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16#include <linux/kernel.h>
17#include <linux/device.h>
18#include <linux/module.h>
19#include <linux/platform_device.h>
20#include <linux/init.h>
21#include <linux/i2c.h>
22#include <linux/slab.h>
23#include <linux/regmap.h>
24#include <linux/err.h>
25#include <linux/of.h>
26#include <linux/of_device.h>
27#include <linux/irq.h>
28#include <linux/interrupt.h>
29#include <linux/mutex.h>
30
31#include <linux/mfd/core.h>
32#include <linux/mfd/tps65218.h>
33
34#define TPS65218_PASSWORD_REGS_UNLOCK 0x7D
35
36
37
38
39
40
41
42
43int tps65218_reg_read(struct tps65218 *tps, unsigned int reg,
44 unsigned int *val)
45{
46 return regmap_read(tps->regmap, reg, val);
47}
48EXPORT_SYMBOL_GPL(tps65218_reg_read);
49
50
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52
53
54
55
56
57
58int tps65218_reg_write(struct tps65218 *tps, unsigned int reg,
59 unsigned int val, unsigned int level)
60{
61 int ret;
62 unsigned int xor_reg_val;
63
64 switch (level) {
65 case TPS65218_PROTECT_NONE:
66 return regmap_write(tps->regmap, reg, val);
67 case TPS65218_PROTECT_L1:
68 xor_reg_val = reg ^ TPS65218_PASSWORD_REGS_UNLOCK;
69 ret = regmap_write(tps->regmap, TPS65218_REG_PASSWORD,
70 xor_reg_val);
71 if (ret < 0)
72 return ret;
73
74 return regmap_write(tps->regmap, reg, val);
75 default:
76 return -EINVAL;
77 }
78}
79EXPORT_SYMBOL_GPL(tps65218_reg_write);
80
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88
89
90static int tps65218_update_bits(struct tps65218 *tps, unsigned int reg,
91 unsigned int mask, unsigned int val, unsigned int level)
92{
93 int ret;
94 unsigned int data;
95
96 ret = tps65218_reg_read(tps, reg, &data);
97 if (ret) {
98 dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
99 return ret;
100 }
101
102 data &= ~mask;
103 data |= val & mask;
104
105 mutex_lock(&tps->tps_lock);
106 ret = tps65218_reg_write(tps, reg, data, level);
107 if (ret)
108 dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
109 mutex_unlock(&tps->tps_lock);
110
111 return ret;
112}
113
114int tps65218_set_bits(struct tps65218 *tps, unsigned int reg,
115 unsigned int mask, unsigned int val, unsigned int level)
116{
117 return tps65218_update_bits(tps, reg, mask, val, level);
118}
119EXPORT_SYMBOL_GPL(tps65218_set_bits);
120
121int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg,
122 unsigned int mask, unsigned int level)
123{
124 return tps65218_update_bits(tps, reg, mask, 0, level);
125}
126EXPORT_SYMBOL_GPL(tps65218_clear_bits);
127
128static const struct regmap_range tps65218_yes_ranges[] = {
129 regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2),
130 regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS),
131};
132
133static const struct regmap_access_table tps65218_volatile_table = {
134 .yes_ranges = tps65218_yes_ranges,
135 .n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges),
136};
137
138static struct regmap_config tps65218_regmap_config = {
139 .reg_bits = 8,
140 .val_bits = 8,
141 .cache_type = REGCACHE_RBTREE,
142 .volatile_table = &tps65218_volatile_table,
143};
144
145static const struct regmap_irq tps65218_irqs[] = {
146
147 [TPS65218_PRGC_IRQ] = {
148 .mask = TPS65218_INT1_PRGC,
149 },
150 [TPS65218_CC_AQC_IRQ] = {
151 .mask = TPS65218_INT1_CC_AQC,
152 },
153 [TPS65218_HOT_IRQ] = {
154 .mask = TPS65218_INT1_HOT,
155 },
156 [TPS65218_PB_IRQ] = {
157 .mask = TPS65218_INT1_PB,
158 },
159 [TPS65218_AC_IRQ] = {
160 .mask = TPS65218_INT1_AC,
161 },
162 [TPS65218_VPRG_IRQ] = {
163 .mask = TPS65218_INT1_VPRG,
164 },
165 [TPS65218_INVALID1_IRQ] = {
166 },
167 [TPS65218_INVALID2_IRQ] = {
168 },
169
170 [TPS65218_LS1_I_IRQ] = {
171 .mask = TPS65218_INT2_LS1_I,
172 .reg_offset = 1,
173 },
174 [TPS65218_LS2_I_IRQ] = {
175 .mask = TPS65218_INT2_LS2_I,
176 .reg_offset = 1,
177 },
178 [TPS65218_LS3_I_IRQ] = {
179 .mask = TPS65218_INT2_LS3_I,
180 .reg_offset = 1,
181 },
182 [TPS65218_LS1_F_IRQ] = {
183 .mask = TPS65218_INT2_LS1_F,
184 .reg_offset = 1,
185 },
186 [TPS65218_LS2_F_IRQ] = {
187 .mask = TPS65218_INT2_LS2_F,
188 .reg_offset = 1,
189 },
190 [TPS65218_LS3_F_IRQ] = {
191 .mask = TPS65218_INT2_LS3_F,
192 .reg_offset = 1,
193 },
194 [TPS65218_INVALID3_IRQ] = {
195 },
196 [TPS65218_INVALID4_IRQ] = {
197 },
198};
199
200static struct regmap_irq_chip tps65218_irq_chip = {
201 .name = "tps65218",
202 .irqs = tps65218_irqs,
203 .num_irqs = ARRAY_SIZE(tps65218_irqs),
204
205 .num_regs = 2,
206 .mask_base = TPS65218_REG_INT_MASK1,
207 .status_base = TPS65218_REG_INT1,
208};
209
210static const struct of_device_id of_tps65218_match_table[] = {
211 { .compatible = "ti,tps65218", },
212 {}
213};
214
215static int tps65218_probe(struct i2c_client *client,
216 const struct i2c_device_id *ids)
217{
218 struct tps65218 *tps;
219 const struct of_device_id *match;
220 int ret;
221
222 match = of_match_device(of_tps65218_match_table, &client->dev);
223 if (!match) {
224 dev_err(&client->dev,
225 "Failed to find matching dt id\n");
226 return -EINVAL;
227 }
228
229 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
230 if (!tps)
231 return -ENOMEM;
232
233 i2c_set_clientdata(client, tps);
234 tps->dev = &client->dev;
235 tps->irq = client->irq;
236 tps->regmap = devm_regmap_init_i2c(client, &tps65218_regmap_config);
237 if (IS_ERR(tps->regmap)) {
238 ret = PTR_ERR(tps->regmap);
239 dev_err(tps->dev, "Failed to allocate register map: %d\n",
240 ret);
241 return ret;
242 }
243
244 mutex_init(&tps->tps_lock);
245
246 ret = regmap_add_irq_chip(tps->regmap, tps->irq,
247 IRQF_ONESHOT, 0, &tps65218_irq_chip,
248 &tps->irq_data);
249 if (ret < 0)
250 return ret;
251
252 ret = of_platform_populate(client->dev.of_node, NULL, NULL,
253 &client->dev);
254 if (ret < 0)
255 goto err_irq;
256
257 return 0;
258
259err_irq:
260 regmap_del_irq_chip(tps->irq, tps->irq_data);
261
262 return ret;
263}
264
265static int tps65218_remove(struct i2c_client *client)
266{
267 struct tps65218 *tps = i2c_get_clientdata(client);
268
269 regmap_del_irq_chip(tps->irq, tps->irq_data);
270
271 return 0;
272}
273
274static const struct i2c_device_id tps65218_id_table[] = {
275 { "tps65218", TPS65218 },
276 { },
277};
278MODULE_DEVICE_TABLE(i2c, tps65218_id_table);
279
280static struct i2c_driver tps65218_driver = {
281 .driver = {
282 .name = "tps65218",
283 .owner = THIS_MODULE,
284 .of_match_table = of_tps65218_match_table,
285 },
286 .probe = tps65218_probe,
287 .remove = tps65218_remove,
288 .id_table = tps65218_id_table,
289};
290
291module_i2c_driver(tps65218_driver);
292
293MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
294MODULE_DESCRIPTION("TPS65218 chip family multi-function driver");
295MODULE_LICENSE("GPL v2");
296
