1 // SPDX-License-Identifier: GPL-2.0+
3 // max14577.c - mfd core driver for the Maxim 14577/77836
17 #include <linux/mfd/max14577-private.h>
41  * maxim_charger_calc_reg_current - Calculate register value for current
53  *  - is always between <limits.min, limits.max>;
54  *  - is always less or equal to max_ua;
55  *  - is the highest possible value;
56  *  - may be lower than min_ua.
58  * On success returns 0. On error returns -EINVAL (requested min/max current
67 		return -EINVAL;  in maxim_charger_calc_reg_current()
69 	if (min_ua > limits->max || max_ua < limits->min)  in maxim_charger_calc_reg_current()
70 		return -EINVAL;  in maxim_charger_calc_reg_current()
72 	if (max_ua < limits->high_start) {  in maxim_charger_calc_reg_current()
82 	max_ua = min(limits->max, max_ua);  in maxim_charger_calc_reg_current()
83 	max_ua -= limits->high_start;  in maxim_charger_calc_reg_current()
86 	 *  - max_ua >= limits.high_start  in maxim_charger_calc_reg_current()
87 	 *  - BUILD_BUG checks that 'limits' are: max >= high_start + high_step  in maxim_charger_calc_reg_current()
89 	current_bits = max_ua / limits->high_step;  in maxim_charger_calc_reg_current()
102 		.name = "max14577-muic",
103 		.of_compatible = "maxim,max14577-muic",
106 		.name = "max14577-regulator",
107 		.of_compatible = "maxim,max14577-regulator",
110 		.name = "max14577-charger",
111 		.of_compatible = "maxim,max14577-charger",
117 		.name = "max77836-muic",
118 		.of_compatible = "maxim,max77836-muic",
121 		.name = "max77836-regulator",
122 		.of_compatible = "maxim,max77836-regulator",
125 		.name = "max77836-charger",
126 		.of_compatible = "maxim,max77836-charger",
129 		.name = "max77836-battery",
130 		.of_compatible = "maxim,max77836-battery",
140 		.compatible = "maxim,max77836",
159 	/* Any max14577 volatile registers are also max77836 volatile. */  in max77836_muic_volatile_reg()
239 	.name			= "max77836-muic",
253 	.name			= "max77836-pmic",
266 	ret = max14577_read_reg(max14577->regmap, MAX14577_REG_DEVICEID,  in max14577_print_dev_type()
269 		dev_err(max14577->dev,  in max14577_print_dev_type()
279 	dev_info(max14577->dev, "Device type: %u (ID: 0x%x, vendor: 0x%x)\n",  in max14577_print_dev_type()
280 			max14577->dev_type, device_id, vendor_id);  in max14577_print_dev_type()
284  * Max77836 specific initialization code for driver probe.
297 	max14577->i2c_pmic = i2c_new_dummy_device(max14577->i2c->adapter,  in max77836_init()
299 	if (IS_ERR(max14577->i2c_pmic)) {  in max77836_init()
300 		dev_err(max14577->dev, "Failed to register PMIC I2C device\n");  in max77836_init()
301 		return PTR_ERR(max14577->i2c_pmic);  in max77836_init()
303 	i2c_set_clientdata(max14577->i2c_pmic, max14577);  in max77836_init()
305 	max14577->regmap_pmic = devm_regmap_init_i2c(max14577->i2c_pmic,  in max77836_init()
307 	if (IS_ERR(max14577->regmap_pmic)) {  in max77836_init()
308 		ret = PTR_ERR(max14577->regmap_pmic);  in max77836_init()
309 		dev_err(max14577->dev, "Failed to allocate PMIC register map: %d\n",  in max77836_init()
314 	/* Un-mask MAX77836 Interrupt Source register */  in max77836_init()
315 	ret = max14577_read_reg(max14577->regmap_pmic,  in max77836_init()
318 		dev_err(max14577->dev, "Failed to read PMIC register\n");  in max77836_init()
324 	ret = max14577_write_reg(max14577->regmap_pmic,  in max77836_init()
327 		dev_err(max14577->dev, "Failed to write PMIC register\n");  in max77836_init()
331 	ret = regmap_add_irq_chip(max14577->regmap_pmic, max14577->irq,  in max77836_init()
334 			&max14577->irq_data_pmic);  in max77836_init()
336 		dev_err(max14577->dev, "Failed to request PMIC IRQ %d: %d\n",  in max77836_init()
337 				max14577->irq, ret);  in max77836_init()
344 	i2c_unregister_device(max14577->i2c_pmic);  in max77836_init()
350  * Max77836 specific de-initialization code for driver remove.
354 	regmap_del_irq_chip(max14577->irq, max14577->irq_data_pmic);  in max77836_remove()
355 	i2c_unregister_device(max14577->i2c_pmic);  in max77836_remove()
362 	struct max14577_platform_data *pdata = dev_get_platdata(&i2c->dev);  in max14577_i2c_probe()
363 	struct device_node *np = i2c->dev.of_node;  in max14577_i2c_probe()
371 		pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);  in max14577_i2c_probe()
373 			return -ENOMEM;  in max14577_i2c_probe()
374 		i2c->dev.platform_data = pdata;  in max14577_i2c_probe()
378 		dev_err(&i2c->dev, "No platform data found.\n");  in max14577_i2c_probe()
379 		return -EINVAL;  in max14577_i2c_probe()
382 	max14577 = devm_kzalloc(&i2c->dev, sizeof(*max14577), GFP_KERNEL);  in max14577_i2c_probe()
384 		return -ENOMEM;  in max14577_i2c_probe()
387 	max14577->dev = &i2c->dev;  in max14577_i2c_probe()
388 	max14577->i2c = i2c;  in max14577_i2c_probe()
389 	max14577->irq = i2c->irq;  in max14577_i2c_probe()
391 	max14577->regmap = devm_regmap_init_i2c(i2c,  in max14577_i2c_probe()
393 	if (IS_ERR(max14577->regmap)) {  in max14577_i2c_probe()
394 		ret = PTR_ERR(max14577->regmap);  in max14577_i2c_probe()
395 		dev_err(max14577->dev, "Failed to allocate register map: %d\n",  in max14577_i2c_probe()
403 		of_id = of_match_device(max14577_dt_match, &i2c->dev);  in max14577_i2c_probe()
405 			max14577->dev_type = (uintptr_t)of_id->data;  in max14577_i2c_probe()
407 		max14577->dev_type = id->driver_data;  in max14577_i2c_probe()
412 	switch (max14577->dev_type) {  in max14577_i2c_probe()
428 	ret = regmap_add_irq_chip(max14577->regmap, max14577->irq,  in max14577_i2c_probe()
430 				  &max14577->irq_data);  in max14577_i2c_probe()
432 		dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",  in max14577_i2c_probe()
433 				max14577->irq, ret);  in max14577_i2c_probe()
437 	/* Max77836 specific initialization code (additional regmap) */  in max14577_i2c_probe()
438 	if (max14577->dev_type == MAXIM_DEVICE_TYPE_MAX77836) {  in max14577_i2c_probe()
444 	ret = mfd_add_devices(max14577->dev, -1, mfd_devs,  in max14577_i2c_probe()
449 	device_init_wakeup(max14577->dev, 1);  in max14577_i2c_probe()
454 	if (max14577->dev_type == MAXIM_DEVICE_TYPE_MAX77836)  in max14577_i2c_probe()
457 	regmap_del_irq_chip(max14577->irq, max14577->irq_data);  in max14577_i2c_probe()
466 	mfd_remove_devices(max14577->dev);  in max14577_i2c_remove()
467 	regmap_del_irq_chip(max14577->irq, max14577->irq_data);  in max14577_i2c_remove()
468 	if (max14577->dev_type == MAXIM_DEVICE_TYPE_MAX77836)  in max14577_i2c_remove()
474 	{ "max77836", MAXIM_DEVICE_TYPE_MAX77836, },
485 		enable_irq_wake(max14577->irq);  in max14577_suspend()
487 	 * MUIC IRQ must be disabled during suspend because if it happens  in max14577_suspend()
495 	disable_irq(max14577->irq);  in max14577_suspend()
506 		disable_irq_wake(max14577->irq);  in max14577_resume()
507 	enable_irq(max14577->irq);  in max14577_resume()
555 MODULE_DESCRIPTION("Maxim 14577/77836 multi-function core driver");