2 * Core driver for TI TPS65090 PMIC family
4 * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 #include <linux/interrupt.h>
20 #include <linux/irq.h>
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/mutex.h>
24 #include <linux/slab.h>
25 #include <linux/i2c.h>
26 #include <linux/mfd/core.h>
27 #include <linux/mfd/tps65090.h>
28 #include <linux/regmap.h>
29 #include <linux/err.h>
32 #define TOTAL_NUM_REG 0x18
34 /* interrupt status registers */
35 #define TPS65090_INT_STS 0x0
36 #define TPS65090_INT_STS2 0x1
38 /* interrupt mask registers */
39 #define TPS65090_INT_MSK 0x2
40 #define TPS65090_INT_MSK2 0x3
42 struct tps65090_irq_data {
47 #define TPS65090_IRQ(_reg, _mask_pos) \
50 .mask_pos = (_mask_pos), \
53 static const struct tps65090_irq_data tps65090_irqs[] = {
54 [0] = TPS65090_IRQ(0, 0),
55 [1] = TPS65090_IRQ(0, 1),
56 [2] = TPS65090_IRQ(0, 2),
57 [3] = TPS65090_IRQ(0, 3),
58 [4] = TPS65090_IRQ(0, 4),
59 [5] = TPS65090_IRQ(0, 5),
60 [6] = TPS65090_IRQ(0, 6),
61 [7] = TPS65090_IRQ(0, 7),
62 [8] = TPS65090_IRQ(1, 0),
63 [9] = TPS65090_IRQ(1, 1),
64 [10] = TPS65090_IRQ(1, 2),
65 [11] = TPS65090_IRQ(1, 3),
66 [12] = TPS65090_IRQ(1, 4),
67 [13] = TPS65090_IRQ(1, 5),
68 [14] = TPS65090_IRQ(1, 6),
69 [15] = TPS65090_IRQ(1, 7),
72 static struct mfd_cell tps65090s[] = {
74 .name = "tps65090-pmic",
77 .name = "tps65090-regulator",
81 int tps65090_write(struct device *dev, int reg, uint8_t val)
83 struct tps65090 *tps = dev_get_drvdata(dev);
84 return regmap_write(tps->rmap, reg, val);
86 EXPORT_SYMBOL_GPL(tps65090_write);
88 int tps65090_read(struct device *dev, int reg, uint8_t *val)
90 struct tps65090 *tps = dev_get_drvdata(dev);
91 unsigned int temp_val;
93 ret = regmap_read(tps->rmap, reg, &temp_val);
98 EXPORT_SYMBOL_GPL(tps65090_read);
100 int tps65090_set_bits(struct device *dev, int reg, uint8_t bit_num)
102 struct tps65090 *tps = dev_get_drvdata(dev);
103 return regmap_update_bits(tps->rmap, reg, BIT(bit_num), ~0u);
105 EXPORT_SYMBOL_GPL(tps65090_set_bits);
107 int tps65090_clr_bits(struct device *dev, int reg, uint8_t bit_num)
109 struct tps65090 *tps = dev_get_drvdata(dev);
110 return regmap_update_bits(tps->rmap, reg, BIT(bit_num), 0u);
112 EXPORT_SYMBOL_GPL(tps65090_clr_bits);
114 static void tps65090_irq_lock(struct irq_data *data)
116 struct tps65090 *tps65090 = irq_data_get_irq_chip_data(data);
118 mutex_lock(&tps65090->irq_lock);
121 static void tps65090_irq_mask(struct irq_data *irq_data)
123 struct tps65090 *tps65090 = irq_data_get_irq_chip_data(irq_data);
124 unsigned int __irq = irq_data->hwirq;
125 const struct tps65090_irq_data *data = &tps65090_irqs[__irq];
127 tps65090_set_bits(tps65090->dev, (TPS65090_INT_MSK + data->mask_reg),
131 static void tps65090_irq_unmask(struct irq_data *irq_data)
133 struct tps65090 *tps65090 = irq_data_get_irq_chip_data(irq_data);
134 unsigned int __irq = irq_data->irq - tps65090->irq_base;
135 const struct tps65090_irq_data *data = &tps65090_irqs[__irq];
137 tps65090_clr_bits(tps65090->dev, (TPS65090_INT_MSK + data->mask_reg),
141 static void tps65090_irq_sync_unlock(struct irq_data *data)
143 struct tps65090 *tps65090 = irq_data_get_irq_chip_data(data);
145 mutex_unlock(&tps65090->irq_lock);
148 static irqreturn_t tps65090_irq(int irq, void *data)
150 struct tps65090 *tps65090 = data;
153 unsigned long int acks = 0;
156 for (i = 0; i < NUM_INT_REG; i++) {
157 ret = tps65090_read(tps65090->dev, TPS65090_INT_MSK + i, &mask);
159 dev_err(tps65090->dev,
160 "failed to read mask reg [addr:%d]\n",
161 TPS65090_INT_MSK + i);
164 ret = tps65090_read(tps65090->dev, TPS65090_INT_STS + i,
167 dev_err(tps65090->dev,
168 "failed to read status reg [addr:%d]\n",
169 TPS65090_INT_STS + i);
173 /* Ack only those interrupts which are not masked */
175 ret = tps65090_write(tps65090->dev,
176 TPS65090_INT_STS + i, status);
178 dev_err(tps65090->dev,
179 "failed to write interrupt status\n");
182 acks |= (status << (i * 8));
186 for_each_set_bit(i, &acks, ARRAY_SIZE(tps65090_irqs))
187 handle_nested_irq(tps65090->irq_base + i);
188 return acks ? IRQ_HANDLED : IRQ_NONE;
191 static int __devinit tps65090_irq_init(struct tps65090 *tps65090, int irq,
197 dev_err(tps65090->dev, "IRQ base not set\n");
201 mutex_init(&tps65090->irq_lock);
203 for (i = 0; i < NUM_INT_REG; i++)
204 tps65090_write(tps65090->dev, TPS65090_INT_MSK + i, 0xFF);
206 for (i = 0; i < NUM_INT_REG; i++)
207 tps65090_write(tps65090->dev, TPS65090_INT_STS + i, 0xff);
209 tps65090->irq_base = irq_base;
210 tps65090->irq_chip.name = "tps65090";
211 tps65090->irq_chip.irq_mask = tps65090_irq_mask;
212 tps65090->irq_chip.irq_unmask = tps65090_irq_unmask;
213 tps65090->irq_chip.irq_bus_lock = tps65090_irq_lock;
214 tps65090->irq_chip.irq_bus_sync_unlock = tps65090_irq_sync_unlock;
216 for (i = 0; i < ARRAY_SIZE(tps65090_irqs); i++) {
217 int __irq = i + tps65090->irq_base;
218 irq_set_chip_data(__irq, tps65090);
219 irq_set_chip_and_handler(__irq, &tps65090->irq_chip,
221 irq_set_nested_thread(__irq, 1);
223 set_irq_flags(__irq, IRQF_VALID);
227 ret = request_threaded_irq(irq, NULL, tps65090_irq, IRQF_ONESHOT,
228 "tps65090", tps65090);
230 device_init_wakeup(tps65090->dev, 1);
231 enable_irq_wake(irq);
237 static bool is_volatile_reg(struct device *dev, unsigned int reg)
239 if ((reg == TPS65090_INT_STS) || (reg == TPS65090_INT_STS))
245 static const struct regmap_config tps65090_regmap_config = {
248 .max_register = TOTAL_NUM_REG,
249 .num_reg_defaults_raw = TOTAL_NUM_REG,
250 .cache_type = REGCACHE_RBTREE,
251 .volatile_reg = is_volatile_reg,
254 static int __devinit tps65090_i2c_probe(struct i2c_client *client,
255 const struct i2c_device_id *id)
257 struct tps65090_platform_data *pdata = client->dev.platform_data;
258 struct tps65090 *tps65090;
262 dev_err(&client->dev, "tps65090 requires platform data\n");
266 tps65090 = devm_kzalloc(&client->dev, sizeof(struct tps65090),
268 if (tps65090 == NULL)
271 tps65090->client = client;
272 tps65090->dev = &client->dev;
273 i2c_set_clientdata(client, tps65090);
275 mutex_init(&tps65090->lock);
278 ret = tps65090_irq_init(tps65090, client->irq, pdata->irq_base);
280 dev_err(&client->dev, "IRQ init failed with err: %d\n",
286 tps65090->rmap = devm_regmap_init_i2c(tps65090->client,
287 &tps65090_regmap_config);
288 if (IS_ERR(tps65090->rmap)) {
289 ret = PTR_ERR(tps65090->rmap);
290 dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
294 ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
295 ARRAY_SIZE(tps65090s), NULL, 0, NULL);
297 dev_err(&client->dev, "add mfd devices failed with err: %d\n",
306 free_irq(client->irq, tps65090);
311 static int __devexit tps65090_i2c_remove(struct i2c_client *client)
313 struct tps65090 *tps65090 = i2c_get_clientdata(client);
315 mfd_remove_devices(tps65090->dev);
317 free_irq(client->irq, tps65090);
322 #ifdef CONFIG_PM_SLEEP
323 static int tps65090_suspend(struct device *dev)
325 struct i2c_client *client = to_i2c_client(dev);
327 disable_irq(client->irq);
331 static int tps65090_resume(struct device *dev)
333 struct i2c_client *client = to_i2c_client(dev);
335 enable_irq(client->irq);
340 static const struct dev_pm_ops tps65090_pm_ops = {
341 SET_SYSTEM_SLEEP_PM_OPS(tps65090_suspend, tps65090_resume)
344 static const struct i2c_device_id tps65090_id_table[] = {
348 MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
350 static struct i2c_driver tps65090_driver = {
353 .owner = THIS_MODULE,
354 .pm = &tps65090_pm_ops,
356 .probe = tps65090_i2c_probe,
357 .remove = __devexit_p(tps65090_i2c_remove),
358 .id_table = tps65090_id_table,
361 static int __init tps65090_init(void)
363 return i2c_add_driver(&tps65090_driver);
365 subsys_initcall(tps65090_init);
367 static void __exit tps65090_exit(void)
369 i2c_del_driver(&tps65090_driver);
371 module_exit(tps65090_exit);
373 MODULE_DESCRIPTION("TPS65090 core driver");
374 MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
375 MODULE_LICENSE("GPL v2");