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 | |
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_MAPLE, |
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 | |
165 | static int tps65090_i2c_probe(struct i2c_client *client) |
166 | { |
167 | struct tps65090_platform_data *pdata = dev_get_platdata(dev: &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(dev: &client->dev, size: sizeof(*tps65090), GFP_KERNEL); |
182 | if (!tps65090) |
183 | return -ENOMEM; |
184 | |
185 | tps65090->dev = &client->dev; |
186 | i2c_set_clientdata(client, data: tps65090); |
187 | |
188 | tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config); |
189 | if (IS_ERR(ptr: tps65090->rmap)) { |
190 | ret = PTR_ERR(ptr: 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(map: tps65090->rmap, irq: client->irq, |
197 | IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base, |
198 | chip: &tps65090_irq_chip, data: &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(parent: tps65090->dev, id: -1, cells: tps65090s, |
210 | ARRAY_SIZE(tps65090s), NULL, |
211 | irq_base: 0, irq_domain: regmap_irq_get_domain(data: 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(irq: client->irq, data: 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 | |
242 | static int __init tps65090_init(void) |
243 | { |
244 | return i2c_add_driver(&tps65090_driver); |
245 | } |
246 | subsys_initcall(tps65090_init); |
247 | |