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