT_REG		= 0x2f,
};

enum axp288_mux_select {
	EXTCON_GPIO_MUX_SEL_PMIC = 0,
	EXTCON_GPIO_MUX_SEL_SOC,
};

enum axp288_extcon_irq {
	VBUS_FALLING_IRQ = 0,
	VBUS_RISING_IRQ,
	MV_CHNG_IRQ,
	BC_USB_CHNG_IRQ,
	EXTCON_IRQ_END,
};

static const unsigned int axp288_extcon_cables[] = {
	EXTCON_CHG_USB_SDP,
	EXTCON_CHG_USB_CDP,
	EXTCON_CHG_USB_DCP,
	EXTCON_USB,
	EXTCON_NONE,
};

struct axp288_extcon_info {
	struct device *dev;
	struct regmap *regmap;
	struct regmap_irq_chip_data *regmap_irqc;
	struct gpio_desc *gpio_mux_cntl;
	int irq[EXTCON_IRQ_END];
	struct extcon_dev *edev;
	struct notifier_block extcon_nb;
	unsigned int previous_cable;
};

/* Power up/down reason string array */
static char *axp288_pwr_up_down_info[] = {
	"Last wake caused by user pressing the power button",
	"Last wake caused by a charger insertion",
	"Last wake caused by a battery insertion",
	"Last wake caused by SOC initiated global reset",
	"Last wake caused by cold reset",
	"Last shutdown caused by PMIC UVLO threshold",
	"Last shutdown caused by SOC initiated cold off",
	"Last shutdown caused by user pressing the power button",
	NULL,
};

/*
 * Decode and log the given "reset source indicator" (rsi)
 * register and then clear it.
 */
static void axp288_extcon_log_rsi(struct axp288_extcon_info *info)
{
	char **rsi;
	unsigned int val, i, clear_mask = 0;
	int ret;

	ret = regmap_read(info->regmap, AXP288_PS_BOOT_REASON_REG, &val);
	for (i = 0, rsi = axp288_pwr_up_down_info; *rsi; rsi++, i++) {
		if (val & BIT(i)) {
			dev_dbg(info->dev, "%s\n", *rsi);
			clear_mask |= BIT(i);
		}
	}

	/* Clear the register value for next reboot (write 1 to clear bit) */
	regmap_write(info->regmap, AXP288_PS_BOOT_REASON_REG, clear_mask);
}

static int axp288_handle_chrg_det_event(struct axp288_extcon_info *info)
{
	int ret, stat, cfg, pwr_stat;
	u8 chrg_type;
	unsigned int cable = info->previous_cable;
	bool vbus_attach = false;

	ret = regmap_read(info->regmap, AXP288_PS_STAT_REG, &pwr_stat);
	if (ret < 0) {
		dev_err(info->dev, "failed to read vbus status\n");
		return ret;
	}

	vbus_attach = (pwr_stat & PS_STAT_VBUS_VALID);
	if (!vbus_attach)
		goto no_vbus;

	/* Check charger detection completion status */
	ret = regmap_read(info->regmap, AXP288_BC_GLOBAL_REG, &cfg);
	if (ret < 0)
		goto dev_det_ret;
	if (cfg & BC_GLOBAL_DET_STAT) {
		dev_dbg(info->dev, "can't complete the charger detection\n");
		goto dev_det_ret;
	}

	ret = regmap_read(info->regmap, AXP288_BC_DET_STAT_REG, &stat);
	if (ret < 0)
		goto dev_det_ret;

	chrg_type = (stat & DET_STAT_MASK) >> DET_STAT_SHIFT;

	switch (chrg_type) {
	case DET_STAT_SDP:
		dev_dbg(info->dev, "sdp cable is connected\n");
		cable = EXTCON_CHG_USB_SDP;
		break;
	case DET_STAT_CDP:
		dev_dbg(info->dev, "cdp cable is connected\n");
		cable = EXTCON_CHG_USB_CDP;
		break;
	case DET_STAT_DCP:
		dev_dbg(info->dev, "dcp cable is connected\n");
		cable = EXTCON_CHG_USB_DCP;
		break;
	default:
		dev_warn(info->dev,
			"disconnect or unknown or ID event\n");
	}

no_vbus:
	/*
	 * If VBUS is absent Connect D+/D- lines to PMIC for BC
	 * detection. Else connect them to SOC for USB communication.
	 */
	if (info->gpio_mux_cntl)
		gpiod_set_value(info->gpio_mux_cntl,
			vbus_attach ? EXTCON_GPIO_MUX_SEL_SOC
					: EXTCON_GPIO_MUX_SEL_PMIC);

	extcon_set_state_sync(info->edev, info->previous_cable, false);
	if (info->previous_cable == EXTCON_CHG_USB_SDP)
		extcon_set_state_sync(info->edev, EXTCON_USB, false);

	if (vbus_attach) {
		extcon_set_state_sync(info->edev, cable, vbus_attach);
		if (cable == EXTCON_CHG_USB_SDP)
			extcon_set_state_sync(info->edev, EXTCON_USB,
						vbus_attach);

		info->previous_cable = cable;
	}

	return 0;

dev_det_ret:
	if (ret < 0)
		dev_err(info->dev, "failed to detect BC Mod\n");

	return ret;
}

static irqreturn_t axp288_extcon_isr(int irq, void *data)
{
	struct axp288_extcon_info *info = data;
	int ret;

	ret = axp288_handle_chrg_det_event(info);
	if (ret < 0)
		dev_err(info->dev, "failed to handle the interrupt\n");

	return IRQ_HANDLED;
}

static void axp288_extcon_enable(struct axp288_extcon_info *info)
{
	regmap_update_bits(info->regmap, AXP288_BC_GLOBAL_REG,
						BC_GLOBAL_RUN, 0);
	/* Enable the charger detection logic */
	regmap_update_bits(info->regmap, AXP288_BC_GLOBAL_REG,
					BC_GLOBAL_RUN, BC_GLOBAL_RUN);
}

static int axp288_extcon_probe(struct platform_device *pdev)
{
	struct axp288_extcon_info *info;
	struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
	struct axp288_extcon_pdata *pdata = pdev->dev.platform_data;
	int ret, i, pirq, gpio;

	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
	if (!info)
		return -ENOMEM;

	info->dev = &pdev->dev;
	info->regmap = axp20x->regmap;
	info->regmap_irqc = axp20x->regmap_irqc;
	info->previous_cable = EXTCON_NONE;
	if (pdata)
		info->gpio_mux_cntl = pdata->gpio_mux_cntl;

	platform_set_drvdata(pdev, info);

	axp288_extcon_log_rsi(info);

	/* Initialize extcon device */
	info->edev = devm_extcon_dev_allocate(&pdev->dev,
					      axp288_extcon_cables);
	if (IS_ERR(info->edev)) {
		dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
		return PTR_ERR(info->edev);
	}

	/* Register extcon device */
	ret = devm_extcon_dev_register(&pdev->dev, info->edev);
	if (ret) {
		dev_err(&pdev->dev, "failed to register extcon device\n");
		return ret;
	}

	/* Set up gpio control for USB Mux */
	if (info->gpio_mux_cntl) {
		gpio = desc_to_gpio(info->gpio_mux_cntl);
		ret = devm_gpio_request(&pdev->dev, gpio, "USB_MUX");
		if (ret < 0) {
			dev_err(&pdev->dev,
				"failed to request the gpio=%d\n", gpio);
			return ret;
		}
		gpiod_direction_output(info->gpio_mux_cntl,
						EXTCON_GPIO_MUX_SEL_PMIC);
	}

	for (i = 0; i < EXTCON_IRQ_END; i++) {
		pirq = platform_get_irq(pdev, i);
		info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
		if (info->irq[i] < 0) {
			dev_err(&pdev->dev,
				"failed to get virtual interrupt=%d\n", pirq);
			ret = info->irq[i];
			return ret;
		}

		ret = devm_request_threaded_irq(&pdev->dev, info->irq[i],
				NULL, axp288_extcon_isr,
				IRQF_ONESHOT | IRQF_NO_SUSPEND,
				pdev->name, info);
		if (ret) {
			dev_err(&pdev->dev, "failed to request interrupt=%d\n",
							info->irq[i]);
			return ret;
		}
	}

	/* Start charger cable type detection */
	axp288_extcon_enable(info);

	return 0;
}

static const struct platform_device_id axp288_extcon_table[] = {
	{ .name = "axp288_extcon" },
	{},
};
MODULE_DEVICE_TABLE(platform, axp288_extcon_table);

static struct platform_driver axp288_extcon_driver = {
	.probe = axp288_extcon_probe,
	.id_table = axp288_extcon_table,
	.driver = {
		.name = "axp288_extcon",
	},
};
module_platform_driver(axp288_extcon_driver);

MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>");
MODULE_DESCRIPTION("X-Powers AXP288 extcon driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
f0312378 RP	1	/*
	2	* extcon-axp288.c - X-Power AXP288 PMIC extcon cable detection driver
	3	*
	4	* Copyright (C) 2015 Intel Corporation
	5	* Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*/
	16
	17	#include <linux/module.h>
	18	#include <linux/kernel.h>
	19	#include <linux/io.h>
	20	#include <linux/slab.h>
	21	#include <linux/interrupt.h>
	22	#include <linux/platform_device.h>
	23	#include <linux/property.h>
f0312378 RP	24	#include <linux/notifier.h>
	25	#include <linux/extcon.h>
	26	#include <linux/regmap.h>
	27	#include <linux/gpio.h>
	28	#include <linux/gpio/consumer.h>
	29	#include <linux/mfd/axp20x.h>
	30
	31	/* Power source status register */
	32	#define PS_STAT_VBUS_TRIGGER BIT(0)
	33	#define PS_STAT_BAT_CHRG_DIR BIT(2)
	34	#define PS_STAT_VBUS_ABOVE_VHOLD BIT(3)
	35	#define PS_STAT_VBUS_VALID BIT(4)
	36	#define PS_STAT_VBUS_PRESENT BIT(5)
	37
	38	/* BC module global register */
	39	#define BC_GLOBAL_RUN BIT(0)
	40	#define BC_GLOBAL_DET_STAT BIT(2)
	41	#define BC_GLOBAL_DBP_TOUT BIT(3)
	42	#define BC_GLOBAL_VLGC_COM_SEL BIT(4)
	43	#define BC_GLOBAL_DCD_TOUT_MASK (BIT(6)\|BIT(5))
	44	#define BC_GLOBAL_DCD_TOUT_300MS 0
	45	#define BC_GLOBAL_DCD_TOUT_100MS 1
	46	#define BC_GLOBAL_DCD_TOUT_500MS 2
	47	#define BC_GLOBAL_DCD_TOUT_900MS 3
	48	#define BC_GLOBAL_DCD_DET_SEL BIT(7)
	49
	50	/* BC module vbus control and status register */
	51	#define VBUS_CNTL_DPDM_PD_EN BIT(4)
	52	#define VBUS_CNTL_DPDM_FD_EN BIT(5)
	53	#define VBUS_CNTL_FIRST_PO_STAT BIT(6)
	54
	55	/* BC USB status register */
	56	#define USB_STAT_BUS_STAT_MASK (BIT(3)\|BIT(2)\|BIT(1)\|BIT(0))
	57	#define USB_STAT_BUS_STAT_SHIFT 0
	58	#define USB_STAT_BUS_STAT_ATHD 0
	59	#define USB_STAT_BUS_STAT_CONN 1
	60	#define USB_STAT_BUS_STAT_SUSP 2
	61	#define USB_STAT_BUS_STAT_CONF 3
	62	#define USB_STAT_USB_SS_MODE BIT(4)
	63	#define USB_STAT_DEAD_BAT_DET BIT(6)
	64	#define USB_STAT_DBP_UNCFG BIT(7)
	65
	66	/* BC detect status register */
	67	#define DET_STAT_MASK (BIT(7)\|BIT(6)\|BIT(5))
	68	#define DET_STAT_SHIFT 5
	69	#define DET_STAT_SDP 1
	70	#define DET_STAT_CDP 2
	71	#define DET_STAT_DCP 3
	72
f0312378 RP	73	enum axp288_extcon_reg {
	74	AXP288_PS_STAT_REG = 0x00,
	75	AXP288_PS_BOOT_REASON_REG = 0x02,
	76	AXP288_BC_GLOBAL_REG = 0x2c,
	77	AXP288_BC_VBUS_CNTL_REG = 0x2d,
	78	AXP288_BC_USB_STAT_REG = 0x2e,
	79	AXP288_BC_DET_STAT_REG = 0x2f,
f0312378 RP	80	};
	81
	82	enum axp288_mux_select {
	83	EXTCON_GPIO_MUX_SEL_PMIC = 0,
	84	EXTCON_GPIO_MUX_SEL_SOC,
	85	};
	86
	87	enum axp288_extcon_irq {
	88	VBUS_FALLING_IRQ = 0,
	89	VBUS_RISING_IRQ,
	90	MV_CHNG_IRQ,
	91	BC_USB_CHNG_IRQ,
	92	EXTCON_IRQ_END,
	93	};
	94
73b6ecdb	95	static const unsigned int axp288_extcon_cables[] = {
11eecf91 CC	96	EXTCON_CHG_USB_SDP,
	97	EXTCON_CHG_USB_CDP,
	98	EXTCON_CHG_USB_DCP,
5298b836	99	EXTCON_USB,
2a9de9c0	100	EXTCON_NONE,
f0312378 RP	101	};
	102
	103	struct axp288_extcon_info {
	104	struct device *dev;
	105	struct regmap *regmap;
	106	struct regmap_irq_chip_data *regmap_irqc;
76884241	107	struct gpio_desc *gpio_mux_cntl;
f0312378 RP	108	int irq[EXTCON_IRQ_END];
	109	struct extcon_dev *edev;
	110	struct notifier_block extcon_nb;
5d2199ea	111	unsigned int previous_cable;
f0312378 RP	112	};
	113
	114	/* Power up/down reason string array */
	115	static char *axp288_pwr_up_down_info[] = {
	116	"Last wake caused by user pressing the power button",
	117	"Last wake caused by a charger insertion",
	118	"Last wake caused by a battery insertion",
	119	"Last wake caused by SOC initiated global reset",
	120	"Last wake caused by cold reset",
	121	"Last shutdown caused by PMIC UVLO threshold",
	122	"Last shutdown caused by SOC initiated cold off",
	123	"Last shutdown caused by user pressing the power button",
	124	NULL,
	125	};
	126
	127	/*
	128	* Decode and log the given "reset source indicator" (rsi)
	129	* register and then clear it.
	130	*/
	131	static void axp288_extcon_log_rsi(struct axp288_extcon_info *info)
	132	{
	133	char **rsi;
	134	unsigned int val, i, clear_mask = 0;
	135	int ret;
	136
	137	ret = regmap_read(info->regmap, AXP288_PS_BOOT_REASON_REG, &val);
	138	for (i = 0, rsi = axp288_pwr_up_down_info; *rsi; rsi++, i++) {
	139	if (val & BIT(i)) {
	140	dev_dbg(info->dev, "%s\n", *rsi);
	141	clear_mask \|= BIT(i);
	142	}
	143	}
	144
	145	/* Clear the register value for next reboot (write 1 to clear bit) */
	146	regmap_write(info->regmap, AXP288_PS_BOOT_REASON_REG, clear_mask);
	147	}
	148
	149	static int axp288_handle_chrg_det_event(struct axp288_extcon_info *info)
	150	{
f0312378 RP	151	int ret, stat, cfg, pwr_stat;
f0312378 RP	152	u8 chrg_type;
5d2199ea	153	unsigned int cable = info->previous_cable;
f0312378 RP	154	bool vbus_attach = false;
	155
	156	ret = regmap_read(info->regmap, AXP288_PS_STAT_REG, &pwr_stat);
	157	if (ret < 0) {
	158	dev_err(info->dev, "failed to read vbus status\n");
	159	return ret;
	160	}
	161
5757aca1	162	vbus_attach = (pwr_stat & PS_STAT_VBUS_VALID);
f0312378	163	if (!vbus_attach)
3fe1e0e2	164	goto no_vbus;
f0312378 RP	165
	166	/* Check charger detection completion status */
	167	ret = regmap_read(info->regmap, AXP288_BC_GLOBAL_REG, &cfg);
	168	if (ret < 0)
	169	goto dev_det_ret;
	170	if (cfg & BC_GLOBAL_DET_STAT) {
	171	dev_dbg(info->dev, "can't complete the charger detection\n");
	172	goto dev_det_ret;
	173	}
	174
	175	ret = regmap_read(info->regmap, AXP288_BC_DET_STAT_REG, &stat);
	176	if (ret < 0)
	177	goto dev_det_ret;
	178
	179	chrg_type = (stat & DET_STAT_MASK) >> DET_STAT_SHIFT;
	180
	181	switch (chrg_type) {
	182	case DET_STAT_SDP:
525867db	183	dev_dbg(info->dev, "sdp cable is connected\n");
11eecf91	184	cable = EXTCON_CHG_USB_SDP;
f0312378 RP	185	break;
f0312378 RP	186	case DET_STAT_CDP:
525867db	187	dev_dbg(info->dev, "cdp cable is connected\n");
11eecf91	188	cable = EXTCON_CHG_USB_CDP;
f0312378 RP	189	break;
f0312378 RP	190	case DET_STAT_DCP:
525867db	191	dev_dbg(info->dev, "dcp cable is connected\n");
11eecf91	192	cable = EXTCON_CHG_USB_DCP;
f0312378 RP	193	break;
	194	default:
	195	dev_warn(info->dev,
	196	"disconnect or unknown or ID event\n");
	197	}
	198
3fe1e0e2 HG	199	no_vbus:
	200	/*
	201	* If VBUS is absent Connect D+/D- lines to PMIC for BC
	202	* detection. Else connect them to SOC for USB communication.
	203	*/
	204	if (info->gpio_mux_cntl)
	205	gpiod_set_value(info->gpio_mux_cntl,
	206	vbus_attach ? EXTCON_GPIO_MUX_SEL_SOC
	207	: EXTCON_GPIO_MUX_SEL_PMIC);
	208
5d2199ea	209	extcon_set_state_sync(info->edev, info->previous_cable, false);
5298b836 BW	210	if (info->previous_cable == EXTCON_CHG_USB_SDP)
	211	extcon_set_state_sync(info->edev, EXTCON_USB, false);
	212
5d2199ea HG	213	if (vbus_attach) {
5d2199ea HG	214	extcon_set_state_sync(info->edev, cable, vbus_attach);
5298b836 BW	215	if (cable == EXTCON_CHG_USB_SDP)
	216	extcon_set_state_sync(info->edev, EXTCON_USB,
	217	vbus_attach);
	218
5d2199ea HG	219	info->previous_cable = cable;
5d2199ea HG	220	}
f0312378 RP	221
	222	return 0;
	223
	224	dev_det_ret:
	225	if (ret < 0)
	226	dev_err(info->dev, "failed to detect BC Mod\n");
	227
	228	return ret;
	229	}
	230
	231	static irqreturn_t axp288_extcon_isr(int irq, void *data)
	232	{
	233	struct axp288_extcon_info *info = data;
	234	int ret;
	235
	236	ret = axp288_handle_chrg_det_event(info);
	237	if (ret < 0)
	238	dev_err(info->dev, "failed to handle the interrupt\n");
	239
	240	return IRQ_HANDLED;
	241	}
	242
be174952	243	static void axp288_extcon_enable(struct axp288_extcon_info *info)
f0312378	244	{
f0312378 RP	245	regmap_update_bits(info->regmap, AXP288_BC_GLOBAL_REG,
f0312378 RP	246	BC_GLOBAL_RUN, 0);
f0312378 RP	247	/* Enable the charger detection logic */
	248	regmap_update_bits(info->regmap, AXP288_BC_GLOBAL_REG,
	249	BC_GLOBAL_RUN, BC_GLOBAL_RUN);
	250	}
	251
	252	static int axp288_extcon_probe(struct platform_device *pdev)
	253	{
	254	struct axp288_extcon_info *info;
	255	struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
76884241	256	struct axp288_extcon_pdata *pdata = pdev->dev.platform_data;
f0312378 RP	257	int ret, i, pirq, gpio;
	258
	259	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
	260	if (!info)
	261	return -ENOMEM;
	262
	263	info->dev = &pdev->dev;
	264	info->regmap = axp20x->regmap;
	265	info->regmap_irqc = axp20x->regmap_irqc;
5d2199ea	266	info->previous_cable = EXTCON_NONE;
76884241 HG	267	if (pdata)
	268	info->gpio_mux_cntl = pdata->gpio_mux_cntl;
	269
f0312378 RP	270	platform_set_drvdata(pdev, info);
	271
	272	axp288_extcon_log_rsi(info);
	273
	274	/* Initialize extcon device */
	275	info->edev = devm_extcon_dev_allocate(&pdev->dev,
	276	axp288_extcon_cables);
	277	if (IS_ERR(info->edev)) {
	278	dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
	279	return PTR_ERR(info->edev);
	280	}
	281
	282	/* Register extcon device */
	283	ret = devm_extcon_dev_register(&pdev->dev, info->edev);
	284	if (ret) {
	285	dev_err(&pdev->dev, "failed to register extcon device\n");
	286	return ret;
	287	}
	288
f0312378	289	/* Set up gpio control for USB Mux */
76884241 HG	290	if (info->gpio_mux_cntl) {
76884241 HG	291	gpio = desc_to_gpio(info->gpio_mux_cntl);
4bf27b70	292	ret = devm_gpio_request(&pdev->dev, gpio, "USB_MUX");
f0312378 RP	293	if (ret < 0) {
	294	dev_err(&pdev->dev,
	295	"failed to request the gpio=%d\n", gpio);
4bf27b70	296	return ret;
f0312378	297	}
76884241	298	gpiod_direction_output(info->gpio_mux_cntl,
f0312378 RP	299	EXTCON_GPIO_MUX_SEL_PMIC);
	300	}
	301
	302	for (i = 0; i < EXTCON_IRQ_END; i++) {
	303	pirq = platform_get_irq(pdev, i);
	304	info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
	305	if (info->irq[i] < 0) {
	306	dev_err(&pdev->dev,
	307	"failed to get virtual interrupt=%d\n", pirq);
	308	ret = info->irq[i];
4bf27b70	309	return ret;
f0312378 RP	310	}
	311
	312	ret = devm_request_threaded_irq(&pdev->dev, info->irq[i],
	313	NULL, axp288_extcon_isr,
	314	IRQF_ONESHOT \| IRQF_NO_SUSPEND,
	315	pdev->name, info);
	316	if (ret) {
	317	dev_err(&pdev->dev, "failed to request interrupt=%d\n",
	318	info->irq[i]);
4bf27b70	319	return ret;
f0312378 RP	320	}
	321	}
	322
be174952 HG	323	/* Start charger cable type detection */
be174952 HG	324	axp288_extcon_enable(info);
f0312378 RP	325
f0312378 RP	326	return 0;
f0312378 RP	327	}
f0312378 RP	328
dd3a55fc HG	329	static const struct platform_device_id axp288_extcon_table[] = {
	330	{ .name = "axp288_extcon" },
	331	{},
	332	};
	333	MODULE_DEVICE_TABLE(platform, axp288_extcon_table);
	334
f0312378 RP	335	static struct platform_driver axp288_extcon_driver = {
f0312378 RP	336	.probe = axp288_extcon_probe,
dd3a55fc	337	.id_table = axp288_extcon_table,
f0312378 RP	338	.driver = {
	339	.name = "axp288_extcon",
	340	},
	341	};
	342	module_platform_driver(axp288_extcon_driver);
	343
	344	MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>");
	345	MODULE_DESCRIPTION("X-Powers AXP288 extcon driver");
	346	MODULE_LICENSE("GPL v2");