--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+//
+// regulator driver for the PF1550
+//
+// Copyright (C) 2016 Freescale Semiconductor, Inc.
+// Robin Gong <yibin.gong@freescale.com>
+//
+// Portions Copyright (c) 2025 Savoir-faire Linux Inc.
+// Samuel Kayode <samuel.kayode@savoirfairelinux.com>
+//
+
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/pf1550.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+
+#define PF1550_REGULATOR_IRQ_NR 11
+#define PF1550_MAX_REGULATOR 7
+
+struct pf1550_desc {
+ struct regulator_desc desc;
+ unsigned char stby_reg;
+ unsigned char stby_mask;
+ unsigned char stby_enable_reg;
+ unsigned char stby_enable_mask;
+};
+
+struct pf1550_regulator_info {
+ struct device *dev;
+ const struct pf1550_ddata *pf1550;
+ struct pf1550_desc regulator_descs[PF1550_MAX_REGULATOR];
+ struct regulator_dev *rdevs[PF1550_MAX_REGULATOR];
+};
+
+static const int pf1550_sw12_volts[] = {
+ 1100000, 1200000, 1350000, 1500000, 1800000, 2500000, 3000000, 3300000,
+};
+
+static const int pf1550_ldo13_volts[] = {
+ 750000, 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000,
+ 1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000,
+ 1800000, 1900000, 2000000, 2100000, 2200000, 2300000, 2400000, 2500000,
+ 2600000, 2700000, 2800000, 2900000, 3000000, 3100000, 3200000, 3300000,
+};
+
+static int pf1550_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
+{
+ int id = rdev_get_id(rdev);
+ unsigned int ramp_bits = 0;
+ int ret;
+
+ if (id > PF1550_VREFDDR)
+ return -EACCES;
+
+ if (ramp_delay < 0 || ramp_delay > 6250)
+ return -EINVAL;
+
+ ramp_delay = 6250 / ramp_delay;
+ ramp_bits = ramp_delay >> 1;
+
+ ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg + 4, 0x10,
+ ramp_bits << 4);
+ if (ret < 0)
+ dev_err(&rdev->dev, "ramp failed, err %d\n", ret);
+
+ return ret;
+}
+
+static int pf1550_set_suspend_enable(struct regulator_dev *rdev)
+{
+ const struct pf1550_desc *desc = container_of(rdev->desc,
+ struct pf1550_desc,
+ desc);
+ unsigned int val = desc->stby_enable_mask;
+
+ return regmap_update_bits(rdev->regmap, desc->stby_enable_reg,
+ desc->stby_enable_mask, val);
+}
+
+static int pf1550_set_suspend_disable(struct regulator_dev *rdev)
+{
+ const struct pf1550_desc *desc = container_of(rdev->desc,
+ struct pf1550_desc,
+ desc);
+
+ return regmap_update_bits(rdev->regmap, desc->stby_enable_reg,
+ desc->stby_enable_mask, 0);
+}
+
+static int pf1550_buck_set_table_suspend_voltage(struct regulator_dev *rdev,
+ int uV)
+{
+ const struct pf1550_desc *desc = container_of(rdev->desc,
+ struct pf1550_desc,
+ desc);
+ int ret;
+
+ ret = regulator_map_voltage_ascend(rdev, uV, uV);
+ if (ret < 0) {
+ dev_err(rdev_get_dev(rdev), "failed to map %i uV\n", uV);
+ return ret;
+ }
+
+ return regmap_update_bits(rdev->regmap, desc->stby_reg,
+ desc->stby_mask, ret);
+}
+
+static int pf1550_buck_set_linear_suspend_voltage(struct regulator_dev *rdev,
+ int uV)
+{
+ const struct pf1550_desc *desc = container_of(rdev->desc,
+ struct pf1550_desc,
+ desc);
+ int ret;
+
+ ret = regulator_map_voltage_linear(rdev, uV, uV);
+ if (ret < 0) {
+ dev_err(rdev_get_dev(rdev), "failed to map %i uV\n", uV);
+ return ret;
+ }
+
+ return regmap_update_bits(rdev->regmap, desc->stby_reg,
+ desc->stby_mask, ret);
+}
+
+static const struct regulator_ops pf1550_sw1_ops = {
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .set_suspend_enable = pf1550_set_suspend_enable,
+ .set_suspend_disable = pf1550_set_suspend_disable,
+ .is_enabled = regulator_is_enabled_regmap,
+ .list_voltage = regulator_list_voltage_table,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_suspend_voltage = pf1550_buck_set_table_suspend_voltage,
+ .map_voltage = regulator_map_voltage_ascend,
+ .set_ramp_delay = pf1550_set_ramp_delay,
+};
+
+static const struct regulator_ops pf1550_sw2_ops = {
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .set_suspend_enable = pf1550_set_suspend_enable,
+ .set_suspend_disable = pf1550_set_suspend_disable,
+ .is_enabled = regulator_is_enabled_regmap,
+ .list_voltage = regulator_list_voltage_linear,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_suspend_voltage = pf1550_buck_set_linear_suspend_voltage,
+ .map_voltage = regulator_map_voltage_linear,
+ .set_ramp_delay = pf1550_set_ramp_delay,
+};
+
+static const struct regulator_ops pf1550_ldo1_ops = {
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .set_suspend_enable = pf1550_set_suspend_enable,
+ .set_suspend_disable = pf1550_set_suspend_disable,
+ .is_enabled = regulator_is_enabled_regmap,
+ .list_voltage = regulator_list_voltage_table,
+ .map_voltage = regulator_map_voltage_ascend,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+};
+
+static const struct regulator_ops pf1550_ldo2_ops = {
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .set_suspend_enable = pf1550_set_suspend_enable,
+ .set_suspend_disable = pf1550_set_suspend_disable,
+ .is_enabled = regulator_is_enabled_regmap,
+ .list_voltage = regulator_list_voltage_linear,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .map_voltage = regulator_map_voltage_linear,
+};
+
+static const struct regulator_ops pf1550_fixed_ops = {
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .set_suspend_enable = pf1550_set_suspend_enable,
+ .set_suspend_disable = pf1550_set_suspend_disable,
+ .is_enabled = regulator_is_enabled_regmap,
+ .list_voltage = regulator_list_voltage_linear,
+};
+
+#define PF_VREF(_chip, match, _name, voltage) { \
+ .desc = { \
+ .name = #_name, \
+ .of_match = of_match_ptr(match), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .n_voltages = 1, \
+ .ops = &pf1550_fixed_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = _chip ## _ ## _name, \
+ .owner = THIS_MODULE, \
+ .min_uV = (voltage), \
+ .enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
+ .enable_mask = 0x1, \
+ }, \
+ .stby_enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
+ .stby_enable_mask = 0x2, \
+}
+
+#define PF_SW(_chip, match, _name, min, max, mask, step) { \
+ .desc = { \
+ .name = #_name, \
+ .of_match = of_match_ptr(match), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .n_voltages = ((max) - (min)) / (step) + 1, \
+ .ops = &pf1550_sw2_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = _chip ## _ ## _name, \
+ .owner = THIS_MODULE, \
+ .min_uV = (min), \
+ .uV_step = (step), \
+ .linear_min_sel = 0, \
+ .vsel_reg = _chip ## _PMIC_REG_ ## _name ## _VOLT, \
+ .vsel_mask = (mask), \
+ .enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
+ .enable_mask = 0x1, \
+ }, \
+ .stby_reg = _chip ## _PMIC_REG_ ## _name ## _STBY_VOLT, \
+ .stby_mask = (mask), \
+ .stby_enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
+ .stby_enable_mask = 0x2, \
+}
+
+#define PF_LDO1(_chip, match, _name, mask, voltages) { \
+ .desc = { \
+ .name = #_name, \
+ .of_match = of_match_ptr(match), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .n_voltages = ARRAY_SIZE(voltages), \
+ .ops = &pf1550_ldo1_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = _chip ## _ ## _name, \
+ .owner = THIS_MODULE, \
+ .volt_table = voltages, \
+ .vsel_reg = _chip ## _PMIC_REG_ ## _name ## _VOLT, \
+ .vsel_mask = (mask), \
+ .enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
+ .enable_mask = 0x1, \
+ }, \
+ .stby_enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
+ .stby_enable_mask = 0x2, \
+}
+
+#define PF_LDO2(_chip, match, _name, mask, min, max, step) { \
+ .desc = { \
+ .name = #_name, \
+ .of_match = of_match_ptr(match), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .n_voltages = ((max) - (min)) / (step) + 1, \
+ .ops = &pf1550_ldo2_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = _chip ## _ ## _name, \
+ .owner = THIS_MODULE, \
+ .min_uV = (min), \
+ .uV_step = (step), \
+ .linear_min_sel = 0, \
+ .vsel_reg = _chip ## _PMIC_REG_ ## _name ## _VOLT, \
+ .vsel_mask = (mask), \
+ .enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
+ .enable_mask = 0x1, \
+ }, \
+ .stby_enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
+ .stby_enable_mask = 0x2, \
+}
+
+static struct pf1550_desc pf1550_regulators[] = {
+ PF_SW(PF1550, "sw1", SW1, 600000, 1387500, 0x3f, 12500),
+ PF_SW(PF1550, "sw2", SW2, 600000, 1387500, 0x3f, 12500),
+ PF_SW(PF1550, "sw3", SW3, 1800000, 3300000, 0xf, 100000),
+ PF_VREF(PF1550, "vrefddr", VREFDDR, 1200000),
+ PF_LDO1(PF1550, "ldo1", LDO1, 0x1f, pf1550_ldo13_volts),
+ PF_LDO2(PF1550, "ldo2", LDO2, 0xf, 1800000, 3300000, 100000),
+ PF_LDO1(PF1550, "ldo3", LDO3, 0x1f, pf1550_ldo13_volts),
+};
+
+static irqreturn_t pf1550_regulator_irq_handler(int irq, void *data)
+{
+ struct pf1550_regulator_info *info = data;
+ struct device *dev = info->dev;
+ struct platform_device *pdev = to_platform_device(dev);
+ int i, irq_type = -1;
+ unsigned int event;
+
+ for (i = 0; i < PF1550_REGULATOR_IRQ_NR; i++)
+ if (irq == platform_get_irq(pdev, i))
+ irq_type = i;
+
+ switch (irq_type) {
+ /* The _LS interrupts indicate over-current event. The _HS interrupts
+ * which are more accurate and can detect catastrophic faults, issue
+ * an error event. The current limit FAULT interrupt is similar to the
+ * _HS'
+ */
+ case PF1550_PMIC_IRQ_SW1_LS:
+ case PF1550_PMIC_IRQ_SW2_LS:
+ case PF1550_PMIC_IRQ_SW3_LS:
+ event = REGULATOR_EVENT_OVER_CURRENT_WARN;
+ for (i = 0; i < PF1550_MAX_REGULATOR; i++)
+ if (!strcmp(rdev_get_name(info->rdevs[i]), "SW3"))
+ regulator_notifier_call_chain(info->rdevs[i],
+ event, NULL);
+ break;
+ case PF1550_PMIC_IRQ_SW1_HS:
+ case PF1550_PMIC_IRQ_SW2_HS:
+ case PF1550_PMIC_IRQ_SW3_HS:
+ event = REGULATOR_EVENT_OVER_CURRENT;
+ for (i = 0; i < PF1550_MAX_REGULATOR; i++)
+ if (!strcmp(rdev_get_name(info->rdevs[i]), "SW3"))
+ regulator_notifier_call_chain(info->rdevs[i],
+ event, NULL);
+ break;
+ case PF1550_PMIC_IRQ_LDO1_FAULT:
+ case PF1550_PMIC_IRQ_LDO2_FAULT:
+ case PF1550_PMIC_IRQ_LDO3_FAULT:
+ event = REGULATOR_EVENT_OVER_CURRENT;
+ for (i = 0; i < PF1550_MAX_REGULATOR; i++)
+ if (!strcmp(rdev_get_name(info->rdevs[i]), "LDO3"))
+ regulator_notifier_call_chain(info->rdevs[i],
+ event, NULL);
+ break;
+ case PF1550_PMIC_IRQ_TEMP_110:
+ case PF1550_PMIC_IRQ_TEMP_125:
+ event = REGULATOR_EVENT_OVER_TEMP;
+ for (i = 0; i < PF1550_MAX_REGULATOR; i++)
+ regulator_notifier_call_chain(info->rdevs[i],
+ event, NULL);
+ break;
+ default:
+ dev_err(dev, "regulator interrupt: irq %d occurred\n",
+ irq_type);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int pf1550_regulator_probe(struct platform_device *pdev)
+{
+ const struct pf1550_ddata *pf1550 = dev_get_drvdata(pdev->dev.parent);
+ struct regulator_config config = { };
+ struct pf1550_regulator_info *info;
+ int i, irq = -1, ret = 0;
+
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ config.regmap = dev_get_regmap(pf1550->dev, NULL);
+ if (!config.regmap)
+ return dev_err_probe(&pdev->dev, -ENODEV,
+ "failed to get parent regmap\n");
+
+ config.dev = pf1550->dev;
+ config.regmap = pf1550->regmap;
+ info->dev = &pdev->dev;
+ info->pf1550 = pf1550;
+
+ memcpy(info->regulator_descs, pf1550_regulators,
+ sizeof(info->regulator_descs));
+
+ for (i = 0; i < ARRAY_SIZE(pf1550_regulators); i++) {
+ struct regulator_desc *desc;
+
+ desc = &info->regulator_descs[i].desc;
+
+ if ((desc->id == PF1550_SW2 && !pf1550->dvs2_enable) ||
+ (desc->id == PF1550_SW1 && !pf1550->dvs1_enable)) {
+ /* OTP_SW2_DVS_ENB == 1? or OTP_SW1_DVS_ENB == 1? */
+ desc->volt_table = pf1550_sw12_volts;
+ desc->n_voltages = ARRAY_SIZE(pf1550_sw12_volts);
+ desc->ops = &pf1550_sw1_ops;
+ }
+
+ info->rdevs[i] = devm_regulator_register(&pdev->dev, desc,
+ &config);
+ if (IS_ERR(info->rdevs[i]))
+ return dev_err_probe(&pdev->dev,
+ PTR_ERR(info->rdevs[i]),
+ "failed to initialize regulator-%d\n",
+ i);
+ }
+
+ platform_set_drvdata(pdev, info);
+
+ for (i = 0; i < PF1550_REGULATOR_IRQ_NR; i++) {
+ irq = platform_get_irq(pdev, i);
+ if (irq < 0)
+ return irq;
+
+ ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+ pf1550_regulator_irq_handler,
+ IRQF_NO_SUSPEND,
+ "pf1550-regulator", info);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "failed: irq request (IRQ: %d)\n",
+ i);
+ }
+
+ return 0;
+}
+
+static const struct platform_device_id pf1550_regulator_id[] = {
+ { "pf1550-regulator", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, pf1550_regulator_id);
+
+static struct platform_driver pf1550_regulator_driver = {
+ .driver = {
+ .name = "pf1550-regulator",
+ },
+ .probe = pf1550_regulator_probe,
+ .id_table = pf1550_regulator_id,
+};
+module_platform_driver(pf1550_regulator_driver);
+
+MODULE_DESCRIPTION("NXP PF1550 regulator driver");
+MODULE_AUTHOR("Robin Gong <yibin.gong@freescale.com>");
+MODULE_LICENSE("GPL");
projects / thirdparty / linux.git / commitdiff
