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 * Derived from da903x:
11 * Copyright (C) 2008 Compulab, Ltd.
12 * Mike Rapoport <mike@compulab.co.il>
14 * Copyright (C) 2006-2008 Marvell International Ltd.
15 * Eric Miao <eric.miao@marvell.com>
17 * Licensed under the GPL-2 or later.
20 #include <linux/kernel.h>
21 #include <linux/module.h>
22 #include <linux/platform_device.h>
23 #include <linux/slab.h>
24 #include <linux/interrupt.h>
25 #include <linux/irq.h>
26 #include <linux/err.h>
27 #include <linux/i2c.h>
29 #include <linux/mfd/adp5520.h>
32 struct i2c_client *client;
35 struct blocking_notifier_head notifier_list;
41 static int __adp5520_read(struct i2c_client *client,
42 int reg, uint8_t *val)
46 ret = i2c_smbus_read_byte_data(client, reg);
48 dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
56 static int __adp5520_write(struct i2c_client *client,
61 ret = i2c_smbus_write_byte_data(client, reg, val);
63 dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n",
70 static int __adp5520_ack_bits(struct i2c_client *client, int reg,
73 struct adp5520_chip *chip = i2c_get_clientdata(client);
77 mutex_lock(&chip->lock);
79 ret = __adp5520_read(client, reg, ®_val);
83 ret = __adp5520_write(client, reg, reg_val);
86 mutex_unlock(&chip->lock);
90 int adp5520_write(struct device *dev, int reg, uint8_t val)
92 return __adp5520_write(to_i2c_client(dev), reg, val);
94 EXPORT_SYMBOL_GPL(adp5520_write);
96 int adp5520_read(struct device *dev, int reg, uint8_t *val)
98 return __adp5520_read(to_i2c_client(dev), reg, val);
100 EXPORT_SYMBOL_GPL(adp5520_read);
102 int adp5520_set_bits(struct device *dev, int reg, uint8_t bit_mask)
104 struct adp5520_chip *chip = dev_get_drvdata(dev);
108 mutex_lock(&chip->lock);
110 ret = __adp5520_read(chip->client, reg, ®_val);
112 if (!ret && ((reg_val & bit_mask) != bit_mask)) {
114 ret = __adp5520_write(chip->client, reg, reg_val);
117 mutex_unlock(&chip->lock);
120 EXPORT_SYMBOL_GPL(adp5520_set_bits);
122 int adp5520_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
124 struct adp5520_chip *chip = dev_get_drvdata(dev);
128 mutex_lock(&chip->lock);
130 ret = __adp5520_read(chip->client, reg, ®_val);
132 if (!ret && (reg_val & bit_mask)) {
133 reg_val &= ~bit_mask;
134 ret = __adp5520_write(chip->client, reg, reg_val);
137 mutex_unlock(&chip->lock);
140 EXPORT_SYMBOL_GPL(adp5520_clr_bits);
142 int adp5520_register_notifier(struct device *dev, struct notifier_block *nb,
145 struct adp5520_chip *chip = dev_get_drvdata(dev);
148 adp5520_set_bits(chip->dev, ADP5520_INTERRUPT_ENABLE,
149 events & (ADP5520_KP_IEN | ADP5520_KR_IEN |
150 ADP5520_OVP_IEN | ADP5520_CMPR_IEN));
152 return blocking_notifier_chain_register(&chip->notifier_list,
158 EXPORT_SYMBOL_GPL(adp5520_register_notifier);
160 int adp5520_unregister_notifier(struct device *dev, struct notifier_block *nb,
163 struct adp5520_chip *chip = dev_get_drvdata(dev);
165 adp5520_clr_bits(chip->dev, ADP5520_INTERRUPT_ENABLE,
166 events & (ADP5520_KP_IEN | ADP5520_KR_IEN |
167 ADP5520_OVP_IEN | ADP5520_CMPR_IEN));
169 return blocking_notifier_chain_unregister(&chip->notifier_list, nb);
171 EXPORT_SYMBOL_GPL(adp5520_unregister_notifier);
173 static irqreturn_t adp5520_irq_thread(int irq, void *data)
175 struct adp5520_chip *chip = data;
180 ret = __adp5520_read(chip->client, ADP5520_MODE_STATUS, ®_val);
184 events = reg_val & (ADP5520_OVP_INT | ADP5520_CMPR_INT |
185 ADP5520_GPI_INT | ADP5520_KR_INT | ADP5520_KP_INT);
187 blocking_notifier_call_chain(&chip->notifier_list, events, NULL);
188 /* ACK, Sticky bits are W1C */
189 __adp5520_ack_bits(chip->client, ADP5520_MODE_STATUS, events);
195 static int __remove_subdev(struct device *dev, void *unused)
197 platform_device_unregister(to_platform_device(dev));
201 static int adp5520_remove_subdevs(struct adp5520_chip *chip)
203 return device_for_each_child(chip->dev, NULL, __remove_subdev);
206 static int adp5520_probe(struct i2c_client *client,
207 const struct i2c_device_id *id)
209 struct adp5520_platform_data *pdata = dev_get_platdata(&client->dev);
210 struct platform_device *pdev;
211 struct adp5520_chip *chip;
214 if (!i2c_check_functionality(client->adapter,
215 I2C_FUNC_SMBUS_BYTE_DATA)) {
216 dev_err(&client->dev, "SMBUS Word Data not Supported\n");
221 dev_err(&client->dev, "missing platform data\n");
225 chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
229 i2c_set_clientdata(client, chip);
230 chip->client = client;
232 chip->dev = &client->dev;
233 chip->irq = client->irq;
234 chip->id = id->driver_data;
235 mutex_init(&chip->lock);
238 BLOCKING_INIT_NOTIFIER_HEAD(&chip->notifier_list);
240 ret = request_threaded_irq(chip->irq, NULL, adp5520_irq_thread,
241 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
244 dev_err(&client->dev, "failed to request irq %d\n",
250 ret = adp5520_write(chip->dev, ADP5520_MODE_STATUS, ADP5520_nSTNBY);
252 dev_err(&client->dev, "failed to write\n");
257 pdev = platform_device_register_data(chip->dev, "adp5520-keys",
258 chip->id, pdata->keys, sizeof(*pdata->keys));
261 goto out_remove_subdevs;
266 pdev = platform_device_register_data(chip->dev, "adp5520-gpio",
267 chip->id, pdata->gpio, sizeof(*pdata->gpio));
270 goto out_remove_subdevs;
275 pdev = platform_device_register_data(chip->dev, "adp5520-led",
276 chip->id, pdata->leds, sizeof(*pdata->leds));
279 goto out_remove_subdevs;
283 if (pdata->backlight) {
284 pdev = platform_device_register_data(chip->dev,
288 sizeof(*pdata->backlight));
291 goto out_remove_subdevs;
298 adp5520_remove_subdevs(chip);
302 free_irq(chip->irq, chip);
307 static int adp5520_remove(struct i2c_client *client)
309 struct adp5520_chip *chip = dev_get_drvdata(&client->dev);
312 free_irq(chip->irq, chip);
314 adp5520_remove_subdevs(chip);
315 adp5520_write(chip->dev, ADP5520_MODE_STATUS, 0);
319 #ifdef CONFIG_PM_SLEEP
320 static int adp5520_suspend(struct device *dev)
322 struct i2c_client *client = to_i2c_client(dev);
323 struct adp5520_chip *chip = dev_get_drvdata(&client->dev);
325 adp5520_read(chip->dev, ADP5520_MODE_STATUS, &chip->mode);
326 /* All other bits are W1C */
327 chip->mode &= ADP5520_BL_EN | ADP5520_DIM_EN | ADP5520_nSTNBY;
328 adp5520_write(chip->dev, ADP5520_MODE_STATUS, 0);
332 static int adp5520_resume(struct device *dev)
334 struct i2c_client *client = to_i2c_client(dev);
335 struct adp5520_chip *chip = dev_get_drvdata(&client->dev);
337 adp5520_write(chip->dev, ADP5520_MODE_STATUS, chip->mode);
342 static SIMPLE_DEV_PM_OPS(adp5520_pm, adp5520_suspend, adp5520_resume);
344 static const struct i2c_device_id adp5520_id[] = {
345 { "pmic-adp5520", ID_ADP5520 },
346 { "pmic-adp5501", ID_ADP5501 },
349 MODULE_DEVICE_TABLE(i2c, adp5520_id);
351 static struct i2c_driver adp5520_driver = {
354 .owner = THIS_MODULE,
357 .probe = adp5520_probe,
358 .remove = adp5520_remove,
359 .id_table = adp5520_id,
362 module_i2c_driver(adp5520_driver);
364 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
365 MODULE_DESCRIPTION("ADP5520(01) PMIC-MFD Driver");
366 MODULE_LICENSE("GPL");