1/*
  2 * Core driver for TI TPS65090 PMIC family
  3 *
  4 * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
  5
  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.
  9
 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
 13 * more details.
 14
 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/>.
 17 */
 18
 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/of.h>
 29#include <linux/of_device.h>
 30#include <linux/err.h>
 31
 32#define NUM_INT_REG 2
 33#define TOTAL_NUM_REG 0x18
 34
 35/* interrupt status registers */
 36#define TPS65090_INT_STS	0x0
 37#define TPS65090_INT_STS2	0x1
 38
 39/* interrupt mask registers */
 40#define TPS65090_INT_MSK	0x2
 41#define TPS65090_INT_MSK2	0x3
 42
 43#define TPS65090_INT1_MASK_VAC_STATUS_CHANGE		1
 44#define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE		2
 45#define TPS65090_INT1_MASK_BAT_STATUS_CHANGE		3
 46#define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE	4
 47#define TPS65090_INT1_MASK_CHARGING_COMPLETE		5
 48#define TPS65090_INT1_MASK_OVERLOAD_DCDC1		6
 49#define TPS65090_INT1_MASK_OVERLOAD_DCDC2		7
 50#define TPS65090_INT2_MASK_OVERLOAD_DCDC3		0
 51#define TPS65090_INT2_MASK_OVERLOAD_FET1		1
 52#define TPS65090_INT2_MASK_OVERLOAD_FET2		2
 53#define TPS65090_INT2_MASK_OVERLOAD_FET3		3
 54#define TPS65090_INT2_MASK_OVERLOAD_FET4		4
 55#define TPS65090_INT2_MASK_OVERLOAD_FET5		5
 56#define TPS65090_INT2_MASK_OVERLOAD_FET6		6
 57#define TPS65090_INT2_MASK_OVERLOAD_FET7		7
 58
 59static struct resource charger_resources[] = {
 60	{
 61		.start  = TPS65090_IRQ_VAC_STATUS_CHANGE,
 62		.end    = TPS65090_IRQ_VAC_STATUS_CHANGE,
 63		.flags  = IORESOURCE_IRQ,
 64	}
 65};
 66
 67static const struct mfd_cell tps65090s[] = {
 68	{
 69		.name = "tps65090-pmic",
 70	},
 71	{
 72		.name = "tps65090-charger",
 73		.num_resources = ARRAY_SIZE(charger_resources),
 74		.resources = &charger_resources[0],
 75		.of_compatible = "ti,tps65090-charger",
 76	},
 77};
 78
 79static const struct regmap_irq tps65090_irqs[] = {
 80	/* INT1 IRQs*/
 81	[TPS65090_IRQ_VAC_STATUS_CHANGE] = {
 82			.mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,
 83	},
 84	[TPS65090_IRQ_VSYS_STATUS_CHANGE] = {
 85			.mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,
 86	},
 87	[TPS65090_IRQ_BAT_STATUS_CHANGE] = {
 88			.mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,
 89	},
 90	[TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {
 91			.mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,
 92	},
 93	[TPS65090_IRQ_CHARGING_COMPLETE] = {
 94			.mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,
 95	},
 96	[TPS65090_IRQ_OVERLOAD_DCDC1] = {
 97			.mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,
 98	},
 99	[TPS65090_IRQ_OVERLOAD_DCDC2] = {
100			.mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,
101	},
102	/* INT2 IRQs*/
103	[TPS65090_IRQ_OVERLOAD_DCDC3] = {
104			.reg_offset = 1,
105			.mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,
106	},
107	[TPS65090_IRQ_OVERLOAD_FET1] = {
108			.reg_offset = 1,
109			.mask = TPS65090_INT2_MASK_OVERLOAD_FET1,
110	},
111	[TPS65090_IRQ_OVERLOAD_FET2] = {
112			.reg_offset = 1,
113			.mask = TPS65090_INT2_MASK_OVERLOAD_FET2,
114	},
115	[TPS65090_IRQ_OVERLOAD_FET3] = {
116			.reg_offset = 1,
117			.mask = TPS65090_INT2_MASK_OVERLOAD_FET3,
118	},
119	[TPS65090_IRQ_OVERLOAD_FET4] = {
120			.reg_offset = 1,
121			.mask = TPS65090_INT2_MASK_OVERLOAD_FET4,
122	},
123	[TPS65090_IRQ_OVERLOAD_FET5] = {
124			.reg_offset = 1,
125			.mask = TPS65090_INT2_MASK_OVERLOAD_FET5,
126	},
127	[TPS65090_IRQ_OVERLOAD_FET6] = {
128			.reg_offset = 1,
129			.mask = TPS65090_INT2_MASK_OVERLOAD_FET6,
130	},
131	[TPS65090_IRQ_OVERLOAD_FET7] = {
132			.reg_offset = 1,
133			.mask = TPS65090_INT2_MASK_OVERLOAD_FET7,
134	},
135};
136
137static struct regmap_irq_chip tps65090_irq_chip = {
138	.name = "tps65090",
139	.irqs = tps65090_irqs,
140	.num_irqs = ARRAY_SIZE(tps65090_irqs),
141	.num_regs = NUM_INT_REG,
142	.status_base = TPS65090_INT_STS,
143	.mask_base = TPS65090_INT_MSK,
144	.mask_invert = true,
145};
146
147static bool is_volatile_reg(struct device *dev, unsigned int reg)
148{
149	if ((reg == TPS65090_INT_STS) || (reg == TPS65090_INT_STS2))
150		return true;
151	else
152		return false;
153}
154
155static const struct regmap_config tps65090_regmap_config = {
156	.reg_bits = 8,
157	.val_bits = 8,
158	.max_register = TOTAL_NUM_REG,
159	.num_reg_defaults_raw = TOTAL_NUM_REG,
160	.cache_type = REGCACHE_RBTREE,
161	.volatile_reg = is_volatile_reg,
162};
163
164#ifdef CONFIG_OF
165static const struct of_device_id tps65090_of_match[] = {
166	{ .compatible = "ti,tps65090",},
167	{},
168};
169MODULE_DEVICE_TABLE(of, tps65090_of_match);
170#endif
171
172static int tps65090_i2c_probe(struct i2c_client *client,
173					const struct i2c_device_id *id)
174{
175	struct tps65090_platform_data *pdata = dev_get_platdata(&client->dev);
176	int irq_base = 0;
177	struct tps65090 *tps65090;
178	int ret;
179
180	if (!pdata && !client->dev.of_node) {
181		dev_err(&client->dev,
182			"tps65090 requires platform data or of_node\n");
183		return -EINVAL;
184	}
185
186	if (pdata)
187		irq_base = pdata->irq_base;
188
189	tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
190	if (!tps65090) {
191		dev_err(&client->dev, "mem alloc for tps65090 failed\n");
192		return -ENOMEM;
193	}
194
195	tps65090->dev = &client->dev;
196	i2c_set_clientdata(client, tps65090);
197
198	tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
199	if (IS_ERR(tps65090->rmap)) {
200		ret = PTR_ERR(tps65090->rmap);
201		dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
202		return ret;
203	}
204
205	if (client->irq) {
206		ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
207			IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base,
208			&tps65090_irq_chip, &tps65090->irq_data);
209			if (ret) {
210				dev_err(&client->dev,
211					"IRQ init failed with err: %d\n", ret);
212			return ret;
213		}
214	}
215
216	ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
217		ARRAY_SIZE(tps65090s), NULL,
218		0, regmap_irq_get_domain(tps65090->irq_data));
219	if (ret) {
220		dev_err(&client->dev, "add mfd devices failed with err: %d\n",
221			ret);
222		goto err_irq_exit;
223	}
224
225	return 0;
226
227err_irq_exit:
228	if (client->irq)
229		regmap_del_irq_chip(client->irq, tps65090->irq_data);
230	return ret;
231}
232
233static int tps65090_i2c_remove(struct i2c_client *client)
234{
235	struct tps65090 *tps65090 = i2c_get_clientdata(client);
236
237	mfd_remove_devices(tps65090->dev);
238	if (client->irq)
239		regmap_del_irq_chip(client->irq, tps65090->irq_data);
240
241	return 0;
242}
243
244static const struct i2c_device_id tps65090_id_table[] = {
245	{ "tps65090", 0 },
246	{ },
247};
248MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
249
250static struct i2c_driver tps65090_driver = {
251	.driver	= {
252		.name	= "tps65090",
253		.owner	= THIS_MODULE,
254		.of_match_table = of_match_ptr(tps65090_of_match),
255	},
256	.probe		= tps65090_i2c_probe,
257	.remove		= tps65090_i2c_remove,
258	.id_table	= tps65090_id_table,
259};
260
261static int __init tps65090_init(void)
262{
263	return i2c_add_driver(&tps65090_driver);
264}
265subsys_initcall(tps65090_init);
266
267static void __exit tps65090_exit(void)
268{
269	i2c_del_driver(&tps65090_driver);
270}
271module_exit(tps65090_exit);
272
273MODULE_DESCRIPTION("TPS65090 core driver");
274MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
275MODULE_LICENSE("GPL v2");