diff options
Diffstat (limited to 'drivers/regulator/tps6586x-regulator.c')
| -rw-r--r-- | drivers/regulator/tps6586x-regulator.c | 387 |
1 files changed, 387 insertions, 0 deletions
diff --git a/drivers/regulator/tps6586x-regulator.c b/drivers/regulator/tps6586x-regulator.c new file mode 100644 index 0000000..76cc41e --- /dev/null +++ b/drivers/regulator/tps6586x-regulator.c @@ -0,0 +1,387 @@ +/* + * Regulator driver for TI TPS6586x + * + * Copyright (C) 2010 Compulab Ltd. + * Author: Mike Rapoport <mike@compulab.co.il> + * + * Based on da903x + * Copyright (C) 2006-2008 Marvell International Ltd. + * Copyright (C) 2008 Compulab Ltd. + * + * 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. + */ + +#define DEBUG +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/err.h> +#include <linux/slab.h> +#include <linux/platform_device.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/mfd/tps6586x.h> + +/* supply control and voltage setting */ +#define TPS6586X_SUPPLYENA 0x10 +#define TPS6586X_SUPPLYENB 0x11 +#define TPS6586X_SUPPLYENC 0x12 +#define TPS6586X_SUPPLYEND 0x13 +#define TPS6586X_SUPPLYENE 0x14 +#define TPS6586X_VCC1 0x20 +#define TPS6586X_VCC2 0x21 +#define TPS6586X_SM1V1 0x23 +#define TPS6586X_SM1V2 0x24 +#define TPS6586X_SM1SL 0x25 +#define TPS6586X_SM0V1 0x26 +#define TPS6586X_SM0V2 0x27 +#define TPS6586X_SM0SL 0x28 +#define TPS6586X_LDO2AV1 0x29 +#define TPS6586X_LDO2AV2 0x2A +#define TPS6586X_LDO2BV1 0x2F +#define TPS6586X_LDO2BV2 0x30 +#define TPS6586X_LDO4V1 0x32 +#define TPS6586X_LDO4V2 0x33 + +/* converter settings */ +#define TPS6586X_SUPPLYV1 0x41 +#define TPS6586X_SUPPLYV2 0x42 +#define TPS6586X_SUPPLYV3 0x43 +#define TPS6586X_SUPPLYV4 0x44 +#define TPS6586X_SUPPLYV5 0x45 +#define TPS6586X_SUPPLYV6 0x46 +#define TPS6586X_SMODE1 0x47 +#define TPS6586X_SMODE2 0x48 + +struct tps6586x_regulator { + struct regulator_desc desc; + + int volt_reg; + int volt_shift; + int volt_nbits; + int enable_bit[2]; + int enable_reg[2]; + + int *voltages; + + /* for DVM regulators */ + int go_reg; + int go_bit; +}; + +static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev) +{ + return rdev_get_dev(rdev)->parent->parent; +} + +static int tps6586x_ldo_list_voltage(struct regulator_dev *rdev, + unsigned selector) +{ + struct tps6586x_regulator *info = rdev_get_drvdata(rdev); + + return info->voltages[selector]; +} + + +static int __tps6586x_ldo_set_voltage(struct device *parent, + struct tps6586x_regulator *ri, + int min_uV, int max_uV) +{ + int val, uV; + uint8_t mask; + + for (val = 0; val < ri->desc.n_voltages; val++) { + uV = ri->voltages[val] * 1000; + + /* LDO0 has minimal voltage 1.2 rather than 1.25 */ + if (ri->desc.id == TPS6586X_ID_LDO_0 && val == 0) + uV -= 50 * 1000; + + /* use the first in-range value */ + if (min_uV <= uV && uV <= max_uV) { + + val <<= ri->volt_shift; + mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift; + + return tps6586x_update(parent, ri->volt_reg, val, mask); + } + } + + return -EINVAL; +} + +static int tps6586x_ldo_set_voltage(struct regulator_dev *rdev, + int min_uV, int max_uV) +{ + struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); + struct device *parent = to_tps6586x_dev(rdev); + + return __tps6586x_ldo_set_voltage(parent, ri, min_uV, max_uV); +} + +static int tps6586x_ldo_get_voltage(struct regulator_dev *rdev) +{ + struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); + struct device *parent = to_tps6586x_dev(rdev); + uint8_t val, mask; + int ret; + + ret = tps6586x_read(parent, ri->volt_reg, &val); + if (ret) + return ret; + + mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift; + val = (val & mask) >> ri->volt_shift; + + if (val > ri->desc.n_voltages) + BUG(); + + return ri->voltages[val]; +} + +static int tps6586x_dvm_set_voltage(struct regulator_dev *rdev, + int min_uV, int max_uV) +{ + struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); + struct device *parent = to_tps6586x_dev(rdev); + int ret; + + ret = __tps6586x_ldo_set_voltage(parent, ri, min_uV, max_uV); + if (ret) + return ret; + + return tps6586x_set_bits(parent, ri->go_reg, ri->go_bit); +} + +static int tps6586x_regulator_enable(struct regulator_dev *rdev) +{ + struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); + struct device *parent = to_tps6586x_dev(rdev); + + return tps6586x_set_bits(parent, ri->enable_reg[0], + 1 << ri->enable_bit[0]); +} + +static int tps6586x_regulator_disable(struct regulator_dev *rdev) +{ + struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); + struct device *parent = to_tps6586x_dev(rdev); + + return tps6586x_clr_bits(parent, ri->enable_reg[0], + 1 << ri->enable_bit[0]); +} + +static int tps6586x_regulator_is_enabled(struct regulator_dev *rdev) +{ + struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); + struct device *parent = to_tps6586x_dev(rdev); + uint8_t reg_val; + int ret; + + ret = tps6586x_read(parent, ri->enable_reg[0], ®_val); + if (ret) + return ret; + + return !!(reg_val & (1 << ri->enable_bit[0])); +} + +static struct regulator_ops tps6586x_regulator_ldo_ops = { + .list_voltage = tps6586x_ldo_list_voltage, + .get_voltage = tps6586x_ldo_get_voltage, + .set_voltage = tps6586x_ldo_set_voltage, + + .is_enabled = tps6586x_regulator_is_enabled, + .enable = tps6586x_regulator_enable, + .disable = tps6586x_regulator_disable, +}; + +static struct regulator_ops tps6586x_regulator_dvm_ops = { + .list_voltage = tps6586x_ldo_list_voltage, + .get_voltage = tps6586x_ldo_get_voltage, + .set_voltage = tps6586x_dvm_set_voltage, + + .is_enabled = tps6586x_regulator_is_enabled, + .enable = tps6586x_regulator_enable, + .disable = tps6586x_regulator_disable, +}; + +static int tps6586x_ldo_voltages[] = { + 1250, 1500, 1800, 2500, 2700, 2850, 3100, 3300, +}; + +static int tps6586x_ldo4_voltages[] = { + 1700, 1725, 1750, 1775, 1800, 1825, 1850, 1875, + 1900, 1925, 1950, 1975, 2000, 2025, 2050, 2075, + 2100, 2125, 2150, 2175, 2200, 2225, 2250, 2275, + 2300, 2325, 2350, 2375, 2400, 2425, 2450, 2475, +}; + +static int tps6586x_dvm_voltages[] = { + 725, 750, 775, 800, 825, 850, 875, 900, + 925, 950, 975, 1000, 1025, 1050, 1075, 1100, + 1125, 1150, 1175, 1200, 1225, 1250, 1275, 1300, + 1325, 1350, 1375, 1400, 1425, 1450, 1475, 1500, +}; + +#define TPS6586X_REGULATOR(_id, vdata, _ops, vreg, shift, nbits, \ + ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ +{ \ + .desc = { \ + .name = "REG-" #_id, \ + .ops = &tps6586x_regulator_##_ops, \ + .type = REGULATOR_VOLTAGE, \ + .id = TPS6586X_ID_##_id, \ + .n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages), \ + .owner = THIS_MODULE, \ + }, \ + .volt_reg = TPS6586X_##vreg, \ + .volt_shift = (shift), \ + .volt_nbits = (nbits), \ + .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \ + .enable_bit[0] = (ebit0), \ + .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \ + .enable_bit[1] = (ebit1), \ + .voltages = tps6586x_##vdata##_voltages, \ +} + +#define TPS6586X_LDO(_id, vdata, vreg, shift, nbits, \ + ereg0, ebit0, ereg1, ebit1) \ + TPS6586X_REGULATOR(_id, vdata, ldo_ops, vreg, shift, nbits, \ + ereg0, ebit0, ereg1, ebit1, 0, 0) + +#define TPS6586X_DVM(_id, vdata, vreg, shift, nbits, \ + ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ + TPS6586X_REGULATOR(_id, vdata, dvm_ops, vreg, shift, nbits, \ + ereg0, ebit0, ereg1, ebit1, goreg, gobit) + +static struct tps6586x_regulator tps6586x_regulator[] = { + TPS6586X_LDO(LDO_0, ldo, SUPPLYV1, 5, 3, ENC, 0, END, 0), + TPS6586X_LDO(LDO_3, ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2), + TPS6586X_LDO(LDO_5, ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6), + TPS6586X_LDO(LDO_6, ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4), + TPS6586X_LDO(LDO_7, ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5), + TPS6586X_LDO(LDO_8, ldo, SUPPLYV1, 5, 3, ENC, 6, END, 6), + TPS6586X_LDO(LDO_9, ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7), + TPS6586X_LDO(LDO_RTC, ldo, SUPPLYV4, 3, 3, ENE, 7, ENE, 7), + TPS6586X_LDO(LDO_1, dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1), + TPS6586X_LDO(SM_2, dvm, SUPPLYV2, 0, 5, ENC, 1, END, 1), + + TPS6586X_DVM(LDO_2, dvm, LDO2BV1, 0, 5, ENA, 3, ENB, 3, VCC2, 6), + TPS6586X_DVM(LDO_4, ldo4, LDO4V1, 0, 5, ENC, 3, END, 3, VCC1, 6), + TPS6586X_DVM(SM_0, dvm, SM0V1, 0, 5, ENA, 1, ENB, 1, VCC1, 2), + TPS6586X_DVM(SM_1, dvm, SM1V1, 0, 5, ENA, 0, ENB, 0, VCC1, 0), +}; + +/* + * TPS6586X has 2 enable bits that are OR'ed to determine the actual + * regulator state. Clearing one of this bits allows switching + * regulator on and of with single register write. + */ +static inline int tps6586x_regulator_preinit(struct device *parent, + struct tps6586x_regulator *ri) +{ + uint8_t val1, val2; + int ret; + + ret = tps6586x_read(parent, ri->enable_reg[0], &val1); + if (ret) + return ret; + + ret = tps6586x_read(parent, ri->enable_reg[1], &val2); + if (ret) + return ret; + + if (!(val2 & ri->enable_bit[1])) + return 0; + + /* + * The regulator is on, but it's enabled with the bit we don't + * want to use, so we switch the enable bits + */ + if (!(val1 & ri->enable_bit[0])) { + ret = tps6586x_set_bits(parent, ri->enable_reg[0], + 1 << ri->enable_bit[0]); + if (ret) + return ret; + } + + return tps6586x_clr_bits(parent, ri->enable_reg[1], + 1 << ri->enable_bit[1]); +} + +static inline struct tps6586x_regulator *find_regulator_info(int id) +{ + struct tps6586x_regulator *ri; + int i; + + for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) { + ri = &tps6586x_regulator[i]; + if (ri->desc.id == id) + return ri; + } + return NULL; +} + +static int __devinit tps6586x_regulator_probe(struct platform_device *pdev) +{ + struct tps6586x_regulator *ri = NULL; + struct regulator_dev *rdev; + int id = pdev->id; + int err; + + dev_dbg(&pdev->dev, "Probing reulator %d\n", id); + + ri = find_regulator_info(id); + if (ri == NULL) { + dev_err(&pdev->dev, "invalid regulator ID specified\n"); + return -EINVAL; + } + + err = tps6586x_regulator_preinit(pdev->dev.parent, ri); + if (err) + return err; + + rdev = regulator_register(&ri->desc, &pdev->dev, + pdev->dev.platform_data, ri); + if (IS_ERR(rdev)) { + dev_err(&pdev->dev, "failed to register regulator %s\n", + ri->desc.name); + return PTR_ERR(rdev); + } + + platform_set_drvdata(pdev, ri); + + return 0; +} + +static int __devexit tps6586x_regulator_remove(struct platform_device *pdev) +{ + return 0; +} + +static struct platform_driver tps6586x_regulator_driver = { + .driver = { + .name = "tps6586x-regulator", + .owner = THIS_MODULE, + }, + .probe = tps6586x_regulator_probe, + .remove = __devexit_p(tps6586x_regulator_remove), +}; + +static int __init tps6586x_regulator_init(void) +{ + return platform_driver_register(&tps6586x_regulator_driver); +} +subsys_initcall(tps6586x_regulator_init); + +static void __exit tps6586x_regulator_exit(void) +{ + platform_driver_unregister(&tps6586x_regulator_driver); +} +module_exit(tps6586x_regulator_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); +MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC"); +MODULE_ALIAS("platform:tps6586x-regulator"); |
