--- /dev/null
+/*
+ * s2mpb02_regulator.c - Regulator driver for the Samsung s2mpb02
+ *
+ * Copyright (C) 2014 Samsung Electronics
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/bug.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/mfd/s2mpb02.h>
+#include <linux/mfd/s2mpb02-regulator.h>
+#include <linux/regulator/of_regulator.h>
+
+struct s2mpb02_data {
+ struct s2mpb02_dev *iodev;
+ int num_regulators;
+ struct regulator_dev *rdev[S2MPB02_REGULATOR_MAX];
+ int opmode[S2MPB02_REGULATOR_MAX];
+};
+
+static int s2m_enable(struct regulator_dev *rdev)
+{
+ struct s2mpb02_data *info = rdev_get_drvdata(rdev);
+ struct i2c_client *i2c = info->iodev->i2c;
+
+ return s2mpb02_update_reg(i2c, rdev->desc->enable_reg,
+ info->opmode[rdev_get_id(rdev)],
+ rdev->desc->enable_mask);
+}
+
+static int s2m_disable_regmap(struct regulator_dev *rdev)
+{
+ struct s2mpb02_data *info = rdev_get_drvdata(rdev);
+ struct i2c_client *i2c = info->iodev->i2c;
+ u8 val;
+
+ if (rdev->desc->enable_is_inverted)
+ val = rdev->desc->enable_mask;
+ else
+ val = 0;
+
+ return s2mpb02_update_reg(i2c, rdev->desc->enable_reg,
+ val, rdev->desc->enable_mask);
+}
+
+static int s2m_is_enabled_regmap(struct regulator_dev *rdev)
+{
+ struct s2mpb02_data *info = rdev_get_drvdata(rdev);
+ struct i2c_client *i2c = info->iodev->i2c;
+ int ret;
+ u8 val;
+
+ ret = s2mpb02_read_reg(i2c, rdev->desc->enable_reg, &val);
+ if (ret < 0)
+ return ret;
+
+ if (rdev->desc->enable_is_inverted)
+ return (val & rdev->desc->enable_mask) == 0;
+ else
+ return (val & rdev->desc->enable_mask) != 0;
+}
+
+static int s2m_get_voltage_sel_regmap(struct regulator_dev *rdev)
+{
+ struct s2mpb02_data *info = rdev_get_drvdata(rdev);
+ struct i2c_client *i2c = info->iodev->i2c;
+ int ret;
+ u8 val;
+
+ ret = s2mpb02_read_reg(i2c, rdev->desc->vsel_reg, &val);
+ if (ret < 0)
+ return ret;
+
+ val &= rdev->desc->vsel_mask;
+
+ return val;
+}
+
+static int s2m_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel)
+{
+ struct s2mpb02_data *info = rdev_get_drvdata(rdev);
+ struct i2c_client *i2c = info->iodev->i2c;
+ int ret;
+
+ ret = s2mpb02_update_reg(i2c, rdev->desc->vsel_reg,
+ sel, rdev->desc->vsel_mask);
+ if (ret < 0)
+ goto out;
+
+ if (rdev->desc->apply_bit)
+ ret = s2mpb02_update_reg(i2c, rdev->desc->apply_reg,
+ rdev->desc->apply_bit,
+ rdev->desc->apply_bit);
+ return ret;
+out:
+ pr_warn("%s: failed to set voltage_sel_regmap\n", rdev->desc->name);
+ return ret;
+}
+
+static int s2m_set_voltage_sel_regmap_buck(struct regulator_dev *rdev,
+ unsigned sel)
+{
+ struct s2mpb02_data *info = rdev_get_drvdata(rdev);
+ struct i2c_client *i2c = info->iodev->i2c;
+ int ret;
+
+ ret = s2mpb02_write_reg(i2c, rdev->desc->vsel_reg, sel);
+ if (ret < 0)
+ goto out;
+
+ if (rdev->desc->apply_bit)
+ ret = s2mpb02_update_reg(i2c, rdev->desc->apply_reg,
+ rdev->desc->apply_bit,
+ rdev->desc->apply_bit);
+ return ret;
+out:
+ pr_warn("%s: failed to set voltage_sel_regmap\n", rdev->desc->name);
+ return ret;
+}
+
+static int s2m_set_voltage_time_sel(struct regulator_dev *rdev,
+ unsigned int old_selector,
+ unsigned int new_selector)
+{
+ int old_volt, new_volt;
+
+ /* sanity check */
+ if (!rdev->desc->ops->list_voltage)
+ return -EINVAL;
+
+ old_volt = rdev->desc->ops->list_voltage(rdev, old_selector);
+ new_volt = rdev->desc->ops->list_voltage(rdev, new_selector);
+
+ if (old_selector < new_selector)
+ return DIV_ROUND_UP(new_volt - old_volt, S2MPB02_RAMP_DELAY);
+
+ return 0;
+}
+
+static struct regulator_ops s2mpb02_ldo_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .is_enabled = s2m_is_enabled_regmap,
+ .enable = s2m_enable,
+ .disable = s2m_disable_regmap,
+ .get_voltage_sel = s2m_get_voltage_sel_regmap,
+ .set_voltage_sel = s2m_set_voltage_sel_regmap,
+ .set_voltage_time_sel = s2m_set_voltage_time_sel,
+};
+
+static struct regulator_ops s2mpb02_buck_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .is_enabled = s2m_is_enabled_regmap,
+ .enable = s2m_enable,
+ .disable = s2m_disable_regmap,
+ .get_voltage_sel = s2m_get_voltage_sel_regmap,
+ .set_voltage_sel = s2m_set_voltage_sel_regmap_buck,
+ .set_voltage_time_sel = s2m_set_voltage_time_sel,
+};
+
+#define _BUCK(macro) S2MPB02_BUCK##macro
+#define _buck_ops(num) s2mpb02_buck_ops##num
+
+#define _LDO(macro) S2MPB02_LDO##macro
+#define _REG(ctrl) S2MPB02_REG##ctrl
+#define _ldo_ops(num) s2mpb02_ldo_ops##num
+#define _TIME(macro) S2MPB02_ENABLE_TIME##macro
+
+#define BUCK_DESC(_name, _id, _ops, m, s, v, e, t) { \
+ .name = _name, \
+ .id = _id, \
+ .ops = _ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = m, \
+ .uV_step = s, \
+ .n_voltages = S2MPB02_BUCK_N_VOLTAGES, \
+ .vsel_reg = v, \
+ .vsel_mask = S2MPB02_BUCK_VSEL_MASK, \
+ .enable_reg = e, \
+ .enable_mask = S2MPB02_BUCK_ENABLE_MASK, \
+ .enable_time = t \
+}
+
+#define LDO_DESC(_name, _id, _ops, m, s, v, e, t) { \
+ .name = _name, \
+ .id = _id, \
+ .ops = _ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = m, \
+ .uV_step = s, \
+ .n_voltages = S2MPB02_LDO_N_VOLTAGES, \
+ .vsel_reg = v, \
+ .vsel_mask = S2MPB02_LDO_VSEL_MASK, \
+ .enable_reg = e, \
+ .enable_mask = S2MPB02_LDO_ENABLE_MASK, \
+ .enable_time = t \
+}
+
+static struct regulator_desc regulators[S2MPB02_REGULATOR_MAX] = {
+ /* name, id, ops, min_uv, uV_step, vsel_reg, enable_reg */
+ LDO_DESC("s2mpb02-ldo1", _LDO(1), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP1), _REG(_L1CTRL),
+ _REG(_L1CTRL), _TIME(_LDO)),
+ LDO_DESC("s2mpb02-ldo2", _LDO(2), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP1), _REG(_L2CTRL),
+ _REG(_L2CTRL), _TIME(_LDO)),
+ LDO_DESC("s2mpb02-ldo3", _LDO(3), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP1), _REG(_L3CTRL),
+ _REG(_L3CTRL), _TIME(_LDO)),
+ LDO_DESC("s2mpb02-ldo4", _LDO(4), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP1), _REG(_L4CTRL),
+ _REG(_L4CTRL), _TIME(_LDO)),
+ LDO_DESC("s2mpb02-ldo5", _LDO(5), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP1), _REG(_L5CTRL),
+ _REG(_L5CTRL), _TIME(_LDO)),
+ LDO_DESC("s2mpb02-ldo6", _LDO(6), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP2), _REG(_L6CTRL),
+ _REG(_L6CTRL), _TIME(_LDO)),
+ LDO_DESC("s2mpb02-ldo7", _LDO(7), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP2), _REG(_L7CTRL),
+ _REG(_L7CTRL), _TIME(_LDO)),
+ LDO_DESC("s2mpb02-ldo8", _LDO(8), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP2), _REG(_L8CTRL),
+ _REG(_L8CTRL), _TIME(_LDO)),
+ LDO_DESC("s2mpb02-ldo9", _LDO(9), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP2), _REG(_L9CTRL),
+ _REG(_L9CTRL), _TIME(_LDO)),
+ LDO_DESC("s2mpb02-ldo10", _LDO(10), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP2), _REG(_L10CTRL),
+ _REG(_L10CTRL), _TIME(_LDO)),
+ LDO_DESC("s2mpb02-ldo11", _LDO(11), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP2), _REG(_L11CTRL),
+ _REG(_L11CTRL), _TIME(_LDO)),
+ LDO_DESC("s2mpb02-ldo12", _LDO(12), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP2), _REG(_L12CTRL),
+ _REG(_L12CTRL), _TIME(_LDO)),
+ LDO_DESC("s2mpb02-ldo13", _LDO(13), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP2), _REG(_L13CTRL),
+ _REG(_L13CTRL), _TIME(_LDO)),
+ LDO_DESC("s2mpb02-ldo14", _LDO(14), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP2), _REG(_L14CTRL),
+ _REG(_L14CTRL), _TIME(_LDO)),
+ LDO_DESC("s2mpb02-ldo15", _LDO(15), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP2), _REG(_L15CTRL),
+ _REG(_L15CTRL), _TIME(_LDO)),
+ LDO_DESC("s2mpb02-ldo16", _LDO(16), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP2), _REG(_L16CTRL),
+ _REG(_L16CTRL), _TIME(_LDO)),
+ LDO_DESC("s2mpb02-ldo17", _LDO(17), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP2), _REG(_L17CTRL),
+ _REG(_L17CTRL), _TIME(_LDO)),
+ LDO_DESC("s2mpb02-ldo18", _LDO(18), &_ldo_ops(), _LDO(_MIN1),
+ _LDO(_STEP2), _REG(_L18CTRL),
+ _REG(_L18CTRL), _TIME(_LDO)),
+ BUCK_DESC("s2mpb02-buck1", _BUCK(1), &_buck_ops(), _BUCK(_MIN1),
+ _BUCK(_STEP1), _REG(_B1CTRL2),
+ _REG(_B1CTRL1), _TIME(_BUCK)),
+ BUCK_DESC("s2mpb02-buck2", _BUCK(2), &_buck_ops(), _BUCK(_MIN1),
+ _BUCK(_STEP1), _REG(_B2CTRL2),
+ _REG(_B2CTRL1), _TIME(_BUCK)),
+ BUCK_DESC("s2mpb02-bb", S2MPB02_BB1, &_buck_ops(), _BUCK(_MIN2),
+ _BUCK(_STEP2), _REG(_BB1CTRL2),
+ _REG(_BB1CTRL1), _TIME(_BB)),
+};
+
+#ifdef CONFIG_OF
+static int s2mpb02_pmic_dt_parse_pdata(struct s2mpb02_dev *iodev,
+ struct s2mpb02_platform_data *pdata)
+{
+ struct device_node *pmic_np, *regulators_np, *reg_np;
+ struct s2mpb02_regulator_data *rdata;
+ unsigned int i;
+
+ pmic_np = iodev->dev->of_node;
+ if (!pmic_np) {
+ dev_err(iodev->dev, "could not find pmic sub-node\n");
+ return -ENODEV;
+ }
+
+ regulators_np = of_find_node_by_name(pmic_np, "regulators");
+ if (!regulators_np) {
+ dev_err(iodev->dev, "could not find regulators sub-node\n");
+ return -EINVAL;
+ }
+
+ /* count the number of regulators to be supported in pmic */
+ pdata->num_regulators = 0;
+ for_each_child_of_node(regulators_np, reg_np) {
+ pdata->num_regulators++;
+ }
+
+ rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) *
+ pdata->num_regulators, GFP_KERNEL);
+ if (!rdata) {
+ dev_err(iodev->dev,
+ "could not allocate memory for regulator data\n");
+ return -ENOMEM;
+ }
+
+ pdata->regulators = rdata;
+ for_each_child_of_node(regulators_np, reg_np) {
+ for (i = 0; i < ARRAY_SIZE(regulators); i++)
+ if (!of_node_cmp(reg_np->name,
+ regulators[i].name))
+ break;
+
+ if (i == ARRAY_SIZE(regulators)) {
+ dev_warn(iodev->dev,
+ "don't know how to configure regulator %s\n",
+ reg_np->name);
+ continue;
+ }
+
+ rdata->id = i;
+ rdata->initdata = of_get_regulator_init_data(
+ iodev->dev, reg_np,
+ ®ulators[i]);
+ rdata->reg_node = reg_np;
+ rdata++;
+ }
+ of_node_put(regulators_np);
+
+ return 0;
+}
+#else
+static int s2mpb02_pmic_dt_parse_pdata(struct s2mpb02_dev *iodev,
+ struct s2mpb02_platform_data *pdata)
+{
+ return 0;
+}
+#endif /* CONFIG_OF */
+
+static int s2mpb02_pmic_probe(struct platform_device *pdev)
+{
+ struct s2mpb02_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+ struct s2mpb02_platform_data *pdata = iodev->pdata;
+ struct regulator_config config = { };
+ struct s2mpb02_data *s2mpb02;
+ struct i2c_client *i2c;
+ int i, ret;
+
+ dev_info(&pdev->dev, "%s\n", __func__);
+ if (!pdata) {
+ pr_info("[%s:%d] !pdata\n", __FILE__, __LINE__);
+ dev_err(pdev->dev.parent, "No platform init data supplied.\n");
+ return -ENODEV;
+ }
+
+ if (iodev->dev->of_node) {
+ ret = s2mpb02_pmic_dt_parse_pdata(iodev, pdata);
+ if (ret)
+ return ret;
+ }
+
+ s2mpb02 = devm_kzalloc(&pdev->dev, sizeof(struct s2mpb02_data),
+ GFP_KERNEL);
+ if (!s2mpb02) {
+ pr_info("[%s:%d] if (!s2mpb02)\n", __FILE__, __LINE__);
+ return -ENOMEM;
+ }
+
+ s2mpb02->iodev = iodev;
+ s2mpb02->num_regulators = pdata->num_regulators;
+ platform_set_drvdata(pdev, s2mpb02);
+ i2c = s2mpb02->iodev->i2c;
+
+ for (i = 0; i < pdata->num_regulators; i++) {
+ int id = pdata->regulators[i].id;
+ config.dev = &pdev->dev;
+ config.init_data = pdata->regulators[i].initdata;
+ config.driver_data = s2mpb02;
+ config.of_node = pdata->regulators[i].reg_node;
+ s2mpb02->opmode[id] = regulators[id].enable_mask;
+ s2mpb02->rdev[i] = regulator_register(®ulators[id], &config);
+ if (IS_ERR(s2mpb02->rdev[i])) {
+ ret = PTR_ERR(s2mpb02->rdev[i]);
+ dev_err(&pdev->dev, "regulator init failed for %d\n",
+ id);
+ s2mpb02->rdev[i] = NULL;
+ goto err;
+ }
+ }
+
+ dev_info(&pdev->dev, "%s ended\n", __func__);
+ return 0;
+ err:
+ pr_info("[%s:%d] err:\n", __FILE__, __LINE__);
+ for (i = 0; i < s2mpb02->num_regulators; i++)
+ if (s2mpb02->rdev[i])
+ regulator_unregister(s2mpb02->rdev[i]);
+
+ devm_kfree(&pdev->dev, (void*)s2mpb02);
+
+ return ret;
+}
+
+static int s2mpb02_pmic_remove(struct platform_device *pdev)
+{
+ struct s2mpb02_data *s2mpb02 = platform_get_drvdata(pdev);
+ int i;
+ dev_info(&pdev->dev, "%s\n", __func__);
+ for (i = 0; i < s2mpb02->num_regulators; i++)
+ if (s2mpb02->rdev[i])
+ regulator_unregister(s2mpb02->rdev[i]);
+
+ return 0;
+}
+
+static const struct platform_device_id s2mpb02_pmic_id[] = {
+ {"s2mpb02-regulator", 0},
+ {},
+};
+MODULE_DEVICE_TABLE(platform, s2mpb02_pmic_id);
+
+static struct platform_driver s2mpb02_pmic_driver = {
+ .driver = {
+ .name = "s2mpb02-regulator",
+ .owner = THIS_MODULE,
+ .suppress_bind_attrs = true,
+ },
+ .probe = s2mpb02_pmic_probe,
+ .remove = s2mpb02_pmic_remove,
+ .id_table = s2mpb02_pmic_id,
+};
+
+static int __init s2mpb02_pmic_init(void)
+{
+ return platform_driver_register(&s2mpb02_pmic_driver);
+}
+subsys_initcall(s2mpb02_pmic_init);
+
+static void __exit s2mpb02_pmic_cleanup(void)
+{
+ platform_driver_unregister(&s2mpb02_pmic_driver);
+}
+
+module_exit(s2mpb02_pmic_cleanup);
+
+MODULE_DESCRIPTION("SAMSUNG s2mpb02 Regulator Driver");
+MODULE_LICENSE("GPL");
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff