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 #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
50
51 static 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
59 enum tps65090_cells {
60 PMIC = 0,
61 CHARGER = 1,
62 };
63
64 static struct mfd_cell tps65090s[] = {
65 [PMIC] = {
66 .name = "tps65090-pmic",
67 },
68 [CHARGER] = {
69 .name = "tps65090-charger",
70 .num_resources = ARRAY_SIZE(charger_resources),
71 .resources = &charger_resources[0],
72 .of_compatible = "ti,tps65090-charger",
73 },
74 };
75
76 static 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 };
133
134 static 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,
139 .status_base = TPS65090_REG_INTR_STS,
140 .mask_base = TPS65090_REG_INTR_MASK,
141 .mask_invert = true,
142 };
143
is_volatile_reg(struct device * dev,unsigned int reg)144 static bool is_volatile_reg(struct device *dev, unsigned int reg)
145 {
146 /* 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:
156 return false;
157 }
158 return true;
159 }
160
161 static 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
170 #ifdef CONFIG_OF
171 static const struct of_device_id tps65090_of_match[] = {
172 { .compatible = "ti,tps65090",},
173 {},
174 };
175 MODULE_DEVICE_TABLE(of, tps65090_of_match);
176 #endif
177
tps65090_i2c_probe(struct i2c_client * client,const struct i2c_device_id * id)178 static int tps65090_i2c_probe(struct i2c_client *client,
179 const struct i2c_device_id *id)
180 {
181 struct tps65090_platform_data *pdata = dev_get_platdata(&client->dev);
182 int irq_base = 0;
183 struct tps65090 *tps65090;
184 int ret;
185
186 if (!pdata && !client->dev.of_node) {
187 dev_err(&client->dev,
188 "tps65090 requires platform data or of_node\n");
189 return -EINVAL;
190 }
191
192 if (pdata)
193 irq_base = pdata->irq_base;
194
195 tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
196 if (!tps65090) {
197 dev_err(&client->dev, "mem alloc for tps65090 failed\n");
198 return -ENOMEM;
199 }
200
201 tps65090->dev = &client->dev;
202 i2c_set_clientdata(client, tps65090);
203
204 tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
205 if (IS_ERR(tps65090->rmap)) {
206 ret = PTR_ERR(tps65090->rmap);
207 dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
208 return ret;
209 }
210
211 if (client->irq) {
212 ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
213 IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base,
214 &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 }
220 } else {
221 /* Don't tell children they have an IRQ that'll never fire */
222 tps65090s[CHARGER].num_resources = 0;
223 }
224
225 ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
226 ARRAY_SIZE(tps65090s), NULL,
227 0, regmap_irq_get_domain(tps65090->irq_data));
228 if (ret) {
229 dev_err(&client->dev, "add mfd devices failed with err: %d\n",
230 ret);
231 goto err_irq_exit;
232 }
233
234 return 0;
235
236 err_irq_exit:
237 if (client->irq)
238 regmap_del_irq_chip(client->irq, tps65090->irq_data);
239 return ret;
240 }
241
tps65090_i2c_remove(struct i2c_client * client)242 static int tps65090_i2c_remove(struct i2c_client *client)
243 {
244 struct tps65090 *tps65090 = i2c_get_clientdata(client);
245
246 mfd_remove_devices(tps65090->dev);
247 if (client->irq)
248 regmap_del_irq_chip(client->irq, tps65090->irq_data);
249
250 return 0;
251 }
252
253 static const struct i2c_device_id tps65090_id_table[] = {
254 { "tps65090", 0 },
255 { },
256 };
257 MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
258
259 static struct i2c_driver tps65090_driver = {
260 .driver = {
261 .name = "tps65090",
262 .owner = THIS_MODULE,
263 .of_match_table = of_match_ptr(tps65090_of_match),
264 },
265 .probe = tps65090_i2c_probe,
266 .remove = tps65090_i2c_remove,
267 .id_table = tps65090_id_table,
268 };
269
tps65090_init(void)270 static int __init tps65090_init(void)
271 {
272 return i2c_add_driver(&tps65090_driver);
273 }
274 subsys_initcall(tps65090_init);
275
tps65090_exit(void)276 static void __exit tps65090_exit(void)
277 {
278 i2c_del_driver(&tps65090_driver);
279 }
280 module_exit(tps65090_exit);
281
282 MODULE_DESCRIPTION("TPS65090 core driver");
283 MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
284 MODULE_LICENSE("GPL v2");
285