[PATCH 3/4] regulator: tps65086: Add regulator driver for the TPS65086 PMIC

["Andrew F. Davis" <afd@xxxxxx>]

Add support for TPS65086 PMIC regulators.

The regulators set consists of 3 Step-down Controllers, 3 Step-down
Converters, 3 LDOs, 3 Load Switches, and a Sink and Source LDO. The
output voltages are configurable and are meant to supply power to a
SoC and/or other components.

Signed-off-by: Andrew F. Davis <afd@xxxxxx>
---
 drivers/regulator/Kconfig              |   7 +
 drivers/regulator/Makefile             |   1 +
 drivers/regulator/tps65086-regulator.c | 263 +++++++++++++++++++++++++++++++++
 3 files changed, 271 insertions(+)
 create mode 100644 drivers/regulator/tps65086-regulator.c

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 64bccff..cb5f04d 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -680,6 +680,13 @@ config REGULATOR_TPS6507X
 	  three step-down converters and two general-purpose LDO voltage regulators.
 	  It supports TI's software based Class-2 SmartReflex implementation.
 
+config REGULATOR_TPS65086
+	tristate "TI TPS65086 Power regulator"
+	depends on MFD_TPS65086
+	help
+	  This driver provides support for the voltage regulators on the
+	  TI TPS65086 PMIC.
+
 config REGULATOR_TPS65090
 	tristate "TI TPS65090 Power regulator"
 	depends on MFD_TPS65090
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 0f81749..945d8ec 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -85,6 +85,7 @@ obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o
 obj-$(CONFIG_REGULATOR_TPS62360) += tps62360-regulator.o
 obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o
 obj-$(CONFIG_REGULATOR_TPS6507X) += tps6507x-regulator.o
+obj-$(CONFIG_REGULATOR_TPS65086) += tps65086-regulator.o
 obj-$(CONFIG_REGULATOR_TPS65090) += tps65090-regulator.o
 obj-$(CONFIG_REGULATOR_TPS65217) += tps65217-regulator.o
 obj-$(CONFIG_REGULATOR_TPS65218) += tps65218-regulator.o
diff --git a/drivers/regulator/tps65086-regulator.c b/drivers/regulator/tps65086-regulator.c
new file mode 100644
index 0000000..5fd6cf4
--- /dev/null
+++ b/drivers/regulator/tps65086-regulator.c
@@ -0,0 +1,263 @@
+/*
+ * Regulator driver for TPS65086x PMIC
+ *
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Author: Andrew F. Davis <afd@xxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether expressed or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License version 2 for more details.
+ *
+ * Based on the TPS65912 driver
+ */
+
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+
+#include <linux/mfd/tps65086.h>
+
+enum tps65086_regulators { BUCK1, BUCK2, BUCK3, BUCK4, BUCK5, BUCK6, LDOA1,
+	LDOA2, LDOA3, SWA1, SWB1, SWB2, VTT };
+
+#define TPS65086_REGULATOR(_name, _id, _nv, _vr, _vm, _er, _em, _lr, _dr, _dm)\
+	[_id] = {							\
+		.desc = {						\
+			.name			= _name,		\
+			.id			= _id,			\
+			.ops			= &reg_ops,		\
+			.n_voltages		= _nv,			\
+			.type			= REGULATOR_VOLTAGE,	\
+			.owner			= THIS_MODULE,		\
+			.vsel_reg		= _vr,			\
+			.vsel_mask		= _vm,			\
+			.enable_reg		= _er,			\
+			.enable_mask		= _em,			\
+			.volt_table		= NULL,			\
+			.linear_ranges		= _lr,			\
+			.n_linear_ranges	= ARRAY_SIZE(_lr),	\
+		},							\
+		.decay_reg = _dr,					\
+		.decay_mask = _dm,					\
+	}
+
+#define TPS65086_SWITCH(_name, _id, _er, _em)				\
+	[_id] = {							\
+		.desc = {						\
+			.name			= _name,		\
+			.id			= _id,			\
+			.ops			= &switch_ops,		\
+			.type			= REGULATOR_VOLTAGE,	\
+			.owner			= THIS_MODULE,		\
+			.enable_reg		= _er,			\
+			.enable_mask		= _em,			\
+		},							\
+	}
+
+struct tps65086_regulator {
+	struct regulator_desc desc;
+	unsigned int decay_reg;
+	unsigned int decay_mask;
+};
+
+static const struct regulator_linear_range tps65086_buck126_10mv_ranges[] = {
+	REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
+	REGULATOR_LINEAR_RANGE(410000, 0x1, 0x7F, 10000),
+};
+
+static const struct regulator_linear_range tps65086_buck126_25mv_ranges[] = {
+	REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
+	REGULATOR_LINEAR_RANGE(1000000, 0x1, 0x18, 0),
+	REGULATOR_LINEAR_RANGE(1025000, 0x19, 0x7F, 25000),
+};
+
+static const struct regulator_linear_range tps65086_buck345_ranges[] = {
+	REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
+	REGULATOR_LINEAR_RANGE(425000, 0x1, 0x7F, 25000),
+};
+
+static const struct regulator_linear_range tps65086_ldoa1_ranges[] = {
+	REGULATOR_LINEAR_RANGE(1350000, 0x0, 0x0, 0),
+	REGULATOR_LINEAR_RANGE(1500000, 0x1, 0x7, 100000),
+	REGULATOR_LINEAR_RANGE(2300000, 0x8, 0xA, 100000),
+	REGULATOR_LINEAR_RANGE(2700000, 0xB, 0xD, 150000),
+	REGULATOR_LINEAR_RANGE(3300000, 0xE, 0xE, 0),
+};
+
+static const struct regulator_linear_range tps65086_ldoa23_ranges[] = {
+	REGULATOR_LINEAR_RANGE(700000, 0x0, 0xD, 50000),
+	REGULATOR_LINEAR_RANGE(1400000, 0xE, 0xF, 100000),
+};
+
+/* Operations permitted on regulators */
+static struct regulator_ops reg_ops = {
+	.enable			= regulator_enable_regmap,
+	.disable		= regulator_disable_regmap,
+	.is_enabled		= regulator_is_enabled_regmap,
+	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
+	.map_voltage		= regulator_map_voltage_linear_range,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.list_voltage		= regulator_list_voltage_linear_range,
+};
+
+/* Operations permitted on load switches */
+static struct regulator_ops switch_ops = {
+	.enable			= regulator_enable_regmap,
+	.disable		= regulator_disable_regmap,
+	.is_enabled		= regulator_is_enabled_regmap,
+};
+
+static struct tps65086_regulator regulators[] = {
+	TPS65086_REGULATOR("BUCK1", BUCK1, 0x80, TPS65086_BUCK1CTRL,
+			   BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(0),
+			   tps65086_buck126_10mv_ranges, TPS65086_BUCK1CTRL,
+			   BIT(0)),
+	TPS65086_REGULATOR("BUCK2", BUCK2, 0x80, TPS65086_BUCK2CTRL,
+			   BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(1),
+			   tps65086_buck126_10mv_ranges, TPS65086_BUCK2CTRL,
+			   BIT(0)),
+	TPS65086_REGULATOR("BUCK3", BUCK3, 0x80, TPS65086_BUCK3VID,
+			   BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(2),
+			   tps65086_buck345_ranges, TPS65086_BUCK3DECAY,
+			   BIT(0)),
+	TPS65086_REGULATOR("BUCK4", BUCK4, 0x80, TPS65086_BUCK4VID,
+			   BUCK_VID_MASK, TPS65086_BUCK4CTRL, BIT(0),
+			   tps65086_buck345_ranges, TPS65086_BUCK4VID,
+			   BIT(0)),
+	TPS65086_REGULATOR("BUCK5", BUCK5, 0x80, TPS65086_BUCK5VID,
+			   BUCK_VID_MASK, TPS65086_BUCK5CTRL, BIT(0),
+			   tps65086_buck345_ranges, TPS65086_BUCK5CTRL,
+			   BIT(0)),
+	TPS65086_REGULATOR("BUCK6", BUCK6, 0x80, TPS65086_BUCK6VID,
+			   BUCK_VID_MASK, TPS65086_BUCK6CTRL, BIT(0),
+			   tps65086_buck126_10mv_ranges, TPS65086_BUCK6CTRL,
+			   BIT(0)),
+	TPS65086_REGULATOR("LDOA1", LDOA1, 0xF, TPS65086_LDOA1CTRL,
+			   VDOA1_VID_MASK, TPS65086_LDOA1CTRL, BIT(0),
+			   tps65086_ldoa1_ranges, 0, 0),
+	TPS65086_REGULATOR("LDOA2", LDOA2, 0x10, TPS65086_LDOA2VID,
+			   VDOA23_VID_MASK, TPS65086_LDOA2CTRL, BIT(0),
+			   tps65086_ldoa23_ranges, 0, 0),
+	TPS65086_REGULATOR("LDOA3", LDOA3, 0x10, TPS65086_LDOA3VID,
+			   VDOA23_VID_MASK, TPS65086_LDOA3CTRL, BIT(0),
+			   tps65086_ldoa23_ranges, 0, 0),
+	TPS65086_SWITCH("SWA1", SWA1, TPS65086_SWVTT_EN, BIT(5)),
+	TPS65086_SWITCH("SWB1", SWB1, TPS65086_SWVTT_EN, BIT(6)),
+	TPS65086_SWITCH("SWB2", SWB2, TPS65086_SWVTT_EN, BIT(7)),
+	TPS65086_SWITCH("VTT", VTT, TPS65086_SWVTT_EN, BIT(4)),
+};
+
+static struct of_regulator_match tps65086_matches[] = {
+	{ .name = "buck1", .driver_data = &regulators[BUCK1], },
+	{ .name = "buck2", .driver_data = &regulators[BUCK2], },
+	{ .name = "buck3", .driver_data = &regulators[BUCK3], },
+	{ .name = "buck4", .driver_data = &regulators[BUCK4], },
+	{ .name = "buck5", .driver_data = &regulators[BUCK5], },
+	{ .name = "buck6", .driver_data = &regulators[BUCK6], },
+	{ .name = "ldoa1", .driver_data = &regulators[LDOA1], },
+	{ .name = "ldoa2", .driver_data = &regulators[LDOA2], },
+	{ .name = "ldoa3", .driver_data = &regulators[LDOA3], },
+	{ .name = "swa1", .driver_data = &regulators[SWA1], },
+	{ .name = "swb1", .driver_data = &regulators[SWB1], },
+	{ .name = "swb2", .driver_data = &regulators[SWB2], },
+	{ .name = "vtt", .driver_data = &regulators[VTT], },
+};
+
+static inline bool has_25mv_mode(int id)
+{
+	switch (id) {
+	case BUCK1:
+	case BUCK2:
+	case BUCK6:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static int tps65086_regulator_probe(struct platform_device *pdev)
+{
+	struct tps65086 *tps = dev_get_drvdata(pdev->dev.parent);
+	struct regulator_config config = { };
+	struct regulator_dev *rdev;
+	struct tps65086_regulator *regulator;
+
+	int i, ret;
+
+	platform_set_drvdata(pdev, tps);
+
+	config.dev = &pdev->dev;
+	config.driver_data = tps;
+	config.regmap = tps->regmap;
+
+	ret = of_regulator_match(&pdev->dev, pdev->dev.of_node,
+				 tps65086_matches,
+				 ARRAY_SIZE(tps65086_matches));
+	if (ret < 0) {
+		dev_err(tps->dev, "Error parsing regulator init data\n");
+		return ret;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(tps65086_matches); i++) {
+		config.init_data = tps65086_matches[i].init_data;
+		config.of_node = tps65086_matches[i].of_node;
+		regulator = tps65086_matches[i].driver_data;
+
+		/* Check for 25mV step mode */
+		if (has_25mv_mode(regulator->desc.id) &&
+				of_property_read_bool(config.of_node, "ti,regulator-step-size-25mv")) {
+			regulator->desc.linear_ranges = tps65086_buck126_25mv_ranges;
+			regulator->desc.n_linear_ranges = ARRAY_SIZE(tps65086_buck126_25mv_ranges);
+		}
+
+		/* Check for decay mode */
+		if (i <= BUCK6 && of_property_read_bool(config.of_node, "ti,regulator-decay")) {
+			ret = regmap_write_bits(tps->regmap,
+						regulator->decay_reg,
+						regulator->decay_mask,
+						regulator->decay_mask);
+			if (ret < 0) {
+				dev_err(tps->dev, "Error setting decay\n");
+				return ret;
+			}
+		}
+
+		rdev = devm_regulator_register(&pdev->dev, &regulator->desc,
+					       &config);
+		if (IS_ERR(rdev)) {
+			dev_err(tps->dev, "failed to register %s regulator\n",
+				pdev->name);
+			return PTR_ERR(rdev);
+		}
+	}
+
+	return 0;
+}
+
+static const struct of_device_id tps65086_regulator_of_match_table[] = {
+	{ .compatible = "ti,tps65086-regulator", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, tps65086_regulator_of_match_table);
+
+static struct platform_driver tps65086_regulator_driver = {
+	.driver = {
+		.name = "tps65086-pmic",
+		.of_match_table = tps65086_regulator_of_match_table,
+	},
+	.probe = tps65086_regulator_probe,
+};
+
+module_platform_driver(tps65086_regulator_driver);
+
+MODULE_AUTHOR("Andrew F. Davis <afd@xxxxxx>");
+MODULE_DESCRIPTION("TPS65086x voltage regulator driver");
+MODULE_LICENSE("GPL v2");
-- 
1.9.1

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