1 // SPDX-License-Identifier: GPL-2.0
3 // bd71837-regulator.c ROHM BD71837MWV regulator driver
10 #include <linux/mfd/rohm-bd718x7.h>
20 	struct bd71837 *mfd;
36 	struct bd71837_pmic *pmic = rdev_get_drvdata(rdev);  in bd71837_buck1234_set_ramp_delay()  local
37 	struct bd71837 *mfd = pmic->mfd;  in bd71837_buck1234_set_ramp_delay()
38 	int id = rdev->desc->id;  in bd71837_buck1234_set_ramp_delay()
41 	dev_dbg(&pmic->pdev->dev, "Buck[%d] Set Ramp = %d\n", id + 1,  in bd71837_buck1234_set_ramp_delay()
58 		dev_err(&pmic->pdev->dev,  in bd71837_buck1234_set_ramp_delay()
60 			rdev->desc->name, ramp_delay);  in bd71837_buck1234_set_ramp_delay()
63 	return regmap_update_bits(mfd->regmap, BD71837_REG_BUCK1_CTRL + id,  in bd71837_buck1234_set_ramp_delay()
69  * is changed. Hence we return -EBUSY for these if voltage is changed
76 		return -EBUSY;  in bd71837_set_voltage_sel_restricted()
492 	struct bd71837_pmic *pmic;  in bd71837_probe()  local
545 	pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);  in bd71837_probe()
546 	if (!pmic)  in bd71837_probe()
547 		return -ENOMEM;  in bd71837_probe()
549 	memcpy(pmic->descs, bd71837_regulators, sizeof(pmic->descs));  in bd71837_probe()
551 	pmic->pdev = pdev;  in bd71837_probe()
552 	pmic->mfd = dev_get_drvdata(pdev->dev.parent);  in bd71837_probe()
554 	if (!pmic->mfd) {  in bd71837_probe()
555 		dev_err(&pdev->dev, "No MFD driver data\n");  in bd71837_probe()
556 		err = -EINVAL;  in bd71837_probe()
559 	platform_set_drvdata(pdev, pmic);  in bd71837_probe()
562 	err = regmap_update_bits(pmic->mfd->regmap, BD71837_REG_REGLOCK,  in bd71837_probe()
565 		dev_err(&pmic->pdev->dev, "Failed to unlock PMIC (%d)\n", err);  in bd71837_probe()
568 		dev_dbg(&pmic->pdev->dev, "Unlocked lock register 0x%x\n",  in bd71837_probe()
573 	 * There is a HW quirk in BD71837. The shutdown sequence timings for  in bd71837_probe()
575 	 * At PMIC poweroff the voltage for BUCK6/7 is cut immediately at the  in bd71837_probe()
576 	 * beginning of shut-down sequence. As bucks 6 and 7 are parent  in bd71837_probe()
577 	 * supplies for LDO5 and LDO6 - this causes LDO5/6 voltage  in bd71837_probe()
578 	 * monitoring to errorneously detect under voltage and force PMIC to  in bd71837_probe()
582 	err = regmap_update_bits(pmic->mfd->regmap, BD718XX_REG_MVRFLTMASK2,  in bd71837_probe()
586 		dev_err(&pmic->pdev->dev,  in bd71837_probe()
596 		desc = &pmic->descs[i];  in bd71837_probe()
598 		config.dev = pdev->dev.parent;  in bd71837_probe()
599 		config.driver_data = pmic;  in bd71837_probe()
600 		config.regmap = pmic->mfd->regmap;  in bd71837_probe()
602 		rdev = devm_regulator_register(&pdev->dev, desc, &config);  in bd71837_probe()
604 			dev_err(pmic->mfd->dev,  in bd71837_probe()
606 				desc->name);  in bd71837_probe()
613 		 * can now switch the control from PMIC state machine to the  in bd71837_probe()
616 		err = regmap_update_bits(pmic->mfd->regmap,  in bd71837_probe()
621 			dev_err(&pmic->pdev->dev,  in bd71837_probe()
623 				desc->name);  in bd71837_probe()
627 		pmic->rdev[i] = rdev;  in bd71837_probe()
636 		.name = "bd71837-pmic",
644 MODULE_DESCRIPTION("BD71837 voltage regulator driver");