[deliverable/linux.git] / drivers / input / touchscreen / da9052_tsi.c

/*
 * TSI driver for Dialog DA9052
 *
 * Copyright(c) 2012 Dialog Semiconductor Ltd.
 *
 * Author: David Dajun Chen <dchen@diasemi.com>
 *
 *  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/module.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>

#include <linux/mfd/da9052/reg.h>
#include <linux/mfd/da9052/da9052.h>

#define TSI_PEN_DOWN_STATUS 0x40

struct da9052_tsi {
	struct da9052 *da9052;
	struct input_dev *dev;
	struct delayed_work ts_pen_work;
	struct mutex mutex;
	unsigned int irq_pendwn;
	unsigned int irq_datardy;
	bool stopped;
	bool adc_on;
};

static void da9052_ts_adc_toggle(struct da9052_tsi *tsi, bool on)
{
	da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 1 << 0, on);
	tsi->adc_on = on;
}

static irqreturn_t da9052_ts_pendwn_irq(int irq, void *data)
{
	struct da9052_tsi *tsi = data;

	if (!tsi->stopped) {
		/* Mask PEN_DOWN event and unmask TSI_READY event */
		disable_irq_nosync(tsi->irq_pendwn);
		enable_irq(tsi->irq_datardy);

		da9052_ts_adc_toggle(tsi, true);

		schedule_delayed_work(&tsi->ts_pen_work, HZ / 50);
	}

	return IRQ_HANDLED;
}

static void da9052_ts_read(struct da9052_tsi *tsi)
{
	struct input_dev *input = tsi->dev;
	int ret;
	u16 x, y, z;
	u8 v;

	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_X_MSB_REG);
	if (ret < 0)
		return;

	x = (u16) ret;

	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_Y_MSB_REG);
	if (ret < 0)
		return;

	y = (u16) ret;

	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_Z_MSB_REG);
	if (ret < 0)
		return;

	z = (u16) ret;

	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_LSB_REG);
	if (ret < 0)
		return;

	v = (u8) ret;

	x = ((x << 2) & 0x3fc) | (v & 0x3);
	y = ((y << 2) & 0x3fc) | ((v & 0xc) >> 2);
	z = ((z << 2) & 0x3fc) | ((v & 0x30) >> 4);

	input_report_key(input, BTN_TOUCH, 1);
	input_report_abs(input, ABS_X, x);
	input_report_abs(input, ABS_Y, y);
	input_report_abs(input, ABS_PRESSURE, z);
	input_sync(input);
}

static irqreturn_t da9052_ts_datardy_irq(int irq, void *data)
{
	struct da9052_tsi *tsi = data;

	da9052_ts_read(tsi);

	return IRQ_HANDLED;
}

static void da9052_ts_pen_work(struct work_struct *work)
{
	struct da9052_tsi *tsi = container_of(work, struct da9052_tsi,
					      ts_pen_work.work);
	if (!tsi->stopped) {
		int ret = da9052_reg_read(tsi->da9052, DA9052_TSI_LSB_REG);
		if (ret < 0 || (ret & TSI_PEN_DOWN_STATUS)) {
			/* Pen is still DOWN (or read error) */
			schedule_delayed_work(&tsi->ts_pen_work, HZ / 50);
		} else {
			struct input_dev *input = tsi->dev;

			/* Pen UP */
			da9052_ts_adc_toggle(tsi, false);

			/* Report Pen UP */
			input_report_key(input, BTN_TOUCH, 0);
			input_report_abs(input, ABS_PRESSURE, 0);
			input_sync(input);

			/*
			 * FIXME: Fixes the unhandled irq issue when quick
			 * pen down and pen up events occurs
			 */
			ret = da9052_reg_update(tsi->da9052,
						DA9052_EVENT_B_REG, 0xC0, 0xC0);
			if (ret < 0)
				return;

			/* Mask TSI_READY event and unmask PEN_DOWN event */
			disable_irq(tsi->irq_datardy);
			enable_irq(tsi->irq_pendwn);
		}
	}
}

static int da9052_ts_configure_gpio(struct da9052 *da9052)
{
	int error;

	error = da9052_reg_update(da9052, DA9052_GPIO_2_3_REG, 0x30, 0);
	if (error < 0)
		return error;

	error = da9052_reg_update(da9052, DA9052_GPIO_4_5_REG, 0x33, 0);
	if (error < 0)
		return error;

	error = da9052_reg_update(da9052, DA9052_GPIO_6_7_REG, 0x33, 0);
	if (error < 0)
		return error;

	return 0;
}

static int da9052_configure_tsi(struct da9052_tsi *tsi)
{
	int error;

	error = da9052_ts_configure_gpio(tsi->da9052);
	if (error)
		return error;

	/* Measure TSI sample every 1ms */
	error = da9052_reg_update(tsi->da9052, DA9052_ADC_CONT_REG,
				  1 << 6, 1 << 6);
	if (error < 0)
		return error;

	/* TSI_DELAY: 3 slots, TSI_SKIP: 0 slots, TSI_MODE: XYZP */
	error = da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 0xFC, 0xC0);
	if (error < 0)
		return error;

	/* Supply TSIRef through LD09 */
	error = da9052_reg_write(tsi->da9052, DA9052_LDO9_REG, 0x59);
	if (error < 0)
		return error;

	return 0;
}

static int da9052_ts_input_open(struct input_dev *input_dev)
{
	struct da9052_tsi *tsi = input_get_drvdata(input_dev);

	tsi->stopped = false;
	mb();

	/* Unmask PEN_DOWN event */
	enable_irq(tsi->irq_pendwn);

	/* Enable Pen Detect Circuit */
	return da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG,
				 1 << 1, 1 << 1);
}

static void da9052_ts_input_close(struct input_dev *input_dev)
{
	struct da9052_tsi *tsi = input_get_drvdata(input_dev);

	tsi->stopped = true;
	mb();
	disable_irq(tsi->irq_pendwn);
	cancel_delayed_work_sync(&tsi->ts_pen_work);

	if (tsi->adc_on) {
		disable_irq(tsi->irq_datardy);
		da9052_ts_adc_toggle(tsi, false);

		/*
		 * If ADC was on that means that pendwn IRQ was disabled
		 * twice and we need to enable it to keep enable/disable
		 * counter balanced. IRQ is still off though.
		 */
		enable_irq(tsi->irq_pendwn);
	}

	/* Disable Pen Detect Circuit */
	da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 1 << 1, 0);
}

static int da9052_ts_probe(struct platform_device *pdev)
{
	struct da9052 *da9052;
	struct da9052_tsi *tsi;
	struct input_dev *input_dev;
	int irq_pendwn;
	int irq_datardy;
	int error;

	da9052 = dev_get_drvdata(pdev->dev.parent);
	if (!da9052)
		return -EINVAL;

	irq_pendwn = platform_get_irq_byname(pdev, "PENDWN");
	irq_datardy = platform_get_irq_byname(pdev, "TSIRDY");
	if (irq_pendwn < 0 || irq_datardy < 0) {
		dev_err(da9052->dev, "Unable to determine device interrupts\n");
		return -ENXIO;
	}

	tsi = kzalloc(sizeof(struct da9052_tsi), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!tsi || !input_dev) {
		error = -ENOMEM;
		goto err_free_mem;
	}

	tsi->da9052 = da9052;
	tsi->dev = input_dev;
	tsi->irq_pendwn = da9052->irq_base + irq_pendwn;
	tsi->irq_datardy = da9052->irq_base + irq_datardy;
	tsi->stopped = true;
	INIT_DELAYED_WORK(&tsi->ts_pen_work, da9052_ts_pen_work);

	input_dev->id.version = 0x0101;
	input_dev->id.vendor = 0x15B6;
	input_dev->id.product = 0x9052;
	input_dev->name = "Dialog DA9052 TouchScreen Driver";
	input_dev->dev.parent = &pdev->dev;
	input_dev->open = da9052_ts_input_open;
	input_dev->close = da9052_ts_input_close;

	__set_bit(EV_ABS, input_dev->evbit);
	__set_bit(EV_KEY, input_dev->evbit);
	__set_bit(BTN_TOUCH, input_dev->keybit);

	input_set_abs_params(input_dev, ABS_X, 0, 1023, 0, 0);
	input_set_abs_params(input_dev, ABS_Y, 0, 1023, 0, 0);
	input_set_abs_params(input_dev, ABS_PRESSURE, 0, 1023, 0, 0);

	input_set_drvdata(input_dev, tsi);

	/* Disable Pen Detect Circuit */
	da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 1 << 1, 0);

	/* Disable ADC */
	da9052_ts_adc_toggle(tsi, false);

	error = request_threaded_irq(tsi->irq_pendwn,
				     NULL, da9052_ts_pendwn_irq,
				     IRQF_TRIGGER_LOW | IRQF_ONESHOT,
				     "PENDWN", tsi);
	if (error) {
		dev_err(tsi->da9052->dev,
			"Failed to register PENDWN IRQ %d, error = %d\n",
			tsi->irq_pendwn, error);
		goto err_free_mem;
	}

	error = request_threaded_irq(tsi->irq_datardy,
				     NULL, da9052_ts_datardy_irq,
				     IRQF_TRIGGER_LOW | IRQF_ONESHOT,
				     "TSIRDY", tsi);
	if (error) {
		dev_err(tsi->da9052->dev,
			"Failed to register TSIRDY IRQ %d, error = %d\n",
			tsi->irq_datardy, error);
		goto err_free_pendwn_irq;
	}

	/* Mask PEN_DOWN and TSI_READY events */
	disable_irq(tsi->irq_pendwn);
	disable_irq(tsi->irq_datardy);

	error = da9052_configure_tsi(tsi);
	if (error)
		goto err_free_datardy_irq;

	error = input_register_device(tsi->dev);
	if (error)
		goto err_free_datardy_irq;

	platform_set_drvdata(pdev, tsi);

	return 0;

err_free_datardy_irq:
	free_irq(tsi->irq_datardy, tsi);
err_free_pendwn_irq:
	free_irq(tsi->irq_pendwn, tsi);
err_free_mem:
	kfree(tsi);
	input_free_device(input_dev);

	return error;
}

static int  __devexit da9052_ts_remove(struct platform_device *pdev)
{
	struct da9052_tsi *tsi = platform_get_drvdata(pdev);

	da9052_reg_write(tsi->da9052, DA9052_LDO9_REG, 0x19);

	free_irq(tsi->irq_pendwn, tsi);
	free_irq(tsi->irq_datardy, tsi);

	input_unregister_device(tsi->dev);
	kfree(tsi);

	platform_set_drvdata(pdev, NULL);

	return 0;
}

static struct platform_driver da9052_tsi_driver = {
	.probe	= da9052_ts_probe,
	.remove	= da9052_ts_remove,
	.driver	= {
		.name	= "da9052-tsi",
		.owner	= THIS_MODULE,
	},
};

module_platform_driver(da9052_tsi_driver);

MODULE_DESCRIPTION("Touchscreen driver for Dialog Semiconductor DA9052");
MODULE_AUTHOR("Anthony Olech <Anthony.Olech@diasemi.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:da9052-tsi");
Commit	Line	Data
eead75a2 AJ	1	/*
	2	* TSI driver for Dialog DA9052
	3	*
	4	* Copyright(c) 2012 Dialog Semiconductor Ltd.
	5	*
	6	* Author: David Dajun Chen <dchen@diasemi.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*
	13	*/
	14	#include <linux/module.h>
	15	#include <linux/input.h>
	16	#include <linux/delay.h>
	17	#include <linux/platform_device.h>
	18	#include <linux/interrupt.h>
	19
	20	#include <linux/mfd/da9052/reg.h>
	21	#include <linux/mfd/da9052/da9052.h>
	22
	23	#define TSI_PEN_DOWN_STATUS 0x40
	24
	25	struct da9052_tsi {
	26	struct da9052 *da9052;
	27	struct input_dev *dev;
	28	struct delayed_work ts_pen_work;
	29	struct mutex mutex;
	30	unsigned int irq_pendwn;
	31	unsigned int irq_datardy;
	32	bool stopped;
	33	bool adc_on;
	34	};
	35
	36	static void da9052_ts_adc_toggle(struct da9052_tsi *tsi, bool on)
	37	{
	38	da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 1 << 0, on);
	39	tsi->adc_on = on;
	40	}
	41
	42	static irqreturn_t da9052_ts_pendwn_irq(int irq, void *data)
	43	{
	44	struct da9052_tsi *tsi = data;
	45
	46	if (!tsi->stopped) {
	47	/* Mask PEN_DOWN event and unmask TSI_READY event */
	48	disable_irq_nosync(tsi->irq_pendwn);
	49	enable_irq(tsi->irq_datardy);
	50
	51	da9052_ts_adc_toggle(tsi, true);
	52
	53	schedule_delayed_work(&tsi->ts_pen_work, HZ / 50);
	54	}
	55
	56	return IRQ_HANDLED;
	57	}
	58
	59	static void da9052_ts_read(struct da9052_tsi *tsi)
	60	{
	61	struct input_dev *input = tsi->dev;
	62	int ret;
	63	u16 x, y, z;
	64	u8 v;
65
66	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_X_MSB_REG);
67	if (ret < 0)
68	return;
69
70	x = (u16) ret;
71
72	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_Y_MSB_REG);
73	if (ret < 0)
74	return;
75
76	y = (u16) ret;
77
78	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_Z_MSB_REG);
79	if (ret < 0)
80	return;
81
82	z = (u16) ret;
83
84	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_LSB_REG);
85	if (ret < 0)
86	return;
87
88	v = (u8) ret;
89
90	x = ((x << 2) & 0x3fc) \| (v & 0x3);
91	y = ((y << 2) & 0x3fc) \| ((v & 0xc) >> 2);
92	z = ((z << 2) & 0x3fc) \| ((v & 0x30) >> 4);
93
94	input_report_key(input, BTN_TOUCH, 1);
95	input_report_abs(input, ABS_X, x);
96	input_report_abs(input, ABS_Y, y);
97	input_report_abs(input, ABS_PRESSURE, z);
98	input_sync(input);
99	}
100
101	static irqreturn_t da9052_ts_datardy_irq(int irq, void *data)
102	{
103	struct da9052_tsi *tsi = data;
104
105	da9052_ts_read(tsi);
106
107	return IRQ_HANDLED;
108	}
109
110	static void da9052_ts_pen_work(struct work_struct *work)
111	{
112	struct da9052_tsi *tsi = container_of(work, struct da9052_tsi,
113	ts_pen_work.work);
114	if (!tsi->stopped) {
115	int ret = da9052_reg_read(tsi->da9052, DA9052_TSI_LSB_REG);
116	if (ret < 0 \|\| (ret & TSI_PEN_DOWN_STATUS)) {
117	/* Pen is still DOWN (or read error) */
118	schedule_delayed_work(&tsi->ts_pen_work, HZ / 50);
119	} else {
120	struct input_dev *input = tsi->dev;
121
122	/* Pen UP */
123	da9052_ts_adc_toggle(tsi, false);
124
125	/* Report Pen UP */
126	input_report_key(input, BTN_TOUCH, 0);
127	input_report_abs(input, ABS_PRESSURE, 0);
128	input_sync(input);
129
130	/*
131	* FIXME: Fixes the unhandled irq issue when quick
132	* pen down and pen up events occurs
133	*/
134	ret = da9052_reg_update(tsi->da9052,
135	DA9052_EVENT_B_REG, 0xC0, 0xC0);
136	if (ret < 0)
137	return;
138
139	/* Mask TSI_READY event and unmask PEN_DOWN event */
140	disable_irq(tsi->irq_datardy);
141	enable_irq(tsi->irq_pendwn);
142	}
143	}
144	}
145
5298cc4c	146	static int da9052_ts_configure_gpio(struct da9052 *da9052)
eead75a2 AJ	147	{
	148	int error;
	149
	150	error = da9052_reg_update(da9052, DA9052_GPIO_2_3_REG, 0x30, 0);
	151	if (error < 0)
	152	return error;
	153
	154	error = da9052_reg_update(da9052, DA9052_GPIO_4_5_REG, 0x33, 0);
	155	if (error < 0)
	156	return error;
	157
	158	error = da9052_reg_update(da9052, DA9052_GPIO_6_7_REG, 0x33, 0);
	159	if (error < 0)
	160	return error;
	161
	162	return 0;
	163	}
	164
5298cc4c	165	static int da9052_configure_tsi(struct da9052_tsi *tsi)
eead75a2 AJ	166	{
	167	int error;
	168
	169	error = da9052_ts_configure_gpio(tsi->da9052);
	170	if (error)
	171	return error;
	172
	173	/* Measure TSI sample every 1ms */
	174	error = da9052_reg_update(tsi->da9052, DA9052_ADC_CONT_REG,
	175	1 << 6, 1 << 6);
	176	if (error < 0)
	177	return error;
	178
	179	/* TSI_DELAY: 3 slots, TSI_SKIP: 0 slots, TSI_MODE: XYZP */
	180	error = da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 0xFC, 0xC0);
	181	if (error < 0)
	182	return error;
	183
	184	/* Supply TSIRef through LD09 */
	185	error = da9052_reg_write(tsi->da9052, DA9052_LDO9_REG, 0x59);
	186	if (error < 0)
	187	return error;
	188
	189	return 0;
	190	}
	191
	192	static int da9052_ts_input_open(struct input_dev *input_dev)
	193	{
	194	struct da9052_tsi *tsi = input_get_drvdata(input_dev);
	195
	196	tsi->stopped = false;
	197	mb();
	198
	199	/* Unmask PEN_DOWN event */
	200	enable_irq(tsi->irq_pendwn);
	201
	202	/* Enable Pen Detect Circuit */
	203	return da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG,
	204	1 << 1, 1 << 1);
	205	}
	206
	207	static void da9052_ts_input_close(struct input_dev *input_dev)
	208	{
	209	struct da9052_tsi *tsi = input_get_drvdata(input_dev);
	210
	211	tsi->stopped = true;
	212	mb();
	213	disable_irq(tsi->irq_pendwn);
	214	cancel_delayed_work_sync(&tsi->ts_pen_work);
	215
	216	if (tsi->adc_on) {
	217	disable_irq(tsi->irq_datardy);
	218	da9052_ts_adc_toggle(tsi, false);
	219
	220	/*
	221	* If ADC was on that means that pendwn IRQ was disabled
	222	* twice and we need to enable it to keep enable/disable
	223	* counter balanced. IRQ is still off though.
	224	*/
	225	enable_irq(tsi->irq_pendwn);
	226	}
	227
	228	/* Disable Pen Detect Circuit */
	229	da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 1 << 1, 0);
230	}
231
5298cc4c	232	static int da9052_ts_probe(struct platform_device *pdev)
eead75a2 AJ	233	{
	234	struct da9052 *da9052;
	235	struct da9052_tsi *tsi;
	236	struct input_dev *input_dev;
	237	int irq_pendwn;
	238	int irq_datardy;
	239	int error;
	240
	241	da9052 = dev_get_drvdata(pdev->dev.parent);
	242	if (!da9052)
	243	return -EINVAL;
	244
	245	irq_pendwn = platform_get_irq_byname(pdev, "PENDWN");
	246	irq_datardy = platform_get_irq_byname(pdev, "TSIRDY");
	247	if (irq_pendwn < 0 \|\| irq_datardy < 0) {
	248	dev_err(da9052->dev, "Unable to determine device interrupts\n");
	249	return -ENXIO;
	250	}
	251
	252	tsi = kzalloc(sizeof(struct da9052_tsi), GFP_KERNEL);
	253	input_dev = input_allocate_device();
	254	if (!tsi \|\| !input_dev) {
	255	error = -ENOMEM;
	256	goto err_free_mem;
	257	}
	258
	259	tsi->da9052 = da9052;
	260	tsi->dev = input_dev;
	261	tsi->irq_pendwn = da9052->irq_base + irq_pendwn;
	262	tsi->irq_datardy = da9052->irq_base + irq_datardy;
	263	tsi->stopped = true;
	264	INIT_DELAYED_WORK(&tsi->ts_pen_work, da9052_ts_pen_work);
	265
	266	input_dev->id.version = 0x0101;
	267	input_dev->id.vendor = 0x15B6;
	268	input_dev->id.product = 0x9052;
	269	input_dev->name = "Dialog DA9052 TouchScreen Driver";
	270	input_dev->dev.parent = &pdev->dev;
	271	input_dev->open = da9052_ts_input_open;
	272	input_dev->close = da9052_ts_input_close;
	273
	274	__set_bit(EV_ABS, input_dev->evbit);
	275	__set_bit(EV_KEY, input_dev->evbit);
	276	__set_bit(BTN_TOUCH, input_dev->keybit);
	277
	278	input_set_abs_params(input_dev, ABS_X, 0, 1023, 0, 0);
	279	input_set_abs_params(input_dev, ABS_Y, 0, 1023, 0, 0);
	280	input_set_abs_params(input_dev, ABS_PRESSURE, 0, 1023, 0, 0);
	281
	282	input_set_drvdata(input_dev, tsi);
	283
	284	/* Disable Pen Detect Circuit */
	285	da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 1 << 1, 0);
	286
	287	/* Disable ADC */
	288	da9052_ts_adc_toggle(tsi, false);
	289
	290	error = request_threaded_irq(tsi->irq_pendwn,
	291	NULL, da9052_ts_pendwn_irq,
	292	IRQF_TRIGGER_LOW \| IRQF_ONESHOT,
	293	"PENDWN", tsi);
	294	if (error) {
	295	dev_err(tsi->da9052->dev,
	296	"Failed to register PENDWN IRQ %d, error = %d\n",
297	tsi->irq_pendwn, error);
298	goto err_free_mem;
299	}
300
301	error = request_threaded_irq(tsi->irq_datardy,
302	NULL, da9052_ts_datardy_irq,
303	IRQF_TRIGGER_LOW \| IRQF_ONESHOT,
304	"TSIRDY", tsi);
305	if (error) {
306	dev_err(tsi->da9052->dev,
307	"Failed to register TSIRDY IRQ %d, error = %d\n",
308	tsi->irq_datardy, error);
309	goto err_free_pendwn_irq;
310	}
311
312	/* Mask PEN_DOWN and TSI_READY events */
313	disable_irq(tsi->irq_pendwn);
314	disable_irq(tsi->irq_datardy);
315
316	error = da9052_configure_tsi(tsi);
317	if (error)
318	goto err_free_datardy_irq;
319
320	error = input_register_device(tsi->dev);
321	if (error)
322	goto err_free_datardy_irq;
323
324	platform_set_drvdata(pdev, tsi);
325
326	return 0;
327
328	err_free_datardy_irq:
329	free_irq(tsi->irq_datardy, tsi);
330	err_free_pendwn_irq:
331	free_irq(tsi->irq_pendwn, tsi);
332	err_free_mem:
333	kfree(tsi);
334	input_free_device(input_dev);
335
336	return error;
337	}
338
339	static int __devexit da9052_ts_remove(struct platform_device *pdev)
340	{
341	struct da9052_tsi *tsi = platform_get_drvdata(pdev);
342
343	da9052_reg_write(tsi->da9052, DA9052_LDO9_REG, 0x19);
344
345	free_irq(tsi->irq_pendwn, tsi);
346	free_irq(tsi->irq_datardy, tsi);
347
348	input_unregister_device(tsi->dev);
349	kfree(tsi);
350
351	platform_set_drvdata(pdev, NULL);
352
353	return 0;
354	}
355
356	static struct platform_driver da9052_tsi_driver = {
357	.probe = da9052_ts_probe,
1cb0aa88	358	.remove = da9052_ts_remove,
eead75a2 AJ	359	.driver = {
	360	.name = "da9052-tsi",
	361	.owner = THIS_MODULE,
	362	},
	363	};
	364
	365	module_platform_driver(da9052_tsi_driver);
	366
	367	MODULE_DESCRIPTION("Touchscreen driver for Dialog Semiconductor DA9052");
	368	MODULE_AUTHOR("Anthony Olech <Anthony.Olech@diasemi.com>");
	369	MODULE_LICENSE("GPL");
	370	MODULE_ALIAS("platform:da9052-tsi");