2 * Core driver for TI TPS6586x PMIC family
4 * Copyright (c) 2010 CompuLab Ltd.
5 * Mike Rapoport <mike@compulab.co.il>
8 * Copyright (C) 2008 Compulab, Ltd.
9 * Mike Rapoport <mike@compulab.co.il>
10 * Copyright (C) 2006-2008 Marvell International Ltd.
11 * Eric Miao <eric.miao@marvell.com>
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
18 #include <linux/interrupt.h>
19 #include <linux/irq.h>
20 #include <linux/kernel.h>
21 #include <linux/module.h>
22 #include <linux/mutex.h>
23 #include <linux/slab.h>
24 #include <linux/err.h>
25 #include <linux/i2c.h>
26 #include <linux/regmap.h>
27 #include <linux/regulator/of_regulator.h>
28 #include <linux/regulator/machine.h>
30 #include <linux/mfd/core.h>
31 #include <linux/mfd/tps6586x.h>
33 /* interrupt control registers */
34 #define TPS6586X_INT_ACK1 0xb5
35 #define TPS6586X_INT_ACK2 0xb6
36 #define TPS6586X_INT_ACK3 0xb7
37 #define TPS6586X_INT_ACK4 0xb8
39 /* interrupt mask registers */
40 #define TPS6586X_INT_MASK1 0xb0
41 #define TPS6586X_INT_MASK2 0xb1
42 #define TPS6586X_INT_MASK3 0xb2
43 #define TPS6586X_INT_MASK4 0xb3
44 #define TPS6586X_INT_MASK5 0xb4
47 #define TPS6586X_VERSIONCRC 0xcd
49 /* Maximum register */
50 #define TPS6586X_MAX_REGISTER (TPS6586X_VERSIONCRC + 1)
52 struct tps6586x_irq_data {
57 #define TPS6586X_IRQ(_reg, _mask) \
59 .mask_reg = (_reg) - TPS6586X_INT_MASK1, \
60 .mask_mask = (_mask), \
63 static const struct tps6586x_irq_data tps6586x_irqs[] = {
64 [TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
65 [TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
66 [TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
67 [TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
68 [TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
69 [TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
70 [TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
71 [TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
72 [TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
73 [TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
74 [TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
75 [TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
76 [TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
77 [TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
78 [TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
79 [TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
80 [TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
81 [TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
82 [TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
83 [TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
84 [TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
85 [TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
86 [TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
87 [TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
88 [TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
89 [TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
90 [TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
93 static struct mfd_cell tps6586x_cell[] = {
95 .name = "tps6586x-gpio",
98 .name = "tps6586x-rtc",
101 .name = "tps6586x-onkey",
107 struct i2c_client *client;
108 struct regmap *regmap;
110 struct irq_chip irq_chip;
111 struct mutex irq_lock;
117 static inline struct tps6586x *dev_to_tps6586x(struct device *dev)
119 return i2c_get_clientdata(to_i2c_client(dev));
122 int tps6586x_write(struct device *dev, int reg, uint8_t val)
124 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
126 return regmap_write(tps6586x->regmap, reg, val);
128 EXPORT_SYMBOL_GPL(tps6586x_write);
130 int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val)
132 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
134 return regmap_bulk_write(tps6586x->regmap, reg, val, len);
136 EXPORT_SYMBOL_GPL(tps6586x_writes);
138 int tps6586x_read(struct device *dev, int reg, uint8_t *val)
140 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
144 ret = regmap_read(tps6586x->regmap, reg, &rval);
149 EXPORT_SYMBOL_GPL(tps6586x_read);
151 int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val)
153 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
155 return regmap_bulk_read(tps6586x->regmap, reg, val, len);
157 EXPORT_SYMBOL_GPL(tps6586x_reads);
159 int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
161 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
163 return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask);
165 EXPORT_SYMBOL_GPL(tps6586x_set_bits);
167 int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
169 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
171 return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0);
173 EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
175 int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
177 struct tps6586x *tps6586x = dev_to_tps6586x(dev);
179 return regmap_update_bits(tps6586x->regmap, reg, mask, val);
181 EXPORT_SYMBOL_GPL(tps6586x_update);
183 static int __remove_subdev(struct device *dev, void *unused)
185 platform_device_unregister(to_platform_device(dev));
189 static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
191 return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
194 static void tps6586x_irq_lock(struct irq_data *data)
196 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
198 mutex_lock(&tps6586x->irq_lock);
201 static void tps6586x_irq_enable(struct irq_data *irq_data)
203 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
204 unsigned int __irq = irq_data->irq - tps6586x->irq_base;
205 const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
207 tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
208 tps6586x->irq_en |= (1 << __irq);
211 static void tps6586x_irq_disable(struct irq_data *irq_data)
213 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
215 unsigned int __irq = irq_data->irq - tps6586x->irq_base;
216 const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
218 tps6586x->mask_reg[data->mask_reg] |= data->mask_mask;
219 tps6586x->irq_en &= ~(1 << __irq);
222 static void tps6586x_irq_sync_unlock(struct irq_data *data)
224 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
227 for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
229 ret = tps6586x_write(tps6586x->dev,
230 TPS6586X_INT_MASK1 + i,
231 tps6586x->mask_reg[i]);
235 mutex_unlock(&tps6586x->irq_lock);
238 static irqreturn_t tps6586x_irq(int irq, void *data)
240 struct tps6586x *tps6586x = data;
244 ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
245 sizeof(acks), (uint8_t *)&acks);
248 dev_err(tps6586x->dev, "failed to read interrupt status\n");
252 acks = le32_to_cpu(acks);
257 if (tps6586x->irq_en & (1 << i))
258 handle_nested_irq(tps6586x->irq_base + i);
266 static int __devinit tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
273 dev_warn(tps6586x->dev, "No interrupt support on IRQ base\n");
277 mutex_init(&tps6586x->irq_lock);
278 for (i = 0; i < 5; i++) {
279 tps6586x->mask_reg[i] = 0xff;
280 tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
283 tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
285 tps6586x->irq_base = irq_base;
287 tps6586x->irq_chip.name = "tps6586x";
288 tps6586x->irq_chip.irq_enable = tps6586x_irq_enable;
289 tps6586x->irq_chip.irq_disable = tps6586x_irq_disable;
290 tps6586x->irq_chip.irq_bus_lock = tps6586x_irq_lock;
291 tps6586x->irq_chip.irq_bus_sync_unlock = tps6586x_irq_sync_unlock;
293 for (i = 0; i < ARRAY_SIZE(tps6586x_irqs); i++) {
294 int __irq = i + tps6586x->irq_base;
295 irq_set_chip_data(__irq, tps6586x);
296 irq_set_chip_and_handler(__irq, &tps6586x->irq_chip,
298 irq_set_nested_thread(__irq, 1);
300 set_irq_flags(__irq, IRQF_VALID);
304 ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
305 "tps6586x", tps6586x);
308 device_init_wakeup(tps6586x->dev, 1);
309 enable_irq_wake(irq);
315 static int __devinit tps6586x_add_subdevs(struct tps6586x *tps6586x,
316 struct tps6586x_platform_data *pdata)
318 struct tps6586x_subdev_info *subdev;
319 struct platform_device *pdev;
322 for (i = 0; i < pdata->num_subdevs; i++) {
323 subdev = &pdata->subdevs[i];
325 pdev = platform_device_alloc(subdev->name, subdev->id);
331 pdev->dev.parent = tps6586x->dev;
332 pdev->dev.platform_data = subdev->platform_data;
333 pdev->dev.of_node = subdev->of_node;
335 ret = platform_device_add(pdev);
337 platform_device_put(pdev);
344 tps6586x_remove_subdevs(tps6586x);
349 static struct of_regulator_match tps6586x_matches[] = {
350 { .name = "sys", .driver_data = (void *)TPS6586X_ID_SYS },
351 { .name = "sm0", .driver_data = (void *)TPS6586X_ID_SM_0 },
352 { .name = "sm1", .driver_data = (void *)TPS6586X_ID_SM_1 },
353 { .name = "sm2", .driver_data = (void *)TPS6586X_ID_SM_2 },
354 { .name = "ldo0", .driver_data = (void *)TPS6586X_ID_LDO_0 },
355 { .name = "ldo1", .driver_data = (void *)TPS6586X_ID_LDO_1 },
356 { .name = "ldo2", .driver_data = (void *)TPS6586X_ID_LDO_2 },
357 { .name = "ldo3", .driver_data = (void *)TPS6586X_ID_LDO_3 },
358 { .name = "ldo4", .driver_data = (void *)TPS6586X_ID_LDO_4 },
359 { .name = "ldo5", .driver_data = (void *)TPS6586X_ID_LDO_5 },
360 { .name = "ldo6", .driver_data = (void *)TPS6586X_ID_LDO_6 },
361 { .name = "ldo7", .driver_data = (void *)TPS6586X_ID_LDO_7 },
362 { .name = "ldo8", .driver_data = (void *)TPS6586X_ID_LDO_8 },
363 { .name = "ldo9", .driver_data = (void *)TPS6586X_ID_LDO_9 },
364 { .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC },
367 static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
369 const unsigned int num = ARRAY_SIZE(tps6586x_matches);
370 struct device_node *np = client->dev.of_node;
371 struct tps6586x_platform_data *pdata;
372 struct tps6586x_subdev_info *devs;
373 struct device_node *regs;
374 const char *sys_rail_name = NULL;
379 regs = of_find_node_by_name(np, "regulators");
383 err = of_regulator_match(&client->dev, regs, tps6586x_matches, num);
392 devs = devm_kzalloc(&client->dev, count * sizeof(*devs), GFP_KERNEL);
396 for (i = 0, j = 0; i < num && j < count; i++) {
397 struct regulator_init_data *reg_idata;
399 if (!tps6586x_matches[i].init_data)
402 reg_idata = tps6586x_matches[i].init_data;
403 devs[j].name = "tps6586x-regulator";
404 devs[j].platform_data = tps6586x_matches[i].init_data;
405 devs[j].id = (int)tps6586x_matches[i].driver_data;
406 if (devs[j].id == TPS6586X_ID_SYS)
407 sys_rail_name = reg_idata->constraints.name;
409 if ((devs[j].id == TPS6586X_ID_LDO_5) ||
410 (devs[j].id == TPS6586X_ID_LDO_RTC))
411 reg_idata->supply_regulator = sys_rail_name;
413 devs[j].of_node = tps6586x_matches[i].of_node;
417 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
421 pdata->num_subdevs = count;
422 pdata->subdevs = devs;
423 pdata->gpio_base = -1;
424 pdata->irq_base = -1;
429 static struct of_device_id tps6586x_of_match[] = {
430 { .compatible = "ti,tps6586x", },
434 static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
440 static bool is_volatile_reg(struct device *dev, unsigned int reg)
442 /* Cache all interrupt mask register */
443 if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
449 static const struct regmap_config tps6586x_regmap_config = {
452 .max_register = TPS6586X_MAX_REGISTER - 1,
453 .volatile_reg = is_volatile_reg,
454 .cache_type = REGCACHE_RBTREE,
457 static int __devinit tps6586x_i2c_probe(struct i2c_client *client,
458 const struct i2c_device_id *id)
460 struct tps6586x_platform_data *pdata = client->dev.platform_data;
461 struct tps6586x *tps6586x;
464 if (!pdata && client->dev.of_node)
465 pdata = tps6586x_parse_dt(client);
468 dev_err(&client->dev, "tps6586x requires platform data\n");
472 ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
474 dev_err(&client->dev, "Chip ID read failed: %d\n", ret);
478 dev_info(&client->dev, "VERSIONCRC is %02x\n", ret);
480 tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
481 if (tps6586x == NULL) {
482 dev_err(&client->dev, "memory for tps6586x alloc failed\n");
486 tps6586x->client = client;
487 tps6586x->dev = &client->dev;
488 i2c_set_clientdata(client, tps6586x);
490 tps6586x->regmap = devm_regmap_init_i2c(client,
491 &tps6586x_regmap_config);
492 if (IS_ERR(tps6586x->regmap)) {
493 ret = PTR_ERR(tps6586x->regmap);
494 dev_err(&client->dev, "regmap init failed: %d\n", ret);
500 ret = tps6586x_irq_init(tps6586x, client->irq,
503 dev_err(&client->dev, "IRQ init failed: %d\n", ret);
508 ret = mfd_add_devices(tps6586x->dev, -1,
509 tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
512 dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
516 ret = tps6586x_add_subdevs(tps6586x, pdata);
518 dev_err(&client->dev, "add devices failed: %d\n", ret);
525 mfd_remove_devices(tps6586x->dev);
528 free_irq(client->irq, tps6586x);
532 static int __devexit tps6586x_i2c_remove(struct i2c_client *client)
534 struct tps6586x *tps6586x = i2c_get_clientdata(client);
536 tps6586x_remove_subdevs(tps6586x);
537 mfd_remove_devices(tps6586x->dev);
539 free_irq(client->irq, tps6586x);
543 static const struct i2c_device_id tps6586x_id_table[] = {
547 MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
549 static struct i2c_driver tps6586x_driver = {
552 .owner = THIS_MODULE,
553 .of_match_table = of_match_ptr(tps6586x_of_match),
555 .probe = tps6586x_i2c_probe,
556 .remove = __devexit_p(tps6586x_i2c_remove),
557 .id_table = tps6586x_id_table,
560 static int __init tps6586x_init(void)
562 return i2c_add_driver(&tps6586x_driver);
564 subsys_initcall(tps6586x_init);
566 static void __exit tps6586x_exit(void)
568 i2c_del_driver(&tps6586x_driver);
570 module_exit(tps6586x_exit);
572 MODULE_DESCRIPTION("TPS6586X core driver");
573 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
574 MODULE_LICENSE("GPL");