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v5.9
 
  1/*
  2 * tps65217.c
  3 *
  4 * TPS65217 chip family multi-function driver
  5 *
  6 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
  7 *
  8 * This program is free software; you can redistribute it and/or
  9 * modify it under the terms of the GNU General Public License as
 10 * published by the Free Software Foundation version 2.
 11 *
 12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 13 * kind, whether express or implied; without even the implied warranty
 14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15 * GNU General Public License for more details.
 16 */
 17
 18#include <linux/device.h>
 19#include <linux/err.h>
 20#include <linux/init.h>
 21#include <linux/interrupt.h>
 22#include <linux/i2c.h>
 23#include <linux/irq.h>
 24#include <linux/irqdomain.h>
 25#include <linux/kernel.h>
 26#include <linux/module.h>
 27#include <linux/of.h>
 28#include <linux/of_device.h>
 29#include <linux/platform_device.h>
 30#include <linux/regmap.h>
 31#include <linux/slab.h>
 32
 33#include <linux/mfd/core.h>
 34#include <linux/mfd/tps65217.h>
 35
 36static struct resource charger_resources[] = {
 37	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_AC, "AC"),
 38	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_USB, "USB"),
 39};
 40
 41static struct resource pb_resources[] = {
 42	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_PB, "PB"),
 43};
 44
 45static void tps65217_irq_lock(struct irq_data *data)
 46{
 47	struct tps65217 *tps = irq_data_get_irq_chip_data(data);
 48
 49	mutex_lock(&tps->irq_lock);
 50}
 51
 52static void tps65217_irq_sync_unlock(struct irq_data *data)
 53{
 54	struct tps65217 *tps = irq_data_get_irq_chip_data(data);
 55	int ret;
 56
 57	ret = tps65217_set_bits(tps, TPS65217_REG_INT, TPS65217_INT_MASK,
 58				tps->irq_mask, TPS65217_PROTECT_NONE);
 59	if (ret != 0)
 60		dev_err(tps->dev, "Failed to sync IRQ masks\n");
 61
 62	mutex_unlock(&tps->irq_lock);
 63}
 64
 65static void tps65217_irq_enable(struct irq_data *data)
 66{
 67	struct tps65217 *tps = irq_data_get_irq_chip_data(data);
 68	u8 mask = BIT(data->hwirq) << TPS65217_INT_SHIFT;
 69
 70	tps->irq_mask &= ~mask;
 71}
 72
 73static void tps65217_irq_disable(struct irq_data *data)
 74{
 75	struct tps65217 *tps = irq_data_get_irq_chip_data(data);
 76	u8 mask = BIT(data->hwirq) << TPS65217_INT_SHIFT;
 77
 78	tps->irq_mask |= mask;
 79}
 80
 81static struct irq_chip tps65217_irq_chip = {
 82	.name			= "tps65217",
 83	.irq_bus_lock		= tps65217_irq_lock,
 84	.irq_bus_sync_unlock	= tps65217_irq_sync_unlock,
 85	.irq_enable		= tps65217_irq_enable,
 86	.irq_disable		= tps65217_irq_disable,
 87};
 88
 89static struct mfd_cell tps65217s[] = {
 90	{
 91		.name = "tps65217-pmic",
 92		.of_compatible = "ti,tps65217-pmic",
 93	},
 94	{
 95		.name = "tps65217-bl",
 96		.of_compatible = "ti,tps65217-bl",
 97	},
 98	{
 99		.name = "tps65217-charger",
100		.num_resources = ARRAY_SIZE(charger_resources),
101		.resources = charger_resources,
102		.of_compatible = "ti,tps65217-charger",
103	},
104	{
105		.name = "tps65217-pwrbutton",
106		.num_resources = ARRAY_SIZE(pb_resources),
107		.resources = pb_resources,
108		.of_compatible = "ti,tps65217-pwrbutton",
109	},
110};
111
112static irqreturn_t tps65217_irq_thread(int irq, void *data)
113{
114	struct tps65217 *tps = data;
115	unsigned int status;
116	bool handled = false;
117	int i;
118	int ret;
119
120	ret = tps65217_reg_read(tps, TPS65217_REG_INT, &status);
121	if (ret < 0) {
122		dev_err(tps->dev, "Failed to read IRQ status: %d\n",
123			ret);
124		return IRQ_NONE;
125	}
126
127	for (i = 0; i < TPS65217_NUM_IRQ; i++) {
128		if (status & BIT(i)) {
129			handle_nested_irq(irq_find_mapping(tps->irq_domain, i));
130			handled = true;
131		}
132	}
133
134	if (handled)
135		return IRQ_HANDLED;
136
137	return IRQ_NONE;
138}
139
140static int tps65217_irq_map(struct irq_domain *h, unsigned int virq,
141			irq_hw_number_t hw)
142{
143	struct tps65217 *tps = h->host_data;
144
145	irq_set_chip_data(virq, tps);
146	irq_set_chip_and_handler(virq, &tps65217_irq_chip, handle_edge_irq);
147	irq_set_nested_thread(virq, 1);
148	irq_set_parent(virq, tps->irq);
149	irq_set_noprobe(virq);
150
151	return 0;
152}
153
154static const struct irq_domain_ops tps65217_irq_domain_ops = {
155	.map = tps65217_irq_map,
156};
157
158static int tps65217_irq_init(struct tps65217 *tps, int irq)
159{
160	int ret;
161
162	mutex_init(&tps->irq_lock);
163	tps->irq = irq;
164
165	/* Mask all interrupt sources */
166	tps->irq_mask = TPS65217_INT_MASK;
167	tps65217_set_bits(tps, TPS65217_REG_INT, TPS65217_INT_MASK,
168			  TPS65217_INT_MASK, TPS65217_PROTECT_NONE);
169
170	tps->irq_domain = irq_domain_add_linear(tps->dev->of_node,
171		TPS65217_NUM_IRQ, &tps65217_irq_domain_ops, tps);
172	if (!tps->irq_domain) {
173		dev_err(tps->dev, "Could not create IRQ domain\n");
174		return -ENOMEM;
175	}
176
177	ret = devm_request_threaded_irq(tps->dev, irq, NULL,
178					tps65217_irq_thread, IRQF_ONESHOT,
179					"tps65217-irq", tps);
180	if (ret) {
181		dev_err(tps->dev, "Failed to request IRQ %d: %d\n",
182			irq, ret);
183		return ret;
184	}
185
186	enable_irq_wake(irq);
187
188	return 0;
189}
190
191/**
192 * tps65217_reg_read: Read a single tps65217 register.
193 *
194 * @tps: Device to read from.
195 * @reg: Register to read.
196 * @val: Contians the value
197 */
198int tps65217_reg_read(struct tps65217 *tps, unsigned int reg,
199			unsigned int *val)
200{
201	return regmap_read(tps->regmap, reg, val);
202}
203EXPORT_SYMBOL_GPL(tps65217_reg_read);
204
205/**
206 * tps65217_reg_write: Write a single tps65217 register.
207 *
208 * @tps: Device to write to.
209 * @reg: Register to write to.
210 * @val: Value to write.
211 * @level: Password protected level
212 */
213int tps65217_reg_write(struct tps65217 *tps, unsigned int reg,
214			unsigned int val, unsigned int level)
215{
216	int ret;
217	unsigned int xor_reg_val;
218
219	switch (level) {
220	case TPS65217_PROTECT_NONE:
221		return regmap_write(tps->regmap, reg, val);
222	case TPS65217_PROTECT_L1:
223		xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
224		ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
225							xor_reg_val);
226		if (ret < 0)
227			return ret;
228
229		return regmap_write(tps->regmap, reg, val);
230	case TPS65217_PROTECT_L2:
231		xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
232		ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
233							xor_reg_val);
234		if (ret < 0)
235			return ret;
236		ret = regmap_write(tps->regmap, reg, val);
237		if (ret < 0)
238			return ret;
239		ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
240							xor_reg_val);
241		if (ret < 0)
242			return ret;
243		return regmap_write(tps->regmap, reg, val);
244	default:
245		return -EINVAL;
246	}
247}
248EXPORT_SYMBOL_GPL(tps65217_reg_write);
249
250/**
251 * tps65217_update_bits: Modify bits w.r.t mask, val and level.
252 *
253 * @tps: Device to write to.
254 * @reg: Register to read-write to.
255 * @mask: Mask.
256 * @val: Value to write.
257 * @level: Password protected level
258 */
259static int tps65217_update_bits(struct tps65217 *tps, unsigned int reg,
260		unsigned int mask, unsigned int val, unsigned int level)
261{
262	int ret;
263	unsigned int data;
264
265	ret = tps65217_reg_read(tps, reg, &data);
266	if (ret) {
267		dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
268		return ret;
269	}
270
271	data &= ~mask;
272	data |= val & mask;
273
274	ret = tps65217_reg_write(tps, reg, data, level);
275	if (ret)
276		dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
277
278	return ret;
279}
280
281int tps65217_set_bits(struct tps65217 *tps, unsigned int reg,
282		unsigned int mask, unsigned int val, unsigned int level)
283{
284	return tps65217_update_bits(tps, reg, mask, val, level);
285}
286EXPORT_SYMBOL_GPL(tps65217_set_bits);
287
288int tps65217_clear_bits(struct tps65217 *tps, unsigned int reg,
289		unsigned int mask, unsigned int level)
290{
291	return tps65217_update_bits(tps, reg, mask, 0, level);
292}
293EXPORT_SYMBOL_GPL(tps65217_clear_bits);
294
295static bool tps65217_volatile_reg(struct device *dev, unsigned int reg)
296{
297	switch (reg) {
298	case TPS65217_REG_INT:
299		return true;
300	default:
301		return false;
302	}
303}
304
305static const struct regmap_config tps65217_regmap_config = {
306	.reg_bits = 8,
307	.val_bits = 8,
308
309	.max_register = TPS65217_REG_MAX,
310	.volatile_reg = tps65217_volatile_reg,
311};
312
313static const struct of_device_id tps65217_of_match[] = {
314	{ .compatible = "ti,tps65217"},
315	{ /* sentinel */ },
316};
317MODULE_DEVICE_TABLE(of, tps65217_of_match);
318
319static int tps65217_probe(struct i2c_client *client)
320{
321	struct tps65217 *tps;
322	unsigned int version;
323	bool status_off = false;
324	int ret;
325
326	status_off = of_property_read_bool(client->dev.of_node,
327					   "ti,pmic-shutdown-controller");
328
329	tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
330	if (!tps)
331		return -ENOMEM;
332
333	i2c_set_clientdata(client, tps);
334	tps->dev = &client->dev;
335
336	tps->regmap = devm_regmap_init_i2c(client, &tps65217_regmap_config);
337	if (IS_ERR(tps->regmap)) {
338		ret = PTR_ERR(tps->regmap);
339		dev_err(tps->dev, "Failed to allocate register map: %d\n",
340			ret);
341		return ret;
342	}
343
344	if (client->irq) {
345		tps65217_irq_init(tps, client->irq);
346	} else {
347		int i;
348
349		/* Don't tell children about IRQ resources which won't fire */
350		for (i = 0; i < ARRAY_SIZE(tps65217s); i++)
351			tps65217s[i].num_resources = 0;
352	}
353
354	ret = devm_mfd_add_devices(tps->dev, -1, tps65217s,
355				   ARRAY_SIZE(tps65217s), NULL, 0,
356				   tps->irq_domain);
357	if (ret < 0) {
358		dev_err(tps->dev, "mfd_add_devices failed: %d\n", ret);
359		return ret;
360	}
361
362	ret = tps65217_reg_read(tps, TPS65217_REG_CHIPID, &version);
363	if (ret < 0) {
364		dev_err(tps->dev, "Failed to read revision register: %d\n",
365			ret);
366		return ret;
367	}
368
369	/* Set the PMIC to shutdown on PWR_EN toggle */
370	if (status_off) {
371		ret = tps65217_set_bits(tps, TPS65217_REG_STATUS,
372				TPS65217_STATUS_OFF, TPS65217_STATUS_OFF,
373				TPS65217_PROTECT_NONE);
374		if (ret)
375			dev_warn(tps->dev, "unable to set the status OFF\n");
376	}
377
378	dev_info(tps->dev, "TPS65217 ID %#x version 1.%d\n",
379			(version & TPS65217_CHIPID_CHIP_MASK) >> 4,
380			version & TPS65217_CHIPID_REV_MASK);
381
382	return 0;
383}
384
385static int tps65217_remove(struct i2c_client *client)
386{
387	struct tps65217 *tps = i2c_get_clientdata(client);
388	unsigned int virq;
389	int i;
390
391	for (i = 0; i < TPS65217_NUM_IRQ; i++) {
392		virq = irq_find_mapping(tps->irq_domain, i);
393		if (virq)
394			irq_dispose_mapping(virq);
395	}
396
397	irq_domain_remove(tps->irq_domain);
398	tps->irq_domain = NULL;
399
400	return 0;
401}
402
403static const struct i2c_device_id tps65217_id_table[] = {
404	{"tps65217", TPS65217},
405	{ /* sentinel */ }
406};
407MODULE_DEVICE_TABLE(i2c, tps65217_id_table);
408
409static struct i2c_driver tps65217_driver = {
410	.driver		= {
411		.name	= "tps65217",
412		.of_match_table = tps65217_of_match,
413	},
414	.id_table	= tps65217_id_table,
415	.probe_new	= tps65217_probe,
416	.remove		= tps65217_remove,
417};
418
419static int __init tps65217_init(void)
420{
421	return i2c_add_driver(&tps65217_driver);
422}
423subsys_initcall(tps65217_init);
424
425static void __exit tps65217_exit(void)
426{
427	i2c_del_driver(&tps65217_driver);
428}
429module_exit(tps65217_exit);
430
431MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
432MODULE_DESCRIPTION("TPS65217 chip family multi-function driver");
433MODULE_LICENSE("GPL v2");
v6.2
  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * tps65217.c
  4 *
  5 * TPS65217 chip family multi-function driver
  6 *
  7 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
 
 
 
 
 
 
 
 
 
  8 */
  9
 10#include <linux/device.h>
 11#include <linux/err.h>
 12#include <linux/init.h>
 13#include <linux/interrupt.h>
 14#include <linux/i2c.h>
 15#include <linux/irq.h>
 16#include <linux/irqdomain.h>
 17#include <linux/kernel.h>
 18#include <linux/module.h>
 19#include <linux/of.h>
 20#include <linux/of_device.h>
 21#include <linux/platform_device.h>
 22#include <linux/regmap.h>
 23#include <linux/slab.h>
 24
 25#include <linux/mfd/core.h>
 26#include <linux/mfd/tps65217.h>
 27
 28static const struct resource charger_resources[] = {
 29	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_AC, "AC"),
 30	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_USB, "USB"),
 31};
 32
 33static const struct resource pb_resources[] = {
 34	DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_PB, "PB"),
 35};
 36
 37static void tps65217_irq_lock(struct irq_data *data)
 38{
 39	struct tps65217 *tps = irq_data_get_irq_chip_data(data);
 40
 41	mutex_lock(&tps->irq_lock);
 42}
 43
 44static void tps65217_irq_sync_unlock(struct irq_data *data)
 45{
 46	struct tps65217 *tps = irq_data_get_irq_chip_data(data);
 47	int ret;
 48
 49	ret = tps65217_set_bits(tps, TPS65217_REG_INT, TPS65217_INT_MASK,
 50				tps->irq_mask, TPS65217_PROTECT_NONE);
 51	if (ret != 0)
 52		dev_err(tps->dev, "Failed to sync IRQ masks\n");
 53
 54	mutex_unlock(&tps->irq_lock);
 55}
 56
 57static void tps65217_irq_enable(struct irq_data *data)
 58{
 59	struct tps65217 *tps = irq_data_get_irq_chip_data(data);
 60	u8 mask = BIT(data->hwirq) << TPS65217_INT_SHIFT;
 61
 62	tps->irq_mask &= ~mask;
 63}
 64
 65static void tps65217_irq_disable(struct irq_data *data)
 66{
 67	struct tps65217 *tps = irq_data_get_irq_chip_data(data);
 68	u8 mask = BIT(data->hwirq) << TPS65217_INT_SHIFT;
 69
 70	tps->irq_mask |= mask;
 71}
 72
 73static struct irq_chip tps65217_irq_chip = {
 74	.name			= "tps65217",
 75	.irq_bus_lock		= tps65217_irq_lock,
 76	.irq_bus_sync_unlock	= tps65217_irq_sync_unlock,
 77	.irq_enable		= tps65217_irq_enable,
 78	.irq_disable		= tps65217_irq_disable,
 79};
 80
 81static struct mfd_cell tps65217s[] = {
 82	{
 83		.name = "tps65217-pmic",
 84		.of_compatible = "ti,tps65217-pmic",
 85	},
 86	{
 87		.name = "tps65217-bl",
 88		.of_compatible = "ti,tps65217-bl",
 89	},
 90	{
 91		.name = "tps65217-charger",
 92		.num_resources = ARRAY_SIZE(charger_resources),
 93		.resources = charger_resources,
 94		.of_compatible = "ti,tps65217-charger",
 95	},
 96	{
 97		.name = "tps65217-pwrbutton",
 98		.num_resources = ARRAY_SIZE(pb_resources),
 99		.resources = pb_resources,
100		.of_compatible = "ti,tps65217-pwrbutton",
101	},
102};
103
104static irqreturn_t tps65217_irq_thread(int irq, void *data)
105{
106	struct tps65217 *tps = data;
107	unsigned int status;
108	bool handled = false;
109	int i;
110	int ret;
111
112	ret = tps65217_reg_read(tps, TPS65217_REG_INT, &status);
113	if (ret < 0) {
114		dev_err(tps->dev, "Failed to read IRQ status: %d\n",
115			ret);
116		return IRQ_NONE;
117	}
118
119	for (i = 0; i < TPS65217_NUM_IRQ; i++) {
120		if (status & BIT(i)) {
121			handle_nested_irq(irq_find_mapping(tps->irq_domain, i));
122			handled = true;
123		}
124	}
125
126	if (handled)
127		return IRQ_HANDLED;
128
129	return IRQ_NONE;
130}
131
132static int tps65217_irq_map(struct irq_domain *h, unsigned int virq,
133			irq_hw_number_t hw)
134{
135	struct tps65217 *tps = h->host_data;
136
137	irq_set_chip_data(virq, tps);
138	irq_set_chip_and_handler(virq, &tps65217_irq_chip, handle_edge_irq);
139	irq_set_nested_thread(virq, 1);
140	irq_set_parent(virq, tps->irq);
141	irq_set_noprobe(virq);
142
143	return 0;
144}
145
146static const struct irq_domain_ops tps65217_irq_domain_ops = {
147	.map = tps65217_irq_map,
148};
149
150static int tps65217_irq_init(struct tps65217 *tps, int irq)
151{
152	int ret;
153
154	mutex_init(&tps->irq_lock);
155	tps->irq = irq;
156
157	/* Mask all interrupt sources */
158	tps->irq_mask = TPS65217_INT_MASK;
159	tps65217_set_bits(tps, TPS65217_REG_INT, TPS65217_INT_MASK,
160			  TPS65217_INT_MASK, TPS65217_PROTECT_NONE);
161
162	tps->irq_domain = irq_domain_add_linear(tps->dev->of_node,
163		TPS65217_NUM_IRQ, &tps65217_irq_domain_ops, tps);
164	if (!tps->irq_domain) {
165		dev_err(tps->dev, "Could not create IRQ domain\n");
166		return -ENOMEM;
167	}
168
169	ret = devm_request_threaded_irq(tps->dev, irq, NULL,
170					tps65217_irq_thread, IRQF_ONESHOT,
171					"tps65217-irq", tps);
172	if (ret) {
173		dev_err(tps->dev, "Failed to request IRQ %d: %d\n",
174			irq, ret);
175		return ret;
176	}
177
178	enable_irq_wake(irq);
179
180	return 0;
181}
182
183/**
184 * tps65217_reg_read: Read a single tps65217 register.
185 *
186 * @tps: Device to read from.
187 * @reg: Register to read.
188 * @val: Contians the value
189 */
190int tps65217_reg_read(struct tps65217 *tps, unsigned int reg,
191			unsigned int *val)
192{
193	return regmap_read(tps->regmap, reg, val);
194}
195EXPORT_SYMBOL_GPL(tps65217_reg_read);
196
197/**
198 * tps65217_reg_write: Write a single tps65217 register.
199 *
200 * @tps: Device to write to.
201 * @reg: Register to write to.
202 * @val: Value to write.
203 * @level: Password protected level
204 */
205int tps65217_reg_write(struct tps65217 *tps, unsigned int reg,
206			unsigned int val, unsigned int level)
207{
208	int ret;
209	unsigned int xor_reg_val;
210
211	switch (level) {
212	case TPS65217_PROTECT_NONE:
213		return regmap_write(tps->regmap, reg, val);
214	case TPS65217_PROTECT_L1:
215		xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
216		ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
217							xor_reg_val);
218		if (ret < 0)
219			return ret;
220
221		return regmap_write(tps->regmap, reg, val);
222	case TPS65217_PROTECT_L2:
223		xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
224		ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
225							xor_reg_val);
226		if (ret < 0)
227			return ret;
228		ret = regmap_write(tps->regmap, reg, val);
229		if (ret < 0)
230			return ret;
231		ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
232							xor_reg_val);
233		if (ret < 0)
234			return ret;
235		return regmap_write(tps->regmap, reg, val);
236	default:
237		return -EINVAL;
238	}
239}
240EXPORT_SYMBOL_GPL(tps65217_reg_write);
241
242/**
243 * tps65217_update_bits: Modify bits w.r.t mask, val and level.
244 *
245 * @tps: Device to write to.
246 * @reg: Register to read-write to.
247 * @mask: Mask.
248 * @val: Value to write.
249 * @level: Password protected level
250 */
251static int tps65217_update_bits(struct tps65217 *tps, unsigned int reg,
252		unsigned int mask, unsigned int val, unsigned int level)
253{
254	int ret;
255	unsigned int data;
256
257	ret = tps65217_reg_read(tps, reg, &data);
258	if (ret) {
259		dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
260		return ret;
261	}
262
263	data &= ~mask;
264	data |= val & mask;
265
266	ret = tps65217_reg_write(tps, reg, data, level);
267	if (ret)
268		dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
269
270	return ret;
271}
272
273int tps65217_set_bits(struct tps65217 *tps, unsigned int reg,
274		unsigned int mask, unsigned int val, unsigned int level)
275{
276	return tps65217_update_bits(tps, reg, mask, val, level);
277}
278EXPORT_SYMBOL_GPL(tps65217_set_bits);
279
280int tps65217_clear_bits(struct tps65217 *tps, unsigned int reg,
281		unsigned int mask, unsigned int level)
282{
283	return tps65217_update_bits(tps, reg, mask, 0, level);
284}
285EXPORT_SYMBOL_GPL(tps65217_clear_bits);
286
287static bool tps65217_volatile_reg(struct device *dev, unsigned int reg)
288{
289	switch (reg) {
290	case TPS65217_REG_INT:
291		return true;
292	default:
293		return false;
294	}
295}
296
297static const struct regmap_config tps65217_regmap_config = {
298	.reg_bits = 8,
299	.val_bits = 8,
300
301	.max_register = TPS65217_REG_MAX,
302	.volatile_reg = tps65217_volatile_reg,
303};
304
305static const struct of_device_id tps65217_of_match[] = {
306	{ .compatible = "ti,tps65217"},
307	{ /* sentinel */ },
308};
309MODULE_DEVICE_TABLE(of, tps65217_of_match);
310
311static int tps65217_probe(struct i2c_client *client)
312{
313	struct tps65217 *tps;
314	unsigned int version;
315	bool status_off = false;
316	int ret;
317
318	status_off = of_property_read_bool(client->dev.of_node,
319					   "ti,pmic-shutdown-controller");
320
321	tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
322	if (!tps)
323		return -ENOMEM;
324
325	i2c_set_clientdata(client, tps);
326	tps->dev = &client->dev;
327
328	tps->regmap = devm_regmap_init_i2c(client, &tps65217_regmap_config);
329	if (IS_ERR(tps->regmap)) {
330		ret = PTR_ERR(tps->regmap);
331		dev_err(tps->dev, "Failed to allocate register map: %d\n",
332			ret);
333		return ret;
334	}
335
336	if (client->irq) {
337		tps65217_irq_init(tps, client->irq);
338	} else {
339		int i;
340
341		/* Don't tell children about IRQ resources which won't fire */
342		for (i = 0; i < ARRAY_SIZE(tps65217s); i++)
343			tps65217s[i].num_resources = 0;
344	}
345
346	ret = devm_mfd_add_devices(tps->dev, -1, tps65217s,
347				   ARRAY_SIZE(tps65217s), NULL, 0,
348				   tps->irq_domain);
349	if (ret < 0) {
350		dev_err(tps->dev, "mfd_add_devices failed: %d\n", ret);
351		return ret;
352	}
353
354	ret = tps65217_reg_read(tps, TPS65217_REG_CHIPID, &version);
355	if (ret < 0) {
356		dev_err(tps->dev, "Failed to read revision register: %d\n",
357			ret);
358		return ret;
359	}
360
361	/* Set the PMIC to shutdown on PWR_EN toggle */
362	if (status_off) {
363		ret = tps65217_set_bits(tps, TPS65217_REG_STATUS,
364				TPS65217_STATUS_OFF, TPS65217_STATUS_OFF,
365				TPS65217_PROTECT_NONE);
366		if (ret)
367			dev_warn(tps->dev, "unable to set the status OFF\n");
368	}
369
370	dev_info(tps->dev, "TPS65217 ID %#x version 1.%d\n",
371			(version & TPS65217_CHIPID_CHIP_MASK) >> 4,
372			version & TPS65217_CHIPID_REV_MASK);
373
374	return 0;
375}
376
377static void tps65217_remove(struct i2c_client *client)
378{
379	struct tps65217 *tps = i2c_get_clientdata(client);
380	unsigned int virq;
381	int i;
382
383	for (i = 0; i < TPS65217_NUM_IRQ; i++) {
384		virq = irq_find_mapping(tps->irq_domain, i);
385		if (virq)
386			irq_dispose_mapping(virq);
387	}
388
389	irq_domain_remove(tps->irq_domain);
390	tps->irq_domain = NULL;
 
 
391}
392
393static const struct i2c_device_id tps65217_id_table[] = {
394	{"tps65217", TPS65217},
395	{ /* sentinel */ }
396};
397MODULE_DEVICE_TABLE(i2c, tps65217_id_table);
398
399static struct i2c_driver tps65217_driver = {
400	.driver		= {
401		.name	= "tps65217",
402		.of_match_table = tps65217_of_match,
403	},
404	.id_table	= tps65217_id_table,
405	.probe_new	= tps65217_probe,
406	.remove		= tps65217_remove,
407};
408
409static int __init tps65217_init(void)
410{
411	return i2c_add_driver(&tps65217_driver);
412}
413subsys_initcall(tps65217_init);
414
415static void __exit tps65217_exit(void)
416{
417	i2c_del_driver(&tps65217_driver);
418}
419module_exit(tps65217_exit);
420
421MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
422MODULE_DESCRIPTION("TPS65217 chip family multi-function driver");
423MODULE_LICENSE("GPL v2");