2 * Base driver for Analog Devices ADP5520/ADP5501 MFD PMICs
3 * LCD Backlight: drivers/video/backlight/adp5520_bl
4 * LEDs : drivers/led/leds-adp5520
5 * GPIO : drivers/gpio/adp5520-gpio (ADP5520 only)
6 * Keys : drivers/input/keyboard/adp5520-keys (ADP5520 only)
8 * Copyright 2009 Analog Devices Inc.
10 * Author: Michael Hennerich <michael.hennerich@analog.com>
12 * Derived from da903x:
13 * Copyright (C) 2008 Compulab, Ltd.
14 * Mike Rapoport <mike@compulab.co.il>
16 * Copyright (C) 2006-2008 Marvell International Ltd.
17 * Eric Miao <eric.miao@marvell.com>
19 * Licensed under the GPL-2 or later.
22 #include <linux/kernel.h>
23 #include <linux/init.h>
24 #include <linux/platform_device.h>
25 #include <linux/slab.h>
26 #include <linux/interrupt.h>
27 #include <linux/irq.h>
28 #include <linux/err.h>
29 #include <linux/i2c.h>
31 #include <linux/mfd/adp5520.h>
34 struct i2c_client *client;
37 struct blocking_notifier_head notifier_list;
43 static int __adp5520_read(struct i2c_client *client,
44 int reg, uint8_t *val)
48 ret = i2c_smbus_read_byte_data(client, reg);
50 dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
58 static int __adp5520_write(struct i2c_client *client,
63 ret = i2c_smbus_write_byte_data(client, reg, val);
65 dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n",
72 static int __adp5520_ack_bits(struct i2c_client *client, int reg,
75 struct adp5520_chip *chip = i2c_get_clientdata(client);
79 mutex_lock(&chip->lock);
81 ret = __adp5520_read(client, reg, ®_val);
85 ret = __adp5520_write(client, reg, reg_val);
88 mutex_unlock(&chip->lock);
92 int adp5520_write(struct device *dev, int reg, uint8_t val)
94 return __adp5520_write(to_i2c_client(dev), reg, val);
96 EXPORT_SYMBOL_GPL(adp5520_write);
98 int adp5520_read(struct device *dev, int reg, uint8_t *val)
100 return __adp5520_read(to_i2c_client(dev), reg, val);
102 EXPORT_SYMBOL_GPL(adp5520_read);
104 int adp5520_set_bits(struct device *dev, int reg, uint8_t bit_mask)
106 struct adp5520_chip *chip = dev_get_drvdata(dev);
110 mutex_lock(&chip->lock);
112 ret = __adp5520_read(chip->client, reg, ®_val);
114 if (!ret && ((reg_val & bit_mask) != bit_mask)) {
116 ret = __adp5520_write(chip->client, reg, reg_val);
119 mutex_unlock(&chip->lock);
122 EXPORT_SYMBOL_GPL(adp5520_set_bits);
124 int adp5520_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
126 struct adp5520_chip *chip = dev_get_drvdata(dev);
130 mutex_lock(&chip->lock);
132 ret = __adp5520_read(chip->client, reg, ®_val);
134 if (!ret && (reg_val & bit_mask)) {
135 reg_val &= ~bit_mask;
136 ret = __adp5520_write(chip->client, reg, reg_val);
139 mutex_unlock(&chip->lock);
142 EXPORT_SYMBOL_GPL(adp5520_clr_bits);
144 int adp5520_register_notifier(struct device *dev, struct notifier_block *nb,
147 struct adp5520_chip *chip = dev_get_drvdata(dev);
150 adp5520_set_bits(chip->dev, ADP5520_INTERRUPT_ENABLE,
151 events & (ADP5520_KP_IEN | ADP5520_KR_IEN |
152 ADP5520_OVP_IEN | ADP5520_CMPR_IEN));
154 return blocking_notifier_chain_register(&chip->notifier_list,
160 EXPORT_SYMBOL_GPL(adp5520_register_notifier);
162 int adp5520_unregister_notifier(struct device *dev, struct notifier_block *nb,
165 struct adp5520_chip *chip = dev_get_drvdata(dev);
167 adp5520_clr_bits(chip->dev, ADP5520_INTERRUPT_ENABLE,
168 events & (ADP5520_KP_IEN | ADP5520_KR_IEN |
169 ADP5520_OVP_IEN | ADP5520_CMPR_IEN));
171 return blocking_notifier_chain_unregister(&chip->notifier_list, nb);
173 EXPORT_SYMBOL_GPL(adp5520_unregister_notifier);
175 static irqreturn_t adp5520_irq_thread(int irq, void *data)
177 struct adp5520_chip *chip = data;
182 ret = __adp5520_read(chip->client, ADP5520_MODE_STATUS, ®_val);
186 events = reg_val & (ADP5520_OVP_INT | ADP5520_CMPR_INT |
187 ADP5520_GPI_INT | ADP5520_KR_INT | ADP5520_KP_INT);
189 blocking_notifier_call_chain(&chip->notifier_list, events, NULL);
190 /* ACK, Sticky bits are W1C */
191 __adp5520_ack_bits(chip->client, ADP5520_MODE_STATUS, events);
197 static int __remove_subdev(struct device *dev, void *unused)
199 platform_device_unregister(to_platform_device(dev));
203 static int adp5520_remove_subdevs(struct adp5520_chip *chip)
205 return device_for_each_child(chip->dev, NULL, __remove_subdev);
208 static int adp5520_probe(struct i2c_client *client,
209 const struct i2c_device_id *id)
211 struct adp5520_platform_data *pdata = dev_get_platdata(&client->dev);
212 struct platform_device *pdev;
213 struct adp5520_chip *chip;
216 if (!i2c_check_functionality(client->adapter,
217 I2C_FUNC_SMBUS_BYTE_DATA)) {
218 dev_err(&client->dev, "SMBUS Word Data not Supported\n");
223 dev_err(&client->dev, "missing platform data\n");
227 chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
231 i2c_set_clientdata(client, chip);
232 chip->client = client;
234 chip->dev = &client->dev;
235 chip->irq = client->irq;
236 chip->id = id->driver_data;
237 mutex_init(&chip->lock);
240 BLOCKING_INIT_NOTIFIER_HEAD(&chip->notifier_list);
242 ret = request_threaded_irq(chip->irq, NULL, adp5520_irq_thread,
243 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
246 dev_err(&client->dev, "failed to request irq %d\n",
252 ret = adp5520_write(chip->dev, ADP5520_MODE_STATUS, ADP5520_nSTNBY);
254 dev_err(&client->dev, "failed to write\n");
259 pdev = platform_device_register_data(chip->dev, "adp5520-keys",
260 chip->id, pdata->keys, sizeof(*pdata->keys));
263 goto out_remove_subdevs;
268 pdev = platform_device_register_data(chip->dev, "adp5520-gpio",
269 chip->id, pdata->gpio, sizeof(*pdata->gpio));
272 goto out_remove_subdevs;
277 pdev = platform_device_register_data(chip->dev, "adp5520-led",
278 chip->id, pdata->leds, sizeof(*pdata->leds));
281 goto out_remove_subdevs;
285 if (pdata->backlight) {
286 pdev = platform_device_register_data(chip->dev,
290 sizeof(*pdata->backlight));
293 goto out_remove_subdevs;
300 adp5520_remove_subdevs(chip);
304 free_irq(chip->irq, chip);
309 #ifdef CONFIG_PM_SLEEP
310 static int adp5520_suspend(struct device *dev)
312 struct i2c_client *client = to_i2c_client(dev);
313 struct adp5520_chip *chip = dev_get_drvdata(&client->dev);
315 adp5520_read(chip->dev, ADP5520_MODE_STATUS, &chip->mode);
316 /* All other bits are W1C */
317 chip->mode &= ADP5520_BL_EN | ADP5520_DIM_EN | ADP5520_nSTNBY;
318 adp5520_write(chip->dev, ADP5520_MODE_STATUS, 0);
322 static int adp5520_resume(struct device *dev)
324 struct i2c_client *client = to_i2c_client(dev);
325 struct adp5520_chip *chip = dev_get_drvdata(&client->dev);
327 adp5520_write(chip->dev, ADP5520_MODE_STATUS, chip->mode);
332 static SIMPLE_DEV_PM_OPS(adp5520_pm, adp5520_suspend, adp5520_resume);
334 static const struct i2c_device_id adp5520_id[] = {
335 { "pmic-adp5520", ID_ADP5520 },
336 { "pmic-adp5501", ID_ADP5501 },
340 static struct i2c_driver adp5520_driver = {
344 .suppress_bind_attrs = true,
346 .probe = adp5520_probe,
347 .id_table = adp5520_id,
349 builtin_i2c_driver(adp5520_driver);