[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

/* IRQ enable-1 register */
#define PWRSRC_IRQ_CFG_MASK		(BIT(4)|BIT(3)|BIT(2))

/* IRQ enable-6 register */
#define BC12_IRQ_CFG_MASK		BIT(1)

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,
	AXP288_PWRSRC_IRQ_CFG_REG	= 0x40,
	AXP288_BC12_IRQ_CFG_REG		= 0x45,
};

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_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;
};

/* 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)
{
	static unsigned int cable;
	int ret, stat, cfg, pwr_stat;
	u8 chrg_type;
	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_PRESENT);
	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, cable, vbus_attach);

	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_irq(struct axp288_extcon_info *info)
{
	/* Unmask VBUS interrupt */
	regmap_write(info->regmap, AXP288_PWRSRC_IRQ_CFG_REG,
						PWRSRC_IRQ_CFG_MASK);
	regmap_update_bits(info->regmap, AXP288_BC_GLOBAL_REG,
						BC_GLOBAL_RUN, 0);
	/* Unmask the BC1.2 complete interrupts */
	regmap_write(info->regmap, AXP288_BC12_IRQ_CFG_REG, BC12_IRQ_CFG_MASK);
	/* 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;
	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;
		}
	}

	/* Enable interrupts */
	axp288_extcon_enable_irq(info);

	return 0;
}

static struct platform_driver axp288_extcon_driver = {
	.probe = axp288_extcon_probe,
	.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
	73	/* IRQ enable-1 register */
	74	#define PWRSRC_IRQ_CFG_MASK (BIT(4)\|BIT(3)\|BIT(2))
	75
	76	/* IRQ enable-6 register */
	77	#define BC12_IRQ_CFG_MASK BIT(1)
	78
f0312378 RP	79	enum axp288_extcon_reg {
	80	AXP288_PS_STAT_REG = 0x00,
	81	AXP288_PS_BOOT_REASON_REG = 0x02,
	82	AXP288_BC_GLOBAL_REG = 0x2c,
	83	AXP288_BC_VBUS_CNTL_REG = 0x2d,
	84	AXP288_BC_USB_STAT_REG = 0x2e,
	85	AXP288_BC_DET_STAT_REG = 0x2f,
	86	AXP288_PWRSRC_IRQ_CFG_REG = 0x40,
	87	AXP288_BC12_IRQ_CFG_REG = 0x45,
	88	};
	89
	90	enum axp288_mux_select {
	91	EXTCON_GPIO_MUX_SEL_PMIC = 0,
	92	EXTCON_GPIO_MUX_SEL_SOC,
	93	};
	94
	95	enum axp288_extcon_irq {
	96	VBUS_FALLING_IRQ = 0,
	97	VBUS_RISING_IRQ,
	98	MV_CHNG_IRQ,
	99	BC_USB_CHNG_IRQ,
	100	EXTCON_IRQ_END,
	101	};
	102
73b6ecdb	103	static const unsigned int axp288_extcon_cables[] = {
11eecf91 CC	104	EXTCON_CHG_USB_SDP,
	105	EXTCON_CHG_USB_CDP,
	106	EXTCON_CHG_USB_DCP,
2a9de9c0	107	EXTCON_NONE,
f0312378 RP	108	};
	109
	110	struct axp288_extcon_info {
	111	struct device *dev;
	112	struct regmap *regmap;
	113	struct regmap_irq_chip_data *regmap_irqc;
76884241	114	struct gpio_desc *gpio_mux_cntl;
f0312378 RP	115	int irq[EXTCON_IRQ_END];
	116	struct extcon_dev *edev;
	117	struct notifier_block extcon_nb;
f0312378 RP	118	};
	119
	120	/* Power up/down reason string array */
	121	static char *axp288_pwr_up_down_info[] = {
	122	"Last wake caused by user pressing the power button",
	123	"Last wake caused by a charger insertion",
	124	"Last wake caused by a battery insertion",
	125	"Last wake caused by SOC initiated global reset",
	126	"Last wake caused by cold reset",
	127	"Last shutdown caused by PMIC UVLO threshold",
	128	"Last shutdown caused by SOC initiated cold off",
	129	"Last shutdown caused by user pressing the power button",
	130	NULL,
	131	};
	132
	133	/*
	134	* Decode and log the given "reset source indicator" (rsi)
	135	* register and then clear it.
	136	*/
	137	static void axp288_extcon_log_rsi(struct axp288_extcon_info *info)
	138	{
	139	char **rsi;
	140	unsigned int val, i, clear_mask = 0;
	141	int ret;
	142
	143	ret = regmap_read(info->regmap, AXP288_PS_BOOT_REASON_REG, &val);
	144	for (i = 0, rsi = axp288_pwr_up_down_info; *rsi; rsi++, i++) {
	145	if (val & BIT(i)) {
	146	dev_dbg(info->dev, "%s\n", *rsi);
	147	clear_mask \|= BIT(i);
	148	}
	149	}
	150
	151	/* Clear the register value for next reboot (write 1 to clear bit) */
	152	regmap_write(info->regmap, AXP288_PS_BOOT_REASON_REG, clear_mask);
	153	}
	154
	155	static int axp288_handle_chrg_det_event(struct axp288_extcon_info *info)
	156	{
73b6ecdb	157	static unsigned int cable;
f0312378 RP	158	int ret, stat, cfg, pwr_stat;
	159	u8 chrg_type;
	160	bool vbus_attach = false;
	161
	162	ret = regmap_read(info->regmap, AXP288_PS_STAT_REG, &pwr_stat);
	163	if (ret < 0) {
	164	dev_err(info->dev, "failed to read vbus status\n");
	165	return ret;
	166	}
	167
	168	vbus_attach = (pwr_stat & PS_STAT_VBUS_PRESENT);
	169	if (!vbus_attach)
3fe1e0e2	170	goto no_vbus;
f0312378 RP	171
	172	/* Check charger detection completion status */
	173	ret = regmap_read(info->regmap, AXP288_BC_GLOBAL_REG, &cfg);
	174	if (ret < 0)
	175	goto dev_det_ret;
	176	if (cfg & BC_GLOBAL_DET_STAT) {
	177	dev_dbg(info->dev, "can't complete the charger detection\n");
	178	goto dev_det_ret;
	179	}
	180
	181	ret = regmap_read(info->regmap, AXP288_BC_DET_STAT_REG, &stat);
	182	if (ret < 0)
	183	goto dev_det_ret;
	184
	185	chrg_type = (stat & DET_STAT_MASK) >> DET_STAT_SHIFT;
	186
	187	switch (chrg_type) {
	188	case DET_STAT_SDP:
525867db	189	dev_dbg(info->dev, "sdp cable is connected\n");
11eecf91	190	cable = EXTCON_CHG_USB_SDP;
f0312378 RP	191	break;
f0312378 RP	192	case DET_STAT_CDP:
525867db	193	dev_dbg(info->dev, "cdp cable is connected\n");
11eecf91	194	cable = EXTCON_CHG_USB_CDP;
f0312378 RP	195	break;
f0312378 RP	196	case DET_STAT_DCP:
525867db	197	dev_dbg(info->dev, "dcp cable is connected\n");
11eecf91	198	cable = EXTCON_CHG_USB_DCP;
f0312378 RP	199	break;
	200	default:
	201	dev_warn(info->dev,
	202	"disconnect or unknown or ID event\n");
	203	}
	204
3fe1e0e2 HG	205	no_vbus:
	206	/*
	207	* If VBUS is absent Connect D+/D- lines to PMIC for BC
	208	* detection. Else connect them to SOC for USB communication.
	209	*/
	210	if (info->gpio_mux_cntl)
	211	gpiod_set_value(info->gpio_mux_cntl,
	212	vbus_attach ? EXTCON_GPIO_MUX_SEL_SOC
	213	: EXTCON_GPIO_MUX_SEL_PMIC);
	214
	215	extcon_set_state_sync(info->edev, cable, vbus_attach);
f0312378 RP	216
	217	return 0;
	218
	219	dev_det_ret:
	220	if (ret < 0)
	221	dev_err(info->dev, "failed to detect BC Mod\n");
	222
	223	return ret;
	224	}
	225
	226	static irqreturn_t axp288_extcon_isr(int irq, void *data)
	227	{
	228	struct axp288_extcon_info *info = data;
	229	int ret;
	230
	231	ret = axp288_handle_chrg_det_event(info);
	232	if (ret < 0)
	233	dev_err(info->dev, "failed to handle the interrupt\n");
	234
	235	return IRQ_HANDLED;
	236	}
	237
	238	static void axp288_extcon_enable_irq(struct axp288_extcon_info *info)
	239	{
	240	/* Unmask VBUS interrupt */
	241	regmap_write(info->regmap, AXP288_PWRSRC_IRQ_CFG_REG,
	242	PWRSRC_IRQ_CFG_MASK);
	243	regmap_update_bits(info->regmap, AXP288_BC_GLOBAL_REG,
	244	BC_GLOBAL_RUN, 0);
	245	/* Unmask the BC1.2 complete interrupts */
	246	regmap_write(info->regmap, AXP288_BC12_IRQ_CFG_REG, BC12_IRQ_CFG_MASK);
	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;
76884241 HG	266	if (pdata)
	267	info->gpio_mux_cntl = pdata->gpio_mux_cntl;
	268
f0312378 RP	269	platform_set_drvdata(pdev, info);
	270
	271	axp288_extcon_log_rsi(info);
	272
	273	/* Initialize extcon device */
	274	info->edev = devm_extcon_dev_allocate(&pdev->dev,
	275	axp288_extcon_cables);
	276	if (IS_ERR(info->edev)) {
	277	dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
	278	return PTR_ERR(info->edev);
	279	}
	280
	281	/* Register extcon device */
	282	ret = devm_extcon_dev_register(&pdev->dev, info->edev);
	283	if (ret) {
	284	dev_err(&pdev->dev, "failed to register extcon device\n");
	285	return ret;
	286	}
	287
f0312378	288	/* Set up gpio control for USB Mux */
76884241 HG	289	if (info->gpio_mux_cntl) {
76884241 HG	290	gpio = desc_to_gpio(info->gpio_mux_cntl);
4bf27b70	291	ret = devm_gpio_request(&pdev->dev, gpio, "USB_MUX");
f0312378 RP	292	if (ret < 0) {
	293	dev_err(&pdev->dev,
	294	"failed to request the gpio=%d\n", gpio);
4bf27b70	295	return ret;
f0312378	296	}
76884241	297	gpiod_direction_output(info->gpio_mux_cntl,
f0312378 RP	298	EXTCON_GPIO_MUX_SEL_PMIC);
	299	}
	300
	301	for (i = 0; i < EXTCON_IRQ_END; i++) {
	302	pirq = platform_get_irq(pdev, i);
	303	info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
	304	if (info->irq[i] < 0) {
	305	dev_err(&pdev->dev,
	306	"failed to get virtual interrupt=%d\n", pirq);
	307	ret = info->irq[i];
4bf27b70	308	return ret;
f0312378 RP	309	}
	310
	311	ret = devm_request_threaded_irq(&pdev->dev, info->irq[i],
	312	NULL, axp288_extcon_isr,
	313	IRQF_ONESHOT \| IRQF_NO_SUSPEND,
	314	pdev->name, info);
	315	if (ret) {
	316	dev_err(&pdev->dev, "failed to request interrupt=%d\n",
	317	info->irq[i]);
4bf27b70	318	return ret;
f0312378 RP	319	}
	320	}
	321
	322	/* Enable interrupts */
	323	axp288_extcon_enable_irq(info);
	324
	325	return 0;
f0312378 RP	326	}
	327
	328	static struct platform_driver axp288_extcon_driver = {
	329	.probe = axp288_extcon_probe,
f0312378 RP	330	.driver = {
	331	.name = "axp288_extcon",
	332	},
	333	};
	334	module_platform_driver(axp288_extcon_driver);
	335
	336	MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>");
	337	MODULE_DESCRIPTION("X-Powers AXP288 extcon driver");
	338	MODULE_LICENSE("GPL v2");