diff options
Diffstat (limited to 'drivers/regulator/tps65217-regulator.c')
| -rw-r--r-- | drivers/regulator/tps65217-regulator.c | 286 |
1 files changed, 286 insertions, 0 deletions
diff --git a/drivers/regulator/tps65217-regulator.c b/drivers/regulator/tps65217-regulator.c new file mode 100644 index 000000000..d84fab616 --- /dev/null +++ b/drivers/regulator/tps65217-regulator.c @@ -0,0 +1,286 @@ +/* + * 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/of_regulator.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/mfd/tps65217.h> + +#define TPS65217_REGULATOR(_name, _id, _of_match, _ops, _n, _vr, _vm, _em, \ + _t, _lr, _nlr, _sr, _sm) \ + { \ + .name = _name, \ + .id = _id, \ + .of_match = of_match_ptr(_of_match), \ + .regulators_node= of_match_ptr("regulators"), \ + .ops = &_ops, \ + .n_voltages = _n, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .vsel_reg = _vr, \ + .vsel_mask = _vm, \ + .enable_reg = TPS65217_REG_ENABLE, \ + .enable_mask = _em, \ + .volt_table = _t, \ + .linear_ranges = _lr, \ + .n_linear_ranges = _nlr, \ + .bypass_reg = _sr, \ + .bypass_mask = _sm, \ + } \ + +static const unsigned int LDO1_VSEL_table[] = { + 1000000, 1100000, 1200000, 1250000, + 1300000, 1350000, 1400000, 1500000, + 1600000, 1800000, 2500000, 2750000, + 2800000, 3000000, 3100000, 3300000, +}; + +static const struct regulator_linear_range tps65217_uv1_ranges[] = { + REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000), + REGULATOR_LINEAR_RANGE(1550000, 25, 30, 50000), + REGULATOR_LINEAR_RANGE(1850000, 31, 52, 50000), + REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000), + REGULATOR_LINEAR_RANGE(3300000, 56, 62, 0), +}; + +static const struct regulator_linear_range tps65217_uv2_ranges[] = { + REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000), + REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000), + REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000), +}; + +static int tps65217_pmic_enable(struct regulator_dev *dev) +{ + struct tps65217 *tps = rdev_get_drvdata(dev); + int rid = rdev_get_id(dev); + + if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) + return -EINVAL; + + /* Enable the regulator and password protection is level 1 */ + return tps65217_set_bits(tps, TPS65217_REG_ENABLE, + dev->desc->enable_mask, dev->desc->enable_mask, + TPS65217_PROTECT_L1); +} + +static int tps65217_pmic_disable(struct regulator_dev *dev) +{ + struct tps65217 *tps = rdev_get_drvdata(dev); + int rid = rdev_get_id(dev); + + if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) + return -EINVAL; + + /* Disable the regulator and password protection is level 1 */ + return tps65217_clear_bits(tps, TPS65217_REG_ENABLE, + dev->desc->enable_mask, TPS65217_PROTECT_L1); +} + +static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev, + unsigned selector) +{ + int ret; + struct tps65217 *tps = rdev_get_drvdata(dev); + unsigned int rid = rdev_get_id(dev); + + /* Set the voltage based on vsel value and write protect level is 2 */ + ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, + selector, TPS65217_PROTECT_L2); + + /* Set GO bit for DCDCx to initiate voltage transistion */ + switch (rid) { + case TPS65217_DCDC_1 ... TPS65217_DCDC_3: + ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW, + TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO, + TPS65217_PROTECT_L2); + break; + } + + return ret; +} + +static int tps65217_pmic_set_suspend_enable(struct regulator_dev *dev) +{ + struct tps65217 *tps = rdev_get_drvdata(dev); + unsigned int rid = rdev_get_id(dev); + + if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) + return -EINVAL; + + return tps65217_clear_bits(tps, dev->desc->bypass_reg, + dev->desc->bypass_mask, + TPS65217_PROTECT_L1); +} + +static int tps65217_pmic_set_suspend_disable(struct regulator_dev *dev) +{ + struct tps65217 *tps = rdev_get_drvdata(dev); + unsigned int rid = rdev_get_id(dev); + + if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) + return -EINVAL; + + if (!tps->strobes[rid]) + return -EINVAL; + + return tps65217_set_bits(tps, dev->desc->bypass_reg, + dev->desc->bypass_mask, + tps->strobes[rid], TPS65217_PROTECT_L1); +} + +/* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */ +static struct regulator_ops tps65217_pmic_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = tps65217_pmic_enable, + .disable = tps65217_pmic_disable, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = tps65217_pmic_set_voltage_sel, + .list_voltage = regulator_list_voltage_linear_range, + .map_voltage = regulator_map_voltage_linear_range, + .set_suspend_enable = tps65217_pmic_set_suspend_enable, + .set_suspend_disable = tps65217_pmic_set_suspend_disable, +}; + +/* Operations permitted on LDO1 */ +static struct regulator_ops tps65217_pmic_ldo1_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = tps65217_pmic_enable, + .disable = tps65217_pmic_disable, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = tps65217_pmic_set_voltage_sel, + .list_voltage = regulator_list_voltage_table, + .map_voltage = regulator_map_voltage_ascend, + .set_suspend_enable = tps65217_pmic_set_suspend_enable, + .set_suspend_disable = tps65217_pmic_set_suspend_disable, +}; + +static const struct regulator_desc regulators[] = { + TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, "dcdc1", + tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC1, + TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC1_EN, + NULL, tps65217_uv1_ranges, + ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1, + TPS65217_SEQ1_DC1_SEQ_MASK), + TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, "dcdc2", + tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC2, + TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC2_EN, + NULL, tps65217_uv1_ranges, + ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1, + TPS65217_SEQ1_DC2_SEQ_MASK), + TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, "dcdc3", + tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC3, + TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC3_EN, + NULL, tps65217_uv1_ranges, + ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ2, + TPS65217_SEQ2_DC3_SEQ_MASK), + TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, "ldo1", + tps65217_pmic_ldo1_ops, 16, TPS65217_REG_DEFLDO1, + TPS65217_DEFLDO1_LDO1_MASK, TPS65217_ENABLE_LDO1_EN, + LDO1_VSEL_table, NULL, 0, TPS65217_REG_SEQ2, + TPS65217_SEQ2_LDO1_SEQ_MASK), + TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, "ldo2", tps65217_pmic_ops, + 64, TPS65217_REG_DEFLDO2, + TPS65217_DEFLDO2_LDO2_MASK, TPS65217_ENABLE_LDO2_EN, + NULL, tps65217_uv1_ranges, + ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ3, + TPS65217_SEQ3_LDO2_SEQ_MASK), + TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, "ldo3", tps65217_pmic_ops, + 32, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK, + TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN, + NULL, tps65217_uv2_ranges, + ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ3, + TPS65217_SEQ3_LDO3_SEQ_MASK), + TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, "ldo4", tps65217_pmic_ops, + 32, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK, + TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN, + NULL, tps65217_uv2_ranges, + ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ4, + TPS65217_SEQ4_LDO4_SEQ_MASK), +}; + +static int tps65217_regulator_probe(struct platform_device *pdev) +{ + struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); + struct tps65217_board *pdata = dev_get_platdata(tps->dev); + struct regulator_dev *rdev; + struct regulator_config config = { }; + int i, ret; + unsigned int val; + + /* Allocate memory for strobes */ + tps->strobes = devm_kcalloc(&pdev->dev, + TPS65217_NUM_REGULATOR, sizeof(u8), + GFP_KERNEL); + if (!tps->strobes) + return -ENOMEM; + + platform_set_drvdata(pdev, tps); + + for (i = 0; i < TPS65217_NUM_REGULATOR; i++) { + /* Register the regulators */ + config.dev = tps->dev; + if (pdata) + config.init_data = pdata->tps65217_init_data[i]; + config.driver_data = tps; + config.regmap = tps->regmap; + + rdev = devm_regulator_register(&pdev->dev, ®ulators[i], + &config); + if (IS_ERR(rdev)) { + dev_err(tps->dev, "failed to register %s regulator\n", + pdev->name); + return PTR_ERR(rdev); + } + + /* Store default strobe info */ + ret = tps65217_reg_read(tps, regulators[i].bypass_reg, &val); + tps->strobes[i] = val & regulators[i].bypass_mask; + } + + return 0; +} + +static struct platform_driver tps65217_regulator_driver = { + .driver = { + .name = "tps65217-pmic", + }, + .probe = tps65217_regulator_probe, +}; + +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"); |