Merge branch 'vmwgfx-fixes-4.3' of git://people.freedesktop.org/~thomash/linux
[firefly-linux-kernel-4.4.55.git] / drivers / mfd / tps65090.c
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
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
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
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                 .of_match_table = of_match_ptr(tps65090_of_match),
263         },
264         .probe          = tps65090_i2c_probe,
265         .remove         = tps65090_i2c_remove,
266         .id_table       = tps65090_id_table,
267 };
268
269 static int __init tps65090_init(void)
270 {
271         return i2c_add_driver(&tps65090_driver);
272 }
273 subsys_initcall(tps65090_init);
274
275 static void __exit tps65090_exit(void)
276 {
277         i2c_del_driver(&tps65090_driver);
278 }
279 module_exit(tps65090_exit);
280
281 MODULE_DESCRIPTION("TPS65090 core driver");
282 MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
283 MODULE_LICENSE("GPL v2");