// SPDX-License-Identifier: GPL-2.0+/* * Copyright 2012 Samsung Electronics Co., Ltd *                http://www.samsung.com * Copyright 2025 Linaro Ltd. * * Samsung SxM core driver */ #include <linux/device.h>#include <linux/err.h>#include <linux/export.h>#include <linux/interrupt.h>#include <linux/mfd/core.h>#include <linux/mfd/samsung/core.h>#include <linux/mfd/samsung/irq.h>#include <linux/mfd/samsung/s2mps11.h>#include <linux/mfd/samsung/s2mps13.h>#include <linux/mfd/samsung/s2mu005.h>#include <linux/module.h>#include <linux/of.h>#include <linux/pm.h>#include <linux/pm_runtime.h>#include <linux/regmap.h>#include "sec-core.h" static const struct resource s5m8767_rtc_resources[] = {	DEFINE_RES_IRQ_NAMED(S5M8767_IRQ_RTCA1, "alarm"),}; static const struct mfd_cell s5m8767_devs[] = {	MFD_CELL_NAME("s5m8767-pmic"),	MFD_CELL_RES("s5m-rtc", s5m8767_rtc_resources),	MFD_CELL_OF("s5m8767-clk", NULL, NULL, 0, 0, "samsung,s5m8767-clk"),}; static const struct mfd_cell s2dos05_devs[] = {	MFD_CELL_NAME("s2dos05-regulator"),}; static const struct resource s2mpg10_rtc_resources[] = {	DEFINE_RES_IRQ_NAMED(S2MPG10_IRQ_RTCA0, "alarm"),}; static const struct mfd_cell s2mpg10_devs[] = {	MFD_CELL_NAME("s2mpg10-meter"),	MFD_CELL_NAME("s2mpg10-regulator"),	MFD_CELL_RES("s2mpg10-rtc", s2mpg10_rtc_resources),	MFD_CELL_OF("s2mpg10-clk", NULL, NULL, 0, 0, "samsung,s2mpg10-clk"),	MFD_CELL_OF("s2mpg10-gpio", NULL, NULL, 0, 0, "samsung,s2mpg10-gpio"),}; static const struct mfd_cell s2mpg11_devs[] = {	MFD_CELL_NAME("s2mpg11-meter"),	MFD_CELL_NAME("s2mpg11-regulator"),	MFD_CELL_OF("s2mpg11-gpio", NULL, NULL, 0, 0, "samsung,s2mpg11-gpio"),}; static const struct resource s2mps11_rtc_resources[] = {	DEFINE_RES_IRQ_NAMED(S2MPS11_IRQ_RTCA0, "alarm"),}; static const struct mfd_cell s2mps11_devs[] = {	MFD_CELL_NAME("s2mps11-regulator"),	MFD_CELL_RES("s2mps14-rtc", s2mps11_rtc_resources),	MFD_CELL_OF("s2mps11-clk", NULL, NULL, 0, 0, "samsung,s2mps11-clk"),}; static const struct resource s2mps14_rtc_resources[] = {	DEFINE_RES_IRQ_NAMED(S2MPS14_IRQ_RTCA0, "alarm"),}; static const struct mfd_cell s2mps13_devs[] = {	MFD_CELL_NAME("s2mps13-regulator"),	MFD_CELL_RES("s2mps13-rtc", s2mps14_rtc_resources),	MFD_CELL_OF("s2mps13-clk", NULL, NULL, 0, 0, "samsung,s2mps13-clk"),}; static const struct mfd_cell s2mps14_devs[] = {	MFD_CELL_NAME("s2mps14-regulator"),	MFD_CELL_RES("s2mps14-rtc", s2mps14_rtc_resources),	MFD_CELL_OF("s2mps14-clk", NULL, NULL, 0, 0, "samsung,s2mps14-clk"),}; static const struct mfd_cell s2mps15_devs[] = {	MFD_CELL_NAME("s2mps15-regulator"),	MFD_CELL_RES("s2mps15-rtc", s2mps14_rtc_resources),	MFD_CELL_OF("s2mps13-clk", NULL, NULL, 0, 0, "samsung,s2mps13-clk"),}; static const struct mfd_cell s2mpa01_devs[] = {	MFD_CELL_NAME("s2mpa01-pmic"),	MFD_CELL_RES("s2mps14-rtc", s2mps14_rtc_resources),}; static const struct mfd_cell s2mpu02_devs[] = {	MFD_CELL_NAME("s2mpu02-regulator"),}; static const struct resource s2mpu05_rtc_resources[] = {	DEFINE_RES_IRQ_NAMED(S2MPU05_IRQ_RTCA0, "alarm"),}; static const struct mfd_cell s2mpu05_devs[] = {	MFD_CELL_NAME("s2mpu05-regulator"),	MFD_CELL_RES("s2mps15-rtc", s2mpu05_rtc_resources),}; static const struct resource s2mu005_muic_resources[] = {	DEFINE_RES_IRQ_NAMED(S2MU005_IRQ_MUIC_ATTACH, "attach"),	DEFINE_RES_IRQ_NAMED(S2MU005_IRQ_MUIC_DETACH, "detach"),}; static const struct mfd_cell s2mu005_devs[] = {	MFD_CELL_NAME("s2mu005-charger"),	MFD_CELL_OF("s2mu005-flash", NULL, NULL, 0, 0, "samsung,s2mu005-flash"),	MFD_CELL_OF("s2mu005-muic", s2mu005_muic_resources, NULL, 0, 0, "samsung,s2mu005-muic"),	MFD_CELL_OF("s2mu005-rgb", NULL, NULL, 0, 0, "samsung,s2mu005-rgb"),}; static void sec_pmic_dump_rev(struct sec_pmic_dev *sec_pmic){	unsigned int reg, mask, val; 	switch (sec_pmic->device_type) {	case S2MPG10:	case S2MPG11:		/* For s2mpg1x, the revision is in a different regmap */		return;	case S2MU005:		reg = S2MU005_REG_ID;		mask = S2MU005_ID_MASK;		break;	default:		/* For other device types, REG_ID is always the first register. */		reg = S2MPS11_REG_ID;		mask = ~0;	} 	if (!regmap_read(sec_pmic->regmap_pmic, reg, &val))		dev_dbg(sec_pmic->dev, "Revision: 0x%x\n", field_get(mask, val));} static void sec_pmic_configure(struct sec_pmic_dev *sec_pmic){	int err; 	if (sec_pmic->device_type != S2MPS13X)		return; 	if (sec_pmic->pdata->disable_wrstbi) {		/*		 * If WRSTBI pin is pulled down this feature must be disabled		 * because each Suspend to RAM will trigger buck voltage reset		 * to default values.		 */		err = regmap_update_bits(sec_pmic->regmap_pmic,					 S2MPS13_REG_WRSTBI,					 S2MPS13_REG_WRSTBI_MASK, 0x0);		if (err)			dev_warn(sec_pmic->dev,				 "Cannot initialize WRSTBI config: %d\n",				 err);	}} /* * Only the common platform data elements for s5m8767 are parsed here from the * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and * others have to parse their own platform data elements from device tree. * * The s5m8767 platform data structure is instantiated here and the drivers for * the sub-modules need not instantiate another instance while parsing their * platform data. */static struct sec_platform_data *sec_pmic_parse_dt_pdata(struct device *dev){	struct sec_platform_data *pd; 	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);	if (!pd)		return ERR_PTR(-ENOMEM); 	pd->manual_poweroff = of_property_read_bool(dev->of_node,						    "samsung,s2mps11-acokb-ground");	pd->disable_wrstbi = of_property_read_bool(dev->of_node,						   "samsung,s2mps11-wrstbi-ground");	return pd;} int sec_pmic_probe(struct device *dev, int device_type, unsigned int irq,		   struct regmap *regmap, struct i2c_client *client){	struct regmap_irq_chip_data *irq_data;	struct sec_platform_data *pdata;	const struct mfd_cell *sec_devs;	struct sec_pmic_dev *sec_pmic;	int ret, num_sec_devs; 	sec_pmic = devm_kzalloc(dev, sizeof(*sec_pmic), GFP_KERNEL);	if (!sec_pmic)		return -ENOMEM; 	dev_set_drvdata(dev, sec_pmic);	sec_pmic->dev = dev;	sec_pmic->device_type = device_type;	sec_pmic->i2c = client;	sec_pmic->irq = irq;	sec_pmic->regmap_pmic = regmap; 	pdata = sec_pmic_parse_dt_pdata(sec_pmic->dev);	if (IS_ERR(pdata)) {		ret = PTR_ERR(pdata);		return ret;	} 	sec_pmic->pdata = pdata; 	irq_data = sec_irq_init(sec_pmic);	if (IS_ERR(irq_data))		return PTR_ERR(irq_data); 	dev->coherent_dma_mask = 0;	dev->dma_mask = &dev->coherent_dma_mask; 	pm_runtime_set_active(sec_pmic->dev); 	switch (sec_pmic->device_type) {	case S5M8767X:		sec_devs = s5m8767_devs;		num_sec_devs = ARRAY_SIZE(s5m8767_devs);		break;	case S2DOS05:		sec_devs = s2dos05_devs;		num_sec_devs = ARRAY_SIZE(s2dos05_devs);		break;	case S2MPA01:		sec_devs = s2mpa01_devs;		num_sec_devs = ARRAY_SIZE(s2mpa01_devs);		break;	case S2MPG10:		sec_devs = s2mpg10_devs;		num_sec_devs = ARRAY_SIZE(s2mpg10_devs);		break;	case S2MPG11:		sec_devs = s2mpg11_devs;		num_sec_devs = ARRAY_SIZE(s2mpg11_devs);		break;	case S2MPS11X:		sec_devs = s2mps11_devs;		num_sec_devs = ARRAY_SIZE(s2mps11_devs);		break;	case S2MPS13X:		sec_devs = s2mps13_devs;		num_sec_devs = ARRAY_SIZE(s2mps13_devs);		break;	case S2MPS14X:		sec_devs = s2mps14_devs;		num_sec_devs = ARRAY_SIZE(s2mps14_devs);		break;	case S2MPS15X:		sec_devs = s2mps15_devs;		num_sec_devs = ARRAY_SIZE(s2mps15_devs);		break;	case S2MPU02:		sec_devs = s2mpu02_devs;		num_sec_devs = ARRAY_SIZE(s2mpu02_devs);		break;	case S2MPU05:		sec_devs = s2mpu05_devs;		num_sec_devs = ARRAY_SIZE(s2mpu05_devs);		break;	case S2MU005:		sec_devs = s2mu005_devs;		num_sec_devs = ARRAY_SIZE(s2mu005_devs);		break;	default:		return dev_err_probe(sec_pmic->dev, -EINVAL,				     "Unsupported device type %d\n",				     sec_pmic->device_type);	}	ret = devm_mfd_add_devices(sec_pmic->dev, -1, sec_devs, num_sec_devs,				   NULL, 0, regmap_irq_get_domain(irq_data));	if (ret)		return ret; 	sec_pmic_configure(sec_pmic);	sec_pmic_dump_rev(sec_pmic); 	return ret;}EXPORT_SYMBOL_GPL(sec_pmic_probe); void sec_pmic_shutdown(struct device *dev){	struct sec_pmic_dev *sec_pmic = dev_get_drvdata(dev);	unsigned int reg, mask; 	if (!sec_pmic->pdata->manual_poweroff)		return; 	switch (sec_pmic->device_type) {	case S2MPS11X:		reg = S2MPS11_REG_CTRL1;		mask = S2MPS11_CTRL1_PWRHOLD_MASK;		break;	default:		/*		 * Currently only one board with S2MPS11 needs this, so just		 * ignore the rest.		 */		dev_warn(sec_pmic->dev,			 "Unsupported device %d for manual power off\n",			 sec_pmic->device_type);		return;	} 	regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, 0);}EXPORT_SYMBOL_GPL(sec_pmic_shutdown); static int sec_pmic_suspend(struct device *dev){	struct sec_pmic_dev *sec_pmic = dev_get_drvdata(dev); 	if (device_may_wakeup(dev))		enable_irq_wake(sec_pmic->irq);	/*	 * PMIC IRQ must be disabled during suspend for RTC alarm	 * to work properly.	 * When device is woken up from suspend, an	 * interrupt occurs before resuming I2C bus controller.	 * The interrupt is handled by regmap_irq_thread which tries	 * to read RTC registers. This read fails (I2C is still	 * suspended) and RTC Alarm interrupt is disabled.	 */	disable_irq(sec_pmic->irq); 	return 0;} static int sec_pmic_resume(struct device *dev){	struct sec_pmic_dev *sec_pmic = dev_get_drvdata(dev); 	if (device_may_wakeup(dev))		disable_irq_wake(sec_pmic->irq);	enable_irq(sec_pmic->irq); 	return 0;} DEFINE_SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume);EXPORT_SYMBOL_GPL(sec_pmic_pm_ops); MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");MODULE_AUTHOR("André Draszik <andre.draszik@linaro.org>");MODULE_DESCRIPTION("Core driver for the Samsung S5M");MODULE_LICENSE("GPL");