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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: Bhargav Raviprakash <bhargav.r@ltts.com> Acked-by: Julien Panis <jpanis@baylibre.com> Acked-by: Greg 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: Lee Jones <lee@kernel.org>
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@ -1,6 +1,6 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* PFSM (Pre-configurable Finite State Machine) driver for TI TPS6594/TPS6593/LP8764 PMICs
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* PFSM (Pre-configurable Finite State Machine) driver for TI TPS65224/TPS6594/TPS6593/LP8764 PMICs
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*
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* Copyright (C) 2023 BayLibre Incorporated - https://www.baylibre.com/
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*/
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@ -39,10 +39,12 @@
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*
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* @miscdev: misc device infos
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* @regmap: regmap for accessing the device registers
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* @chip_id: chip identifier of the device
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*/
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struct tps6594_pfsm {
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struct miscdevice miscdev;
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struct regmap *regmap;
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unsigned long chip_id;
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};
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static ssize_t tps6594_pfsm_read(struct file *f, char __user *buf,
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@ -133,21 +135,29 @@ static long tps6594_pfsm_ioctl(struct file *f, unsigned int cmd, unsigned long a
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struct tps6594_pfsm *pfsm = TPS6594_FILE_TO_PFSM(f);
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struct pmic_state_opt state_opt;
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void __user *argp = (void __user *)arg;
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unsigned int regmap_reg, mask;
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int ret = -ENOIOCTLCMD;
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switch (cmd) {
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case PMIC_GOTO_STANDBY:
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/* Disable LP mode */
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ret = regmap_clear_bits(pfsm->regmap, TPS6594_REG_RTC_CTRL_2,
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TPS6594_BIT_LP_STANDBY_SEL);
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if (ret)
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return ret;
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/* Disable LP mode on TPS6594 Family PMIC */
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if (pfsm->chip_id != TPS65224) {
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ret = regmap_clear_bits(pfsm->regmap, TPS6594_REG_RTC_CTRL_2,
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TPS6594_BIT_LP_STANDBY_SEL);
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if (ret)
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return ret;
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}
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/* Force trigger */
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ret = regmap_write_bits(pfsm->regmap, TPS6594_REG_FSM_I2C_TRIGGERS,
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TPS6594_BIT_TRIGGER_I2C(0), TPS6594_BIT_TRIGGER_I2C(0));
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break;
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case PMIC_GOTO_LP_STANDBY:
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/* TPS65224 does not support LP STANDBY */
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if (pfsm->chip_id == TPS65224)
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return ret;
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/* Enable LP mode */
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ret = regmap_set_bits(pfsm->regmap, TPS6594_REG_RTC_CTRL_2,
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TPS6594_BIT_LP_STANDBY_SEL);
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@ -169,6 +179,10 @@ static long tps6594_pfsm_ioctl(struct file *f, unsigned int cmd, unsigned long a
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TPS6594_BIT_NSLEEP1B | TPS6594_BIT_NSLEEP2B);
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break;
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case PMIC_SET_MCU_ONLY_STATE:
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/* TPS65224 does not support MCU_ONLY_STATE */
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if (pfsm->chip_id == TPS65224)
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return ret;
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if (copy_from_user(&state_opt, argp, sizeof(state_opt)))
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return -EFAULT;
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@ -192,14 +206,20 @@ static long tps6594_pfsm_ioctl(struct file *f, unsigned int cmd, unsigned long a
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return -EFAULT;
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/* Configure wake-up destination */
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if (pfsm->chip_id == TPS65224) {
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regmap_reg = TPS65224_REG_STARTUP_CTRL;
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mask = TPS65224_MASK_STARTUP_DEST;
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} else {
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regmap_reg = TPS6594_REG_RTC_CTRL_2;
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mask = TPS6594_MASK_STARTUP_DEST;
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}
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if (state_opt.mcu_only_startup_dest)
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ret = regmap_write_bits(pfsm->regmap, TPS6594_REG_RTC_CTRL_2,
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TPS6594_MASK_STARTUP_DEST,
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TPS6594_STARTUP_DEST_MCU_ONLY);
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ret = regmap_write_bits(pfsm->regmap, regmap_reg,
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mask, TPS6594_STARTUP_DEST_MCU_ONLY);
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else
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ret = regmap_write_bits(pfsm->regmap, TPS6594_REG_RTC_CTRL_2,
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TPS6594_MASK_STARTUP_DEST,
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TPS6594_STARTUP_DEST_ACTIVE);
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ret = regmap_write_bits(pfsm->regmap, regmap_reg,
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mask, TPS6594_STARTUP_DEST_ACTIVE);
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if (ret)
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return ret;
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@ -211,7 +231,8 @@ static long tps6594_pfsm_ioctl(struct file *f, unsigned int cmd, unsigned long a
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/* Modify NSLEEP1-2 bits */
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ret = regmap_clear_bits(pfsm->regmap, TPS6594_REG_FSM_NSLEEP_TRIGGERS,
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TPS6594_BIT_NSLEEP2B);
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pfsm->chip_id == TPS65224 ?
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TPS6594_BIT_NSLEEP1B : TPS6594_BIT_NSLEEP2B);
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break;
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}
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@ -262,6 +283,7 @@ static int tps6594_pfsm_probe(struct platform_device *pdev)
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tps->chip_id, tps->reg);
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pfsm->miscdev.fops = &tps6594_pfsm_fops;
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pfsm->miscdev.parent = dev->parent;
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pfsm->chip_id = tps->chip_id;
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for (i = 0 ; i < pdev->num_resources ; i++) {
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irq = platform_get_irq_byname(pdev, pdev->resource[i].name);
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