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Linux/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 /* 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 
 59 static 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 
 67 static 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 
 79 static 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 
137 static 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 
147 static 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 
155 static 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
165 static const struct of_device_id tps65090_of_match[] = {
166         { .compatible = "ti,tps65090",},
167         {},
168 };
169 MODULE_DEVICE_TABLE(of, tps65090_of_match);
170 #endif
171 
172 static 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 
227 err_irq_exit:
228         if (client->irq)
229                 regmap_del_irq_chip(client->irq, tps65090->irq_data);
230         return ret;
231 }
232 
233 static 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 
244 static const struct i2c_device_id tps65090_id_table[] = {
245         { "tps65090", 0 },
246         { },
247 };
248 MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
249 
250 static 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 
261 static int __init tps65090_init(void)
262 {
263         return i2c_add_driver(&tps65090_driver);
264 }
265 subsys_initcall(tps65090_init);
266 
267 static void __exit tps65090_exit(void)
268 {
269         i2c_del_driver(&tps65090_driver);
270 }
271 module_exit(tps65090_exit);
272 
273 MODULE_DESCRIPTION("TPS65090 core driver");
274 MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
275 MODULE_LICENSE("GPL v2");
276 

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