regulator: tps65912: Add regulator driver for the TPS65912 PMIC

This patch adds support for TPS65912 PMIC regulators.

The regulators set consists of 4 DCDCs and 10 LDOs. The output
voltages are configurable and are meant to supply power to the
main processor and other components.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

3 files changed, 175 insertions, 0 deletions

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index eb1b4a26cb3e..32f77a1e8305 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -760,6 +760,12 @@ config REGULATOR_TPS65910
         help
           This driver supports TPS65910/TPS65911 voltage regulator chips.
 
+config REGULATOR_TPS65912
+        tristate "TI TPS65912 Power regulator"
+        depends on MFD_TPS65912
+        help
+            This driver supports TPS65912 voltage regulator chip.
+
 config REGULATOR_TPS80031
         tristate "TI TPS80031/TPS80032 power regualtor driver"
         depends on MFD_TPS80031
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 85da3192701c..980b1943fa81 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -95,6 +95,7 @@ obj-$(CONFIG_REGULATOR_TPS65218) += tps65218-regulator.o
 obj-$(CONFIG_REGULATOR_TPS6524X) += tps6524x-regulator.o
 obj-$(CONFIG_REGULATOR_TPS6586X) += tps6586x-regulator.o
 obj-$(CONFIG_REGULATOR_TPS65910) += tps65910-regulator.o
+obj-$(CONFIG_REGULATOR_TPS65912) += tps65912-regulator.o
 obj-$(CONFIG_REGULATOR_TPS80031) += tps80031-regulator.o
 obj-$(CONFIG_REGULATOR_TWL4030) += twl-regulator.o
 obj-$(CONFIG_REGULATOR_VEXPRESS) += vexpress.o
diff --git a/drivers/regulator/tps65912-regulator.c b/drivers/regulator/tps65912-regulator.c
new file mode 100644
index 000000000000..a4921a70da55
--- /dev/null
+++ b/drivers/regulator/tps65912-regulator.c
@@ -0,0 +1,168 @@
+/*
+ * Regulator driver for TI TPS65912x PMICs
+ *
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
+ *      Andrew F. Davis <afd@ti.com>
+ *
+ * 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 TPS65218 driver and the previous TPS65912 driver by
+ * Margarita Olaya Cabrera <magi@slimlogic.co.uk>
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+
+#include <linux/mfd/tps65912.h>
+
+enum tps65912_regulators { DCDC1, DCDC2, DCDC3, DCDC4, LDO1, LDO2, LDO3,
+        LDO4, LDO5, LDO6, LDO7, LDO8, LDO9, LDO10 };
+
+#define TPS65912_REGULATOR(_name, _id, _of_match, _ops, _vr, _er, _lr)  \
+        [_id] = {                                                       \
+                .name                   = _name,                        \
+                .of_match               = _of_match,                    \
+                .regulators_node        = "regulators",                 \
+                .id                     = _id,                          \
+                .ops                    = &_ops,                        \
+                .n_voltages             = 64,                           \
+                .type                   = REGULATOR_VOLTAGE,            \
+                .owner                  = THIS_MODULE,                  \
+                .vsel_reg               = _vr,                          \
+                .vsel_mask              = 0x3f,                         \
+                .enable_reg             = _er,                          \
+                .enable_mask            = BIT(7),                       \
+                .volt_table             = NULL,                         \
+                .linear_ranges          = _lr,                          \
+                .n_linear_ranges        = ARRAY_SIZE(_lr),              \
+        }
+
+static const struct regulator_linear_range tps65912_dcdc_ranges[] = {
+        REGULATOR_LINEAR_RANGE(500000, 0x0, 0x3f, 50000),
+};
+
+static const struct regulator_linear_range tps65912_ldo_ranges[] = {
+        REGULATOR_LINEAR_RANGE(800000, 0x0, 0x20, 25000),
+        REGULATOR_LINEAR_RANGE(1650000, 0x21, 0x3c, 50000),
+        REGULATOR_LINEAR_RANGE(3100000, 0x3d, 0x3f, 100000),
+};
+
+/* Operations permitted on DCDCx */
+static struct regulator_ops tps65912_ops_dcdc = {
+        .is_enabled             = regulator_is_enabled_regmap,
+        .enable                 = regulator_enable_regmap,
+        .disable                = regulator_disable_regmap,
+        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
+        .set_voltage_sel        = regulator_set_voltage_sel_regmap,
+        .list_voltage           = regulator_list_voltage_linear_range,
+};
+
+/* Operations permitted on LDOx */
+static struct regulator_ops tps65912_ops_ldo = {
+        .is_enabled             = regulator_is_enabled_regmap,
+        .enable                 = regulator_enable_regmap,
+        .disable                = regulator_disable_regmap,
+        .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[] = {
+        TPS65912_REGULATOR("DCDC1", DCDC1, "dcdc1", tps65912_ops_dcdc,
+                           TPS65912_DCDC1_OP, TPS65912_DCDC1_CTRL,
+                           tps65912_dcdc_ranges),
+        TPS65912_REGULATOR("DCDC2", DCDC2, "dcdc2", tps65912_ops_dcdc,
+                           TPS65912_DCDC2_OP, TPS65912_DCDC2_CTRL,
+                           tps65912_dcdc_ranges),
+        TPS65912_REGULATOR("DCDC3", DCDC3, "dcdc3", tps65912_ops_dcdc,
+                           TPS65912_DCDC3_OP, TPS65912_DCDC3_CTRL,
+                           tps65912_dcdc_ranges),
+        TPS65912_REGULATOR("DCDC4", DCDC4, "dcdc4", tps65912_ops_dcdc,
+                           TPS65912_DCDC4_OP, TPS65912_DCDC4_CTRL,
+                           tps65912_dcdc_ranges),
+        TPS65912_REGULATOR("LDO1", LDO1, "ldo1", tps65912_ops_ldo,
+                           TPS65912_LDO1_OP, TPS65912_LDO1_AVS,
+                           tps65912_ldo_ranges),
+        TPS65912_REGULATOR("LDO2", LDO2, "ldo2", tps65912_ops_ldo,
+                           TPS65912_LDO2_OP, TPS65912_LDO2_AVS,
+                           tps65912_ldo_ranges),
+        TPS65912_REGULATOR("LDO3", LDO3, "ldo3", tps65912_ops_ldo,
+                           TPS65912_LDO3_OP, TPS65912_LDO3_AVS,
+                           tps65912_ldo_ranges),
+        TPS65912_REGULATOR("LDO4", LDO4, "ldo4", tps65912_ops_ldo,
+                           TPS65912_LDO4_OP, TPS65912_LDO4_AVS,
+                           tps65912_ldo_ranges),
+        TPS65912_REGULATOR("LDO5", LDO5, "ldo5", tps65912_ops_ldo,
+                           TPS65912_LDO5, TPS65912_LDO5,
+                           tps65912_ldo_ranges),
+        TPS65912_REGULATOR("LDO6", LDO6, "ldo6", tps65912_ops_ldo,
+                           TPS65912_LDO6, TPS65912_LDO6,
+                           tps65912_ldo_ranges),
+        TPS65912_REGULATOR("LDO7", LDO7, "ldo7", tps65912_ops_ldo,
+                           TPS65912_LDO7, TPS65912_LDO7,
+                           tps65912_ldo_ranges),
+        TPS65912_REGULATOR("LDO8", LDO8, "ldo8", tps65912_ops_ldo,
+                           TPS65912_LDO8, TPS65912_LDO8,
+                           tps65912_ldo_ranges),
+        TPS65912_REGULATOR("LDO9", LDO9, "ldo9", tps65912_ops_ldo,
+                           TPS65912_LDO9, TPS65912_LDO9,
+                           tps65912_ldo_ranges),
+        TPS65912_REGULATOR("LDO10", LDO10, "ldo10", tps65912_ops_ldo,
+                           TPS65912_LDO10, TPS65912_LDO10,
+                           tps65912_ldo_ranges),
+};
+
+static int tps65912_regulator_probe(struct platform_device *pdev)
+{
+        struct tps65912 *tps = dev_get_drvdata(pdev->dev.parent);
+        struct regulator_config config = { };
+        struct regulator_dev *rdev;
+        int i;
+
+        platform_set_drvdata(pdev, tps);
+
+        config.dev = &pdev->dev;
+        config.driver_data = tps;
+        config.dev->of_node = tps->dev->of_node;
+        config.regmap = tps->regmap;
+
+        for (i = 0; i < ARRAY_SIZE(regulators); i++) {
+                rdev = devm_regulator_register(&pdev->dev, &regulators[i],
+                                               &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 platform_device_id tps65912_regulator_id_table[] = {
+        { "tps65912-regulator", },
+        { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, tps65912_regulator_id_table);
+
+static struct platform_driver tps65912_regulator_driver = {
+        .driver = {
+                .name = "tps65912-regulator",
+        },
+        .probe = tps65912_regulator_probe,
+        .id_table = tps65912_regulator_id_table,
+};
+module_platform_driver(tps65912_regulator_driver);
+
+MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
+MODULE_DESCRIPTION("TPS65912 voltage regulator driver");
+MODULE_LICENSE("GPL v2");