@@ -1167,5 +1167,15 @@ config REGULATOR_WM8994
This driver provides support for the voltage regulators on the
WM8994 CODEC.
+config REGULATOR_QCOM_LABIBB
+ tristate "QCOM LAB/IBB regulator support"
+ depends on SPMI || COMPILE_TEST
+ help
+ This driver supports Qualcomm's LAB/IBB regulators present on the
+ Qualcomm's PMIC chip pmi8998. QCOM LAB and IBB are SPMI
+ based PMIC implementations. LAB can be used as positive
+ boost regulator and IBB can be used as a negative boost regulator
+ for LCD display panel.
+
endif
@@ -87,6 +87,7 @@ obj-$(CONFIG_REGULATOR_MT6323) += mt6323-regulator.o
obj-$(CONFIG_REGULATOR_MT6358) += mt6358-regulator.o
obj-$(CONFIG_REGULATOR_MT6380) += mt6380-regulator.o
obj-$(CONFIG_REGULATOR_MT6397) += mt6397-regulator.o
+obj-$(CONFIG_REGULATOR_QCOM_LABIBB) += qcom-labibb-regulator.o
obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-regulator.o
obj-$(CONFIG_REGULATOR_QCOM_RPMH) += qcom-rpmh-regulator.o
obj-$(CONFIG_REGULATOR_QCOM_SMD_RPM) += qcom_smd-regulator.o
new file mode 100644
@@ -0,0 +1,225 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright (c) 2020, The Linux Foundation. All rights reserved.
+
+#include <linux/module.h>
+#include <linux/of_irq.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+
+#define REG_PERPH_TYPE 0x04
+#define QCOM_LAB_TYPE 0x24
+#define QCOM_IBB_TYPE 0x20
+
+#define REG_LABIBB_STATUS1 0x08
+#define REG_LABIBB_ENABLE_CTL 0x46
+#define LABIBB_STATUS1_VREG_OK_BIT BIT(7)
+#define LABIBB_CONTROL_ENABLE BIT(7)
+
+#define LAB_ENABLE_CTL_MASK BIT(7)
+#define IBB_ENABLE_CTL_MASK (BIT(7) | BIT(6))
+
+#define LABIBB_ENABLE_TIME 1000
+#define LAB_POLL_ENABLED_TIME (LABIBB_ENABLE_TIME * 2)
+#define IBB_POLL_ENABLED_TIME (LABIBB_ENABLE_TIME * 10)
+#define LABIBB_OFF_ON_DELAY (8200)
+
+struct labibb_regulator {
+ struct regulator_desc desc;
+ struct device *dev;
+ struct regmap *regmap;
+ struct regulator_dev *rdev;
+ u16 base;
+ u8 type;
+};
+
+struct labibb_regulator_data {
+ u16 base;
+ const char *name;
+ u8 type;
+ unsigned int poll_enabled_time;
+};
+
+static int qcom_labibb_regulator_is_enabled(struct regulator_dev *rdev)
+{
+ int ret;
+ unsigned int val;
+ struct labibb_regulator *reg = rdev_get_drvdata(rdev);
+
+ ret = regmap_read(reg->regmap, reg->base + REG_LABIBB_STATUS1, &val);
+ if (ret < 0) {
+ dev_err(reg->dev, "Read register failed ret = %d\n", ret);
+ return ret;
+ }
+ return !!(val & LABIBB_STATUS1_VREG_OK_BIT);
+}
+
+static int qcom_labibb_regulator_enable(struct regulator_dev *rdev)
+{
+ int ret;
+ struct labibb_regulator *reg = rdev_get_drvdata(rdev);
+
+ ret = regulator_enable_regmap(rdev);
+ if (ret < 0)
+ dev_err(reg->dev, "Write failed: enable %s regulator\n",
+ reg->desc.name);
+
+ return ret;
+}
+
+static int qcom_labibb_regulator_disable(struct regulator_dev *rdev)
+{
+ int ret = 0;
+ struct labibb_regulator *reg = rdev_get_drvdata(rdev);
+
+ ret = regulator_disable_regmap(rdev);
+ if (ret < 0)
+ dev_err(reg->dev, "Disable failed: disable %s\n",
+ reg->desc.name);
+
+ return ret;
+}
+
+static struct regulator_ops qcom_labibb_ops = {
+ .enable = qcom_labibb_regulator_enable,
+ .disable = qcom_labibb_regulator_disable,
+ .is_enabled = qcom_labibb_regulator_is_enabled,
+};
+
+static int register_labibb_regulator(struct labibb_regulator *reg,
+ const struct labibb_regulator_data *reg_data,
+ struct device_node *of_node)
+{
+ struct regulator_config cfg = {};
+
+ reg->base = reg_data->base;
+ reg->type = reg_data->type;
+ reg->desc.enable_reg = reg->base + REG_LABIBB_ENABLE_CTL;
+ reg->desc.enable_val = LABIBB_CONTROL_ENABLE;
+ reg->desc.of_match = reg_data->name;
+ reg->desc.name = reg_data->name;
+ reg->desc.owner = THIS_MODULE;
+ reg->desc.type = REGULATOR_VOLTAGE;
+ reg->desc.ops = &qcom_labibb_ops;
+
+ reg->desc.enable_time = LABIBB_ENABLE_TIME;
+ reg->desc.poll_enabled_time = reg_data->poll_enabled_time;
+ reg->desc.off_on_delay = LABIBB_OFF_ON_DELAY;
+
+ cfg.dev = reg->dev;
+ cfg.driver_data = reg;
+ cfg.regmap = reg->regmap;
+ cfg.of_node = of_node;
+
+ reg->rdev = devm_regulator_register(reg->dev, ®->desc, &cfg);
+ return PTR_ERR_OR_ZERO(reg->rdev);
+}
+
+static const struct labibb_regulator_data pmi8998_labibb_data[] = {
+ {0xde00, "lab", QCOM_LAB_TYPE, LAB_POLL_ENABLED_TIME},
+ {0xdc00, "ibb", QCOM_IBB_TYPE, IBB_POLL_ENABLED_TIME},
+ { },
+};
+
+static const struct of_device_id qcom_labibb_match[] = {
+ { .compatible = "qcom,pmi8998-lab-ibb", .data = &pmi8998_labibb_data},
+ { },
+};
+MODULE_DEVICE_TABLE(of, qcom_labibb_match);
+
+static int qcom_labibb_regulator_probe(struct platform_device *pdev)
+{
+ struct labibb_regulator *labibb_reg;
+ struct device *dev;
+ struct device_node *child;
+ const struct of_device_id *match;
+ const struct labibb_regulator_data *reg_data;
+ struct regmap *reg_regmap;
+ unsigned int type;
+ int ret;
+
+ reg_regmap = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!reg_regmap) {
+ dev_err(&pdev->dev, "Couldn't get parent's regmap\n");
+ return -ENODEV;
+ }
+
+ dev = &pdev->dev;
+
+ match = of_match_device(qcom_labibb_match, &pdev->dev);
+ if (!match)
+ return -ENODEV;
+
+ for (reg_data = match->data; reg_data->name; reg_data++) {
+ child = of_get_child_by_name(pdev->dev.of_node, reg_data->name);
+
+ /* TODO: This validates if the type of regulator is indeed
+ * what's mentioned in DT.
+ * I'm not sure if this is needed, but we'll keep it for now.
+ */
+ ret = regmap_read(reg_regmap, reg_data->base + REG_PERPH_TYPE,
+ &type);
+ if (ret < 0) {
+ dev_err(dev,
+ "Peripheral type read failed ret=%d\n",
+ ret);
+ return -EINVAL;
+ }
+
+ if ((type != QCOM_LAB_TYPE) && (type != QCOM_IBB_TYPE)) {
+ dev_err(dev,
+ "qcom_labibb: unknown peripheral type\n");
+ return -EINVAL;
+ } else if (type != reg_data->type) {
+ dev_err(dev,
+ "qcom_labibb: type %x doesn't match DT %x\n",
+ type, reg_data->type);
+ return -EINVAL;
+ }
+
+ labibb_reg = devm_kzalloc(&pdev->dev, sizeof(*labibb_reg),
+ GFP_KERNEL);
+ if (!labibb_reg)
+ return -ENOMEM;
+
+ labibb_reg->regmap = reg_regmap;
+ labibb_reg->dev = dev;
+
+ switch (reg_data->type) {
+ case QCOM_LAB_TYPE:
+ labibb_reg->desc.enable_mask = LAB_ENABLE_CTL_MASK;
+ break;
+
+ case QCOM_IBB_TYPE:
+ labibb_reg->desc.enable_mask = IBB_ENABLE_CTL_MASK;
+ break;
+ }
+
+ dev_info(dev, "Registering %s regulator\n", child->full_name);
+
+ ret = register_labibb_regulator(labibb_reg, reg_data, child);
+ if (ret < 0) {
+ dev_err(dev,
+ "qcom_labibb: error registering %s : %d\n",
+ child->full_name, ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static struct platform_driver qcom_labibb_regulator_driver = {
+ .driver = {
+ .name = "qcom-lab-ibb-regulator",
+ .of_match_table = qcom_labibb_match,
+ },
+ .probe = qcom_labibb_regulator_probe,
+};
+module_platform_driver(qcom_labibb_regulator_driver);
+
+MODULE_DESCRIPTION("Qualcomm labibb driver");
+MODULE_LICENSE("GPL v2");