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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
41static const 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
49enum tps65090_cells {
50 PMIC = 0,
51 CHARGER = 1,
52};
53
54static 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
66static 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
124static 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 .unmask_base = TPS65090_REG_INTR_MASK,
131};
132
133static bool is_volatile_reg(struct device *dev, unsigned int reg)
134{
135 /* Nearly all registers have status bits mixed in, except a few */
136 switch (reg) {
137 case TPS65090_REG_INTR_MASK:
138 case TPS65090_REG_INTR_MASK2:
139 case TPS65090_REG_CG_CTRL0:
140 case TPS65090_REG_CG_CTRL1:
141 case TPS65090_REG_CG_CTRL2:
142 case TPS65090_REG_CG_CTRL3:
143 case TPS65090_REG_CG_CTRL4:
144 case TPS65090_REG_CG_CTRL5:
145 return false;
146 }
147 return true;
148}
149
150static const struct regmap_config tps65090_regmap_config = {
151 .reg_bits = 8,
152 .val_bits = 8,
153 .max_register = TPS65090_MAX_REG,
154 .num_reg_defaults_raw = TPS65090_NUM_REGS,
155 .cache_type = REGCACHE_RBTREE,
156 .volatile_reg = is_volatile_reg,
157};
158
159#ifdef CONFIG_OF
160static const struct of_device_id tps65090_of_match[] = {
161 { .compatible = "ti,tps65090",},
162 {},
163};
164#endif
165
166static int tps65090_i2c_probe(struct i2c_client *client)
167{
168 struct tps65090_platform_data *pdata = dev_get_platdata(&client->dev);
169 int irq_base = 0;
170 struct tps65090 *tps65090;
171 int ret;
172
173 if (!pdata && !client->dev.of_node) {
174 dev_err(&client->dev,
175 "tps65090 requires platform data or of_node\n");
176 return -EINVAL;
177 }
178
179 if (pdata)
180 irq_base = pdata->irq_base;
181
182 tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
183 if (!tps65090)
184 return -ENOMEM;
185
186 tps65090->dev = &client->dev;
187 i2c_set_clientdata(client, tps65090);
188
189 tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
190 if (IS_ERR(tps65090->rmap)) {
191 ret = PTR_ERR(tps65090->rmap);
192 dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
193 return ret;
194 }
195
196 if (client->irq) {
197 ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
198 IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base,
199 &tps65090_irq_chip, &tps65090->irq_data);
200 if (ret) {
201 dev_err(&client->dev,
202 "IRQ init failed with err: %d\n", ret);
203 return ret;
204 }
205 } else {
206 /* Don't tell children they have an IRQ that'll never fire */
207 tps65090s[CHARGER].num_resources = 0;
208 }
209
210 ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
211 ARRAY_SIZE(tps65090s), NULL,
212 0, regmap_irq_get_domain(tps65090->irq_data));
213 if (ret) {
214 dev_err(&client->dev, "add mfd devices failed with err: %d\n",
215 ret);
216 goto err_irq_exit;
217 }
218
219 return 0;
220
221err_irq_exit:
222 if (client->irq)
223 regmap_del_irq_chip(client->irq, tps65090->irq_data);
224 return ret;
225}
226
227
228static const struct i2c_device_id tps65090_id_table[] = {
229 { "tps65090", 0 },
230 { },
231};
232
233static struct i2c_driver tps65090_driver = {
234 .driver = {
235 .name = "tps65090",
236 .suppress_bind_attrs = true,
237 .of_match_table = of_match_ptr(tps65090_of_match),
238 },
239 .probe_new = tps65090_i2c_probe,
240 .id_table = tps65090_id_table,
241};
242
243static int __init tps65090_init(void)
244{
245 return i2c_add_driver(&tps65090_driver);
246}
247subsys_initcall(tps65090_init);