[mirror_ubuntu-jammy-kernel.git] / drivers / input / touchscreen / da9052_tsi.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * TSI driver for Dialog DA9052
 *
 * Copyright(c) 2012 Dialog Semiconductor Ltd.
 *
 * Author: David Dajun Chen <dchen@diasemi.com>
 */
#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;
	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 */
		da9052_disable_irq_nosync(tsi->da9052, DA9052_IRQ_PENDOWN);
		da9052_enable_irq(tsi->da9052, DA9052_IRQ_TSIREADY);

		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 */
			da9052_disable_irq(tsi->da9052, DA9052_IRQ_TSIREADY);
			da9052_enable_irq(tsi->da9052, DA9052_IRQ_PENDOWN);
		}
	}
}

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 */
	da9052_enable_irq(tsi->da9052, DA9052_IRQ_PENDOWN);

	/* 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();
	da9052_disable_irq(tsi->da9052, DA9052_IRQ_PENDOWN);
	cancel_delayed_work_sync(&tsi->ts_pen_work);

	if (tsi->adc_on) {
		da9052_disable_irq(tsi->da9052, DA9052_IRQ_TSIREADY);
		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.
		 */
		da9052_enable_irq(tsi->da9052, DA9052_IRQ_PENDOWN);
	}

	/* 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 error;

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

	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->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 = da9052_request_irq(tsi->da9052, DA9052_IRQ_PENDOWN,
				"pendown-irq", da9052_ts_pendwn_irq, tsi);
	if (error) {
		dev_err(tsi->da9052->dev,
			"Failed to register PENDWN IRQ: %d\n", error);
		goto err_free_mem;
	}

	error = da9052_request_irq(tsi->da9052, DA9052_IRQ_TSIREADY,
				"tsiready-irq", da9052_ts_datardy_irq, tsi);
	if (error) {
		dev_err(tsi->da9052->dev,
			"Failed to register TSIRDY IRQ :%d\n", error);
		goto err_free_pendwn_irq;
	}

	/* Mask PEN_DOWN and TSI_READY events */
	da9052_disable_irq(tsi->da9052, DA9052_IRQ_PENDOWN);
	da9052_disable_irq(tsi->da9052, DA9052_IRQ_TSIREADY);

	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:
	da9052_free_irq(tsi->da9052, DA9052_IRQ_TSIREADY, tsi);
err_free_pendwn_irq:
	da9052_free_irq(tsi->da9052, DA9052_IRQ_PENDOWN, tsi);
err_free_mem:
	kfree(tsi);
	input_free_device(input_dev);

	return error;
}

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

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

	da9052_free_irq(tsi->da9052, DA9052_IRQ_TSIREADY, tsi);
	da9052_free_irq(tsi->da9052, DA9052_IRQ_PENDOWN, tsi);

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

	return 0;
}

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

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
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
eead75a2 AJ	2	/*
	3	* TSI driver for Dialog DA9052
	4	*
	5	* Copyright(c) 2012 Dialog Semiconductor Ltd.
	6	*
	7	* Author: David Dajun Chen <dchen@diasemi.com>
eead75a2 AJ	8	*/
	9	#include <linux/module.h>
	10	#include <linux/input.h>
	11	#include <linux/delay.h>
	12	#include <linux/platform_device.h>
	13	#include <linux/interrupt.h>
	14
	15	#include <linux/mfd/da9052/reg.h>
	16	#include <linux/mfd/da9052/da9052.h>
	17
	18	#define TSI_PEN_DOWN_STATUS 0x40
	19
	20	struct da9052_tsi {
	21	struct da9052 *da9052;
	22	struct input_dev *dev;
	23	struct delayed_work ts_pen_work;
eead75a2 AJ	24	bool stopped;
	25	bool adc_on;
	26	};
	27
	28	static void da9052_ts_adc_toggle(struct da9052_tsi *tsi, bool on)
	29	{
	30	da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 1 << 0, on);
	31	tsi->adc_on = on;
	32	}
	33
	34	static irqreturn_t da9052_ts_pendwn_irq(int irq, void *data)
	35	{
	36	struct da9052_tsi *tsi = data;
	37
	38	if (!tsi->stopped) {
	39	/* Mask PEN_DOWN event and unmask TSI_READY event */
8f520803 FE	40	da9052_disable_irq_nosync(tsi->da9052, DA9052_IRQ_PENDOWN);
8f520803 FE	41	da9052_enable_irq(tsi->da9052, DA9052_IRQ_TSIREADY);
eead75a2 AJ	42
	43	da9052_ts_adc_toggle(tsi, true);
	44
	45	schedule_delayed_work(&tsi->ts_pen_work, HZ / 50);
	46	}
	47
	48	return IRQ_HANDLED;
	49	}
	50
	51	static void da9052_ts_read(struct da9052_tsi *tsi)
	52	{
	53	struct input_dev *input = tsi->dev;
	54	int ret;
	55	u16 x, y, z;
	56	u8 v;
	57
	58	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_X_MSB_REG);
	59	if (ret < 0)
	60	return;
	61
	62	x = (u16) ret;
	63
	64	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_Y_MSB_REG);
	65	if (ret < 0)
	66	return;
	67
	68	y = (u16) ret;
	69
	70	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_Z_MSB_REG);
	71	if (ret < 0)
	72	return;
	73
	74	z = (u16) ret;
	75
	76	ret = da9052_reg_read(tsi->da9052, DA9052_TSI_LSB_REG);
	77	if (ret < 0)
	78	return;
	79
	80	v = (u8) ret;
	81
	82	x = ((x << 2) & 0x3fc) \| (v & 0x3);
	83	y = ((y << 2) & 0x3fc) \| ((v & 0xc) >> 2);
	84	z = ((z << 2) & 0x3fc) \| ((v & 0x30) >> 4);
	85
	86	input_report_key(input, BTN_TOUCH, 1);
	87	input_report_abs(input, ABS_X, x);
	88	input_report_abs(input, ABS_Y, y);
	89	input_report_abs(input, ABS_PRESSURE, z);
	90	input_sync(input);
	91	}
	92
	93	static irqreturn_t da9052_ts_datardy_irq(int irq, void *data)
	94	{
	95	struct da9052_tsi *tsi = data;
	96
	97	da9052_ts_read(tsi);
	98
	99	return IRQ_HANDLED;
	100	}
	101
	102	static void da9052_ts_pen_work(struct work_struct *work)
	103	{
	104	struct da9052_tsi *tsi = container_of(work, struct da9052_tsi,
	105	ts_pen_work.work);
106	if (!tsi->stopped) {
107	int ret = da9052_reg_read(tsi->da9052, DA9052_TSI_LSB_REG);
108	if (ret < 0 \|\| (ret & TSI_PEN_DOWN_STATUS)) {
109	/* Pen is still DOWN (or read error) */
110	schedule_delayed_work(&tsi->ts_pen_work, HZ / 50);
111	} else {
112	struct input_dev *input = tsi->dev;
113
114	/* Pen UP */
115	da9052_ts_adc_toggle(tsi, false);
116
117	/* Report Pen UP */
118	input_report_key(input, BTN_TOUCH, 0);
119	input_report_abs(input, ABS_PRESSURE, 0);
120	input_sync(input);
121
122	/*
123	* FIXME: Fixes the unhandled irq issue when quick
124	* pen down and pen up events occurs
125	*/
126	ret = da9052_reg_update(tsi->da9052,
127	DA9052_EVENT_B_REG, 0xC0, 0xC0);
128	if (ret < 0)
129	return;
130
131	/* Mask TSI_READY event and unmask PEN_DOWN event */
8f520803 FE	132	da9052_disable_irq(tsi->da9052, DA9052_IRQ_TSIREADY);
8f520803 FE	133	da9052_enable_irq(tsi->da9052, DA9052_IRQ_PENDOWN);
eead75a2 AJ	134	}
	135	}
	136	}
	137
5298cc4c	138	static int da9052_ts_configure_gpio(struct da9052 *da9052)
eead75a2 AJ	139	{
	140	int error;
	141
	142	error = da9052_reg_update(da9052, DA9052_GPIO_2_3_REG, 0x30, 0);
	143	if (error < 0)
	144	return error;
	145
	146	error = da9052_reg_update(da9052, DA9052_GPIO_4_5_REG, 0x33, 0);
	147	if (error < 0)
	148	return error;
	149
	150	error = da9052_reg_update(da9052, DA9052_GPIO_6_7_REG, 0x33, 0);
	151	if (error < 0)
	152	return error;
	153
	154	return 0;
	155	}
	156
5298cc4c	157	static int da9052_configure_tsi(struct da9052_tsi *tsi)
eead75a2 AJ	158	{
	159	int error;
	160
	161	error = da9052_ts_configure_gpio(tsi->da9052);
	162	if (error)
	163	return error;
	164
	165	/* Measure TSI sample every 1ms */
	166	error = da9052_reg_update(tsi->da9052, DA9052_ADC_CONT_REG,
	167	1 << 6, 1 << 6);
	168	if (error < 0)
	169	return error;
	170
	171	/* TSI_DELAY: 3 slots, TSI_SKIP: 0 slots, TSI_MODE: XYZP */
	172	error = da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 0xFC, 0xC0);
	173	if (error < 0)
	174	return error;
	175
	176	/* Supply TSIRef through LD09 */
	177	error = da9052_reg_write(tsi->da9052, DA9052_LDO9_REG, 0x59);
	178	if (error < 0)
	179	return error;
	180
	181	return 0;
	182	}
	183
	184	static int da9052_ts_input_open(struct input_dev *input_dev)
	185	{
	186	struct da9052_tsi *tsi = input_get_drvdata(input_dev);
	187
	188	tsi->stopped = false;
	189	mb();
	190
	191	/* Unmask PEN_DOWN event */
8f520803	192	da9052_enable_irq(tsi->da9052, DA9052_IRQ_PENDOWN);
eead75a2 AJ	193
	194	/* Enable Pen Detect Circuit */
	195	return da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG,
	196	1 << 1, 1 << 1);
	197	}
	198
	199	static void da9052_ts_input_close(struct input_dev *input_dev)
	200	{
	201	struct da9052_tsi *tsi = input_get_drvdata(input_dev);
	202
	203	tsi->stopped = true;
	204	mb();
8f520803	205	da9052_disable_irq(tsi->da9052, DA9052_IRQ_PENDOWN);
eead75a2 AJ	206	cancel_delayed_work_sync(&tsi->ts_pen_work);
	207
	208	if (tsi->adc_on) {
8f520803	209	da9052_disable_irq(tsi->da9052, DA9052_IRQ_TSIREADY);
eead75a2 AJ	210	da9052_ts_adc_toggle(tsi, false);
	211
	212	/*
	213	* If ADC was on that means that pendwn IRQ was disabled
	214	* twice and we need to enable it to keep enable/disable
	215	* counter balanced. IRQ is still off though.
	216	*/
8f520803	217	da9052_enable_irq(tsi->da9052, DA9052_IRQ_PENDOWN);
eead75a2 AJ	218	}
	219
	220	/* Disable Pen Detect Circuit */
	221	da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 1 << 1, 0);
	222	}
	223
5298cc4c	224	static int da9052_ts_probe(struct platform_device *pdev)
eead75a2 AJ	225	{
	226	struct da9052 *da9052;
	227	struct da9052_tsi *tsi;
	228	struct input_dev *input_dev;
eead75a2 AJ	229	int error;
	230
	231	da9052 = dev_get_drvdata(pdev->dev.parent);
	232	if (!da9052)
	233	return -EINVAL;
	234
eead75a2 AJ	235	tsi = kzalloc(sizeof(struct da9052_tsi), GFP_KERNEL);
	236	input_dev = input_allocate_device();
	237	if (!tsi \|\| !input_dev) {
	238	error = -ENOMEM;
	239	goto err_free_mem;
	240	}
	241
	242	tsi->da9052 = da9052;
	243	tsi->dev = input_dev;
eead75a2 AJ	244	tsi->stopped = true;
	245	INIT_DELAYED_WORK(&tsi->ts_pen_work, da9052_ts_pen_work);
	246
	247	input_dev->id.version = 0x0101;
	248	input_dev->id.vendor = 0x15B6;
	249	input_dev->id.product = 0x9052;
	250	input_dev->name = "Dialog DA9052 TouchScreen Driver";
	251	input_dev->dev.parent = &pdev->dev;
	252	input_dev->open = da9052_ts_input_open;
	253	input_dev->close = da9052_ts_input_close;
	254
	255	__set_bit(EV_ABS, input_dev->evbit);
	256	__set_bit(EV_KEY, input_dev->evbit);
	257	__set_bit(BTN_TOUCH, input_dev->keybit);
	258
	259	input_set_abs_params(input_dev, ABS_X, 0, 1023, 0, 0);
	260	input_set_abs_params(input_dev, ABS_Y, 0, 1023, 0, 0);
	261	input_set_abs_params(input_dev, ABS_PRESSURE, 0, 1023, 0, 0);
	262
	263	input_set_drvdata(input_dev, tsi);
	264
	265	/* Disable Pen Detect Circuit */
	266	da9052_reg_update(tsi->da9052, DA9052_TSI_CONT_A_REG, 1 << 1, 0);
	267
	268	/* Disable ADC */
	269	da9052_ts_adc_toggle(tsi, false);
	270
8f520803 FE	271	error = da9052_request_irq(tsi->da9052, DA9052_IRQ_PENDOWN,
8f520803 FE	272	"pendown-irq", da9052_ts_pendwn_irq, tsi);
eead75a2 AJ	273	if (error) {
eead75a2 AJ	274	dev_err(tsi->da9052->dev,
8f520803	275	"Failed to register PENDWN IRQ: %d\n", error);
eead75a2 AJ	276	goto err_free_mem;
	277	}
	278
8f520803 FE	279	error = da9052_request_irq(tsi->da9052, DA9052_IRQ_TSIREADY,
8f520803 FE	280	"tsiready-irq", da9052_ts_datardy_irq, tsi);
eead75a2 AJ	281	if (error) {
eead75a2 AJ	282	dev_err(tsi->da9052->dev,
8f520803	283	"Failed to register TSIRDY IRQ :%d\n", error);
eead75a2 AJ	284	goto err_free_pendwn_irq;
	285	}
	286
	287	/* Mask PEN_DOWN and TSI_READY events */
8f520803 FE	288	da9052_disable_irq(tsi->da9052, DA9052_IRQ_PENDOWN);
8f520803 FE	289	da9052_disable_irq(tsi->da9052, DA9052_IRQ_TSIREADY);
eead75a2 AJ	290
	291	error = da9052_configure_tsi(tsi);
	292	if (error)
	293	goto err_free_datardy_irq;
	294
	295	error = input_register_device(tsi->dev);
	296	if (error)
	297	goto err_free_datardy_irq;
	298
	299	platform_set_drvdata(pdev, tsi);
	300
	301	return 0;
	302
	303	err_free_datardy_irq:
8f520803	304	da9052_free_irq(tsi->da9052, DA9052_IRQ_TSIREADY, tsi);
eead75a2	305	err_free_pendwn_irq:
8f520803	306	da9052_free_irq(tsi->da9052, DA9052_IRQ_PENDOWN, tsi);
eead75a2 AJ	307	err_free_mem:
	308	kfree(tsi);
	309	input_free_device(input_dev);
	310
	311	return error;
	312	}
	313
e2619cf7	314	static int da9052_ts_remove(struct platform_device *pdev)
eead75a2 AJ	315	{
	316	struct da9052_tsi *tsi = platform_get_drvdata(pdev);
	317
	318	da9052_reg_write(tsi->da9052, DA9052_LDO9_REG, 0x19);
	319
8f520803 FE	320	da9052_free_irq(tsi->da9052, DA9052_IRQ_TSIREADY, tsi);
8f520803 FE	321	da9052_free_irq(tsi->da9052, DA9052_IRQ_PENDOWN, tsi);
eead75a2 AJ	322
	323	input_unregister_device(tsi->dev);
	324	kfree(tsi);
	325
eead75a2 AJ	326	return 0;
	327	}
	328
	329	static struct platform_driver da9052_tsi_driver = {
	330	.probe = da9052_ts_probe,
1cb0aa88	331	.remove = da9052_ts_remove,
eead75a2 AJ	332	.driver = {
eead75a2 AJ	333	.name = "da9052-tsi",
eead75a2 AJ	334	},
	335	};
	336
	337	module_platform_driver(da9052_tsi_driver);
	338
	339	MODULE_DESCRIPTION("Touchscreen driver for Dialog Semiconductor DA9052");
	340	MODULE_AUTHOR("Anthony Olech <Anthony.Olech@diasemi.com>");
	341	MODULE_LICENSE("GPL");
	342	MODULE_ALIAS("platform:da9052-tsi");