1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Core driver for TI TPS65090 PMIC family
4 *
5 * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
6 *
7 * Author: Venu Byravarasu <vbyravarasu@nvidia.com>
8 */
9
10 #include <linux/interrupt.h>
11 #include <linux/irq.h>
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/mutex.h>
15 #include <linux/slab.h>
16 #include <linux/i2c.h>
17 #include <linux/mfd/core.h>
18 #include <linux/mfd/tps65090.h>
19 #include <linux/of.h>
20 #include <linux/of_device.h>
21 #include <linux/err.h>
22
23 #define NUM_INT_REG 2
24
25 #define TPS65090_INT1_MASK_VAC_STATUS_CHANGE 1
26 #define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE 2
27 #define TPS65090_INT1_MASK_BAT_STATUS_CHANGE 3
28 #define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE 4
29 #define TPS65090_INT1_MASK_CHARGING_COMPLETE 5
30 #define TPS65090_INT1_MASK_OVERLOAD_DCDC1 6
31 #define TPS65090_INT1_MASK_OVERLOAD_DCDC2 7
32 #define TPS65090_INT2_MASK_OVERLOAD_DCDC3 0
33 #define TPS65090_INT2_MASK_OVERLOAD_FET1 1
34 #define TPS65090_INT2_MASK_OVERLOAD_FET2 2
35 #define TPS65090_INT2_MASK_OVERLOAD_FET3 3
36 #define TPS65090_INT2_MASK_OVERLOAD_FET4 4
37 #define TPS65090_INT2_MASK_OVERLOAD_FET5 5
38 #define TPS65090_INT2_MASK_OVERLOAD_FET6 6
39 #define TPS65090_INT2_MASK_OVERLOAD_FET7 7
40
41 static struct resource charger_resources[] = {
42 {
43 .start = TPS65090_IRQ_VAC_STATUS_CHANGE,
44 .end = TPS65090_IRQ_VAC_STATUS_CHANGE,
45 .flags = IORESOURCE_IRQ,
46 }
47 };
48
49 enum tps65090_cells {
50 PMIC = 0,
51 CHARGER = 1,
52 };
53
54 static struct mfd_cell tps65090s[] = {
55 [PMIC] = {
56 .name = "tps65090-pmic",
57 },
58 [CHARGER] = {
59 .name = "tps65090-charger",
60 .num_resources = ARRAY_SIZE(charger_resources),
61 .resources = &charger_resources[0],
62 .of_compatible = "ti,tps65090-charger",
63 },
64 };
65
66 static const struct regmap_irq tps65090_irqs[] = {
67 /* INT1 IRQs*/
68 [TPS65090_IRQ_VAC_STATUS_CHANGE] = {
69 .mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,
70 },
71 [TPS65090_IRQ_VSYS_STATUS_CHANGE] = {
72 .mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,
73 },
74 [TPS65090_IRQ_BAT_STATUS_CHANGE] = {
75 .mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,
76 },
77 [TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {
78 .mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,
79 },
80 [TPS65090_IRQ_CHARGING_COMPLETE] = {
81 .mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,
82 },
83 [TPS65090_IRQ_OVERLOAD_DCDC1] = {
84 .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,
85 },
86 [TPS65090_IRQ_OVERLOAD_DCDC2] = {
87 .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,
88 },
89 /* INT2 IRQs*/
90 [TPS65090_IRQ_OVERLOAD_DCDC3] = {
91 .reg_offset = 1,
92 .mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,
93 },
94 [TPS65090_IRQ_OVERLOAD_FET1] = {
95 .reg_offset = 1,
96 .mask = TPS65090_INT2_MASK_OVERLOAD_FET1,
97 },
98 [TPS65090_IRQ_OVERLOAD_FET2] = {
99 .reg_offset = 1,
100 .mask = TPS65090_INT2_MASK_OVERLOAD_FET2,
101 },
102 [TPS65090_IRQ_OVERLOAD_FET3] = {
103 .reg_offset = 1,
104 .mask = TPS65090_INT2_MASK_OVERLOAD_FET3,
105 },
106 [TPS65090_IRQ_OVERLOAD_FET4] = {
107 .reg_offset = 1,
108 .mask = TPS65090_INT2_MASK_OVERLOAD_FET4,
109 },
110 [TPS65090_IRQ_OVERLOAD_FET5] = {
111 .reg_offset = 1,
112 .mask = TPS65090_INT2_MASK_OVERLOAD_FET5,
113 },
114 [TPS65090_IRQ_OVERLOAD_FET6] = {
115 .reg_offset = 1,
116 .mask = TPS65090_INT2_MASK_OVERLOAD_FET6,
117 },
118 [TPS65090_IRQ_OVERLOAD_FET7] = {
119 .reg_offset = 1,
120 .mask = TPS65090_INT2_MASK_OVERLOAD_FET7,
121 },
122 };
123
124 static struct regmap_irq_chip tps65090_irq_chip = {
125 .name = "tps65090",
126 .irqs = tps65090_irqs,
127 .num_irqs = ARRAY_SIZE(tps65090_irqs),
128 .num_regs = NUM_INT_REG,
129 .status_base = TPS65090_REG_INTR_STS,
130 .mask_base = TPS65090_REG_INTR_MASK,
131 .mask_invert = true,
132 };
133
is_volatile_reg(struct device * dev,unsigned int reg)134 static bool is_volatile_reg(struct device *dev, unsigned int reg)
135 {
136 /* Nearly all registers have status bits mixed in, except a few */
137 switch (reg) {
138 case TPS65090_REG_INTR_MASK:
139 case TPS65090_REG_INTR_MASK2:
140 case TPS65090_REG_CG_CTRL0:
141 case TPS65090_REG_CG_CTRL1:
142 case TPS65090_REG_CG_CTRL2:
143 case TPS65090_REG_CG_CTRL3:
144 case TPS65090_REG_CG_CTRL4:
145 case TPS65090_REG_CG_CTRL5:
146 return false;
147 }
148 return true;
149 }
150
151 static const struct regmap_config tps65090_regmap_config = {
152 .reg_bits = 8,
153 .val_bits = 8,
154 .max_register = TPS65090_MAX_REG,
155 .num_reg_defaults_raw = TPS65090_NUM_REGS,
156 .cache_type = REGCACHE_RBTREE,
157 .volatile_reg = is_volatile_reg,
158 };
159
160 #ifdef CONFIG_OF
161 static const struct of_device_id tps65090_of_match[] = {
162 { .compatible = "ti,tps65090",},
163 {},
164 };
165 #endif
166
tps65090_i2c_probe(struct i2c_client * client,const struct i2c_device_id * id)167 static int tps65090_i2c_probe(struct i2c_client *client,
168 const struct i2c_device_id *id)
169 {
170 struct tps65090_platform_data *pdata = dev_get_platdata(&client->dev);
171 int irq_base = 0;
172 struct tps65090 *tps65090;
173 int ret;
174
175 if (!pdata && !client->dev.of_node) {
176 dev_err(&client->dev,
177 "tps65090 requires platform data or of_node\n");
178 return -EINVAL;
179 }
180
181 if (pdata)
182 irq_base = pdata->irq_base;
183
184 tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
185 if (!tps65090)
186 return -ENOMEM;
187
188 tps65090->dev = &client->dev;
189 i2c_set_clientdata(client, tps65090);
190
191 tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
192 if (IS_ERR(tps65090->rmap)) {
193 ret = PTR_ERR(tps65090->rmap);
194 dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
195 return ret;
196 }
197
198 if (client->irq) {
199 ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
200 IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base,
201 &tps65090_irq_chip, &tps65090->irq_data);
202 if (ret) {
203 dev_err(&client->dev,
204 "IRQ init failed with err: %d\n", ret);
205 return ret;
206 }
207 } else {
208 /* Don't tell children they have an IRQ that'll never fire */
209 tps65090s[CHARGER].num_resources = 0;
210 }
211
212 ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
213 ARRAY_SIZE(tps65090s), NULL,
214 0, regmap_irq_get_domain(tps65090->irq_data));
215 if (ret) {
216 dev_err(&client->dev, "add mfd devices failed with err: %d\n",
217 ret);
218 goto err_irq_exit;
219 }
220
221 return 0;
222
223 err_irq_exit:
224 if (client->irq)
225 regmap_del_irq_chip(client->irq, tps65090->irq_data);
226 return ret;
227 }
228
229
230 static const struct i2c_device_id tps65090_id_table[] = {
231 { "tps65090", 0 },
232 { },
233 };
234
235 static struct i2c_driver tps65090_driver = {
236 .driver = {
237 .name = "tps65090",
238 .suppress_bind_attrs = true,
239 .of_match_table = of_match_ptr(tps65090_of_match),
240 },
241 .probe = tps65090_i2c_probe,
242 .id_table = tps65090_id_table,
243 };
244
tps65090_init(void)245 static int __init tps65090_init(void)
246 {
247 return i2c_add_driver(&tps65090_driver);
248 }
249 subsys_initcall(tps65090_init);
250