drivers/mfd/retu-mfd.c

143 int retu_read(struct retu_dev *rdev, u8 reg)
148 	mutex_lock(&rdev->mutex);
149 	ret = regmap_read(rdev->regmap, reg, &value);
150 	mutex_unlock(&rdev->mutex);
156 int retu_write(struct retu_dev *rdev, u8 reg, u16 data)
160 	mutex_lock(&rdev->mutex);
161 	ret = regmap_write(rdev->regmap, reg, data);
162 	mutex_unlock(&rdev->mutex);
170 	struct retu_dev *rdev = retu_pm_power_off;
176 	regmap_read(rdev->regmap, RETU_REG_CC1, &reg);
177 	regmap_write(rdev->regmap, RETU_REG_CC1, reg | 2);
180 	regmap_write(rdev->regmap, RETU_REG_WATCHDOG, 0);
233 	struct retu_dev *rdev;
240 	rdev = devm_kzalloc(&i2c->dev, sizeof(*rdev), GFP_KERNEL);
241 	if (rdev == NULL)
244 	i2c_set_clientdata(i2c, rdev);
245 	rdev->dev = &i2c->dev;
246 	mutex_init(&rdev->mutex);
247 	rdev->regmap = devm_regmap_init(&i2c->dev, &retu_bus, &i2c->dev,
249 	if (IS_ERR(rdev->regmap))
250 		return PTR_ERR(rdev->regmap);
252 	ret = retu_read(rdev, RETU_REG_ASICR);
254 		dev_err(rdev->dev, "could not read %s revision: %d\n",
259 	dev_info(rdev->dev, "%s%s%s v%d.%d found\n", rdat->chip_name,
265 	ret = retu_write(rdev, rdat->irq_chip->mask_base, 0xffff);
269 	ret = regmap_add_irq_chip(rdev->regmap, i2c->irq, IRQF_ONESHOT, -1,
270 				  rdat->irq_chip, &rdev->irq_data);
274 	ret = mfd_add_devices(rdev->dev, -1, rdat->children, rdat->nchildren,
275 			      NULL, regmap_irq_chip_get_base(rdev->irq_data),
278 		regmap_del_irq_chip(i2c->irq, rdev->irq_data);
283 		retu_pm_power_off = rdev;
292 	struct retu_dev *rdev = i2c_get_clientdata(i2c);
294 	if (retu_pm_power_off == rdev) {
298 	mfd_remove_devices(rdev->dev);
299 	regmap_del_irq_chip(i2c->irq, rdev->irq_data);