1 // SPDX-License-Identifier: GPL-2.0+
3 // max77802.c - Regulator driver for the Maxim 77802
5 // Copyright (C) 2013-2014 Google, Inc
20 #include <linux/regulator/driver.h>
21 #include <linux/regulator/machine.h>
22 #include <linux/regulator/of_regulator.h>
24 #include <linux/mfd/max77686-private.h>
25 #include <dt-bindings/regulator/maxim,max77802.h>
61 	/* Array indexed by regulator id */
83 	return -EINVAL;  in max77802_get_opmode_shift()
87  * max77802_set_suspend_disable - Disable the regulator during system suspend
88  * @rdev: regulator to mark as disabled
91  * Configure the regulator so the PMIC will turn it OFF during system suspend.
100 	max77802->opmode[id] = val;  in max77802_set_suspend_disable()
101 	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,  in max77802_set_suspend_disable()
102 				  rdev->desc->enable_mask, val << shift);  in max77802_set_suspend_disable()
125 		dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",  in max77802_set_mode()
126 			 rdev->desc->name, mode);  in max77802_set_mode()
127 		return -EINVAL;  in max77802_set_mode()
130 	max77802->opmode[id] = val;  in max77802_set_mode()
131 	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,  in max77802_set_mode()
132 				  rdev->desc->enable_mask, val << shift);  in max77802_set_mode()
140 	return max77802_map_mode(max77802->opmode[id]);  in max77802_get_mode()
144  * max77802_set_suspend_mode - set regulator opmode when the system is suspended
145  * @rdev: regulator to change mode
149  * This function is valid for the three different enable control logics:
151  * Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35)
152  * Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21)
153  * Enable Control Logic3 by PWRREQ (LDO 3)
155  * If setting the regulator mode fails, the function only warns but does
156  * not return an error code to avoid the regulator core to stop setting
168 	 * If the regulator has been disabled for suspend  in max77802_set_suspend_mode()
171 	if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) {  in max77802_set_suspend_mode()
172 		dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n",  in max77802_set_suspend_mode()
173 			 rdev->desc->name, mode);  in max77802_set_suspend_mode()
180 		 * If the regulator opmode is normal then enable  in max77802_set_suspend_mode()
182 		 * already Low Power then no action is required.  in max77802_set_suspend_mode()
184 		if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL)  in max77802_set_suspend_mode()
191 		 * If the regulator operating mode is Low Power then  in max77802_set_suspend_mode()
193 		 * mode is already normal then no action is required.  in max77802_set_suspend_mode()
195 		if (max77802->opmode[id] == MAX77802_OPMODE_LP)  in max77802_set_suspend_mode()
196 			dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n",  in max77802_set_suspend_mode()
197 				 rdev->desc->name, mode);  in max77802_set_suspend_mode()
200 		dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",  in max77802_set_suspend_mode()
201 			 rdev->desc->name, mode);  in max77802_set_suspend_mode()
202 		return -EINVAL;  in max77802_set_suspend_mode()
205 	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,  in max77802_set_suspend_mode()
206 				  rdev->desc->enable_mask, val << shift);  in max77802_set_suspend_mode()
215 	if (max77802->opmode[id] == MAX77802_OFF_PWRREQ)  in max77802_enable()
216 		max77802->opmode[id] = MAX77802_OPMODE_NORMAL;  in max77802_enable()
218 	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,  in max77802_enable()
219 				  rdev->desc->enable_mask,  in max77802_enable()
220 				  max77802->opmode[id] << shift);  in max77802_enable()
224  * LDOs 2, 4-19, 22-35
230 	.enable			= max77802_enable,
246 	.enable			= max77802_enable,
261 	.enable			= max77802_enable,
270 /* BUCKs 2-4 */
275 	.enable			= max77802_enable,
285 /* BUCKs 5, 7-10 */
290 	.enable			= max77802_enable,
298 /* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */
312 	.vsel_reg	= MAX77802_REG_LDO1CTRL1 + num - 1,		\
314 	.enable_reg	= MAX77802_REG_LDO1CTRL1 + num - 1,		\
333 	.vsel_reg	= MAX77802_REG_LDO1CTRL1 + num - 1,		\
335 	.enable_reg	= MAX77802_REG_LDO1CTRL1 + num - 1,		\
365 /* BUCKS 2-4 */
412 /* BUCKs 7-10 */
426 	.vsel_reg	= MAX77802_REG_BUCK7OUT + (num - 7) * 3,	\
428 	.enable_reg	= MAX77802_REG_BUCK7CTRL + (num - 7) * 3,	\
480 	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);  in max77802_pmic_probe()
485 	max77802 = devm_kzalloc(&pdev->dev,  in max77802_pmic_probe()
489 		return -ENOMEM;  in max77802_pmic_probe()
491 	config.dev = iodev->dev;  in max77802_pmic_probe()
492 	config.regmap = iodev->regmap;  in max77802_pmic_probe()
502 		ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val);  in max77802_pmic_probe()
504 			dev_warn(&pdev->dev,  in max77802_pmic_probe()
512 		 * If the regulator is disabled and the system warm rebooted,  in max77802_pmic_probe()
513 		 * the hardware reports OFF as the regulator operating mode.  in max77802_pmic_probe()
517 			max77802->opmode[id] = MAX77802_OPMODE_NORMAL;  in max77802_pmic_probe()
519 			max77802->opmode[id] = val;  in max77802_pmic_probe()
521 		rdev = devm_regulator_register(&pdev->dev,  in max77802_pmic_probe()
525 			dev_err(&pdev->dev,  in max77802_pmic_probe()
526 				"regulator init failed for %d: %d\n", i, ret);  in max77802_pmic_probe()
535 	{"max77802-pmic", 0},
542 		.name = "max77802-pmic",
550 MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver");