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 = "tps65910-pmic",
77 .name = "tps65910-regulator",
84 struct i2c_client *client;
86 struct irq_chip irq_chip;
87 struct mutex irq_lock;
92 int tps65090_write(struct device *dev, int reg, uint8_t val)
94 struct tps65090 *tps = dev_get_drvdata(dev);
95 return regmap_write(tps->rmap, reg, val);
97 EXPORT_SYMBOL_GPL(tps65090_write);
99 int tps65090_read(struct device *dev, int reg, uint8_t *val)
101 struct tps65090 *tps = dev_get_drvdata(dev);
102 unsigned int temp_val;
104 ret = regmap_read(tps->rmap, reg, &temp_val);
109 EXPORT_SYMBOL_GPL(tps65090_read);
111 int tps65090_set_bits(struct device *dev, int reg, uint8_t bit_num)
113 struct tps65090 *tps = dev_get_drvdata(dev);
114 return regmap_update_bits(tps->rmap, reg, BIT(bit_num), ~0u);
116 EXPORT_SYMBOL_GPL(tps65090_set_bits);
118 int tps65090_clr_bits(struct device *dev, int reg, uint8_t bit_num)
120 struct tps65090 *tps = dev_get_drvdata(dev);
121 return regmap_update_bits(tps->rmap, reg, BIT(bit_num), 0u);
123 EXPORT_SYMBOL_GPL(tps65090_clr_bits);
125 static void tps65090_irq_lock(struct irq_data *data)
127 struct tps65090 *tps65090 = irq_data_get_irq_chip_data(data);
129 mutex_lock(&tps65090->irq_lock);
132 static void tps65090_irq_mask(struct irq_data *irq_data)
134 struct tps65090 *tps65090 = irq_data_get_irq_chip_data(irq_data);
135 unsigned int __irq = irq_data->hwirq;
136 const struct tps65090_irq_data *data = &tps65090_irqs[__irq];
138 tps65090_set_bits(tps65090->dev, (TPS65090_INT_MSK + data->mask_reg),
142 static void tps65090_irq_unmask(struct irq_data *irq_data)
144 struct tps65090 *tps65090 = irq_data_get_irq_chip_data(irq_data);
145 unsigned int __irq = irq_data->irq - tps65090->irq_base;
146 const struct tps65090_irq_data *data = &tps65090_irqs[__irq];
148 tps65090_clr_bits(tps65090->dev, (TPS65090_INT_MSK + data->mask_reg),
152 static void tps65090_irq_sync_unlock(struct irq_data *data)
154 struct tps65090 *tps65090 = irq_data_get_irq_chip_data(data);
156 mutex_unlock(&tps65090->irq_lock);
159 static irqreturn_t tps65090_irq(int irq, void *data)
161 struct tps65090 *tps65090 = data;
164 unsigned long int acks = 0;
167 for (i = 0; i < NUM_INT_REG; i++) {
168 ret = tps65090_read(tps65090->dev, TPS65090_INT_MSK + i, &mask);
170 dev_err(tps65090->dev,
171 "failed to read mask reg [addr:%d]\n",
172 TPS65090_INT_MSK + i);
175 ret = tps65090_read(tps65090->dev, TPS65090_INT_STS + i,
178 dev_err(tps65090->dev,
179 "failed to read status reg [addr:%d]\n",
180 TPS65090_INT_STS + i);
184 /* Ack only those interrupts which are not masked */
186 ret = tps65090_write(tps65090->dev,
187 TPS65090_INT_STS + i, status);
189 dev_err(tps65090->dev,
190 "failed to write interrupt status\n");
193 acks |= (status << (i * 8));
197 for_each_set_bit(i, &acks, ARRAY_SIZE(tps65090_irqs))
198 handle_nested_irq(tps65090->irq_base + i);
199 return acks ? IRQ_HANDLED : IRQ_NONE;
202 static int __devinit tps65090_irq_init(struct tps65090 *tps65090, int irq,
208 dev_err(tps65090->dev, "IRQ base not set\n");
212 mutex_init(&tps65090->irq_lock);
214 for (i = 0; i < NUM_INT_REG; i++)
215 tps65090_write(tps65090->dev, TPS65090_INT_MSK + i, 0xFF);
217 for (i = 0; i < NUM_INT_REG; i++)
218 tps65090_write(tps65090->dev, TPS65090_INT_STS + i, 0xff);
220 tps65090->irq_base = irq_base;
221 tps65090->irq_chip.name = "tps65090";
222 tps65090->irq_chip.irq_mask = tps65090_irq_mask;
223 tps65090->irq_chip.irq_unmask = tps65090_irq_unmask;
224 tps65090->irq_chip.irq_bus_lock = tps65090_irq_lock;
225 tps65090->irq_chip.irq_bus_sync_unlock = tps65090_irq_sync_unlock;
227 for (i = 0; i < ARRAY_SIZE(tps65090_irqs); i++) {
228 int __irq = i + tps65090->irq_base;
229 irq_set_chip_data(__irq, tps65090);
230 irq_set_chip_and_handler(__irq, &tps65090->irq_chip,
232 irq_set_nested_thread(__irq, 1);
234 set_irq_flags(__irq, IRQF_VALID);
238 ret = request_threaded_irq(irq, NULL, tps65090_irq, IRQF_ONESHOT,
239 "tps65090", tps65090);
241 device_init_wakeup(tps65090->dev, 1);
242 enable_irq_wake(irq);
248 static bool is_volatile_reg(struct device *dev, unsigned int reg)
250 if ((reg == TPS65090_INT_STS) || (reg == TPS65090_INT_STS))
256 static const struct regmap_config tps65090_regmap_config = {
259 .max_register = TOTAL_NUM_REG,
260 .num_reg_defaults_raw = TOTAL_NUM_REG,
261 .cache_type = REGCACHE_RBTREE,
262 .volatile_reg = is_volatile_reg,
265 static int __devinit tps65090_i2c_probe(struct i2c_client *client,
266 const struct i2c_device_id *id)
268 struct tps65090_platform_data *pdata = client->dev.platform_data;
269 struct tps65090 *tps65090;
273 dev_err(&client->dev, "tps65090 requires platform data\n");
277 tps65090 = devm_kzalloc(&client->dev, sizeof(struct tps65090),
279 if (tps65090 == NULL)
282 tps65090->client = client;
283 tps65090->dev = &client->dev;
284 i2c_set_clientdata(client, tps65090);
286 mutex_init(&tps65090->lock);
289 ret = tps65090_irq_init(tps65090, client->irq, pdata->irq_base);
291 dev_err(&client->dev, "IRQ init failed with err: %d\n",
297 tps65090->rmap = regmap_init_i2c(tps65090->client,
298 &tps65090_regmap_config);
299 if (IS_ERR(tps65090->rmap)) {
300 dev_err(&client->dev, "regmap_init failed with err: %ld\n",
301 PTR_ERR(tps65090->rmap));
305 ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
306 ARRAY_SIZE(tps65090s), NULL, 0);
308 dev_err(&client->dev, "add mfd devices failed with err: %d\n",
310 goto err_regmap_exit;
316 regmap_exit(tps65090->rmap);
320 free_irq(client->irq, tps65090);
325 static int __devexit tps65090_i2c_remove(struct i2c_client *client)
327 struct tps65090 *tps65090 = i2c_get_clientdata(client);
329 mfd_remove_devices(tps65090->dev);
330 regmap_exit(tps65090->rmap);
332 free_irq(client->irq, tps65090);
338 static int tps65090_i2c_suspend(struct i2c_client *client, pm_message_t state)
341 disable_irq(client->irq);
345 static int tps65090_i2c_resume(struct i2c_client *client)
348 enable_irq(client->irq);
353 static const struct i2c_device_id tps65090_id_table[] = {
357 MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
359 static struct i2c_driver tps65090_driver = {
362 .owner = THIS_MODULE,
364 .probe = tps65090_i2c_probe,
365 .remove = __devexit_p(tps65090_i2c_remove),
367 .suspend = tps65090_i2c_suspend,
368 .resume = tps65090_i2c_resume,
370 .id_table = tps65090_id_table,
373 static int __init tps65090_init(void)
375 return i2c_add_driver(&tps65090_driver);
377 subsys_initcall(tps65090_init);
379 static void __exit tps65090_exit(void)
381 i2c_del_driver(&tps65090_driver);
383 module_exit(tps65090_exit);
385 MODULE_DESCRIPTION("TPS65090 core driver");
386 MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
387 MODULE_LICENSE("GPL v2");