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Venu Byravarasu3c33be062012-03-16 11:10:19 +05301/*
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>
Laxman Dewangan40719312013-01-29 14:35:15 +053028#include <linux/of.h>
29#include <linux/of_device.h>
Venu Byravarasu3c33be062012-03-16 11:10:19 +053030#include <linux/err.h>
31
32#define NUM_INT_REG 2
33#define TOTAL_NUM_REG 0x18
34
Laxman Dewangan759f2592012-11-20 08:44:49 +053035#define TPS65090_INT1_MASK_VAC_STATUS_CHANGE 1
36#define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE 2
37#define TPS65090_INT1_MASK_BAT_STATUS_CHANGE 3
38#define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE 4
39#define TPS65090_INT1_MASK_CHARGING_COMPLETE 5
40#define TPS65090_INT1_MASK_OVERLOAD_DCDC1 6
41#define TPS65090_INT1_MASK_OVERLOAD_DCDC2 7
42#define TPS65090_INT2_MASK_OVERLOAD_DCDC3 0
43#define TPS65090_INT2_MASK_OVERLOAD_FET1 1
44#define TPS65090_INT2_MASK_OVERLOAD_FET2 2
45#define TPS65090_INT2_MASK_OVERLOAD_FET3 3
46#define TPS65090_INT2_MASK_OVERLOAD_FET4 4
47#define TPS65090_INT2_MASK_OVERLOAD_FET5 5
48#define TPS65090_INT2_MASK_OVERLOAD_FET6 6
49#define TPS65090_INT2_MASK_OVERLOAD_FET7 7
Venu Byravarasu3c33be062012-03-16 11:10:19 +053050
Rhyland Klein36c772e2013-03-12 18:08:07 -040051static struct resource charger_resources[] = {
52 {
53 .start = TPS65090_IRQ_VAC_STATUS_CHANGE,
54 .end = TPS65090_IRQ_VAC_STATUS_CHANGE,
55 .flags = IORESOURCE_IRQ,
56 }
57};
58
Doug Anderson7d811772014-04-16 16:12:25 -070059enum tps65090_cells {
60 PMIC = 0,
61 CHARGER = 1,
62};
63
64static struct mfd_cell tps65090s[] = {
65 [PMIC] = {
Venu Byravarasub7e53782012-07-18 18:33:42 +053066 .name = "tps65090-pmic",
Venu Byravarasu3c33be062012-03-16 11:10:19 +053067 },
Doug Anderson7d811772014-04-16 16:12:25 -070068 [CHARGER] = {
Laxman Dewangane2e8ffc2012-11-20 08:44:45 +053069 .name = "tps65090-charger",
Rhyland Klein36c772e2013-03-12 18:08:07 -040070 .num_resources = ARRAY_SIZE(charger_resources),
71 .resources = &charger_resources[0],
Rhyland Kleinb50cf352013-04-10 13:14:55 -040072 .of_compatible = "ti,tps65090-charger",
Venu Byravarasu3c33be062012-03-16 11:10:19 +053073 },
74};
75
Laxman Dewangan759f2592012-11-20 08:44:49 +053076static const struct regmap_irq tps65090_irqs[] = {
77 /* INT1 IRQs*/
78 [TPS65090_IRQ_VAC_STATUS_CHANGE] = {
79 .mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,
80 },
81 [TPS65090_IRQ_VSYS_STATUS_CHANGE] = {
82 .mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,
83 },
84 [TPS65090_IRQ_BAT_STATUS_CHANGE] = {
85 .mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,
86 },
87 [TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {
88 .mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,
89 },
90 [TPS65090_IRQ_CHARGING_COMPLETE] = {
91 .mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,
92 },
93 [TPS65090_IRQ_OVERLOAD_DCDC1] = {
94 .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,
95 },
96 [TPS65090_IRQ_OVERLOAD_DCDC2] = {
97 .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,
98 },
99 /* INT2 IRQs*/
100 [TPS65090_IRQ_OVERLOAD_DCDC3] = {
101 .reg_offset = 1,
102 .mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,
103 },
104 [TPS65090_IRQ_OVERLOAD_FET1] = {
105 .reg_offset = 1,
106 .mask = TPS65090_INT2_MASK_OVERLOAD_FET1,
107 },
108 [TPS65090_IRQ_OVERLOAD_FET2] = {
109 .reg_offset = 1,
110 .mask = TPS65090_INT2_MASK_OVERLOAD_FET2,
111 },
112 [TPS65090_IRQ_OVERLOAD_FET3] = {
113 .reg_offset = 1,
114 .mask = TPS65090_INT2_MASK_OVERLOAD_FET3,
115 },
116 [TPS65090_IRQ_OVERLOAD_FET4] = {
117 .reg_offset = 1,
118 .mask = TPS65090_INT2_MASK_OVERLOAD_FET4,
119 },
120 [TPS65090_IRQ_OVERLOAD_FET5] = {
121 .reg_offset = 1,
122 .mask = TPS65090_INT2_MASK_OVERLOAD_FET5,
123 },
124 [TPS65090_IRQ_OVERLOAD_FET6] = {
125 .reg_offset = 1,
126 .mask = TPS65090_INT2_MASK_OVERLOAD_FET6,
127 },
128 [TPS65090_IRQ_OVERLOAD_FET7] = {
129 .reg_offset = 1,
130 .mask = TPS65090_INT2_MASK_OVERLOAD_FET7,
131 },
132};
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530133
Laxman Dewangan759f2592012-11-20 08:44:49 +0530134static struct regmap_irq_chip tps65090_irq_chip = {
135 .name = "tps65090",
136 .irqs = tps65090_irqs,
137 .num_irqs = ARRAY_SIZE(tps65090_irqs),
138 .num_regs = NUM_INT_REG,
Doug Andersonc42ba722014-04-16 16:12:27 -0700139 .status_base = TPS65090_REG_INTR_STS,
140 .mask_base = TPS65090_REG_INTR_MASK,
Laxman Dewangan759f2592012-11-20 08:44:49 +0530141 .mask_invert = true,
142};
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530143
144static bool is_volatile_reg(struct device *dev, unsigned int reg)
145{
Doug Andersonc42ba722014-04-16 16:12:27 -0700146 /* Nearly all registers have status bits mixed in, except a few */
147 switch (reg) {
148 case TPS65090_REG_INTR_MASK:
149 case TPS65090_REG_INTR_MASK2:
150 case TPS65090_REG_CG_CTRL0:
151 case TPS65090_REG_CG_CTRL1:
152 case TPS65090_REG_CG_CTRL2:
153 case TPS65090_REG_CG_CTRL3:
154 case TPS65090_REG_CG_CTRL4:
155 case TPS65090_REG_CG_CTRL5:
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530156 return false;
Doug Andersonc42ba722014-04-16 16:12:27 -0700157 }
158 return true;
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530159}
160
161static const struct regmap_config tps65090_regmap_config = {
162 .reg_bits = 8,
163 .val_bits = 8,
164 .max_register = TOTAL_NUM_REG,
165 .num_reg_defaults_raw = TOTAL_NUM_REG,
166 .cache_type = REGCACHE_RBTREE,
167 .volatile_reg = is_volatile_reg,
168};
169
Laxman Dewangan40719312013-01-29 14:35:15 +0530170#ifdef CONFIG_OF
171static const struct of_device_id tps65090_of_match[] = {
172 { .compatible = "ti,tps65090",},
173 {},
174};
175MODULE_DEVICE_TABLE(of, tps65090_of_match);
176#endif
177
Bill Pembertonf791be42012-11-19 13:23:04 -0500178static int tps65090_i2c_probe(struct i2c_client *client,
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530179 const struct i2c_device_id *id)
180{
Jingoo Han334a41c2013-07-30 17:10:05 +0900181 struct tps65090_platform_data *pdata = dev_get_platdata(&client->dev);
Laxman Dewangan40719312013-01-29 14:35:15 +0530182 int irq_base = 0;
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530183 struct tps65090 *tps65090;
184 int ret;
185
Laxman Dewangan40719312013-01-29 14:35:15 +0530186 if (!pdata && !client->dev.of_node) {
187 dev_err(&client->dev,
188 "tps65090 requires platform data or of_node\n");
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530189 return -EINVAL;
190 }
191
Laxman Dewangan40719312013-01-29 14:35:15 +0530192 if (pdata)
193 irq_base = pdata->irq_base;
194
Laxman Dewangane8e6f042012-11-20 08:44:46 +0530195 tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
196 if (!tps65090) {
197 dev_err(&client->dev, "mem alloc for tps65090 failed\n");
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530198 return -ENOMEM;
Laxman Dewangane8e6f042012-11-20 08:44:46 +0530199 }
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530200
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530201 tps65090->dev = &client->dev;
202 i2c_set_clientdata(client, tps65090);
203
Laxman Dewangan3863db32012-11-20 08:44:47 +0530204 tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530205 if (IS_ERR(tps65090->rmap)) {
Axel Linb683a0a2012-04-25 09:30:36 +0800206 ret = PTR_ERR(tps65090->rmap);
207 dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
Laxman Dewangan759f2592012-11-20 08:44:49 +0530208 return ret;
209 }
210
211 if (client->irq) {
212 ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
Laxman Dewangan40719312013-01-29 14:35:15 +0530213 IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base,
Laxman Dewangan759f2592012-11-20 08:44:49 +0530214 &tps65090_irq_chip, &tps65090->irq_data);
215 if (ret) {
216 dev_err(&client->dev,
217 "IRQ init failed with err: %d\n", ret);
218 return ret;
219 }
Doug Anderson7d811772014-04-16 16:12:25 -0700220 } else {
221 /* Don't tell children they have an IRQ that'll never fire */
222 tps65090s[CHARGER].num_resources = 0;
Axel Linb683a0a2012-04-25 09:30:36 +0800223 }
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530224
225 ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
Laxman Dewangan759f2592012-11-20 08:44:49 +0530226 ARRAY_SIZE(tps65090s), NULL,
Laxman Dewangan4f979ed2013-01-29 14:35:17 +0530227 0, regmap_irq_get_domain(tps65090->irq_data));
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530228 if (ret) {
229 dev_err(&client->dev, "add mfd devices failed with err: %d\n",
230 ret);
Axel Lin1d88f7a2012-04-25 10:04:58 +0800231 goto err_irq_exit;
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530232 }
233
234 return 0;
235
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530236err_irq_exit:
237 if (client->irq)
Laxman Dewangan759f2592012-11-20 08:44:49 +0530238 regmap_del_irq_chip(client->irq, tps65090->irq_data);
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530239 return ret;
240}
241
Bill Pemberton4740f732012-11-19 13:26:01 -0500242static int tps65090_i2c_remove(struct i2c_client *client)
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530243{
244 struct tps65090 *tps65090 = i2c_get_clientdata(client);
245
246 mfd_remove_devices(tps65090->dev);
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530247 if (client->irq)
Laxman Dewangan759f2592012-11-20 08:44:49 +0530248 regmap_del_irq_chip(client->irq, tps65090->irq_data);
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530249
250 return 0;
251}
252
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530253static const struct i2c_device_id tps65090_id_table[] = {
254 { "tps65090", 0 },
255 { },
256};
257MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
258
259static struct i2c_driver tps65090_driver = {
260 .driver = {
261 .name = "tps65090",
262 .owner = THIS_MODULE,
Laxman Dewangan40719312013-01-29 14:35:15 +0530263 .of_match_table = of_match_ptr(tps65090_of_match),
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530264 },
265 .probe = tps65090_i2c_probe,
Bill Pemberton84449212012-11-19 13:20:24 -0500266 .remove = tps65090_i2c_remove,
Venu Byravarasu3c33be062012-03-16 11:10:19 +0530267 .id_table = tps65090_id_table,
268};
269
270static int __init tps65090_init(void)
271{
272 return i2c_add_driver(&tps65090_driver);
273}
274subsys_initcall(tps65090_init);
275
276static void __exit tps65090_exit(void)
277{
278 i2c_del_driver(&tps65090_driver);
279}
280module_exit(tps65090_exit);
281
282MODULE_DESCRIPTION("TPS65090 core driver");
283MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
284MODULE_LICENSE("GPL v2");