180503b23SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
2a5736e0bSMichael Hennerich /*
3a5736e0bSMichael Hennerich * Base driver for Analog Devices ADP5520/ADP5501 MFD PMICs
4a5736e0bSMichael Hennerich * LCD Backlight: drivers/video/backlight/adp5520_bl
5a5736e0bSMichael Hennerich * LEDs : drivers/led/leds-adp5520
6a5736e0bSMichael Hennerich * GPIO : drivers/gpio/adp5520-gpio (ADP5520 only)
7a5736e0bSMichael Hennerich * Keys : drivers/input/keyboard/adp5520-keys (ADP5520 only)
8a5736e0bSMichael Hennerich *
9a5736e0bSMichael Hennerich * Copyright 2009 Analog Devices Inc.
10a5736e0bSMichael Hennerich *
116b09274bSPaul Gortmaker * Author: Michael Hennerich <michael.hennerich@analog.com>
126b09274bSPaul Gortmaker *
13a5736e0bSMichael Hennerich * Derived from da903x:
14a5736e0bSMichael Hennerich * Copyright (C) 2008 Compulab, Ltd.
15a5736e0bSMichael Hennerich * Mike Rapoport <mike@compulab.co.il>
16a5736e0bSMichael Hennerich *
17a5736e0bSMichael Hennerich * Copyright (C) 2006-2008 Marvell International Ltd.
18a5736e0bSMichael Hennerich * Eric Miao <eric.miao@marvell.com>
19a5736e0bSMichael Hennerich */
20a5736e0bSMichael Hennerich
21a5736e0bSMichael Hennerich #include <linux/kernel.h>
226b09274bSPaul Gortmaker #include <linux/init.h>
23a5736e0bSMichael Hennerich #include <linux/platform_device.h>
245a0e3ad6STejun Heo #include <linux/slab.h>
25a5736e0bSMichael Hennerich #include <linux/interrupt.h>
26a5736e0bSMichael Hennerich #include <linux/irq.h>
27a5736e0bSMichael Hennerich #include <linux/err.h>
28a5736e0bSMichael Hennerich #include <linux/i2c.h>
29a5736e0bSMichael Hennerich
30a5736e0bSMichael Hennerich #include <linux/mfd/adp5520.h>
31a5736e0bSMichael Hennerich
32a5736e0bSMichael Hennerich struct adp5520_chip {
33a5736e0bSMichael Hennerich struct i2c_client *client;
34a5736e0bSMichael Hennerich struct device *dev;
35a5736e0bSMichael Hennerich struct mutex lock;
36a5736e0bSMichael Hennerich struct blocking_notifier_head notifier_list;
37a5736e0bSMichael Hennerich int irq;
38a5736e0bSMichael Hennerich unsigned long id;
39c6cc25fdSLars-Peter Clausen uint8_t mode;
40a5736e0bSMichael Hennerich };
41a5736e0bSMichael Hennerich
__adp5520_read(struct i2c_client * client,int reg,uint8_t * val)42a5736e0bSMichael Hennerich static int __adp5520_read(struct i2c_client *client,
43a5736e0bSMichael Hennerich int reg, uint8_t *val)
44a5736e0bSMichael Hennerich {
45a5736e0bSMichael Hennerich int ret;
46a5736e0bSMichael Hennerich
47a5736e0bSMichael Hennerich ret = i2c_smbus_read_byte_data(client, reg);
48a5736e0bSMichael Hennerich if (ret < 0) {
49a5736e0bSMichael Hennerich dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
50a5736e0bSMichael Hennerich return ret;
51a5736e0bSMichael Hennerich }
52a5736e0bSMichael Hennerich
53a5736e0bSMichael Hennerich *val = (uint8_t)ret;
54a5736e0bSMichael Hennerich return 0;
55a5736e0bSMichael Hennerich }
56a5736e0bSMichael Hennerich
__adp5520_write(struct i2c_client * client,int reg,uint8_t val)57a5736e0bSMichael Hennerich static int __adp5520_write(struct i2c_client *client,
58a5736e0bSMichael Hennerich int reg, uint8_t val)
59a5736e0bSMichael Hennerich {
60a5736e0bSMichael Hennerich int ret;
61a5736e0bSMichael Hennerich
62a5736e0bSMichael Hennerich ret = i2c_smbus_write_byte_data(client, reg, val);
63a5736e0bSMichael Hennerich if (ret < 0) {
64a5736e0bSMichael Hennerich dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n",
65a5736e0bSMichael Hennerich val, reg);
66a5736e0bSMichael Hennerich return ret;
67a5736e0bSMichael Hennerich }
68a5736e0bSMichael Hennerich return 0;
69a5736e0bSMichael Hennerich }
70a5736e0bSMichael Hennerich
__adp5520_ack_bits(struct i2c_client * client,int reg,uint8_t bit_mask)714e8b7026SMark Brown static int __adp5520_ack_bits(struct i2c_client *client, int reg,
724e8b7026SMark Brown uint8_t bit_mask)
73a5736e0bSMichael Hennerich {
74a5736e0bSMichael Hennerich struct adp5520_chip *chip = i2c_get_clientdata(client);
75a5736e0bSMichael Hennerich uint8_t reg_val;
76a5736e0bSMichael Hennerich int ret;
77a5736e0bSMichael Hennerich
78a5736e0bSMichael Hennerich mutex_lock(&chip->lock);
79a5736e0bSMichael Hennerich
80a5736e0bSMichael Hennerich ret = __adp5520_read(client, reg, ®_val);
81a5736e0bSMichael Hennerich
82a5736e0bSMichael Hennerich if (!ret) {
83a5736e0bSMichael Hennerich reg_val |= bit_mask;
84a5736e0bSMichael Hennerich ret = __adp5520_write(client, reg, reg_val);
85a5736e0bSMichael Hennerich }
86a5736e0bSMichael Hennerich
87a5736e0bSMichael Hennerich mutex_unlock(&chip->lock);
88a5736e0bSMichael Hennerich return ret;
89a5736e0bSMichael Hennerich }
90a5736e0bSMichael Hennerich
adp5520_write(struct device * dev,int reg,uint8_t val)91a5736e0bSMichael Hennerich int adp5520_write(struct device *dev, int reg, uint8_t val)
92a5736e0bSMichael Hennerich {
93a5736e0bSMichael Hennerich return __adp5520_write(to_i2c_client(dev), reg, val);
94a5736e0bSMichael Hennerich }
95a5736e0bSMichael Hennerich EXPORT_SYMBOL_GPL(adp5520_write);
96a5736e0bSMichael Hennerich
adp5520_read(struct device * dev,int reg,uint8_t * val)97a5736e0bSMichael Hennerich int adp5520_read(struct device *dev, int reg, uint8_t *val)
98a5736e0bSMichael Hennerich {
99a5736e0bSMichael Hennerich return __adp5520_read(to_i2c_client(dev), reg, val);
100a5736e0bSMichael Hennerich }
101a5736e0bSMichael Hennerich EXPORT_SYMBOL_GPL(adp5520_read);
102a5736e0bSMichael Hennerich
adp5520_set_bits(struct device * dev,int reg,uint8_t bit_mask)103a5736e0bSMichael Hennerich int adp5520_set_bits(struct device *dev, int reg, uint8_t bit_mask)
104a5736e0bSMichael Hennerich {
105a5736e0bSMichael Hennerich struct adp5520_chip *chip = dev_get_drvdata(dev);
106a5736e0bSMichael Hennerich uint8_t reg_val;
107a5736e0bSMichael Hennerich int ret;
108a5736e0bSMichael Hennerich
109a5736e0bSMichael Hennerich mutex_lock(&chip->lock);
110a5736e0bSMichael Hennerich
111a5736e0bSMichael Hennerich ret = __adp5520_read(chip->client, reg, ®_val);
112a5736e0bSMichael Hennerich
113890c98e3SAxel Lin if (!ret && ((reg_val & bit_mask) != bit_mask)) {
114a5736e0bSMichael Hennerich reg_val |= bit_mask;
115a5736e0bSMichael Hennerich ret = __adp5520_write(chip->client, reg, reg_val);
116a5736e0bSMichael Hennerich }
117a5736e0bSMichael Hennerich
118a5736e0bSMichael Hennerich mutex_unlock(&chip->lock);
119a5736e0bSMichael Hennerich return ret;
120a5736e0bSMichael Hennerich }
121a5736e0bSMichael Hennerich EXPORT_SYMBOL_GPL(adp5520_set_bits);
122a5736e0bSMichael Hennerich
adp5520_clr_bits(struct device * dev,int reg,uint8_t bit_mask)123a5736e0bSMichael Hennerich int adp5520_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
124a5736e0bSMichael Hennerich {
125a5736e0bSMichael Hennerich struct adp5520_chip *chip = dev_get_drvdata(dev);
126a5736e0bSMichael Hennerich uint8_t reg_val;
127a5736e0bSMichael Hennerich int ret;
128a5736e0bSMichael Hennerich
129a5736e0bSMichael Hennerich mutex_lock(&chip->lock);
130a5736e0bSMichael Hennerich
131a5736e0bSMichael Hennerich ret = __adp5520_read(chip->client, reg, ®_val);
132a5736e0bSMichael Hennerich
133a5736e0bSMichael Hennerich if (!ret && (reg_val & bit_mask)) {
134a5736e0bSMichael Hennerich reg_val &= ~bit_mask;
135a5736e0bSMichael Hennerich ret = __adp5520_write(chip->client, reg, reg_val);
136a5736e0bSMichael Hennerich }
137a5736e0bSMichael Hennerich
138a5736e0bSMichael Hennerich mutex_unlock(&chip->lock);
139a5736e0bSMichael Hennerich return ret;
140a5736e0bSMichael Hennerich }
141a5736e0bSMichael Hennerich EXPORT_SYMBOL_GPL(adp5520_clr_bits);
142a5736e0bSMichael Hennerich
adp5520_register_notifier(struct device * dev,struct notifier_block * nb,unsigned int events)143a5736e0bSMichael Hennerich int adp5520_register_notifier(struct device *dev, struct notifier_block *nb,
144a5736e0bSMichael Hennerich unsigned int events)
145a5736e0bSMichael Hennerich {
146a5736e0bSMichael Hennerich struct adp5520_chip *chip = dev_get_drvdata(dev);
147a5736e0bSMichael Hennerich
148a5736e0bSMichael Hennerich if (chip->irq) {
149a5736e0bSMichael Hennerich adp5520_set_bits(chip->dev, ADP5520_INTERRUPT_ENABLE,
150a5736e0bSMichael Hennerich events & (ADP5520_KP_IEN | ADP5520_KR_IEN |
151a5736e0bSMichael Hennerich ADP5520_OVP_IEN | ADP5520_CMPR_IEN));
152a5736e0bSMichael Hennerich
153a5736e0bSMichael Hennerich return blocking_notifier_chain_register(&chip->notifier_list,
154a5736e0bSMichael Hennerich nb);
155a5736e0bSMichael Hennerich }
156a5736e0bSMichael Hennerich
157a5736e0bSMichael Hennerich return -ENODEV;
158a5736e0bSMichael Hennerich }
159a5736e0bSMichael Hennerich EXPORT_SYMBOL_GPL(adp5520_register_notifier);
160a5736e0bSMichael Hennerich
adp5520_unregister_notifier(struct device * dev,struct notifier_block * nb,unsigned int events)161a5736e0bSMichael Hennerich int adp5520_unregister_notifier(struct device *dev, struct notifier_block *nb,
162a5736e0bSMichael Hennerich unsigned int events)
163a5736e0bSMichael Hennerich {
164a5736e0bSMichael Hennerich struct adp5520_chip *chip = dev_get_drvdata(dev);
165a5736e0bSMichael Hennerich
166a5736e0bSMichael Hennerich adp5520_clr_bits(chip->dev, ADP5520_INTERRUPT_ENABLE,
167a5736e0bSMichael Hennerich events & (ADP5520_KP_IEN | ADP5520_KR_IEN |
168a5736e0bSMichael Hennerich ADP5520_OVP_IEN | ADP5520_CMPR_IEN));
169a5736e0bSMichael Hennerich
170a5736e0bSMichael Hennerich return blocking_notifier_chain_unregister(&chip->notifier_list, nb);
171a5736e0bSMichael Hennerich }
172a5736e0bSMichael Hennerich EXPORT_SYMBOL_GPL(adp5520_unregister_notifier);
173a5736e0bSMichael Hennerich
adp5520_irq_thread(int irq,void * data)174a5736e0bSMichael Hennerich static irqreturn_t adp5520_irq_thread(int irq, void *data)
175a5736e0bSMichael Hennerich {
176a5736e0bSMichael Hennerich struct adp5520_chip *chip = data;
177a5736e0bSMichael Hennerich unsigned int events;
178a5736e0bSMichael Hennerich uint8_t reg_val;
179a5736e0bSMichael Hennerich int ret;
180a5736e0bSMichael Hennerich
181a5736e0bSMichael Hennerich ret = __adp5520_read(chip->client, ADP5520_MODE_STATUS, ®_val);
182a5736e0bSMichael Hennerich if (ret)
183a5736e0bSMichael Hennerich goto out;
184a5736e0bSMichael Hennerich
185a5736e0bSMichael Hennerich events = reg_val & (ADP5520_OVP_INT | ADP5520_CMPR_INT |
186a5736e0bSMichael Hennerich ADP5520_GPI_INT | ADP5520_KR_INT | ADP5520_KP_INT);
187a5736e0bSMichael Hennerich
188a5736e0bSMichael Hennerich blocking_notifier_call_chain(&chip->notifier_list, events, NULL);
189a5736e0bSMichael Hennerich /* ACK, Sticky bits are W1C */
190a5736e0bSMichael Hennerich __adp5520_ack_bits(chip->client, ADP5520_MODE_STATUS, events);
191a5736e0bSMichael Hennerich
192a5736e0bSMichael Hennerich out:
193a5736e0bSMichael Hennerich return IRQ_HANDLED;
194a5736e0bSMichael Hennerich }
195a5736e0bSMichael Hennerich
__remove_subdev(struct device * dev,void * unused)196a5736e0bSMichael Hennerich static int __remove_subdev(struct device *dev, void *unused)
197a5736e0bSMichael Hennerich {
198a5736e0bSMichael Hennerich platform_device_unregister(to_platform_device(dev));
199a5736e0bSMichael Hennerich return 0;
200a5736e0bSMichael Hennerich }
201a5736e0bSMichael Hennerich
adp5520_remove_subdevs(struct adp5520_chip * chip)202a5736e0bSMichael Hennerich static int adp5520_remove_subdevs(struct adp5520_chip *chip)
203a5736e0bSMichael Hennerich {
204a5736e0bSMichael Hennerich return device_for_each_child(chip->dev, NULL, __remove_subdev);
205a5736e0bSMichael Hennerich }
206a5736e0bSMichael Hennerich
adp5520_probe(struct i2c_client * client)20748c2c366SUwe Kleine-König static int adp5520_probe(struct i2c_client *client)
208a5736e0bSMichael Hennerich {
20948c2c366SUwe Kleine-König const struct i2c_device_id *id = i2c_client_get_device_id(client);
210334a41ceSJingoo Han struct adp5520_platform_data *pdata = dev_get_platdata(&client->dev);
211a5736e0bSMichael Hennerich struct platform_device *pdev;
212a5736e0bSMichael Hennerich struct adp5520_chip *chip;
213a5736e0bSMichael Hennerich int ret;
214a5736e0bSMichael Hennerich
215a5736e0bSMichael Hennerich if (!i2c_check_functionality(client->adapter,
216a5736e0bSMichael Hennerich I2C_FUNC_SMBUS_BYTE_DATA)) {
217a5736e0bSMichael Hennerich dev_err(&client->dev, "SMBUS Word Data not Supported\n");
218a5736e0bSMichael Hennerich return -EIO;
219a5736e0bSMichael Hennerich }
220a5736e0bSMichael Hennerich
221a5736e0bSMichael Hennerich if (pdata == NULL) {
222a5736e0bSMichael Hennerich dev_err(&client->dev, "missing platform data\n");
223a5736e0bSMichael Hennerich return -ENODEV;
224a5736e0bSMichael Hennerich }
225a5736e0bSMichael Hennerich
22676ba0b89SLee Jones chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
227a5736e0bSMichael Hennerich if (!chip)
228a5736e0bSMichael Hennerich return -ENOMEM;
229a5736e0bSMichael Hennerich
230a5736e0bSMichael Hennerich i2c_set_clientdata(client, chip);
231a5736e0bSMichael Hennerich chip->client = client;
232a5736e0bSMichael Hennerich
233a5736e0bSMichael Hennerich chip->dev = &client->dev;
234a5736e0bSMichael Hennerich chip->irq = client->irq;
235a5736e0bSMichael Hennerich chip->id = id->driver_data;
236a5736e0bSMichael Hennerich mutex_init(&chip->lock);
237a5736e0bSMichael Hennerich
238a5736e0bSMichael Hennerich if (chip->irq) {
239a5736e0bSMichael Hennerich BLOCKING_INIT_NOTIFIER_HEAD(&chip->notifier_list);
240a5736e0bSMichael Hennerich
241a5736e0bSMichael Hennerich ret = request_threaded_irq(chip->irq, NULL, adp5520_irq_thread,
242a5736e0bSMichael Hennerich IRQF_TRIGGER_LOW | IRQF_ONESHOT,
243a5736e0bSMichael Hennerich "adp5520", chip);
244a5736e0bSMichael Hennerich if (ret) {
245a5736e0bSMichael Hennerich dev_err(&client->dev, "failed to request irq %d\n",
246a5736e0bSMichael Hennerich chip->irq);
24776ba0b89SLee Jones return ret;
248a5736e0bSMichael Hennerich }
249a5736e0bSMichael Hennerich }
250a5736e0bSMichael Hennerich
251a5736e0bSMichael Hennerich ret = adp5520_write(chip->dev, ADP5520_MODE_STATUS, ADP5520_nSTNBY);
252a5736e0bSMichael Hennerich if (ret) {
253a5736e0bSMichael Hennerich dev_err(&client->dev, "failed to write\n");
254a5736e0bSMichael Hennerich goto out_free_irq;
255a5736e0bSMichael Hennerich }
256a5736e0bSMichael Hennerich
257a5736e0bSMichael Hennerich if (pdata->keys) {
258a5736e0bSMichael Hennerich pdev = platform_device_register_data(chip->dev, "adp5520-keys",
259a5736e0bSMichael Hennerich chip->id, pdata->keys, sizeof(*pdata->keys));
260a5736e0bSMichael Hennerich if (IS_ERR(pdev)) {
261a5736e0bSMichael Hennerich ret = PTR_ERR(pdev);
262a5736e0bSMichael Hennerich goto out_remove_subdevs;
263a5736e0bSMichael Hennerich }
264a5736e0bSMichael Hennerich }
265a5736e0bSMichael Hennerich
266a5736e0bSMichael Hennerich if (pdata->gpio) {
267a5736e0bSMichael Hennerich pdev = platform_device_register_data(chip->dev, "adp5520-gpio",
268a5736e0bSMichael Hennerich chip->id, pdata->gpio, sizeof(*pdata->gpio));
269a5736e0bSMichael Hennerich if (IS_ERR(pdev)) {
270a5736e0bSMichael Hennerich ret = PTR_ERR(pdev);
271a5736e0bSMichael Hennerich goto out_remove_subdevs;
272a5736e0bSMichael Hennerich }
273a5736e0bSMichael Hennerich }
274a5736e0bSMichael Hennerich
275a5736e0bSMichael Hennerich if (pdata->leds) {
276a5736e0bSMichael Hennerich pdev = platform_device_register_data(chip->dev, "adp5520-led",
277a5736e0bSMichael Hennerich chip->id, pdata->leds, sizeof(*pdata->leds));
278a5736e0bSMichael Hennerich if (IS_ERR(pdev)) {
279a5736e0bSMichael Hennerich ret = PTR_ERR(pdev);
280a5736e0bSMichael Hennerich goto out_remove_subdevs;
281a5736e0bSMichael Hennerich }
282a5736e0bSMichael Hennerich }
283a5736e0bSMichael Hennerich
284a5736e0bSMichael Hennerich if (pdata->backlight) {
285a5736e0bSMichael Hennerich pdev = platform_device_register_data(chip->dev,
286a5736e0bSMichael Hennerich "adp5520-backlight",
287a5736e0bSMichael Hennerich chip->id,
288a5736e0bSMichael Hennerich pdata->backlight,
289a5736e0bSMichael Hennerich sizeof(*pdata->backlight));
290a5736e0bSMichael Hennerich if (IS_ERR(pdev)) {
291a5736e0bSMichael Hennerich ret = PTR_ERR(pdev);
292a5736e0bSMichael Hennerich goto out_remove_subdevs;
293a5736e0bSMichael Hennerich }
294a5736e0bSMichael Hennerich }
295a5736e0bSMichael Hennerich
296a5736e0bSMichael Hennerich return 0;
297a5736e0bSMichael Hennerich
298a5736e0bSMichael Hennerich out_remove_subdevs:
299a5736e0bSMichael Hennerich adp5520_remove_subdevs(chip);
300a5736e0bSMichael Hennerich
301a5736e0bSMichael Hennerich out_free_irq:
302a5736e0bSMichael Hennerich if (chip->irq)
303a5736e0bSMichael Hennerich free_irq(chip->irq, chip);
304a5736e0bSMichael Hennerich
305a5736e0bSMichael Hennerich return ret;
306a5736e0bSMichael Hennerich }
307a5736e0bSMichael Hennerich
adp5520_suspend(struct device * dev)308dc781454SMark Brown static int adp5520_suspend(struct device *dev)
309a5736e0bSMichael Hennerich {
310dc781454SMark Brown struct i2c_client *client = to_i2c_client(dev);
311a5736e0bSMichael Hennerich struct adp5520_chip *chip = dev_get_drvdata(&client->dev);
312a5736e0bSMichael Hennerich
313c6cc25fdSLars-Peter Clausen adp5520_read(chip->dev, ADP5520_MODE_STATUS, &chip->mode);
314c6cc25fdSLars-Peter Clausen /* All other bits are W1C */
315c6cc25fdSLars-Peter Clausen chip->mode &= ADP5520_BL_EN | ADP5520_DIM_EN | ADP5520_nSTNBY;
316c6cc25fdSLars-Peter Clausen adp5520_write(chip->dev, ADP5520_MODE_STATUS, 0);
317a5736e0bSMichael Hennerich return 0;
318a5736e0bSMichael Hennerich }
319a5736e0bSMichael Hennerich
adp5520_resume(struct device * dev)320dc781454SMark Brown static int adp5520_resume(struct device *dev)
321a5736e0bSMichael Hennerich {
322dc781454SMark Brown struct i2c_client *client = to_i2c_client(dev);
323a5736e0bSMichael Hennerich struct adp5520_chip *chip = dev_get_drvdata(&client->dev);
324a5736e0bSMichael Hennerich
325c6cc25fdSLars-Peter Clausen adp5520_write(chip->dev, ADP5520_MODE_STATUS, chip->mode);
326a5736e0bSMichael Hennerich return 0;
327a5736e0bSMichael Hennerich }
328a5736e0bSMichael Hennerich
3295745a90aSPaul Cercueil static DEFINE_SIMPLE_DEV_PM_OPS(adp5520_pm, adp5520_suspend, adp5520_resume);
330dc781454SMark Brown
331a5736e0bSMichael Hennerich static const struct i2c_device_id adp5520_id[] = {
332a5736e0bSMichael Hennerich { "pmic-adp5520", ID_ADP5520 },
333a5736e0bSMichael Hennerich { "pmic-adp5501", ID_ADP5501 },
334a5736e0bSMichael Hennerich { }
335a5736e0bSMichael Hennerich };
336a5736e0bSMichael Hennerich
337a5736e0bSMichael Hennerich static struct i2c_driver adp5520_driver = {
338a5736e0bSMichael Hennerich .driver = {
339a5736e0bSMichael Hennerich .name = "adp5520",
3405745a90aSPaul Cercueil .pm = pm_sleep_ptr(&adp5520_pm),
3416b09274bSPaul Gortmaker .suppress_bind_attrs = true,
342a5736e0bSMichael Hennerich },
343*9816d859SUwe Kleine-König .probe = adp5520_probe,
344a5736e0bSMichael Hennerich .id_table = adp5520_id,
345a5736e0bSMichael Hennerich };
3466b09274bSPaul Gortmaker builtin_i2c_driver(adp5520_driver);
347