regulator: tps65217: Add tps65217 regulator driver

This patch adds tps65217 PMIC as a regulator

The regulator module consists of 3 DCDCs and 4 LDOs. The output
voltages are configurable and are meant to supply power to the
main processor and other components

Signed-off-by: AnilKumar Ch <anilkumar@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

3 files changed, 503 insertions, 0 deletions

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 4792d661f0bf..376824b865a4 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -275,6 +275,15 @@ 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_TPS65217
+        tristate "TI TPS65217 Power regulators"
+        depends on MFD_TPS65217
+        help
+          This driver supports TPS65217 voltage regulator chips. TPS65217
+          provides three step-down converters and four general-purpose LDO
+          voltage regulators. It supports software based voltage control
+          for different voltage domains
+
 config REGULATOR_TPS65912
         tristate "TI TPS65912 Power regulator"
         depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI)
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 66be54a3e680..4cbf8c55f8a9 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -40,6 +40,7 @@ obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o
 obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o
 obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o
 obj-$(CONFIG_REGULATOR_TPS6507X) += tps6507x-regulator.o
+obj-$(CONFIG_REGULATOR_TPS65217) += tps65217-regulator.o
 obj-$(CONFIG_REGULATOR_TPS6524X) += tps6524x-regulator.o
 obj-$(CONFIG_REGULATOR_TPS65912) += tps65912-regulator.o
 obj-$(CONFIG_REGULATOR_88PM8607) += 88pm8607.o
diff --git a/drivers/regulator/tps65217-regulator.c b/drivers/regulator/tps65217-regulator.c
new file mode 100644
index 000000000000..66655668f965
--- /dev/null
+++ b/drivers/regulator/tps65217-regulator.c
@@ -0,0 +1,493 @@
+/*
+ * tps65217-regulator.c
+ *
+ * Regulator driver for TPS65217 PMIC
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * 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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/mfd/tps65217.h>
+
+#define TPS65217_REGULATOR(_name, _id, _ops, _n)        \
+        {                                               \
+                .name           = _name,                \
+                .id             = _id,                  \
+                .ops            = &_ops,                \
+                .n_voltages     = _n,                   \
+                .type           = REGULATOR_VOLTAGE,    \
+                .owner          = THIS_MODULE,          \
+        }                                               \
+
+#define TPS65217_INFO(_nm, _min, _max, _f1, _f2, _t, _n, _em, _vr, _vm) \
+        {                                               \
+                .name           = _nm,                  \
+                .min_uV         = _min,                 \
+                .max_uV         = _max,                 \
+                .vsel_to_uv     = _f1,                  \
+                .uv_to_vsel     = _f2,                  \
+                .table          = _t,                   \
+                .table_len      = _n,                   \
+                .enable_mask    = _em,                  \
+                .set_vout_reg   = _vr,                  \
+                .set_vout_mask  = _vm,                  \
+        }
+
+static const int LDO1_VSEL_table[] = {
+        1000000, 1100000, 1200000, 1250000,
+        1300000, 1350000, 1400000, 1500000,
+        1600000, 1800000, 2500000, 2750000,
+        2800000, 3000000, 3100000, 3300000,
+};
+
+static int tps65217_vsel_to_uv1(unsigned int vsel)
+{
+        int uV = 0;
+
+        if (vsel > 63)
+                return -EINVAL;
+
+        if (vsel <= 24)
+                uV = vsel * 25000 + 900000;
+        else if (vsel <= 52)
+                uV = (vsel - 24) * 50000 + 1500000;
+        else if (vsel < 56)
+                uV = (vsel - 52) * 100000 + 2900000;
+        else
+                uV = 3300000;
+
+        return uV;
+}
+
+static int tps65217_uv_to_vsel1(int uV, unsigned int *vsel)
+{
+        if ((uV < 0) && (uV > 3300000))
+                return -EINVAL;
+
+        if (uV <= 1500000)
+                *vsel = (uV - 875001) / 25000;
+        else if (uV <= 2900000)
+                *vsel = 24 + (uV - 1450001) / 50000;
+        else if (uV < 3300000)
+                *vsel = 52 + (uV - 2800001) / 100000;
+        else
+                *vsel = 56;
+
+        return 0;
+}
+
+static int tps65217_vsel_to_uv2(unsigned int vsel)
+{
+        int uV = 0;
+
+        if (vsel > 31)
+                return -EINVAL;
+
+        if (vsel <= 8)
+                uV = vsel * 50000 + 1500000;
+        else if (vsel <= 13)
+                uV = (vsel - 8) * 100000 + 1900000;
+        else
+                uV = (vsel - 13) * 50000 + 2400000;
+
+        return uV;
+}
+
+static int tps65217_uv_to_vsel2(int uV, unsigned int *vsel)
+{
+        if ((uV < 0) && (uV > 3300000))
+                return -EINVAL;
+
+        if (uV <= 1900000)
+                *vsel = (uV - 1450001) / 50000;
+        else if (uV <= 2400000)
+                *vsel = 8 + (uV - 1800001) / 100000;
+        else
+                *vsel = 13 + (uV - 2350001) / 50000;
+
+        return 0;
+}
+
+static struct tps_info tps65217_pmic_regs[] = {
+        TPS65217_INFO("DCDC1", 900000, 1800000, tps65217_vsel_to_uv1,
+                        tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC1_EN,
+                        TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK),
+        TPS65217_INFO("DCDC2", 900000, 3300000, tps65217_vsel_to_uv1,
+                        tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC2_EN,
+                        TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK),
+        TPS65217_INFO("DCDC3", 900000, 1500000, tps65217_vsel_to_uv1,
+                        tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC3_EN,
+                        TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK),
+        TPS65217_INFO("LDO1", 1000000, 3300000, NULL, NULL, LDO1_VSEL_table,
+                        16, TPS65217_ENABLE_LDO1_EN, TPS65217_REG_DEFLDO1,
+                        TPS65217_DEFLDO1_LDO1_MASK),
+        TPS65217_INFO("LDO2", 900000, 3300000, tps65217_vsel_to_uv1,
+                        tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_LDO2_EN,
+                        TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK),
+        TPS65217_INFO("LDO3", 1800000, 3300000, tps65217_vsel_to_uv2,
+                        tps65217_uv_to_vsel2, NULL, 32,
+                        TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
+                        TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK),
+        TPS65217_INFO("LDO4", 1800000, 3300000, tps65217_vsel_to_uv2,
+                        tps65217_uv_to_vsel2, NULL, 32,
+                        TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
+                        TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK),
+};
+
+static int tps65217_pmic_dcdc_is_enabled(struct regulator_dev *dev)
+{
+        int ret;
+        struct tps65217 *tps = rdev_get_drvdata(dev);
+        unsigned int data, dcdc = rdev_get_id(dev);
+
+        if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3)
+                return -EINVAL;
+
+        ret = tps65217_reg_read(tps, TPS65217_REG_ENABLE, &data);
+        if (ret)
+                return ret;
+
+        return (data & tps->info[dcdc]->enable_mask) ? 1 : 0;
+}
+
+static int tps65217_pmic_ldo_is_enabled(struct regulator_dev *dev)
+{
+        int ret;
+        struct tps65217 *tps = rdev_get_drvdata(dev);
+        unsigned int data, ldo = rdev_get_id(dev);
+
+        if (ldo < TPS65217_LDO_1 || ldo > TPS65217_LDO_4)
+                return -EINVAL;
+
+        ret = tps65217_reg_read(tps, TPS65217_REG_ENABLE, &data);
+        if (ret)
+                return ret;
+
+        return (data & tps->info[ldo]->enable_mask) ? 1 : 0;
+}
+
+static int tps65217_pmic_dcdc_enable(struct regulator_dev *dev)
+{
+        struct tps65217 *tps = rdev_get_drvdata(dev);
+        unsigned int dcdc = rdev_get_id(dev);
+
+        if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3)
+                return -EINVAL;
+
+        /* Enable the regulator and password protection is level 1 */
+        return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
+                                tps->info[dcdc]->enable_mask,
+                                tps->info[dcdc]->enable_mask,
+                                TPS65217_PROTECT_L1);
+}
+
+static int tps65217_pmic_dcdc_disable(struct regulator_dev *dev)
+{
+        struct tps65217 *tps = rdev_get_drvdata(dev);
+        unsigned int dcdc = rdev_get_id(dev);
+
+        if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3)
+                return -EINVAL;
+
+        /* Disable the regulator and password protection is level 1 */
+        return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
+                        tps->info[dcdc]->enable_mask, TPS65217_PROTECT_L1);
+}
+
+static int tps65217_pmic_ldo_enable(struct regulator_dev *dev)
+{
+        struct tps65217 *tps = rdev_get_drvdata(dev);
+        unsigned int ldo = rdev_get_id(dev);
+
+        if (ldo < TPS65217_LDO_1 || ldo > TPS65217_LDO_4)
+                return -EINVAL;
+
+        /* Enable the regulator and password protection is level 1 */
+        return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
+                                tps->info[ldo]->enable_mask,
+                                tps->info[ldo]->enable_mask,
+                                TPS65217_PROTECT_L1);
+}
+
+static int tps65217_pmic_ldo_disable(struct regulator_dev *dev)
+{
+        struct tps65217 *tps = rdev_get_drvdata(dev);
+        unsigned int ldo = rdev_get_id(dev);
+
+        if (ldo < TPS65217_LDO_1 || ldo > TPS65217_LDO_4)
+                return -EINVAL;
+
+        /* Disable the regulator and password protection is level 1 */
+        return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
+                        tps->info[ldo]->enable_mask, TPS65217_PROTECT_L1);
+}
+
+static int tps65217_pmic_dcdc_get_voltage_sel(struct regulator_dev *dev)
+{
+        int ret;
+        struct tps65217 *tps = rdev_get_drvdata(dev);
+        unsigned int selector, dcdc = rdev_get_id(dev);
+
+        if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3)
+                return -EINVAL;
+
+        ret = tps65217_reg_read(tps, tps->info[dcdc]->set_vout_reg, &selector);
+        if (ret)
+                return ret;
+
+        selector &= tps->info[dcdc]->set_vout_mask;
+
+        return selector;
+}
+
+static int tps65217_pmic_dcdc_set_voltage(struct regulator_dev *dev,
+                                  int min_uV, int max_uV, unsigned *selector)
+{
+        int ret;
+        struct tps65217 *tps = rdev_get_drvdata(dev);
+        unsigned int dcdc = rdev_get_id(dev);
+
+        if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3)
+                return -EINVAL;
+
+        if (min_uV < tps->info[dcdc]->min_uV
+                || min_uV > tps->info[dcdc]->max_uV)
+                return -EINVAL;
+
+        if (max_uV < tps->info[dcdc]->min_uV
+                || max_uV > tps->info[dcdc]->max_uV)
+                return -EINVAL;
+
+        ret = tps->info[dcdc]->uv_to_vsel(min_uV, selector);
+        if (ret)
+                return ret;
+
+        /* Set the voltage based on vsel value and write protect level is 2 */
+        ret = tps65217_set_bits(tps, tps->info[dcdc]->set_vout_reg,
+                                        tps->info[dcdc]->set_vout_mask,
+                                        *selector, TPS65217_PROTECT_L2);
+        if (ret)
+                return ret;
+
+        /* Set GO bit to initiate voltage transistion */
+        return tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
+                                TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
+                                TPS65217_PROTECT_L2);
+}
+
+static int tps65217_pmic_ldo_get_voltage_sel(struct regulator_dev *dev)
+{
+        int ret;
+        struct tps65217 *tps = rdev_get_drvdata(dev);
+        unsigned int selector, ldo = rdev_get_id(dev);
+
+        if (ldo < TPS65217_LDO_1 || ldo > TPS65217_LDO_4)
+                return -EINVAL;
+
+        ret = tps65217_reg_read(tps, tps->info[ldo]->set_vout_reg, &selector);
+        if (ret)
+                return ret;
+
+        selector &= tps->info[ldo]->set_vout_mask;
+
+        return selector;
+}
+
+static int tps65217_pmic_ldo_set_voltage_sel(struct regulator_dev *dev,
+                                                unsigned selector)
+{
+        struct tps65217 *tps = rdev_get_drvdata(dev);
+        int ldo = rdev_get_id(dev);
+
+        if (ldo != TPS65217_LDO_1)
+                return -EINVAL;
+
+        if (selector >= tps->info[ldo]->table_len)
+                return -EINVAL;
+
+        /* Set the voltage based on vsel value and write protect level is 2 */
+        return tps65217_set_bits(tps, tps->info[ldo]->set_vout_reg,
+                                        tps->info[ldo]->set_vout_mask,
+                                        selector, TPS65217_PROTECT_L2);
+}
+
+static int tps65217_pmic_ldo_set_voltage(struct regulator_dev *dev,
+                                  int min_uV, int max_uV, unsigned *selector)
+{
+        int ret;
+        struct tps65217 *tps = rdev_get_drvdata(dev);
+        unsigned int ldo = rdev_get_id(dev);
+
+        if (ldo < TPS65217_LDO_2 || ldo > TPS65217_LDO_4)
+                return -EINVAL;
+
+        if (min_uV < tps->info[ldo]->min_uV
+                || min_uV > tps->info[ldo]->max_uV)
+                return -EINVAL;
+
+        if (max_uV < tps->info[ldo]->min_uV
+                || max_uV > tps->info[ldo]->max_uV)
+                return -EINVAL;
+
+        ret = tps->info[ldo]->uv_to_vsel(min_uV, selector);
+        if (ret)
+                return ret;
+
+        /* Set the voltage based on vsel value and write protect level is 2 */
+        return tps65217_set_bits(tps, tps->info[ldo]->set_vout_reg,
+                                        tps->info[ldo]->set_vout_mask,
+                                        *selector, TPS65217_PROTECT_L2);
+}
+
+static int tps65217_pmic_dcdc_list_voltage(struct regulator_dev *dev,
+                                        unsigned selector)
+{
+        struct tps65217 *tps = rdev_get_drvdata(dev);
+        unsigned int dcdc = rdev_get_id(dev);
+
+        if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3)
+                return -EINVAL;
+
+        if (selector >= tps->info[dcdc]->table_len)
+                return -EINVAL;
+
+        return tps->info[dcdc]->vsel_to_uv(selector);
+}
+
+static int tps65217_pmic_ldo_list_voltage(struct regulator_dev *dev,
+                                        unsigned selector)
+{
+        struct tps65217 *tps = rdev_get_drvdata(dev);
+        unsigned int ldo = rdev_get_id(dev);
+
+        if (ldo < TPS65217_LDO_1 || ldo > TPS65217_LDO_4)
+                return -EINVAL;
+
+        if (selector >= tps->info[ldo]->table_len)
+                return -EINVAL;
+
+        if (tps->info[ldo]->table)
+                return tps->info[ldo]->table[selector];
+
+        return tps->info[ldo]->vsel_to_uv(selector);
+}
+
+/* Operations permitted on DCDCx */
+static struct regulator_ops tps65217_pmic_dcdc_ops = {
+        .is_enabled             = tps65217_pmic_dcdc_is_enabled,
+        .enable                 = tps65217_pmic_dcdc_enable,
+        .disable                = tps65217_pmic_dcdc_disable,
+        .get_voltage_sel        = tps65217_pmic_dcdc_get_voltage_sel,
+        .set_voltage            = tps65217_pmic_dcdc_set_voltage,
+        .list_voltage           = tps65217_pmic_dcdc_list_voltage,
+};
+
+/* Operations permitted on LDO1 */
+static struct regulator_ops tps65217_pmic_ldo1_ops = {
+        .is_enabled             = tps65217_pmic_ldo_is_enabled,
+        .enable                 = tps65217_pmic_ldo_enable,
+        .disable                = tps65217_pmic_ldo_disable,
+        .get_voltage_sel        = tps65217_pmic_ldo_get_voltage_sel,
+        .set_voltage_sel        = tps65217_pmic_ldo_set_voltage_sel,
+        .list_voltage           = tps65217_pmic_ldo_list_voltage,
+};
+
+/* Operations permitted on LDO2, LDO3 and LDO4 */
+static struct regulator_ops tps65217_pmic_ldo234_ops = {
+        .is_enabled             = tps65217_pmic_ldo_is_enabled,
+        .enable                 = tps65217_pmic_ldo_enable,
+        .disable                = tps65217_pmic_ldo_disable,
+        .get_voltage_sel        = tps65217_pmic_ldo_get_voltage_sel,
+        .set_voltage            = tps65217_pmic_ldo_set_voltage,
+        .list_voltage           = tps65217_pmic_ldo_list_voltage,
+};
+
+static struct regulator_desc regulators[] = {
+        TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1,
+                                tps65217_pmic_dcdc_ops, 64),
+        TPS65217_REGULATOR("DCDC2",TPS65217_DCDC_2,
+                                tps65217_pmic_dcdc_ops, 64),
+        TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3,
+                                tps65217_pmic_dcdc_ops, 64),
+        TPS65217_REGULATOR("LDO1", TPS65217_LDO_1,
+                                tps65217_pmic_ldo1_ops, 16),
+        TPS65217_REGULATOR("LDO2", TPS65217_LDO_2,
+                                tps65217_pmic_ldo234_ops, 64),
+        TPS65217_REGULATOR("LDO3", TPS65217_LDO_3,
+                                tps65217_pmic_ldo234_ops, 32),
+        TPS65217_REGULATOR("LDO4", TPS65217_LDO_4,
+                                tps65217_pmic_ldo234_ops, 32),
+};
+
+static int __devinit tps65217_regulator_probe(struct platform_device *pdev)
+{
+        struct regulator_dev *rdev;
+        struct tps65217 *tps;
+        struct tps_info *info = &tps65217_pmic_regs[pdev->id];
+
+        /* Already set by core driver */
+        tps = dev_to_tps65217(pdev->dev.parent);
+        tps->info[pdev->id] = info;
+
+        rdev = regulator_register(&regulators[pdev->id], &pdev->dev,
+                                  pdev->dev.platform_data, tps);
+        if (IS_ERR(rdev))
+                return PTR_ERR(rdev);
+
+        platform_set_drvdata(pdev, rdev);
+
+        return 0;
+}
+
+static int __devexit tps65217_regulator_remove(struct platform_device *pdev)
+{
+        struct regulator_dev *rdev = platform_get_drvdata(pdev);
+
+        platform_set_drvdata(pdev, NULL);
+        regulator_unregister(rdev);
+
+        return 0;
+}
+
+static struct platform_driver tps65217_regulator_driver = {
+        .driver = {
+                .name = "tps65217-pmic",
+        },
+        .probe = tps65217_regulator_probe,
+        .remove = __devexit_p(tps65217_regulator_remove),
+};
+
+static int __init tps65217_regulator_init(void)
+{
+        return platform_driver_register(&tps65217_regulator_driver);
+}
+subsys_initcall(tps65217_regulator_init);
+
+static void __exit tps65217_regulator_exit(void)
+{
+        platform_driver_unregister(&tps65217_regulator_driver);
+}
+module_exit(tps65217_regulator_exit);
+
+
+MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
+MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
+MODULE_ALIAS("platform:tps65217-pmic");
+MODULE_LICENSE("GPL v2");