[linux-block.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-provider.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;
	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);
		if (pirq < 0)
			return pirq;

		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	24	#include <linux/notifier.h>
176aa360	25	#include <linux/extcon-provider.h>
f0312378 RP	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];
f0312378 RP	109	struct extcon_dev *edev;
5d2199ea	110	unsigned int previous_cable;
f0312378 RP	111	};
	112
	113	/* Power up/down reason string array */
	114	static char *axp288_pwr_up_down_info[] = {
	115	"Last wake caused by user pressing the power button",
	116	"Last wake caused by a charger insertion",
	117	"Last wake caused by a battery insertion",
	118	"Last wake caused by SOC initiated global reset",
	119	"Last wake caused by cold reset",
	120	"Last shutdown caused by PMIC UVLO threshold",
	121	"Last shutdown caused by SOC initiated cold off",
	122	"Last shutdown caused by user pressing the power button",
	123	NULL,
	124	};
	125
	126	/*
	127	* Decode and log the given "reset source indicator" (rsi)
	128	* register and then clear it.
	129	*/
	130	static void axp288_extcon_log_rsi(struct axp288_extcon_info *info)
	131	{
	132	char **rsi;
	133	unsigned int val, i, clear_mask = 0;
	134	int ret;
	135
	136	ret = regmap_read(info->regmap, AXP288_PS_BOOT_REASON_REG, &val);
	137	for (i = 0, rsi = axp288_pwr_up_down_info; *rsi; rsi++, i++) {
	138	if (val & BIT(i)) {
	139	dev_dbg(info->dev, "%s\n", *rsi);
	140	clear_mask \|= BIT(i);
	141	}
	142	}
	143
	144	/* Clear the register value for next reboot (write 1 to clear bit) */
	145	regmap_write(info->regmap, AXP288_PS_BOOT_REASON_REG, clear_mask);
	146	}
	147
	148	static int axp288_handle_chrg_det_event(struct axp288_extcon_info *info)
	149	{
f0312378 RP	150	int ret, stat, cfg, pwr_stat;
f0312378 RP	151	u8 chrg_type;
5d2199ea	152	unsigned int cable = info->previous_cable;
f0312378 RP	153	bool vbus_attach = false;
	154
	155	ret = regmap_read(info->regmap, AXP288_PS_STAT_REG, &pwr_stat);
	156	if (ret < 0) {
	157	dev_err(info->dev, "failed to read vbus status\n");
	158	return ret;
	159	}
	160
5757aca1	161	vbus_attach = (pwr_stat & PS_STAT_VBUS_VALID);
f0312378	162	if (!vbus_attach)
3fe1e0e2	163	goto no_vbus;
f0312378 RP	164
	165	/* Check charger detection completion status */
	166	ret = regmap_read(info->regmap, AXP288_BC_GLOBAL_REG, &cfg);
	167	if (ret < 0)
	168	goto dev_det_ret;
	169	if (cfg & BC_GLOBAL_DET_STAT) {
	170	dev_dbg(info->dev, "can't complete the charger detection\n");
	171	goto dev_det_ret;
	172	}
	173
	174	ret = regmap_read(info->regmap, AXP288_BC_DET_STAT_REG, &stat);
	175	if (ret < 0)
	176	goto dev_det_ret;
	177
	178	chrg_type = (stat & DET_STAT_MASK) >> DET_STAT_SHIFT;
	179
	180	switch (chrg_type) {
	181	case DET_STAT_SDP:
525867db	182	dev_dbg(info->dev, "sdp cable is connected\n");
11eecf91	183	cable = EXTCON_CHG_USB_SDP;
f0312378 RP	184	break;
f0312378 RP	185	case DET_STAT_CDP:
525867db	186	dev_dbg(info->dev, "cdp cable is connected\n");
11eecf91	187	cable = EXTCON_CHG_USB_CDP;
f0312378 RP	188	break;
f0312378 RP	189	case DET_STAT_DCP:
525867db	190	dev_dbg(info->dev, "dcp cable is connected\n");
11eecf91	191	cable = EXTCON_CHG_USB_DCP;
f0312378 RP	192	break;
	193	default:
	194	dev_warn(info->dev,
	195	"disconnect or unknown or ID event\n");
	196	}
	197
3fe1e0e2 HG	198	no_vbus:
	199	/*
	200	* If VBUS is absent Connect D+/D- lines to PMIC for BC
	201	* detection. Else connect them to SOC for USB communication.
	202	*/
	203	if (info->gpio_mux_cntl)
	204	gpiod_set_value(info->gpio_mux_cntl,
	205	vbus_attach ? EXTCON_GPIO_MUX_SEL_SOC
	206	: EXTCON_GPIO_MUX_SEL_PMIC);
	207
5d2199ea	208	extcon_set_state_sync(info->edev, info->previous_cable, false);
5298b836 BW	209	if (info->previous_cable == EXTCON_CHG_USB_SDP)
	210	extcon_set_state_sync(info->edev, EXTCON_USB, false);
	211
5d2199ea HG	212	if (vbus_attach) {
5d2199ea HG	213	extcon_set_state_sync(info->edev, cable, vbus_attach);
5298b836 BW	214	if (cable == EXTCON_CHG_USB_SDP)
	215	extcon_set_state_sync(info->edev, EXTCON_USB,
	216	vbus_attach);
	217
5d2199ea HG	218	info->previous_cable = cable;
5d2199ea HG	219	}
f0312378 RP	220
	221	return 0;
	222
	223	dev_det_ret:
	224	if (ret < 0)
	225	dev_err(info->dev, "failed to detect BC Mod\n");
	226
	227	return ret;
	228	}
	229
	230	static irqreturn_t axp288_extcon_isr(int irq, void *data)
	231	{
	232	struct axp288_extcon_info *info = data;
	233	int ret;
	234
	235	ret = axp288_handle_chrg_det_event(info);
	236	if (ret < 0)
	237	dev_err(info->dev, "failed to handle the interrupt\n");
	238
	239	return IRQ_HANDLED;
	240	}
	241
be174952	242	static void axp288_extcon_enable(struct axp288_extcon_info *info)
f0312378	243	{
f0312378 RP	244	regmap_update_bits(info->regmap, AXP288_BC_GLOBAL_REG,
f0312378 RP	245	BC_GLOBAL_RUN, 0);
f0312378 RP	246	/* Enable the charger detection logic */
	247	regmap_update_bits(info->regmap, AXP288_BC_GLOBAL_REG,
	248	BC_GLOBAL_RUN, BC_GLOBAL_RUN);
	249	}
	250
	251	static int axp288_extcon_probe(struct platform_device *pdev)
	252	{
	253	struct axp288_extcon_info *info;
	254	struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
76884241	255	struct axp288_extcon_pdata *pdata = pdev->dev.platform_data;
f0312378 RP	256	int ret, i, pirq, gpio;
	257
	258	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
	259	if (!info)
	260	return -ENOMEM;
	261
	262	info->dev = &pdev->dev;
	263	info->regmap = axp20x->regmap;
	264	info->regmap_irqc = axp20x->regmap_irqc;
5d2199ea	265	info->previous_cable = EXTCON_NONE;
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);
01e1429b AY	303	if (pirq < 0)
	304	return pirq;
	305
f0312378 RP	306	info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
	307	if (info->irq[i] < 0) {
	308	dev_err(&pdev->dev,
	309	"failed to get virtual interrupt=%d\n", pirq);
	310	ret = info->irq[i];
4bf27b70	311	return ret;
f0312378 RP	312	}
	313
	314	ret = devm_request_threaded_irq(&pdev->dev, info->irq[i],
	315	NULL, axp288_extcon_isr,
	316	IRQF_ONESHOT \| IRQF_NO_SUSPEND,
	317	pdev->name, info);
	318	if (ret) {
	319	dev_err(&pdev->dev, "failed to request interrupt=%d\n",
	320	info->irq[i]);
4bf27b70	321	return ret;
f0312378 RP	322	}
	323	}
	324
be174952 HG	325	/* Start charger cable type detection */
be174952 HG	326	axp288_extcon_enable(info);
f0312378 RP	327
f0312378 RP	328	return 0;
f0312378 RP	329	}
f0312378 RP	330
dd3a55fc HG	331	static const struct platform_device_id axp288_extcon_table[] = {
	332	{ .name = "axp288_extcon" },
	333	{},
	334	};
	335	MODULE_DEVICE_TABLE(platform, axp288_extcon_table);
	336
f0312378 RP	337	static struct platform_driver axp288_extcon_driver = {
f0312378 RP	338	.probe = axp288_extcon_probe,
dd3a55fc	339	.id_table = axp288_extcon_table,
f0312378 RP	340	.driver = {
	341	.name = "axp288_extcon",
	342	},
	343	};
	344	module_platform_driver(axp288_extcon_driver);
	345
	346	MODULE_AUTHOR("Ramakrishna Pallala <ramakrishna.pallala@intel.com>");
	347	MODULE_DESCRIPTION("X-Powers AXP288 extcon driver");
	348	MODULE_LICENSE("GPL v2");