1 // SPDX-License-Identifier: GPL-2.0
3  * PFSM (Pre-configurable Finite State Machine) driver for TI TPS6594/TPS6593/LP8764 PMICs
5  * Copyright (C) 2023 BayLibre Incorporated - https://www.baylibre.com/
35 #define TPS6594_FILE_TO_PFSM(f) container_of((f)->private_data, struct tps6594_pfsm, miscdev)
38  * struct tps6594_pfsm - device private data structure
58 		return -EINVAL;  in tps6594_pfsm_read()
61 	if (count > TPS6594_PMIC_MAX_POS - pos)  in tps6594_pfsm_read()
62 		count = TPS6594_PMIC_MAX_POS - pos;  in tps6594_pfsm_read()
65 		ret = regmap_read(pfsm->regmap, pos + i, &val);  in tps6594_pfsm_read()
70 			return -EFAULT;  in tps6594_pfsm_read()
88 		return -EINVAL;  in tps6594_pfsm_write()
91 	if (count > TPS6594_PMIC_MAX_POS - pos)  in tps6594_pfsm_write()
92 		count = TPS6594_PMIC_MAX_POS - pos;  in tps6594_pfsm_write()
96 			return -EFAULT;  in tps6594_pfsm_write()
98 		ret = regmap_write(pfsm->regmap, pos + i, val);  in tps6594_pfsm_write()
136 	int ret = -ENOIOCTLCMD;  in tps6594_pfsm_ioctl()
141 		ret = regmap_clear_bits(pfsm->regmap, TPS6594_REG_RTC_CTRL_2,  in tps6594_pfsm_ioctl()
147 		ret = regmap_write_bits(pfsm->regmap, TPS6594_REG_FSM_I2C_TRIGGERS,  in tps6594_pfsm_ioctl()
152 		ret = regmap_set_bits(pfsm->regmap, TPS6594_REG_RTC_CTRL_2,  in tps6594_pfsm_ioctl()
158 		ret = regmap_write_bits(pfsm->regmap, TPS6594_REG_FSM_I2C_TRIGGERS,  in tps6594_pfsm_ioctl()
163 		ret = regmap_write_bits(pfsm->regmap, TPS6594_REG_FSM_I2C_TRIGGERS,  in tps6594_pfsm_ioctl()
167 		/* Modify NSLEEP1-2 bits */  in tps6594_pfsm_ioctl()
168 		ret = regmap_set_bits(pfsm->regmap, TPS6594_REG_FSM_NSLEEP_TRIGGERS,  in tps6594_pfsm_ioctl()
173 			return -EFAULT;  in tps6594_pfsm_ioctl()
176 		ret = tps6594_pfsm_configure_ret_trig(pfsm->regmap, state_opt.gpio_retention,  in tps6594_pfsm_ioctl()
181 		/* Modify NSLEEP1-2 bits */  in tps6594_pfsm_ioctl()
182 		ret = regmap_clear_bits(pfsm->regmap, TPS6594_REG_FSM_NSLEEP_TRIGGERS,  in tps6594_pfsm_ioctl()
187 		ret = regmap_set_bits(pfsm->regmap, TPS6594_REG_FSM_NSLEEP_TRIGGERS,  in tps6594_pfsm_ioctl()
192 			return -EFAULT;  in tps6594_pfsm_ioctl()
194 		/* Configure wake-up destination */  in tps6594_pfsm_ioctl()
196 			ret = regmap_write_bits(pfsm->regmap, TPS6594_REG_RTC_CTRL_2,  in tps6594_pfsm_ioctl()
200 			ret = regmap_write_bits(pfsm->regmap, TPS6594_REG_RTC_CTRL_2,  in tps6594_pfsm_ioctl()
207 		ret = tps6594_pfsm_configure_ret_trig(pfsm->regmap, state_opt.gpio_retention,  in tps6594_pfsm_ioctl()
212 		/* Modify NSLEEP1-2 bits */  in tps6594_pfsm_ioctl()
213 		ret = regmap_clear_bits(pfsm->regmap, TPS6594_REG_FSM_NSLEEP_TRIGGERS,  in tps6594_pfsm_ioctl()
235 	for (i = 0 ; i < pdev->num_resources ; i++) {  in tps6594_pfsm_isr()
236 		if (irq == platform_get_irq_byname(pdev, pdev->resource[i].name)) {  in tps6594_pfsm_isr()
237 			dev_err(pdev->dev.parent, "%s event detected\n", pdev->resource[i].name);  in tps6594_pfsm_isr()
248 	struct tps6594 *tps = dev_get_drvdata(pdev->dev.parent);  in tps6594_pfsm_probe()
249 	struct device *dev = &pdev->dev;  in tps6594_pfsm_probe()
256 		return -ENOMEM;  in tps6594_pfsm_probe()
258 	pfsm->regmap = tps->regmap;  in tps6594_pfsm_probe()
260 	pfsm->miscdev.minor = MISC_DYNAMIC_MINOR;  in tps6594_pfsm_probe()
261 	pfsm->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "pfsm-%ld-0x%02x",  in tps6594_pfsm_probe()
262 					    tps->chip_id, tps->reg);  in tps6594_pfsm_probe()
263 	if (!pfsm->miscdev.name)  in tps6594_pfsm_probe()
264 		return -ENOMEM;  in tps6594_pfsm_probe()
266 	pfsm->miscdev.fops = &tps6594_pfsm_fops;  in tps6594_pfsm_probe()
267 	pfsm->miscdev.parent = dev->parent;  in tps6594_pfsm_probe()
269 	for (i = 0 ; i < pdev->num_resources ; i++) {  in tps6594_pfsm_probe()
270 		irq = platform_get_irq_byname(pdev, pdev->resource[i].name);  in tps6594_pfsm_probe()
276 						pdev->resource[i].name, pdev);  in tps6594_pfsm_probe()
283 	return misc_register(&pfsm->miscdev);  in tps6594_pfsm_probe()
290 	misc_deregister(&pfsm->miscdev);  in tps6594_pfsm_remove()
295 		.name = "tps6594-pfsm",
303 MODULE_ALIAS("platform:tps6594-pfsm");
305 MODULE_DESCRIPTION("TPS6594 Pre-configurable Finite State Machine Driver");