Commit 91020aec authored by Bhargav Raviprakash's avatar Bhargav Raviprakash Committed by Lee Jones
Browse files

misc: tps6594-pfsm: Add TI TPS65224 PMIC PFSM 



Add support for TPS65224 PFSM in the TPS6594 PFSM driver as they share
significant functionality.

Signed-off-by: default avatarBhargav Raviprakash <bhargav.r@ltts.com>
Acked-by: default avatarJulien Panis <jpanis@baylibre.com>
Acked-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/0109018f2fdc9dc4-db5a45c0-0148-48cc-8462-d1c5b577a4bd-000000@ap-south-1.amazonses.com


Signed-off-by: default avatarLee Jones <lee@kernel.org>
parent 9d855b81

drivers/misc/tps6594-pfsm.c

+35 −13
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/*

 * PFSM (Pre-configurable Finite State Machine) driver for TI TPS6594/TPS6593/LP8764 PMICs

 * PFSM (Pre-configurable Finite State Machine) driver for TI TPS65224/TPS6594/TPS6593/LP8764 PMICs

 *

 * Copyright (C) 2023 BayLibre Incorporated - https://www.baylibre.com/

 */
@@ -39,10 +39,12 @@ 
 *

 * @miscdev: misc device infos

 * @regmap:  regmap for accessing the device registers

 * @chip_id: chip identifier of the device

 */

struct tps6594_pfsm {

	struct miscdevice miscdev;

	struct regmap *regmap;

	unsigned long chip_id;

};



static ssize_t tps6594_pfsm_read(struct file *f, char __user *buf,
@@ -133,21 +135,29 @@ static long tps6594_pfsm_ioctl(struct file *f, unsigned int cmd, unsigned long a 
	struct tps6594_pfsm *pfsm = TPS6594_FILE_TO_PFSM(f);

	struct pmic_state_opt state_opt;

	void __user *argp = (void __user *)arg;

	unsigned int regmap_reg, mask;

	int ret = -ENOIOCTLCMD;



	switch (cmd) {

	case PMIC_GOTO_STANDBY:

		/* Disable LP mode */

		/* Disable LP mode on TPS6594 Family PMIC */

		if (pfsm->chip_id != TPS65224) {

			ret = regmap_clear_bits(pfsm->regmap, TPS6594_REG_RTC_CTRL_2,

						TPS6594_BIT_LP_STANDBY_SEL);



			if (ret)

				return ret;

		}



		/* Force trigger */

		ret = regmap_write_bits(pfsm->regmap, TPS6594_REG_FSM_I2C_TRIGGERS,

					TPS6594_BIT_TRIGGER_I2C(0), TPS6594_BIT_TRIGGER_I2C(0));

		break;

	case PMIC_GOTO_LP_STANDBY:

		/* TPS65224 does not support LP STANDBY */

		if (pfsm->chip_id == TPS65224)

			return ret;



		/* Enable LP mode */

		ret = regmap_set_bits(pfsm->regmap, TPS6594_REG_RTC_CTRL_2,

				      TPS6594_BIT_LP_STANDBY_SEL);
@@ -169,6 +179,10 @@ static long tps6594_pfsm_ioctl(struct file *f, unsigned int cmd, unsigned long a 
				      TPS6594_BIT_NSLEEP1B | TPS6594_BIT_NSLEEP2B);

		break;

	case PMIC_SET_MCU_ONLY_STATE:

		/* TPS65224 does not support MCU_ONLY_STATE */

		if (pfsm->chip_id == TPS65224)

			return ret;



		if (copy_from_user(&state_opt, argp, sizeof(state_opt)))

			return -EFAULT;
@@ -192,14 +206,20 @@ static long tps6594_pfsm_ioctl(struct file *f, unsigned int cmd, unsigned long a 
			return -EFAULT;



		/* Configure wake-up destination */

		if (pfsm->chip_id == TPS65224) {

			regmap_reg = TPS65224_REG_STARTUP_CTRL;

			mask = TPS65224_MASK_STARTUP_DEST;

		} else {

			regmap_reg = TPS6594_REG_RTC_CTRL_2;

			mask = TPS6594_MASK_STARTUP_DEST;

		}



		if (state_opt.mcu_only_startup_dest)

			ret = regmap_write_bits(pfsm->regmap, TPS6594_REG_RTC_CTRL_2,

						TPS6594_MASK_STARTUP_DEST,

						TPS6594_STARTUP_DEST_MCU_ONLY);

			ret = regmap_write_bits(pfsm->regmap, regmap_reg,

						mask, TPS6594_STARTUP_DEST_MCU_ONLY);

		else

			ret = regmap_write_bits(pfsm->regmap, TPS6594_REG_RTC_CTRL_2,

						TPS6594_MASK_STARTUP_DEST,

						TPS6594_STARTUP_DEST_ACTIVE);

			ret = regmap_write_bits(pfsm->regmap, regmap_reg,

						mask, TPS6594_STARTUP_DEST_ACTIVE);

		if (ret)

			return ret;
@@ -211,7 +231,8 @@ static long tps6594_pfsm_ioctl(struct file *f, unsigned int cmd, unsigned long a 


		/* Modify NSLEEP1-2 bits */

		ret = regmap_clear_bits(pfsm->regmap, TPS6594_REG_FSM_NSLEEP_TRIGGERS,

					TPS6594_BIT_NSLEEP2B);

					pfsm->chip_id == TPS65224 ?

					TPS6594_BIT_NSLEEP1B : TPS6594_BIT_NSLEEP2B);

		break;

	}
@@ -262,6 +283,7 @@ static int tps6594_pfsm_probe(struct platform_device *pdev) 
					    tps->chip_id, tps->reg);

	pfsm->miscdev.fops = &tps6594_pfsm_fops;

	pfsm->miscdev.parent = dev->parent;

	pfsm->chip_id = tps->chip_id;



	for (i = 0 ; i < pdev->num_resources ; i++) {

		irq = platform_get_irq_byname(pdev, pdev->resource[i].name);