1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Base driver for Analog Devices ADP5520/ADP5501 MFD PMICs
4 * LCD Backlight: drivers/video/backlight/adp5520_bl
5 * LEDs : drivers/led/leds-adp5520
6 * GPIO : drivers/gpio/adp5520-gpio (ADP5520 only)
7 * Keys : drivers/input/keyboard/adp5520-keys (ADP5520 only)
9 * Copyright 2009 Analog Devices Inc.
11 * Author: Michael Hennerich <michael.hennerich@analog.com>
13 * Derived from da903x:
14 * Copyright (C) 2008 Compulab, Ltd.
15 * Mike Rapoport <mike@compulab.co.il>
17 * Copyright (C) 2006-2008 Marvell International Ltd.
18 * Eric Miao <eric.miao@marvell.com>
21 #include <linux/kernel.h>
22 #include <linux/init.h>
23 #include <linux/platform_device.h>
24 #include <linux/slab.h>
25 #include <linux/interrupt.h>
26 #include <linux/irq.h>
27 #include <linux/err.h>
28 #include <linux/i2c.h>
30 #include <linux/mfd/adp5520.h>
33 struct i2c_client *client;
36 struct blocking_notifier_head notifier_list;
42 static int __adp5520_read(struct i2c_client *client,
43 int reg, uint8_t *val)
47 ret = i2c_smbus_read_byte_data(client, reg);
49 dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
57 static int __adp5520_write(struct i2c_client *client,
62 ret = i2c_smbus_write_byte_data(client, reg, val);
64 dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n",
71 static int __adp5520_ack_bits(struct i2c_client *client, int reg,
74 struct adp5520_chip *chip = i2c_get_clientdata(client);
78 mutex_lock(&chip->lock);
80 ret = __adp5520_read(client, reg, ®_val);
84 ret = __adp5520_write(client, reg, reg_val);
87 mutex_unlock(&chip->lock);
91 int adp5520_write(struct device *dev, int reg, uint8_t val)
93 return __adp5520_write(to_i2c_client(dev), reg, val);
95 EXPORT_SYMBOL_GPL(adp5520_write);
97 int adp5520_read(struct device *dev, int reg, uint8_t *val)
99 return __adp5520_read(to_i2c_client(dev), reg, val);
101 EXPORT_SYMBOL_GPL(adp5520_read);
103 int adp5520_set_bits(struct device *dev, int reg, uint8_t bit_mask)
105 struct adp5520_chip *chip = dev_get_drvdata(dev);
109 mutex_lock(&chip->lock);
111 ret = __adp5520_read(chip->client, reg, ®_val);
113 if (!ret && ((reg_val & bit_mask) != bit_mask)) {
115 ret = __adp5520_write(chip->client, reg, reg_val);
118 mutex_unlock(&chip->lock);
121 EXPORT_SYMBOL_GPL(adp5520_set_bits);
123 int adp5520_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
125 struct adp5520_chip *chip = dev_get_drvdata(dev);
129 mutex_lock(&chip->lock);
131 ret = __adp5520_read(chip->client, reg, ®_val);
133 if (!ret && (reg_val & bit_mask)) {
134 reg_val &= ~bit_mask;
135 ret = __adp5520_write(chip->client, reg, reg_val);
138 mutex_unlock(&chip->lock);
141 EXPORT_SYMBOL_GPL(adp5520_clr_bits);
143 int adp5520_register_notifier(struct device *dev, struct notifier_block *nb,
146 struct adp5520_chip *chip = dev_get_drvdata(dev);
149 adp5520_set_bits(chip->dev, ADP5520_INTERRUPT_ENABLE,
150 events & (ADP5520_KP_IEN | ADP5520_KR_IEN |
151 ADP5520_OVP_IEN | ADP5520_CMPR_IEN));
153 return blocking_notifier_chain_register(&chip->notifier_list,
159 EXPORT_SYMBOL_GPL(adp5520_register_notifier);
161 int adp5520_unregister_notifier(struct device *dev, struct notifier_block *nb,
164 struct adp5520_chip *chip = dev_get_drvdata(dev);
166 adp5520_clr_bits(chip->dev, ADP5520_INTERRUPT_ENABLE,
167 events & (ADP5520_KP_IEN | ADP5520_KR_IEN |
168 ADP5520_OVP_IEN | ADP5520_CMPR_IEN));
170 return blocking_notifier_chain_unregister(&chip->notifier_list, nb);
172 EXPORT_SYMBOL_GPL(adp5520_unregister_notifier);
174 static irqreturn_t adp5520_irq_thread(int irq, void *data)
176 struct adp5520_chip *chip = data;
181 ret = __adp5520_read(chip->client, ADP5520_MODE_STATUS, ®_val);
185 events = reg_val & (ADP5520_OVP_INT | ADP5520_CMPR_INT |
186 ADP5520_GPI_INT | ADP5520_KR_INT | ADP5520_KP_INT);
188 blocking_notifier_call_chain(&chip->notifier_list, events, NULL);
189 /* ACK, Sticky bits are W1C */
190 __adp5520_ack_bits(chip->client, ADP5520_MODE_STATUS, events);
196 static int __remove_subdev(struct device *dev, void *unused)
198 platform_device_unregister(to_platform_device(dev));
202 static int adp5520_remove_subdevs(struct adp5520_chip *chip)
204 return device_for_each_child(chip->dev, NULL, __remove_subdev);
207 static int adp5520_probe(struct i2c_client *client,
208 const struct i2c_device_id *id)
210 struct adp5520_platform_data *pdata = dev_get_platdata(&client->dev);
211 struct platform_device *pdev;
212 struct adp5520_chip *chip;
215 if (!i2c_check_functionality(client->adapter,
216 I2C_FUNC_SMBUS_BYTE_DATA)) {
217 dev_err(&client->dev, "SMBUS Word Data not Supported\n");
222 dev_err(&client->dev, "missing platform data\n");
226 chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
230 i2c_set_clientdata(client, chip);
231 chip->client = client;
233 chip->dev = &client->dev;
234 chip->irq = client->irq;
235 chip->id = id->driver_data;
236 mutex_init(&chip->lock);
239 BLOCKING_INIT_NOTIFIER_HEAD(&chip->notifier_list);
241 ret = request_threaded_irq(chip->irq, NULL, adp5520_irq_thread,
242 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
245 dev_err(&client->dev, "failed to request irq %d\n",
251 ret = adp5520_write(chip->dev, ADP5520_MODE_STATUS, ADP5520_nSTNBY);
253 dev_err(&client->dev, "failed to write\n");
258 pdev = platform_device_register_data(chip->dev, "adp5520-keys",
259 chip->id, pdata->keys, sizeof(*pdata->keys));
262 goto out_remove_subdevs;
267 pdev = platform_device_register_data(chip->dev, "adp5520-gpio",
268 chip->id, pdata->gpio, sizeof(*pdata->gpio));
271 goto out_remove_subdevs;
276 pdev = platform_device_register_data(chip->dev, "adp5520-led",
277 chip->id, pdata->leds, sizeof(*pdata->leds));
280 goto out_remove_subdevs;
284 if (pdata->backlight) {
285 pdev = platform_device_register_data(chip->dev,
289 sizeof(*pdata->backlight));
292 goto out_remove_subdevs;
299 adp5520_remove_subdevs(chip);
303 free_irq(chip->irq, chip);
308 #ifdef CONFIG_PM_SLEEP
309 static int adp5520_suspend(struct device *dev)
311 struct i2c_client *client = to_i2c_client(dev);
312 struct adp5520_chip *chip = dev_get_drvdata(&client->dev);
314 adp5520_read(chip->dev, ADP5520_MODE_STATUS, &chip->mode);
315 /* All other bits are W1C */
316 chip->mode &= ADP5520_BL_EN | ADP5520_DIM_EN | ADP5520_nSTNBY;
317 adp5520_write(chip->dev, ADP5520_MODE_STATUS, 0);
321 static int adp5520_resume(struct device *dev)
323 struct i2c_client *client = to_i2c_client(dev);
324 struct adp5520_chip *chip = dev_get_drvdata(&client->dev);
326 adp5520_write(chip->dev, ADP5520_MODE_STATUS, chip->mode);
331 static SIMPLE_DEV_PM_OPS(adp5520_pm, adp5520_suspend, adp5520_resume);
333 static const struct i2c_device_id adp5520_id[] = {
334 { "pmic-adp5520", ID_ADP5520 },
335 { "pmic-adp5501", ID_ADP5501 },
339 static struct i2c_driver adp5520_driver = {
343 .suppress_bind_attrs = true,
345 .probe = adp5520_probe,
346 .id_table = adp5520_id,
348 builtin_i2c_driver(adp5520_driver);