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545 lines
13 KiB
C
545 lines
13 KiB
C
/*
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* tps65023-regulator.c
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*
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* Supports TPS65023 Regulator
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*
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* Copyright (C) 2009 Texas Instrument Incorporated - http://www.ti.com/
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
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* whether express or implied; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/regmap.h>
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/* Register definitions */
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#define TPS65023_REG_VERSION 0
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#define TPS65023_REG_PGOODZ 1
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#define TPS65023_REG_MASK 2
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#define TPS65023_REG_REG_CTRL 3
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#define TPS65023_REG_CON_CTRL 4
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#define TPS65023_REG_CON_CTRL2 5
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#define TPS65023_REG_DEF_CORE 6
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#define TPS65023_REG_DEFSLEW 7
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#define TPS65023_REG_LDO_CTRL 8
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/* PGOODZ bitfields */
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#define TPS65023_PGOODZ_PWRFAILZ BIT(7)
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#define TPS65023_PGOODZ_LOWBATTZ BIT(6)
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#define TPS65023_PGOODZ_VDCDC1 BIT(5)
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#define TPS65023_PGOODZ_VDCDC2 BIT(4)
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#define TPS65023_PGOODZ_VDCDC3 BIT(3)
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#define TPS65023_PGOODZ_LDO2 BIT(2)
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#define TPS65023_PGOODZ_LDO1 BIT(1)
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/* MASK bitfields */
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#define TPS65023_MASK_PWRFAILZ BIT(7)
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#define TPS65023_MASK_LOWBATTZ BIT(6)
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#define TPS65023_MASK_VDCDC1 BIT(5)
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#define TPS65023_MASK_VDCDC2 BIT(4)
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#define TPS65023_MASK_VDCDC3 BIT(3)
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#define TPS65023_MASK_LDO2 BIT(2)
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#define TPS65023_MASK_LDO1 BIT(1)
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/* REG_CTRL bitfields */
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#define TPS65023_REG_CTRL_VDCDC1_EN BIT(5)
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#define TPS65023_REG_CTRL_VDCDC2_EN BIT(4)
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#define TPS65023_REG_CTRL_VDCDC3_EN BIT(3)
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#define TPS65023_REG_CTRL_LDO2_EN BIT(2)
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#define TPS65023_REG_CTRL_LDO1_EN BIT(1)
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/* REG_CTRL2 bitfields */
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#define TPS65023_REG_CTRL2_GO BIT(7)
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#define TPS65023_REG_CTRL2_CORE_ADJ BIT(6)
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#define TPS65023_REG_CTRL2_DCDC2 BIT(2)
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#define TPS65023_REG_CTRL2_DCDC1 BIT(1)
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#define TPS65023_REG_CTRL2_DCDC3 BIT(0)
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/* LDO_CTRL bitfields */
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#define TPS65023_LDO_CTRL_LDOx_SHIFT(ldo_id) ((ldo_id)*4)
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#define TPS65023_LDO_CTRL_LDOx_MASK(ldo_id) (0x0F << ((ldo_id)*4))
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/* Number of step-down converters available */
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#define TPS65023_NUM_DCDC 3
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/* Number of LDO voltage regulators available */
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#define TPS65023_NUM_LDO 2
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/* Number of total regulators available */
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#define TPS65023_NUM_REGULATOR (TPS65023_NUM_DCDC + TPS65023_NUM_LDO)
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/* DCDCs */
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#define TPS65023_DCDC_1 0
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#define TPS65023_DCDC_2 1
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#define TPS65023_DCDC_3 2
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/* LDOs */
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#define TPS65023_LDO_1 3
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#define TPS65023_LDO_2 4
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#define TPS65023_MAX_REG_ID TPS65023_LDO_2
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/* Supported voltage values for regulators */
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static const u16 VCORE_VSEL_table[] = {
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800, 825, 850, 875,
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900, 925, 950, 975,
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1000, 1025, 1050, 1075,
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1100, 1125, 1150, 1175,
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1200, 1225, 1250, 1275,
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1300, 1325, 1350, 1375,
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1400, 1425, 1450, 1475,
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1500, 1525, 1550, 1600,
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};
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/* Supported voltage values for LDO regulators for tps65020 */
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static const u16 TPS65020_LDO1_VSEL_table[] = {
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1000, 1050, 1100, 1300,
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1800, 2500, 3000, 3300,
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};
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static const u16 TPS65020_LDO2_VSEL_table[] = {
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1000, 1050, 1100, 1300,
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1800, 2500, 3000, 3300,
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};
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/* Supported voltage values for LDO regulators
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* for tps65021 and tps65023 */
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static const u16 TPS65023_LDO1_VSEL_table[] = {
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1000, 1100, 1300, 1800,
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2200, 2600, 2800, 3150,
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};
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static const u16 TPS65023_LDO2_VSEL_table[] = {
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1050, 1200, 1300, 1800,
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2500, 2800, 3000, 3300,
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};
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/* Regulator specific details */
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struct tps_info {
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const char *name;
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unsigned min_uV;
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unsigned max_uV;
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bool fixed;
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u8 table_len;
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const u16 *table;
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};
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/* PMIC details */
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struct tps_pmic {
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struct regulator_desc desc[TPS65023_NUM_REGULATOR];
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struct regulator_dev *rdev[TPS65023_NUM_REGULATOR];
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const struct tps_info *info[TPS65023_NUM_REGULATOR];
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struct regmap *regmap;
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u8 core_regulator;
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};
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/* Struct passed as driver data */
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struct tps_driver_data {
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const struct tps_info *info;
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u8 core_regulator;
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};
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static int tps65023_dcdc_get_voltage(struct regulator_dev *dev)
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{
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struct tps_pmic *tps = rdev_get_drvdata(dev);
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int ret;
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int data, dcdc = rdev_get_id(dev);
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if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
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return -EINVAL;
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if (dcdc == tps->core_regulator) {
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ret = regmap_read(tps->regmap, TPS65023_REG_DEF_CORE, &data);
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if (ret != 0)
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return ret;
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data &= (tps->info[dcdc]->table_len - 1);
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return tps->info[dcdc]->table[data] * 1000;
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} else
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return tps->info[dcdc]->min_uV;
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}
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static int tps65023_dcdc_set_voltage_sel(struct regulator_dev *dev,
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unsigned selector)
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{
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struct tps_pmic *tps = rdev_get_drvdata(dev);
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int dcdc = rdev_get_id(dev);
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int ret;
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if (dcdc != tps->core_regulator)
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return -EINVAL;
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ret = regmap_write(tps->regmap, TPS65023_REG_DEF_CORE, selector);
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if (ret)
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goto out;
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/* Tell the chip that we have changed the value in DEFCORE
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* and its time to update the core voltage
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*/
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ret = regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2,
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TPS65023_REG_CTRL2_GO, TPS65023_REG_CTRL2_GO);
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out:
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return ret;
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}
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static int tps65023_ldo_get_voltage(struct regulator_dev *dev)
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{
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struct tps_pmic *tps = rdev_get_drvdata(dev);
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int data, ldo = rdev_get_id(dev);
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int ret;
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if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
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return -EINVAL;
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ret = regmap_read(tps->regmap, TPS65023_REG_LDO_CTRL, &data);
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if (ret != 0)
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return ret;
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data >>= (TPS65023_LDO_CTRL_LDOx_SHIFT(ldo - TPS65023_LDO_1));
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data &= (tps->info[ldo]->table_len - 1);
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return tps->info[ldo]->table[data] * 1000;
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}
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static int tps65023_ldo_set_voltage_sel(struct regulator_dev *dev,
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unsigned selector)
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{
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struct tps_pmic *tps = rdev_get_drvdata(dev);
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int ldo_index = rdev_get_id(dev) - TPS65023_LDO_1;
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return regmap_update_bits(tps->regmap, TPS65023_REG_LDO_CTRL,
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TPS65023_LDO_CTRL_LDOx_MASK(ldo_index),
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selector << TPS65023_LDO_CTRL_LDOx_SHIFT(ldo_index));
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}
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static int tps65023_dcdc_list_voltage(struct regulator_dev *dev,
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unsigned selector)
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{
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struct tps_pmic *tps = rdev_get_drvdata(dev);
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int dcdc = rdev_get_id(dev);
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if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
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return -EINVAL;
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if (dcdc == tps->core_regulator) {
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if (selector >= tps->info[dcdc]->table_len)
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return -EINVAL;
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else
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return tps->info[dcdc]->table[selector] * 1000;
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} else
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return tps->info[dcdc]->min_uV;
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}
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static int tps65023_ldo_list_voltage(struct regulator_dev *dev,
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unsigned selector)
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{
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struct tps_pmic *tps = rdev_get_drvdata(dev);
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int ldo = rdev_get_id(dev);
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if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
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return -EINVAL;
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if (selector >= tps->info[ldo]->table_len)
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return -EINVAL;
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else
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return tps->info[ldo]->table[selector] * 1000;
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}
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/* Operations permitted on VDCDCx */
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static struct regulator_ops tps65023_dcdc_ops = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.get_voltage = tps65023_dcdc_get_voltage,
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.set_voltage_sel = tps65023_dcdc_set_voltage_sel,
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.list_voltage = tps65023_dcdc_list_voltage,
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};
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/* Operations permitted on LDOx */
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static struct regulator_ops tps65023_ldo_ops = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.get_voltage = tps65023_ldo_get_voltage,
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.set_voltage_sel = tps65023_ldo_set_voltage_sel,
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.list_voltage = tps65023_ldo_list_voltage,
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};
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static struct regmap_config tps65023_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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static int __devinit tps_65023_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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const struct tps_driver_data *drv_data = (void *)id->driver_data;
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const struct tps_info *info = drv_data->info;
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struct regulator_config config = { };
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struct regulator_init_data *init_data;
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struct regulator_dev *rdev;
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struct tps_pmic *tps;
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int i;
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int error;
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return -EIO;
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/**
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* init_data points to array of regulator_init structures
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* coming from the board-evm file.
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*/
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init_data = client->dev.platform_data;
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if (!init_data)
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return -EIO;
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tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
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if (!tps)
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return -ENOMEM;
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tps->regmap = devm_regmap_init_i2c(client, &tps65023_regmap_config);
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if (IS_ERR(tps->regmap)) {
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error = PTR_ERR(tps->regmap);
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dev_err(&client->dev, "Failed to allocate register map: %d\n",
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error);
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return error;
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}
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/* common for all regulators */
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tps->core_regulator = drv_data->core_regulator;
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for (i = 0; i < TPS65023_NUM_REGULATOR; i++, info++, init_data++) {
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/* Store regulator specific information */
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tps->info[i] = info;
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tps->desc[i].name = info->name;
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tps->desc[i].id = i;
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tps->desc[i].n_voltages = info->table_len;
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tps->desc[i].ops = (i > TPS65023_DCDC_3 ?
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&tps65023_ldo_ops : &tps65023_dcdc_ops);
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tps->desc[i].type = REGULATOR_VOLTAGE;
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tps->desc[i].owner = THIS_MODULE;
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tps->desc[i].enable_reg = TPS65023_REG_REG_CTRL;
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if (i == TPS65023_LDO_1)
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tps->desc[i].enable_mask = 1 << 1;
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else if (i == TPS65023_LDO_2)
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tps->desc[i].enable_mask = 1 << 2;
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else /* DCDCx */
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tps->desc[i].enable_mask =
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1 << (TPS65023_NUM_REGULATOR - i);
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config.dev = &client->dev;
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config.init_data = init_data;
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config.driver_data = tps;
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config.regmap = tps->regmap;
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/* Register the regulators */
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rdev = regulator_register(&tps->desc[i], &config);
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if (IS_ERR(rdev)) {
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dev_err(&client->dev, "failed to register %s\n",
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id->name);
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error = PTR_ERR(rdev);
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goto fail;
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}
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/* Save regulator for cleanup */
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tps->rdev[i] = rdev;
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}
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i2c_set_clientdata(client, tps);
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/* Enable setting output voltage by I2C */
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regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2,
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TPS65023_REG_CTRL2_CORE_ADJ, TPS65023_REG_CTRL2_CORE_ADJ);
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return 0;
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fail:
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while (--i >= 0)
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regulator_unregister(tps->rdev[i]);
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return error;
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}
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static int __devexit tps_65023_remove(struct i2c_client *client)
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{
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struct tps_pmic *tps = i2c_get_clientdata(client);
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int i;
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for (i = 0; i < TPS65023_NUM_REGULATOR; i++)
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regulator_unregister(tps->rdev[i]);
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return 0;
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}
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static const struct tps_info tps65020_regs[] = {
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{
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.name = "VDCDC1",
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.min_uV = 3300000,
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.max_uV = 3300000,
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.fixed = 1,
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},
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{
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.name = "VDCDC2",
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.min_uV = 1800000,
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.max_uV = 1800000,
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.fixed = 1,
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},
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{
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.name = "VDCDC3",
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.min_uV = 800000,
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.max_uV = 1600000,
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.table_len = ARRAY_SIZE(VCORE_VSEL_table),
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.table = VCORE_VSEL_table,
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},
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{
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.name = "LDO1",
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.min_uV = 1000000,
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.max_uV = 3150000,
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.table_len = ARRAY_SIZE(TPS65020_LDO1_VSEL_table),
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.table = TPS65020_LDO1_VSEL_table,
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},
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{
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.name = "LDO2",
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.min_uV = 1050000,
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.max_uV = 3300000,
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.table_len = ARRAY_SIZE(TPS65020_LDO2_VSEL_table),
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.table = TPS65020_LDO2_VSEL_table,
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},
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};
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static const struct tps_info tps65021_regs[] = {
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{
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.name = "VDCDC1",
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.min_uV = 3300000,
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.max_uV = 3300000,
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.fixed = 1,
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},
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{
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.name = "VDCDC2",
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.min_uV = 1800000,
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.max_uV = 1800000,
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.fixed = 1,
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},
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{
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.name = "VDCDC3",
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.min_uV = 800000,
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.max_uV = 1600000,
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.table_len = ARRAY_SIZE(VCORE_VSEL_table),
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.table = VCORE_VSEL_table,
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},
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{
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.name = "LDO1",
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.min_uV = 1000000,
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.max_uV = 3150000,
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.table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
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.table = TPS65023_LDO1_VSEL_table,
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},
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{
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.name = "LDO2",
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.min_uV = 1050000,
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.max_uV = 3300000,
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.table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
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.table = TPS65023_LDO2_VSEL_table,
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},
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};
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static const struct tps_info tps65023_regs[] = {
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{
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.name = "VDCDC1",
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.min_uV = 800000,
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.max_uV = 1600000,
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.table_len = ARRAY_SIZE(VCORE_VSEL_table),
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.table = VCORE_VSEL_table,
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},
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{
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.name = "VDCDC2",
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.min_uV = 3300000,
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.max_uV = 3300000,
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.fixed = 1,
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},
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{
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.name = "VDCDC3",
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.min_uV = 1800000,
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.max_uV = 1800000,
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.fixed = 1,
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|
},
|
|
{
|
|
.name = "LDO1",
|
|
.min_uV = 1000000,
|
|
.max_uV = 3150000,
|
|
.table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
|
|
.table = TPS65023_LDO1_VSEL_table,
|
|
},
|
|
{
|
|
.name = "LDO2",
|
|
.min_uV = 1050000,
|
|
.max_uV = 3300000,
|
|
.table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
|
|
.table = TPS65023_LDO2_VSEL_table,
|
|
},
|
|
};
|
|
|
|
static struct tps_driver_data tps65020_drv_data = {
|
|
.info = tps65020_regs,
|
|
.core_regulator = TPS65023_DCDC_3,
|
|
};
|
|
|
|
static struct tps_driver_data tps65021_drv_data = {
|
|
.info = tps65021_regs,
|
|
.core_regulator = TPS65023_DCDC_3,
|
|
};
|
|
|
|
static struct tps_driver_data tps65023_drv_data = {
|
|
.info = tps65023_regs,
|
|
.core_regulator = TPS65023_DCDC_1,
|
|
};
|
|
|
|
static const struct i2c_device_id tps_65023_id[] = {
|
|
{.name = "tps65023",
|
|
.driver_data = (unsigned long) &tps65023_drv_data},
|
|
{.name = "tps65021",
|
|
.driver_data = (unsigned long) &tps65021_drv_data,},
|
|
{.name = "tps65020",
|
|
.driver_data = (unsigned long) &tps65020_drv_data},
|
|
{ },
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, tps_65023_id);
|
|
|
|
static struct i2c_driver tps_65023_i2c_driver = {
|
|
.driver = {
|
|
.name = "tps65023",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = tps_65023_probe,
|
|
.remove = __devexit_p(tps_65023_remove),
|
|
.id_table = tps_65023_id,
|
|
};
|
|
|
|
static int __init tps_65023_init(void)
|
|
{
|
|
return i2c_add_driver(&tps_65023_i2c_driver);
|
|
}
|
|
subsys_initcall(tps_65023_init);
|
|
|
|
static void __exit tps_65023_cleanup(void)
|
|
{
|
|
i2c_del_driver(&tps_65023_i2c_driver);
|
|
}
|
|
module_exit(tps_65023_cleanup);
|
|
|
|
MODULE_AUTHOR("Texas Instruments");
|
|
MODULE_DESCRIPTION("TPS65023 voltage regulator driver");
|
|
MODULE_LICENSE("GPL v2");
|