--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+//
+// Regulator driver for TPS68470 PMIC
+//
+// Copyright (c) 2021 Red Hat Inc.
+// Copyright (C) 2018 Intel Corporation
+//
+// Authors:
+// Hans de Goede <hdegoede@redhat.com>
+// Zaikuo Wang <zaikuo.wang@intel.com>
+// Tianshu Qiu <tian.shu.qiu@intel.com>
+// Jian Xu Zheng <jian.xu.zheng@intel.com>
+// Yuning Pu <yuning.pu@intel.com>
+// Rajmohan Mani <rajmohan.mani@intel.com>
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mfd/tps68470.h>
+#include <linux/module.h>
+#include <linux/platform_data/tps68470.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+
+struct tps68470_regulator_data {
+ struct clk *clk;
+};
+
+#define TPS68470_REGULATOR(_name, _id, _ops, _n, \
+ _vr, _vm, _er, _em, _lr, _nlr) \
+ [TPS68470_ ## _name] = { \
+ .name = # _name, \
+ .id = _id, \
+ .ops = &_ops, \
+ .n_voltages = _n, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .vsel_reg = _vr, \
+ .vsel_mask = _vm, \
+ .enable_reg = _er, \
+ .enable_mask = _em, \
+ .linear_ranges = _lr, \
+ .n_linear_ranges = _nlr, \
+ }
+
+static const struct linear_range tps68470_ldo_ranges[] = {
+ REGULATOR_LINEAR_RANGE(875000, 0, 125, 17800),
+};
+
+static const struct linear_range tps68470_core_ranges[] = {
+ REGULATOR_LINEAR_RANGE(900000, 0, 42, 25000),
+};
+
+static int tps68470_regulator_enable(struct regulator_dev *rdev)
+{
+ struct tps68470_regulator_data *data = rdev->reg_data;
+ int ret;
+
+ /* The Core buck regulator needs the PMIC's PLL to be enabled */
+ if (rdev->desc->id == TPS68470_CORE) {
+ ret = clk_prepare_enable(data->clk);
+ if (ret) {
+ dev_err(&rdev->dev, "Error enabling TPS68470 clock\n");
+ return ret;
+ }
+ }
+
+ return regulator_enable_regmap(rdev);
+}
+
+static int tps68470_regulator_disable(struct regulator_dev *rdev)
+{
+ struct tps68470_regulator_data *data = rdev->reg_data;
+
+ if (rdev->desc->id == TPS68470_CORE)
+ clk_disable_unprepare(data->clk);
+
+ return regulator_disable_regmap(rdev);
+}
+
+/* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
+static const struct regulator_ops tps68470_regulator_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = tps68470_regulator_enable,
+ .disable = tps68470_regulator_disable,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .list_voltage = regulator_list_voltage_linear_range,
+ .map_voltage = regulator_map_voltage_linear_range,
+};
+
+static const struct regulator_ops tps68470_always_on_reg_ops = {
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .list_voltage = regulator_list_voltage_linear_range,
+ .map_voltage = regulator_map_voltage_linear_range,
+};
+
+static const struct regulator_desc regulators[] = {
+ TPS68470_REGULATOR(CORE, TPS68470_CORE, tps68470_regulator_ops, 43,
+ TPS68470_REG_VDVAL, TPS68470_VDVAL_DVOLT_MASK,
+ TPS68470_REG_VDCTL, TPS68470_VDCTL_EN_MASK,
+ tps68470_core_ranges, ARRAY_SIZE(tps68470_core_ranges)),
+ TPS68470_REGULATOR(ANA, TPS68470_ANA, tps68470_regulator_ops, 126,
+ TPS68470_REG_VAVAL, TPS68470_VAVAL_AVOLT_MASK,
+ TPS68470_REG_VACTL, TPS68470_VACTL_EN_MASK,
+ tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
+ TPS68470_REGULATOR(VCM, TPS68470_VCM, tps68470_regulator_ops, 126,
+ TPS68470_REG_VCMVAL, TPS68470_VCMVAL_VCVOLT_MASK,
+ TPS68470_REG_VCMCTL, TPS68470_VCMCTL_EN_MASK,
+ tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
+ TPS68470_REGULATOR(VIO, TPS68470_VIO, tps68470_always_on_reg_ops, 126,
+ TPS68470_REG_VIOVAL, TPS68470_VIOVAL_IOVOLT_MASK,
+ 0, 0,
+ tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
+/*
+ * (1) This regulator must have the same voltage as VIO if S_IO LDO is used to
+ * power a sensor/VCM which I2C is daisy chained behind the PMIC.
+ * (2) If there is no I2C daisy chain it can be set freely.
+ */
+ TPS68470_REGULATOR(VSIO, TPS68470_VSIO, tps68470_regulator_ops, 126,
+ TPS68470_REG_VSIOVAL, TPS68470_VSIOVAL_IOVOLT_MASK,
+ TPS68470_REG_S_I2C_CTL, TPS68470_S_I2C_CTL_EN_MASK,
+ tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
+ TPS68470_REGULATOR(AUX1, TPS68470_AUX1, tps68470_regulator_ops, 126,
+ TPS68470_REG_VAUX1VAL, TPS68470_VAUX1VAL_AUX1VOLT_MASK,
+ TPS68470_REG_VAUX1CTL, TPS68470_VAUX1CTL_EN_MASK,
+ tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
+ TPS68470_REGULATOR(AUX2, TPS68470_AUX2, tps68470_regulator_ops, 126,
+ TPS68470_REG_VAUX2VAL, TPS68470_VAUX2VAL_AUX2VOLT_MASK,
+ TPS68470_REG_VAUX2CTL, TPS68470_VAUX2CTL_EN_MASK,
+ tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
+};
+
+static int tps68470_regulator_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct tps68470_regulator_platform_data *pdata = dev_get_platdata(dev);
+ struct tps68470_regulator_data *data;
+ struct regulator_config config = { };
+ struct regulator_dev *rdev;
+ int i;
+
+ data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->clk = devm_clk_get(dev, "tps68470-clk");
+ if (IS_ERR(data->clk))
+ return dev_err_probe(dev, PTR_ERR(data->clk), "getting tps68470-clk\n");
+
+ config.dev = dev->parent;
+ config.regmap = dev_get_drvdata(dev->parent);
+ config.driver_data = data;
+
+ for (i = 0; i < TPS68470_NUM_REGULATORS; i++) {
+ if (pdata)
+ config.init_data = pdata->reg_init_data[i];
+ else
+ config.init_data = NULL;
+
+ rdev = devm_regulator_register(dev, ®ulators[i], &config);
+ if (IS_ERR(rdev))
+ return dev_err_probe(dev, PTR_ERR(rdev),
+ "registering %s regulator\n",
+ regulators[i].name);
+ }
+
+ return 0;
+}
+
+static struct platform_driver tps68470_regulator_driver = {
+ .driver = {
+ .name = "tps68470-regulator",
+ },
+ .probe = tps68470_regulator_probe,
+};
+
+/*
+ * The ACPI tps68470 probe-ordering depends on the clk/gpio/regulator drivers
+ * registering before the drivers for the camera-sensors which use them bind.
+ * subsys_initcall() ensures this when the drivers are builtin.
+ */
+static int __init tps68470_regulator_init(void)
+{
+ return platform_driver_register(&tps68470_regulator_driver);
+}
+subsys_initcall(tps68470_regulator_init);
+
+static void __exit tps68470_regulator_exit(void)
+{
+ platform_driver_unregister(&tps68470_regulator_driver);
+}
+module_exit(tps68470_regulator_exit);
+
+MODULE_ALIAS("platform:tps68470-regulator");
+MODULE_DESCRIPTION("TPS68470 voltage regulator driver");
+MODULE_LICENSE("GPL v2");
projects / platform / kernel / linux-starfive.git / commitdiff