1 // SPDX-License-Identifier: GPL-2.0
9 // Inspired from tps65086-regulator.c
29  * The PMIC has four sets of registers corresponding to four power modes:
30  * Performance, Active, Low-power, Hibernate.
33  * Each regulator has a register for each power mode. To access a register
34  * for a specific regulator and mode BASE_* and OFFSET_* need to be added.
41  * a low-power state while the PMIC is in Active mode. They are supposed to be
42  * configured at startup and then simply transition to/from a global low-power
43  * state by setting the GPIO lpm pin high/low.
45  * This driver keeps the PMIC in Active mode, Low-power state is set for the
46  * regulators by enabling/disabling operating mode (FPWM or Auto PFM).
48  * The PMIC's Low-power and Hibernate modes are used during standby/suspend.
49  * To enter standby/suspend the PMIC will go to Low-power mode. From there, it
50  * will transition to Hibernate when the PWRHLD line is set to low by the MPU.
78 static unsigned int mcp16502_of_map_mode(unsigned int mode)  in mcp16502_of_map_mode()  argument
80 	if (mode == REGULATOR_MODE_NORMAL || mode == REGULATOR_MODE_IDLE)  in mcp16502_of_map_mode()
81 		return mode;  in mcp16502_of_map_mode()
116  * struct mcp16502 - PMIC representation
126  * mcp16502_gpio_set_mode() - set the GPIO corresponding value
130 static void mcp16502_gpio_set_mode(struct mcp16502 *mcp, int mode)  in mcp16502_gpio_set_mode()  argument
132 	switch (mode) {  in mcp16502_gpio_set_mode()
134 		gpiod_set_value(mcp->lpm, 0);  in mcp16502_gpio_set_mode()
138 		gpiod_set_value(mcp->lpm, 1);  in mcp16502_gpio_set_mode()
141 		pr_err("%s: %d invalid\n", __func__, mode);  in mcp16502_gpio_set_mode()
146  * mcp16502_get_reg() - get the PMIC's configuration register for opmode
149  * @opmode: the PMIC's operating mode ACTIVE, Low-power, Hibernate
163 		return -EINVAL;  in mcp16502_get_reg()
168  * mcp16502_get_mode() - return the current operating mode of a regulator
171  *	 use the Active mode registers.
173  * Note: this is different from the PMIC's operatig mode, it is the
174  *	 MODE bit from the regulator's register.
185 	ret = regmap_read(rdev->regmap, reg, &val);  in mcp16502_get_mode()
200  * _mcp16502_set_mode() - helper for set_mode and set_suspend_mode
202  * @rdev: the regulator for which we are setting the mode
203  * @mode: the regulator's mode (the one from MODE bit)
204  * @opmode: the PMIC's operating mode: Active/Low-power/Hibernate
206 static int _mcp16502_set_mode(struct regulator_dev *rdev, unsigned int mode,  in _mcp16502_set_mode()  argument
216 	switch (mode) {  in _mcp16502_set_mode()
224 		return -EINVAL;  in _mcp16502_set_mode()
227 	reg = regmap_update_bits(rdev->regmap, reg, MCP16502_MODE, val);  in _mcp16502_set_mode()
232  * mcp16502_set_mode() - regulator_ops set_mode
234 static int mcp16502_set_mode(struct regulator_dev *rdev, unsigned int mode)  in mcp16502_set_mode()  argument
236 	return _mcp16502_set_mode(rdev, mode, MCP16502_OPMODE_ACTIVE);  in mcp16502_set_mode()
240  * mcp16502_get_status() - regulator_ops get_status
247 	ret = regmap_read(rdev->regmap, MCP16502_STAT_BASE(rdev_get_id(rdev)),  in mcp16502_get_status()
264  * mcp16502_suspend_get_target_reg() - get the reg of the target suspend PMIC
265  *				       mode
276 		dev_err(&rdev->dev, "invalid suspend target: %d\n",  in mcp16502_suspend_get_target_reg()
280 	return -EINVAL;  in mcp16502_suspend_get_target_reg()
284  * mcp16502_set_suspend_voltage() - regulator_ops set_suspend_voltage
297 	return regmap_update_bits(rdev->regmap, reg, MCP16502_VSEL, sel);  in mcp16502_set_suspend_voltage()
301  * mcp16502_set_suspend_mode() - regulator_ops set_suspend_mode
304 				     unsigned int mode)  in mcp16502_set_suspend_mode()  argument
308 		return _mcp16502_set_mode(rdev, mode, MCP16502_OPMODE_LPM);  in mcp16502_set_suspend_mode()
311 		return _mcp16502_set_mode(rdev, mode, MCP16502_OPMODE_HIB);  in mcp16502_set_suspend_mode()
313 		dev_err(&rdev->dev, "invalid suspend target: %d\n",  in mcp16502_set_suspend_mode()
317 	return -EINVAL;  in mcp16502_set_suspend_mode()
321  * mcp16502_set_suspend_enable() - regulator_ops set_suspend_enable
330 	return regmap_update_bits(rdev->regmap, reg, MCP16502_EN, MCP16502_EN);  in mcp16502_set_suspend_enable()
334  * mcp16502_set_suspend_disable() - regulator_ops set_suspend_disable
343 	return regmap_update_bits(rdev->regmap, reg, MCP16502_EN, 0);  in mcp16502_set_suspend_disable()
440 	dev = &client->dev;  in mcp16502_probe()
445 		return -ENOMEM;  in mcp16502_probe()
458 	mcp->lpm = devm_gpiod_get(dev, "lpm", GPIOD_OUT_LOW);  in mcp16502_probe()
459 	if (IS_ERR(mcp->lpm)) {  in mcp16502_probe()
460 		dev_err(dev, "failed to get lpm pin: %ld\n", PTR_ERR(mcp->lpm));  in mcp16502_probe()
461 		return PTR_ERR(mcp->lpm);  in mcp16502_probe()
516 		.name	= "mcp16502-regulator",