xref: /linux/drivers/mfd/max77693.c (revision cdd5b5a9761fd66d17586e4f4ba6588c70e640ea)
1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // max77693.c - mfd core driver for the MAX 77693
4 //
5 // Copyright (C) 2012 Samsung Electronics
6 // SangYoung Son <hello.son@samsung.com>
7 //
8 // This program is not provided / owned by Maxim Integrated Products.
9 //
10 // This driver is based on max8997.c
11 
12 #include <linux/module.h>
13 #include <linux/slab.h>
14 #include <linux/i2c.h>
15 #include <linux/err.h>
16 #include <linux/interrupt.h>
17 #include <linux/of.h>
18 #include <linux/pm_runtime.h>
19 #include <linux/mutex.h>
20 #include <linux/mfd/core.h>
21 #include <linux/mfd/max77693.h>
22 #include <linux/mfd/max77693-common.h>
23 #include <linux/mfd/max77693-private.h>
24 #include <linux/regulator/machine.h>
25 #include <linux/regmap.h>
26 
27 #define I2C_ADDR_PMIC	(0xCC >> 1)	/* Charger, Flash LED */
28 #define I2C_ADDR_MUIC	(0x4A >> 1)
29 #define I2C_ADDR_HAPTIC	(0x90 >> 1)
30 
31 static const struct mfd_cell max77693_devs[] = {
32 	{ .name = "max77693-pmic", },
33 	{
34 		.name = "max77693-charger",
35 		.of_compatible = "maxim,max77693-charger",
36 	},
37 	{
38 		.name = "max77693-muic",
39 		.of_compatible = "maxim,max77693-muic",
40 	},
41 	{
42 		.name = "max77693-haptic",
43 		.of_compatible = "maxim,max77693-haptic",
44 	},
45 	{
46 		.name = "max77693-led",
47 		.of_compatible = "maxim,max77693-led",
48 	},
49 };
50 
51 static const struct regmap_config max77693_regmap_config = {
52 	.reg_bits = 8,
53 	.val_bits = 8,
54 	.max_register = MAX77693_PMIC_REG_END,
55 };
56 
57 static const struct regmap_irq max77693_led_irqs[] = {
58 	{ .mask = LED_IRQ_FLED2_OPEN,  },
59 	{ .mask = LED_IRQ_FLED2_SHORT, },
60 	{ .mask = LED_IRQ_FLED1_OPEN,  },
61 	{ .mask = LED_IRQ_FLED1_SHORT, },
62 	{ .mask = LED_IRQ_MAX_FLASH,   },
63 };
64 
65 static const struct regmap_irq_chip max77693_led_irq_chip = {
66 	.name			= "max77693-led",
67 	.status_base		= MAX77693_LED_REG_FLASH_INT,
68 	.mask_base		= MAX77693_LED_REG_FLASH_INT_MASK,
69 	.num_regs		= 1,
70 	.irqs			= max77693_led_irqs,
71 	.num_irqs		= ARRAY_SIZE(max77693_led_irqs),
72 };
73 
74 static const struct regmap_irq max77693_topsys_irqs[] = {
75 	{ .mask = TOPSYS_IRQ_T120C_INT,  },
76 	{ .mask = TOPSYS_IRQ_T140C_INT,  },
77 	{ .mask = TOPSYS_IRQ_LOWSYS_INT, },
78 };
79 
80 static const struct regmap_irq_chip max77693_topsys_irq_chip = {
81 	.name			= "max77693-topsys",
82 	.status_base		= MAX77693_PMIC_REG_TOPSYS_INT,
83 	.mask_base		= MAX77693_PMIC_REG_TOPSYS_INT_MASK,
84 	.num_regs		= 1,
85 	.irqs			= max77693_topsys_irqs,
86 	.num_irqs		= ARRAY_SIZE(max77693_topsys_irqs),
87 };
88 
89 static const struct regmap_irq max77693_charger_irqs[] = {
90 	{ .mask = CHG_IRQ_BYP_I,   },
91 	{ .mask = CHG_IRQ_THM_I,   },
92 	{ .mask = CHG_IRQ_BAT_I,   },
93 	{ .mask = CHG_IRQ_CHG_I,   },
94 	{ .mask = CHG_IRQ_CHGIN_I, },
95 };
96 
97 static const struct regmap_irq_chip max77693_charger_irq_chip = {
98 	.name			= "max77693-charger",
99 	.status_base		= MAX77693_CHG_REG_CHG_INT,
100 	.mask_base		= MAX77693_CHG_REG_CHG_INT_MASK,
101 	.num_regs		= 1,
102 	.irqs			= max77693_charger_irqs,
103 	.num_irqs		= ARRAY_SIZE(max77693_charger_irqs),
104 };
105 
106 static const struct regmap_config max77693_regmap_muic_config = {
107 	.reg_bits = 8,
108 	.val_bits = 8,
109 	.max_register = MAX77693_MUIC_REG_END,
110 };
111 
112 static const struct regmap_irq max77693_muic_irqs[] = {
113 	{ .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC,		},
114 	{ .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW,	},
115 	{ .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR,	},
116 	{ .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K,		},
117 
118 	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP,	},
119 	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN,	},
120 	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR,	},
121 	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP,		},
122 	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT,	},
123 	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM,		},
124 
125 	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC,		},
126 	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC,		},
127 	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP,		},
128 	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR,	},
129 	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED,	},
130 	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET,	},
131 };
132 
133 static const struct regmap_irq_chip max77693_muic_irq_chip = {
134 	.name			= "max77693-muic",
135 	.status_base		= MAX77693_MUIC_REG_INT1,
136 	.unmask_base		= MAX77693_MUIC_REG_INTMASK1,
137 	.num_regs		= 3,
138 	.irqs			= max77693_muic_irqs,
139 	.num_irqs		= ARRAY_SIZE(max77693_muic_irqs),
140 };
141 
142 static const struct regmap_config max77693_regmap_haptic_config = {
143 	.reg_bits = 8,
144 	.val_bits = 8,
145 	.max_register = MAX77693_HAPTIC_REG_END,
146 };
147 
max77693_i2c_probe(struct i2c_client * i2c)148 static int max77693_i2c_probe(struct i2c_client *i2c)
149 {
150 	const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
151 	struct max77693_dev *max77693;
152 	unsigned int reg_data;
153 	int ret = 0;
154 
155 	max77693 = devm_kzalloc(&i2c->dev,
156 			sizeof(struct max77693_dev), GFP_KERNEL);
157 	if (max77693 == NULL)
158 		return -ENOMEM;
159 
160 	i2c_set_clientdata(i2c, max77693);
161 	max77693->dev = &i2c->dev;
162 	max77693->i2c = i2c;
163 	max77693->irq = i2c->irq;
164 	max77693->type = id->driver_data;
165 
166 	max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
167 	if (IS_ERR(max77693->regmap)) {
168 		ret = PTR_ERR(max77693->regmap);
169 		dev_err(max77693->dev, "failed to allocate register map: %d\n",
170 				ret);
171 		return ret;
172 	}
173 
174 	ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
175 				&reg_data);
176 	if (ret < 0) {
177 		dev_err(max77693->dev, "device not found on this channel\n");
178 		return ret;
179 	} else
180 		dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
181 
182 	max77693->i2c_muic = i2c_new_dummy_device(i2c->adapter, I2C_ADDR_MUIC);
183 	if (IS_ERR(max77693->i2c_muic)) {
184 		dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
185 		return PTR_ERR(max77693->i2c_muic);
186 	}
187 	i2c_set_clientdata(max77693->i2c_muic, max77693);
188 
189 	max77693->i2c_haptic = i2c_new_dummy_device(i2c->adapter, I2C_ADDR_HAPTIC);
190 	if (IS_ERR(max77693->i2c_haptic)) {
191 		dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
192 		ret = PTR_ERR(max77693->i2c_haptic);
193 		goto err_i2c_haptic;
194 	}
195 	i2c_set_clientdata(max77693->i2c_haptic, max77693);
196 
197 	max77693->regmap_haptic = devm_regmap_init_i2c(max77693->i2c_haptic,
198 					&max77693_regmap_haptic_config);
199 	if (IS_ERR(max77693->regmap_haptic)) {
200 		ret = PTR_ERR(max77693->regmap_haptic);
201 		dev_err(max77693->dev,
202 			"failed to initialize haptic register map: %d\n", ret);
203 		goto err_regmap;
204 	}
205 
206 	/*
207 	 * Initialize register map for MUIC device because use regmap-muic
208 	 * instance of MUIC device when irq of max77693 is initialized
209 	 * before call max77693-muic probe() function.
210 	 */
211 	max77693->regmap_muic = devm_regmap_init_i2c(max77693->i2c_muic,
212 					 &max77693_regmap_muic_config);
213 	if (IS_ERR(max77693->regmap_muic)) {
214 		ret = PTR_ERR(max77693->regmap_muic);
215 		dev_err(max77693->dev,
216 			"failed to allocate register map: %d\n", ret);
217 		goto err_regmap;
218 	}
219 
220 	ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
221 				IRQF_ONESHOT | IRQF_SHARED, 0,
222 				&max77693_led_irq_chip,
223 				&max77693->irq_data_led);
224 	if (ret) {
225 		dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
226 		goto err_regmap;
227 	}
228 
229 	ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
230 				IRQF_ONESHOT | IRQF_SHARED, 0,
231 				&max77693_topsys_irq_chip,
232 				&max77693->irq_data_topsys);
233 	if (ret) {
234 		dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
235 		goto err_irq_topsys;
236 	}
237 
238 	ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
239 				IRQF_ONESHOT | IRQF_SHARED, 0,
240 				&max77693_charger_irq_chip,
241 				&max77693->irq_data_chg);
242 	if (ret) {
243 		dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
244 		goto err_irq_charger;
245 	}
246 
247 	ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq,
248 				IRQF_ONESHOT | IRQF_SHARED, 0,
249 				&max77693_muic_irq_chip,
250 				&max77693->irq_data_muic);
251 	if (ret) {
252 		dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
253 		goto err_irq_muic;
254 	}
255 
256 	/* Unmask interrupts from all blocks in interrupt source register */
257 	ret = regmap_update_bits(max77693->regmap,
258 				MAX77693_PMIC_REG_INTSRC_MASK,
259 				SRC_IRQ_ALL, (unsigned int)~SRC_IRQ_ALL);
260 	if (ret < 0) {
261 		dev_err(max77693->dev,
262 			"Could not unmask interrupts in INTSRC: %d\n",
263 			ret);
264 		goto err_intsrc;
265 	}
266 
267 	pm_runtime_set_active(max77693->dev);
268 
269 	ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
270 			      ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
271 	if (ret < 0)
272 		goto err_mfd;
273 
274 	return ret;
275 
276 err_mfd:
277 	mfd_remove_devices(max77693->dev);
278 err_intsrc:
279 	regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
280 err_irq_muic:
281 	regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg);
282 err_irq_charger:
283 	regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
284 err_irq_topsys:
285 	regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
286 err_regmap:
287 	i2c_unregister_device(max77693->i2c_haptic);
288 err_i2c_haptic:
289 	i2c_unregister_device(max77693->i2c_muic);
290 	return ret;
291 }
292 
max77693_i2c_remove(struct i2c_client * i2c)293 static void max77693_i2c_remove(struct i2c_client *i2c)
294 {
295 	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
296 
297 	mfd_remove_devices(max77693->dev);
298 
299 	regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
300 	regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg);
301 	regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
302 	regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
303 
304 	i2c_unregister_device(max77693->i2c_muic);
305 	i2c_unregister_device(max77693->i2c_haptic);
306 }
307 
308 static const struct i2c_device_id max77693_i2c_id[] = {
309 	{ "max77693", TYPE_MAX77693 },
310 	{ }
311 };
312 MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
313 
max77693_suspend(struct device * dev)314 static int max77693_suspend(struct device *dev)
315 {
316 	struct i2c_client *i2c = to_i2c_client(dev);
317 	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
318 
319 	if (device_may_wakeup(dev)) {
320 		enable_irq_wake(max77693->irq);
321 		disable_irq(max77693->irq);
322 	}
323 
324 	return 0;
325 }
326 
max77693_resume(struct device * dev)327 static int max77693_resume(struct device *dev)
328 {
329 	struct i2c_client *i2c = to_i2c_client(dev);
330 	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
331 
332 	if (device_may_wakeup(dev)) {
333 		disable_irq_wake(max77693->irq);
334 		enable_irq(max77693->irq);
335 	}
336 
337 	return 0;
338 }
339 
340 static const struct dev_pm_ops max77693_pm = {
341 	.suspend = max77693_suspend,
342 	.resume = max77693_resume,
343 };
344 
345 #ifdef CONFIG_OF
346 static const struct of_device_id max77693_dt_match[] = {
347 	{ .compatible = "maxim,max77693" },
348 	{},
349 };
350 MODULE_DEVICE_TABLE(of, max77693_dt_match);
351 #endif
352 
353 static struct i2c_driver max77693_i2c_driver = {
354 	.driver = {
355 		   .name = "max77693",
356 		   .pm = &max77693_pm,
357 		   .of_match_table = of_match_ptr(max77693_dt_match),
358 	},
359 	.probe = max77693_i2c_probe,
360 	.remove = max77693_i2c_remove,
361 	.id_table = max77693_i2c_id,
362 };
363 
364 module_i2c_driver(max77693_i2c_driver);
365 
366 MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
367 MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
368 MODULE_LICENSE("GPL");
369