1 // SPDX-License-Identifier: GPL-2.0-only
5 * TPS65217 chip family multi-function driver
7 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
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>
20 #include <linux/of_device.h>
21 #include <linux/platform_device.h>
22 #include <linux/regmap.h>
23 #include <linux/slab.h>
25 #include <linux/mfd/core.h>
26 #include <linux/mfd/tps65217.h>
28 static const struct resource charger_resources[] = {
29 DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_AC, "AC"),
30 DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_USB, "USB"),
33 static const struct resource pb_resources[] = {
34 DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_PB, "PB"),
37 static void tps65217_irq_lock(struct irq_data *data)
39 struct tps65217 *tps = irq_data_get_irq_chip_data(data);
41 mutex_lock(&tps->irq_lock);
44 static void tps65217_irq_sync_unlock(struct irq_data *data)
46 struct tps65217 *tps = irq_data_get_irq_chip_data(data);
49 ret = tps65217_set_bits(tps, TPS65217_REG_INT, TPS65217_INT_MASK,
50 tps->irq_mask, TPS65217_PROTECT_NONE);
52 dev_err(tps->dev, "Failed to sync IRQ masks\n");
54 mutex_unlock(&tps->irq_lock);
57 static void tps65217_irq_enable(struct irq_data *data)
59 struct tps65217 *tps = irq_data_get_irq_chip_data(data);
60 u8 mask = BIT(data->hwirq) << TPS65217_INT_SHIFT;
62 tps->irq_mask &= ~mask;
65 static void tps65217_irq_disable(struct irq_data *data)
67 struct tps65217 *tps = irq_data_get_irq_chip_data(data);
68 u8 mask = BIT(data->hwirq) << TPS65217_INT_SHIFT;
70 tps->irq_mask |= mask;
73 static struct irq_chip tps65217_irq_chip = {
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,
81 static struct mfd_cell tps65217s[] = {
83 .name = "tps65217-pmic",
84 .of_compatible = "ti,tps65217-pmic",
87 .name = "tps65217-bl",
88 .of_compatible = "ti,tps65217-bl",
91 .name = "tps65217-charger",
92 .num_resources = ARRAY_SIZE(charger_resources),
93 .resources = charger_resources,
94 .of_compatible = "ti,tps65217-charger",
97 .name = "tps65217-pwrbutton",
98 .num_resources = ARRAY_SIZE(pb_resources),
99 .resources = pb_resources,
100 .of_compatible = "ti,tps65217-pwrbutton",
104 static irqreturn_t tps65217_irq_thread(int irq, void *data)
106 struct tps65217 *tps = data;
108 bool handled = false;
112 ret = tps65217_reg_read(tps, TPS65217_REG_INT, &status);
114 dev_err(tps->dev, "Failed to read IRQ status: %d\n",
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));
132 static int tps65217_irq_map(struct irq_domain *h, unsigned int virq,
135 struct tps65217 *tps = h->host_data;
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);
146 static const struct irq_domain_ops tps65217_irq_domain_ops = {
147 .map = tps65217_irq_map,
150 static int tps65217_irq_init(struct tps65217 *tps, int irq)
154 mutex_init(&tps->irq_lock);
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);
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");
169 ret = devm_request_threaded_irq(tps->dev, irq, NULL,
170 tps65217_irq_thread, IRQF_ONESHOT,
171 "tps65217-irq", tps);
173 dev_err(tps->dev, "Failed to request IRQ %d: %d\n",
178 enable_irq_wake(irq);
184 * tps65217_reg_read: Read a single tps65217 register.
186 * @tps: Device to read from.
187 * @reg: Register to read.
188 * @val: Contians the value
190 int tps65217_reg_read(struct tps65217 *tps, unsigned int reg,
193 return regmap_read(tps->regmap, reg, val);
195 EXPORT_SYMBOL_GPL(tps65217_reg_read);
198 * tps65217_reg_write: Write a single tps65217 register.
200 * @tps: Device to write to.
201 * @reg: Register to write to.
202 * @val: Value to write.
203 * @level: Password protected level
205 int tps65217_reg_write(struct tps65217 *tps, unsigned int reg,
206 unsigned int val, unsigned int level)
209 unsigned int xor_reg_val;
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,
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,
228 ret = regmap_write(tps->regmap, reg, val);
231 ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
235 return regmap_write(tps->regmap, reg, val);
240 EXPORT_SYMBOL_GPL(tps65217_reg_write);
243 * tps65217_update_bits: Modify bits w.r.t mask, val and level.
245 * @tps: Device to write to.
246 * @reg: Register to read-write to.
248 * @val: Value to write.
249 * @level: Password protected level
251 static int tps65217_update_bits(struct tps65217 *tps, unsigned int reg,
252 unsigned int mask, unsigned int val, unsigned int level)
257 ret = tps65217_reg_read(tps, reg, &data);
259 dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
266 ret = tps65217_reg_write(tps, reg, data, level);
268 dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
273 int tps65217_set_bits(struct tps65217 *tps, unsigned int reg,
274 unsigned int mask, unsigned int val, unsigned int level)
276 return tps65217_update_bits(tps, reg, mask, val, level);
278 EXPORT_SYMBOL_GPL(tps65217_set_bits);
280 int tps65217_clear_bits(struct tps65217 *tps, unsigned int reg,
281 unsigned int mask, unsigned int level)
283 return tps65217_update_bits(tps, reg, mask, 0, level);
285 EXPORT_SYMBOL_GPL(tps65217_clear_bits);
287 static bool tps65217_volatile_reg(struct device *dev, unsigned int reg)
290 case TPS65217_REG_INT:
297 static const struct regmap_config tps65217_regmap_config = {
301 .max_register = TPS65217_REG_MAX,
302 .volatile_reg = tps65217_volatile_reg,
305 static const struct of_device_id tps65217_of_match[] = {
306 { .compatible = "ti,tps65217"},
309 MODULE_DEVICE_TABLE(of, tps65217_of_match);
311 static int tps65217_probe(struct i2c_client *client)
313 struct tps65217 *tps;
314 unsigned int version;
315 bool status_off = false;
318 status_off = of_property_read_bool(client->dev.of_node,
319 "ti,pmic-shutdown-controller");
321 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
325 i2c_set_clientdata(client, tps);
326 tps->dev = &client->dev;
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",
337 tps65217_irq_init(tps, client->irq);
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;
346 ret = devm_mfd_add_devices(tps->dev, -1, tps65217s,
347 ARRAY_SIZE(tps65217s), NULL, 0,
350 dev_err(tps->dev, "mfd_add_devices failed: %d\n", ret);
354 ret = tps65217_reg_read(tps, TPS65217_REG_CHIPID, &version);
356 dev_err(tps->dev, "Failed to read revision register: %d\n",
361 /* Set the PMIC to shutdown on PWR_EN toggle */
363 ret = tps65217_set_bits(tps, TPS65217_REG_STATUS,
364 TPS65217_STATUS_OFF, TPS65217_STATUS_OFF,
365 TPS65217_PROTECT_NONE);
367 dev_warn(tps->dev, "unable to set the status OFF\n");
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);
377 static void tps65217_remove(struct i2c_client *client)
379 struct tps65217 *tps = i2c_get_clientdata(client);
383 for (i = 0; i < TPS65217_NUM_IRQ; i++) {
384 virq = irq_find_mapping(tps->irq_domain, i);
386 irq_dispose_mapping(virq);
389 irq_domain_remove(tps->irq_domain);
390 tps->irq_domain = NULL;
393 static const struct i2c_device_id tps65217_id_table[] = {
394 {"tps65217", TPS65217},
397 MODULE_DEVICE_TABLE(i2c, tps65217_id_table);
399 static struct i2c_driver tps65217_driver = {
402 .of_match_table = tps65217_of_match,
404 .id_table = tps65217_id_table,
405 .probe_new = tps65217_probe,
406 .remove = tps65217_remove,
409 static int __init tps65217_init(void)
411 return i2c_add_driver(&tps65217_driver);
413 subsys_initcall(tps65217_init);
415 static void __exit tps65217_exit(void)
417 i2c_del_driver(&tps65217_driver);
419 module_exit(tps65217_exit);
421 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
422 MODULE_DESCRIPTION("TPS65217 chip family multi-function driver");
423 MODULE_LICENSE("GPL v2");