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linux/drivers/regulator/tps65910-regulator.c
Jan Remmet 8f9165c981 regulator: tps65910: Work around silicon erratum SWCZ010 
http://www.ti.com/lit/pdf/SWCZ010:
  DCDC o/p voltage can go higher than programmed value

Impact:
VDDI, VDD2, and VIO output programmed voltage level can go higher than
expected or crash, when coming out of PFM to PWM mode or using DVFS.

Description:
When DCDC CLK SYNC bits are 11/01:
* VIO 3-MHz oscillator is the source clock of the digital core and input
  clock of VDD1 and VDD2
* Turn-on of VDD1 and VDD2 HSD PFETis synchronized or at a constant
  phase shift
* Current pulled though VCC1+VCC2 is Iload(VDD1) + Iload(VDD2)
* The 3 HSD PFET will be turned-on at the same time, causing the highest
  possible switching noise on the application. This noise level depends
  on the layout, the VBAT level, and the load current. The noise level
  increases with improper layout.

When DCDC CLK SYNC bits are 00:
* VIO 3-MHz oscillator is the source clock of digital core
* VDD1 and VDD2 are running on their own 3-MHz oscillator
* Current pulled though VCC1+VCC2 average of Iload(VDD1) + Iload(VDD2)
* The switching noise of the 3 SMPS will be randomly spread over time,
  causing lower overall switching noise.

Workaround:
Set DCDCCTRL_REG[1:0]= 00.

Signed-off-by: Jan Remmet <j.remmet@phytec.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2016-09-24 19:04:36 +01:00

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/*
* tps65910.c -- TI tps65910
*
* Copyright 2010 Texas Instruments Inc.
*
* Author: Graeme Gregory <gg@slimlogic.co.uk>
* Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
*
* 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; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/mfd/tps65910.h>
#include <linux/regulator/of_regulator.h>
#define TPS65910_SUPPLY_STATE_ENABLED 0x1
#define EXT_SLEEP_CONTROL (TPS65910_SLEEP_CONTROL_EXT_INPUT_EN1 | \
TPS65910_SLEEP_CONTROL_EXT_INPUT_EN2 | \
TPS65910_SLEEP_CONTROL_EXT_INPUT_EN3 | \
TPS65911_SLEEP_CONTROL_EXT_INPUT_SLEEP)
/* supported VIO voltages in microvolts */
static const unsigned int VIO_VSEL_table[] = {
1500000, 1800000, 2500000, 3300000,
};
/* VSEL tables for TPS65910 specific LDOs and dcdc's */
/* supported VRTC voltages in microvolts */
static const unsigned int VRTC_VSEL_table[] = {
1800000,
};
/* supported VDD3 voltages in microvolts */
static const unsigned int VDD3_VSEL_table[] = {
5000000,
};
/* supported VDIG1 voltages in microvolts */
static const unsigned int VDIG1_VSEL_table[] = {
1200000, 1500000, 1800000, 2700000,
};
/* supported VDIG2 voltages in microvolts */
static const unsigned int VDIG2_VSEL_table[] = {
1000000, 1100000, 1200000, 1800000,
};
/* supported VPLL voltages in microvolts */
static const unsigned int VPLL_VSEL_table[] = {
1000000, 1100000, 1800000, 2500000,
};
/* supported VDAC voltages in microvolts */
static const unsigned int VDAC_VSEL_table[] = {
1800000, 2600000, 2800000, 2850000,
};
/* supported VAUX1 voltages in microvolts */
static const unsigned int VAUX1_VSEL_table[] = {
1800000, 2500000, 2800000, 2850000,
};
/* supported VAUX2 voltages in microvolts */
static const unsigned int VAUX2_VSEL_table[] = {
1800000, 2800000, 2900000, 3300000,
};
/* supported VAUX33 voltages in microvolts */
static const unsigned int VAUX33_VSEL_table[] = {
1800000, 2000000, 2800000, 3300000,
};
/* supported VMMC voltages in microvolts */
static const unsigned int VMMC_VSEL_table[] = {
1800000, 2800000, 3000000, 3300000,
};
/* supported BBCH voltages in microvolts */
static const unsigned int VBB_VSEL_table[] = {
3000000, 2520000, 3150000, 5000000,
};
struct tps_info {
const char *name;
const char *vin_name;
u8 n_voltages;
const unsigned int *voltage_table;
int enable_time_us;
};
static struct tps_info tps65910_regs[] = {
{
.name = "vrtc",
.vin_name = "vcc7",
.n_voltages = ARRAY_SIZE(VRTC_VSEL_table),
.voltage_table = VRTC_VSEL_table,
.enable_time_us = 2200,
},
{
.name = "vio",
.vin_name = "vccio",
.n_voltages = ARRAY_SIZE(VIO_VSEL_table),
.voltage_table = VIO_VSEL_table,
.enable_time_us = 350,
},
{
.name = "vdd1",
.vin_name = "vcc1",
.enable_time_us = 350,
},
{
.name = "vdd2",
.vin_name = "vcc2",
.enable_time_us = 350,
},
{
.name = "vdd3",
.n_voltages = ARRAY_SIZE(VDD3_VSEL_table),
.voltage_table = VDD3_VSEL_table,
.enable_time_us = 200,
},
{
.name = "vdig1",
.vin_name = "vcc6",
.n_voltages = ARRAY_SIZE(VDIG1_VSEL_table),
.voltage_table = VDIG1_VSEL_table,
.enable_time_us = 100,
},
{
.name = "vdig2",
.vin_name = "vcc6",
.n_voltages = ARRAY_SIZE(VDIG2_VSEL_table),
.voltage_table = VDIG2_VSEL_table,
.enable_time_us = 100,
},
{
.name = "vpll",
.vin_name = "vcc5",
.n_voltages = ARRAY_SIZE(VPLL_VSEL_table),
.voltage_table = VPLL_VSEL_table,
.enable_time_us = 100,
},
{
.name = "vdac",
.vin_name = "vcc5",
.n_voltages = ARRAY_SIZE(VDAC_VSEL_table),
.voltage_table = VDAC_VSEL_table,
.enable_time_us = 100,
},
{
.name = "vaux1",
.vin_name = "vcc4",
.n_voltages = ARRAY_SIZE(VAUX1_VSEL_table),
.voltage_table = VAUX1_VSEL_table,
.enable_time_us = 100,
},
{
.name = "vaux2",
.vin_name = "vcc4",
.n_voltages = ARRAY_SIZE(VAUX2_VSEL_table),
.voltage_table = VAUX2_VSEL_table,
.enable_time_us = 100,
},
{
.name = "vaux33",
.vin_name = "vcc3",
.n_voltages = ARRAY_SIZE(VAUX33_VSEL_table),
.voltage_table = VAUX33_VSEL_table,
.enable_time_us = 100,
},
{
.name = "vmmc",
.vin_name = "vcc3",
.n_voltages = ARRAY_SIZE(VMMC_VSEL_table),
.voltage_table = VMMC_VSEL_table,
.enable_time_us = 100,
},
{
.name = "vbb",
.vin_name = "vcc7",
.n_voltages = ARRAY_SIZE(VBB_VSEL_table),
.voltage_table = VBB_VSEL_table,
},
};
static struct tps_info tps65911_regs[] = {
{
.name = "vrtc",
.vin_name = "vcc7",
.enable_time_us = 2200,
},
{
.name = "vio",
.vin_name = "vccio",
.n_voltages = ARRAY_SIZE(VIO_VSEL_table),
.voltage_table = VIO_VSEL_table,
.enable_time_us = 350,
},
{
.name = "vdd1",
.vin_name = "vcc1",
.n_voltages = 0x4C,
.enable_time_us = 350,
},
{
.name = "vdd2",
.vin_name = "vcc2",
.n_voltages = 0x4C,
.enable_time_us = 350,
},
{
.name = "vddctrl",
.n_voltages = 0x44,
.enable_time_us = 900,
},
{
.name = "ldo1",
.vin_name = "vcc6",
.n_voltages = 0x33,
.enable_time_us = 420,
},
{
.name = "ldo2",
.vin_name = "vcc6",
.n_voltages = 0x33,
.enable_time_us = 420,
},
{
.name = "ldo3",
.vin_name = "vcc5",
.n_voltages = 0x1A,
.enable_time_us = 230,
},
{
.name = "ldo4",
.vin_name = "vcc5",
.n_voltages = 0x33,
.enable_time_us = 230,
},
{
.name = "ldo5",
.vin_name = "vcc4",
.n_voltages = 0x1A,
.enable_time_us = 230,
},
{
.name = "ldo6",
.vin_name = "vcc3",
.n_voltages = 0x1A,
.enable_time_us = 230,
},
{
.name = "ldo7",
.vin_name = "vcc3",
.n_voltages = 0x1A,
.enable_time_us = 230,
},
{
.name = "ldo8",
.vin_name = "vcc3",
.n_voltages = 0x1A,
.enable_time_us = 230,
},
};
#define EXT_CONTROL_REG_BITS(id, regs_offs, bits) (((regs_offs) << 8) | (bits))
static unsigned int tps65910_ext_sleep_control[] = {
0,
EXT_CONTROL_REG_BITS(VIO, 1, 0),
EXT_CONTROL_REG_BITS(VDD1, 1, 1),
EXT_CONTROL_REG_BITS(VDD2, 1, 2),
EXT_CONTROL_REG_BITS(VDD3, 1, 3),
EXT_CONTROL_REG_BITS(VDIG1, 0, 1),
EXT_CONTROL_REG_BITS(VDIG2, 0, 2),
EXT_CONTROL_REG_BITS(VPLL, 0, 6),
EXT_CONTROL_REG_BITS(VDAC, 0, 7),
EXT_CONTROL_REG_BITS(VAUX1, 0, 3),
EXT_CONTROL_REG_BITS(VAUX2, 0, 4),
EXT_CONTROL_REG_BITS(VAUX33, 0, 5),
EXT_CONTROL_REG_BITS(VMMC, 0, 0),
};
static unsigned int tps65911_ext_sleep_control[] = {
0,
EXT_CONTROL_REG_BITS(VIO, 1, 0),
EXT_CONTROL_REG_BITS(VDD1, 1, 1),
EXT_CONTROL_REG_BITS(VDD2, 1, 2),
EXT_CONTROL_REG_BITS(VDDCTRL, 1, 3),
EXT_CONTROL_REG_BITS(LDO1, 0, 1),
EXT_CONTROL_REG_BITS(LDO2, 0, 2),
EXT_CONTROL_REG_BITS(LDO3, 0, 7),
EXT_CONTROL_REG_BITS(LDO4, 0, 6),
EXT_CONTROL_REG_BITS(LDO5, 0, 3),
EXT_CONTROL_REG_BITS(LDO6, 0, 0),
EXT_CONTROL_REG_BITS(LDO7, 0, 5),
EXT_CONTROL_REG_BITS(LDO8, 0, 4),
};
struct tps65910_reg {
struct regulator_desc *desc;
struct tps65910 *mfd;
struct regulator_dev **rdev;
struct tps_info **info;
int num_regulators;
int mode;
int (*get_ctrl_reg)(int);
unsigned int *ext_sleep_control;
unsigned int board_ext_control[TPS65910_NUM_REGS];
};
static int tps65910_get_ctrl_register(int id)
{
switch (id) {
case TPS65910_REG_VRTC:
return TPS65910_VRTC;
case TPS65910_REG_VIO:
return TPS65910_VIO;
case TPS65910_REG_VDD1:
return TPS65910_VDD1;
case TPS65910_REG_VDD2:
return TPS65910_VDD2;
case TPS65910_REG_VDD3:
return TPS65910_VDD3;
case TPS65910_REG_VDIG1:
return TPS65910_VDIG1;
case TPS65910_REG_VDIG2:
return TPS65910_VDIG2;
case TPS65910_REG_VPLL:
return TPS65910_VPLL;
case TPS65910_REG_VDAC:
return TPS65910_VDAC;
case TPS65910_REG_VAUX1:
return TPS65910_VAUX1;
case TPS65910_REG_VAUX2:
return TPS65910_VAUX2;
case TPS65910_REG_VAUX33:
return TPS65910_VAUX33;
case TPS65910_REG_VMMC:
return TPS65910_VMMC;
case TPS65910_REG_VBB:
return TPS65910_BBCH;
default:
return -EINVAL;
}
}
static int tps65911_get_ctrl_register(int id)
{
switch (id) {
case TPS65910_REG_VRTC:
return TPS65910_VRTC;
case TPS65910_REG_VIO:
return TPS65910_VIO;
case TPS65910_REG_VDD1:
return TPS65910_VDD1;
case TPS65910_REG_VDD2:
return TPS65910_VDD2;
case TPS65911_REG_VDDCTRL:
return TPS65911_VDDCTRL;
case TPS65911_REG_LDO1:
return TPS65911_LDO1;
case TPS65911_REG_LDO2:
return TPS65911_LDO2;
case TPS65911_REG_LDO3:
return TPS65911_LDO3;
case TPS65911_REG_LDO4:
return TPS65911_LDO4;
case TPS65911_REG_LDO5:
return TPS65911_LDO5;
case TPS65911_REG_LDO6:
return TPS65911_LDO6;
case TPS65911_REG_LDO7:
return TPS65911_LDO7;
case TPS65911_REG_LDO8:
return TPS65911_LDO8;
default:
return -EINVAL;
}
}
static int tps65910_set_mode(struct regulator_dev *dev, unsigned int mode)
{
struct tps65910_reg *pmic = rdev_get_drvdata(dev);
struct tps65910 *mfd = pmic->mfd;
int reg, value, id = rdev_get_id(dev);
reg = pmic->get_ctrl_reg(id);
if (reg < 0)
return reg;
switch (mode) {
case REGULATOR_MODE_NORMAL:
return tps65910_reg_update_bits(pmic->mfd, reg,
LDO_ST_MODE_BIT | LDO_ST_ON_BIT,
LDO_ST_ON_BIT);
case REGULATOR_MODE_IDLE:
value = LDO_ST_ON_BIT | LDO_ST_MODE_BIT;
return tps65910_reg_set_bits(mfd, reg, value);
case REGULATOR_MODE_STANDBY:
return tps65910_reg_clear_bits(mfd, reg, LDO_ST_ON_BIT);
}
return -EINVAL;
}
static unsigned int tps65910_get_mode(struct regulator_dev *dev)
{
struct tps65910_reg *pmic = rdev_get_drvdata(dev);
int ret, reg, value, id = rdev_get_id(dev);
reg = pmic->get_ctrl_reg(id);
if (reg < 0)
return reg;
ret = tps65910_reg_read(pmic->mfd, reg, &value);
if (ret < 0)
return ret;
if (!(value & LDO_ST_ON_BIT))
return REGULATOR_MODE_STANDBY;
else if (value & LDO_ST_MODE_BIT)
return REGULATOR_MODE_IDLE;
else
return REGULATOR_MODE_NORMAL;
}
static int tps65910_get_voltage_dcdc_sel(struct regulator_dev *dev)
{
struct tps65910_reg *pmic = rdev_get_drvdata(dev);
int ret, id = rdev_get_id(dev);
int opvsel = 0, srvsel = 0, vselmax = 0, mult = 0, sr = 0;
switch (id) {
case TPS65910_REG_VDD1:
ret = tps65910_reg_read(pmic->mfd, TPS65910_VDD1_OP, &opvsel);
if (ret < 0)
return ret;
ret = tps65910_reg_read(pmic->mfd, TPS65910_VDD1, &mult);
if (ret < 0)
return ret;
mult = (mult & VDD1_VGAIN_SEL_MASK) >> VDD1_VGAIN_SEL_SHIFT;
ret = tps65910_reg_read(pmic->mfd, TPS65910_VDD1_SR, &srvsel);
if (ret < 0)
return ret;
sr = opvsel & VDD1_OP_CMD_MASK;
opvsel &= VDD1_OP_SEL_MASK;
srvsel &= VDD1_SR_SEL_MASK;
vselmax = 75;
break;
case TPS65910_REG_VDD2:
ret = tps65910_reg_read(pmic->mfd, TPS65910_VDD2_OP, &opvsel);
if (ret < 0)
return ret;
ret = tps65910_reg_read(pmic->mfd, TPS65910_VDD2, &mult);
if (ret < 0)
return ret;
mult = (mult & VDD2_VGAIN_SEL_MASK) >> VDD2_VGAIN_SEL_SHIFT;
ret = tps65910_reg_read(pmic->mfd, TPS65910_VDD2_SR, &srvsel);
if (ret < 0)
return ret;
sr = opvsel & VDD2_OP_CMD_MASK;
opvsel &= VDD2_OP_SEL_MASK;
srvsel &= VDD2_SR_SEL_MASK;
vselmax = 75;
break;
case TPS65911_REG_VDDCTRL:
ret = tps65910_reg_read(pmic->mfd, TPS65911_VDDCTRL_OP,
&opvsel);
if (ret < 0)
return ret;
ret = tps65910_reg_read(pmic->mfd, TPS65911_VDDCTRL_SR,
&srvsel);
if (ret < 0)
return ret;
sr = opvsel & VDDCTRL_OP_CMD_MASK;
opvsel &= VDDCTRL_OP_SEL_MASK;
srvsel &= VDDCTRL_SR_SEL_MASK;
vselmax = 64;
break;
}
/* multiplier 0 == 1 but 2,3 normal */
if (!mult)
mult = 1;
if (sr) {
/* normalise to valid range */
if (srvsel < 3)
srvsel = 3;
if (srvsel > vselmax)
srvsel = vselmax;
return srvsel - 3;
} else {
/* normalise to valid range*/
if (opvsel < 3)
opvsel = 3;
if (opvsel > vselmax)
opvsel = vselmax;
return opvsel - 3;
}
return -EINVAL;
}
static int tps65910_get_voltage_sel(struct regulator_dev *dev)
{
struct tps65910_reg *pmic = rdev_get_drvdata(dev);
int ret, reg, value, id = rdev_get_id(dev);
reg = pmic->get_ctrl_reg(id);
if (reg < 0)
return reg;
ret = tps65910_reg_read(pmic->mfd, reg, &value);
if (ret < 0)
return ret;
switch (id) {
case TPS65910_REG_VIO:
case TPS65910_REG_VDIG1:
case TPS65910_REG_VDIG2:
case TPS65910_REG_VPLL:
case TPS65910_REG_VDAC:
case TPS65910_REG_VAUX1:
case TPS65910_REG_VAUX2:
case TPS65910_REG_VAUX33:
case TPS65910_REG_VMMC:
value &= LDO_SEL_MASK;
value >>= LDO_SEL_SHIFT;
break;
case TPS65910_REG_VBB:
value &= BBCH_BBSEL_MASK;
value >>= BBCH_BBSEL_SHIFT;
break;
default:
return -EINVAL;
}
return value;
}
static int tps65910_get_voltage_vdd3(struct regulator_dev *dev)
{
return dev->desc->volt_table[0];
}
static int tps65911_get_voltage_sel(struct regulator_dev *dev)
{
struct tps65910_reg *pmic = rdev_get_drvdata(dev);
int ret, id = rdev_get_id(dev);
unsigned int value, reg;
reg = pmic->get_ctrl_reg(id);
ret = tps65910_reg_read(pmic->mfd, reg, &value);
if (ret < 0)
return ret;
switch (id) {
case TPS65911_REG_LDO1:
case TPS65911_REG_LDO2:
case TPS65911_REG_LDO4:
value &= LDO1_SEL_MASK;
value >>= LDO_SEL_SHIFT;
break;
case TPS65911_REG_LDO3:
case TPS65911_REG_LDO5:
case TPS65911_REG_LDO6:
case TPS65911_REG_LDO7:
case TPS65911_REG_LDO8:
value &= LDO3_SEL_MASK;
value >>= LDO_SEL_SHIFT;
break;
case TPS65910_REG_VIO:
value &= LDO_SEL_MASK;
value >>= LDO_SEL_SHIFT;
break;
default:
return -EINVAL;
}
return value;
}
static int tps65910_set_voltage_dcdc_sel(struct regulator_dev *dev,
unsigned selector)
{
struct tps65910_reg *pmic = rdev_get_drvdata(dev);
int id = rdev_get_id(dev), vsel;
int dcdc_mult = 0;
switch (id) {
case TPS65910_REG_VDD1:
dcdc_mult = (selector / VDD1_2_NUM_VOLT_FINE) + 1;
if (dcdc_mult == 1)
dcdc_mult--;
vsel = (selector % VDD1_2_NUM_VOLT_FINE) + 3;
tps65910_reg_update_bits(pmic->mfd, TPS65910_VDD1,
VDD1_VGAIN_SEL_MASK,
dcdc_mult << VDD1_VGAIN_SEL_SHIFT);
tps65910_reg_write(pmic->mfd, TPS65910_VDD1_OP, vsel);
break;
case TPS65910_REG_VDD2:
dcdc_mult = (selector / VDD1_2_NUM_VOLT_FINE) + 1;
if (dcdc_mult == 1)
dcdc_mult--;
vsel = (selector % VDD1_2_NUM_VOLT_FINE) + 3;
tps65910_reg_update_bits(pmic->mfd, TPS65910_VDD2,
VDD1_VGAIN_SEL_MASK,
dcdc_mult << VDD2_VGAIN_SEL_SHIFT);
tps65910_reg_write(pmic->mfd, TPS65910_VDD2_OP, vsel);
break;
case TPS65911_REG_VDDCTRL:
vsel = selector + 3;
tps65910_reg_write(pmic->mfd, TPS65911_VDDCTRL_OP, vsel);
}
return 0;
}
static int tps65910_set_voltage_sel(struct regulator_dev *dev,
unsigned selector)
{
struct tps65910_reg *pmic = rdev_get_drvdata(dev);
int reg, id = rdev_get_id(dev);
reg = pmic->get_ctrl_reg(id);
if (reg < 0)
return reg;
switch (id) {
case TPS65910_REG_VIO:
case TPS65910_REG_VDIG1:
case TPS65910_REG_VDIG2:
case TPS65910_REG_VPLL:
case TPS65910_REG_VDAC:
case TPS65910_REG_VAUX1:
case TPS65910_REG_VAUX2:
case TPS65910_REG_VAUX33:
case TPS65910_REG_VMMC:
return tps65910_reg_update_bits(pmic->mfd, reg, LDO_SEL_MASK,
selector << LDO_SEL_SHIFT);
case TPS65910_REG_VBB:
return tps65910_reg_update_bits(pmic->mfd, reg, BBCH_BBSEL_MASK,
selector << BBCH_BBSEL_SHIFT);
}
return -EINVAL;
}
static int tps65911_set_voltage_sel(struct regulator_dev *dev,
unsigned selector)
{
struct tps65910_reg *pmic = rdev_get_drvdata(dev);
int reg, id = rdev_get_id(dev);
reg = pmic->get_ctrl_reg(id);
if (reg < 0)
return reg;
switch (id) {
case TPS65911_REG_LDO1:
case TPS65911_REG_LDO2:
case TPS65911_REG_LDO4:
return tps65910_reg_update_bits(pmic->mfd, reg, LDO1_SEL_MASK,
selector << LDO_SEL_SHIFT);
case TPS65911_REG_LDO3:
case TPS65911_REG_LDO5:
case TPS65911_REG_LDO6:
case TPS65911_REG_LDO7:
case TPS65911_REG_LDO8:
return tps65910_reg_update_bits(pmic->mfd, reg, LDO3_SEL_MASK,
selector << LDO_SEL_SHIFT);
case TPS65910_REG_VIO:
return tps65910_reg_update_bits(pmic->mfd, reg, LDO_SEL_MASK,
selector << LDO_SEL_SHIFT);
case TPS65910_REG_VBB:
return tps65910_reg_update_bits(pmic->mfd, reg, BBCH_BBSEL_MASK,
selector << BBCH_BBSEL_SHIFT);
}
return -EINVAL;
}
static int tps65910_list_voltage_dcdc(struct regulator_dev *dev,
unsigned selector)
{
int volt, mult = 1, id = rdev_get_id(dev);
switch (id) {
case TPS65910_REG_VDD1:
case TPS65910_REG_VDD2:
mult = (selector / VDD1_2_NUM_VOLT_FINE) + 1;
volt = VDD1_2_MIN_VOLT +
(selector % VDD1_2_NUM_VOLT_FINE) * VDD1_2_OFFSET;
break;
case TPS65911_REG_VDDCTRL:
volt = VDDCTRL_MIN_VOLT + (selector * VDDCTRL_OFFSET);
break;
default:
BUG();
return -EINVAL;
}
return volt * 100 * mult;
}
static int tps65911_list_voltage(struct regulator_dev *dev, unsigned selector)
{
struct tps65910_reg *pmic = rdev_get_drvdata(dev);
int step_mv = 0, id = rdev_get_id(dev);
switch (id) {
case TPS65911_REG_LDO1:
case TPS65911_REG_LDO2:
case TPS65911_REG_LDO4:
/* The first 5 values of the selector correspond to 1V */
if (selector < 5)
selector = 0;
else
selector -= 4;
step_mv = 50;
break;
case TPS65911_REG_LDO3:
case TPS65911_REG_LDO5:
case TPS65911_REG_LDO6:
case TPS65911_REG_LDO7:
case TPS65911_REG_LDO8:
/* The first 3 values of the selector correspond to 1V */
if (selector < 3)
selector = 0;
else
selector -= 2;
step_mv = 100;
break;
case TPS65910_REG_VIO:
return pmic->info[id]->voltage_table[selector];
default:
return -EINVAL;
}
return (LDO_MIN_VOLT + selector * step_mv) * 1000;
}
/* Regulator ops (except VRTC) */
static struct regulator_ops tps65910_ops_dcdc = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.set_mode = tps65910_set_mode,
.get_mode = tps65910_get_mode,
.get_voltage_sel = tps65910_get_voltage_dcdc_sel,
.set_voltage_sel = tps65910_set_voltage_dcdc_sel,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.list_voltage = tps65910_list_voltage_dcdc,
.map_voltage = regulator_map_voltage_ascend,
};
static struct regulator_ops tps65910_ops_vdd3 = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.set_mode = tps65910_set_mode,
.get_mode = tps65910_get_mode,
.get_voltage = tps65910_get_voltage_vdd3,
.list_voltage = regulator_list_voltage_table,
.map_voltage = regulator_map_voltage_ascend,
};
static struct regulator_ops tps65910_ops_vbb = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.set_mode = tps65910_set_mode,
.get_mode = tps65910_get_mode,
.get_voltage_sel = tps65910_get_voltage_sel,
.set_voltage_sel = tps65910_set_voltage_sel,
.list_voltage = regulator_list_voltage_table,
.map_voltage = regulator_map_voltage_iterate,
};
static struct regulator_ops tps65910_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.set_mode = tps65910_set_mode,
.get_mode = tps65910_get_mode,
.get_voltage_sel = tps65910_get_voltage_sel,
.set_voltage_sel = tps65910_set_voltage_sel,
.list_voltage = regulator_list_voltage_table,
.map_voltage = regulator_map_voltage_ascend,
};
static struct regulator_ops tps65911_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.set_mode = tps65910_set_mode,
.get_mode = tps65910_get_mode,
.get_voltage_sel = tps65911_get_voltage_sel,
.set_voltage_sel = tps65911_set_voltage_sel,
.list_voltage = tps65911_list_voltage,
.map_voltage = regulator_map_voltage_ascend,
};
static int tps65910_set_ext_sleep_config(struct tps65910_reg *pmic,
int id, int ext_sleep_config)
{
struct tps65910 *mfd = pmic->mfd;
u8 regoffs = (pmic->ext_sleep_control[id] >> 8) & 0xFF;
u8 bit_pos = (1 << pmic->ext_sleep_control[id] & 0xFF);
int ret;
/*
* Regulator can not be control from multiple external input EN1, EN2
* and EN3 together.
*/
if (ext_sleep_config & EXT_SLEEP_CONTROL) {
int en_count;
en_count = ((ext_sleep_config &
TPS65910_SLEEP_CONTROL_EXT_INPUT_EN1) != 0);
en_count += ((ext_sleep_config &
TPS65910_SLEEP_CONTROL_EXT_INPUT_EN2) != 0);
en_count += ((ext_sleep_config &
TPS65910_SLEEP_CONTROL_EXT_INPUT_EN3) != 0);
en_count += ((ext_sleep_config &
TPS65911_SLEEP_CONTROL_EXT_INPUT_SLEEP) != 0);
if (en_count > 1) {
dev_err(mfd->dev,
"External sleep control flag is not proper\n");
return -EINVAL;
}
}
pmic->board_ext_control[id] = ext_sleep_config;
/* External EN1 control */
if (ext_sleep_config & TPS65910_SLEEP_CONTROL_EXT_INPUT_EN1)
ret = tps65910_reg_set_bits(mfd,
TPS65910_EN1_LDO_ASS + regoffs, bit_pos);
else
ret = tps65910_reg_clear_bits(mfd,
TPS65910_EN1_LDO_ASS + regoffs, bit_pos);
if (ret < 0) {
dev_err(mfd->dev,
"Error in configuring external control EN1\n");
return ret;
}
/* External EN2 control */
if (ext_sleep_config & TPS65910_SLEEP_CONTROL_EXT_INPUT_EN2)
ret = tps65910_reg_set_bits(mfd,
TPS65910_EN2_LDO_ASS + regoffs, bit_pos);
else
ret = tps65910_reg_clear_bits(mfd,
TPS65910_EN2_LDO_ASS + regoffs, bit_pos);
if (ret < 0) {
dev_err(mfd->dev,
"Error in configuring external control EN2\n");
return ret;
}
/* External EN3 control for TPS65910 LDO only */
if ((tps65910_chip_id(mfd) == TPS65910) &&
(id >= TPS65910_REG_VDIG1)) {
if (ext_sleep_config & TPS65910_SLEEP_CONTROL_EXT_INPUT_EN3)
ret = tps65910_reg_set_bits(mfd,
TPS65910_EN3_LDO_ASS + regoffs, bit_pos);
else
ret = tps65910_reg_clear_bits(mfd,
TPS65910_EN3_LDO_ASS + regoffs, bit_pos);
if (ret < 0) {
dev_err(mfd->dev,
"Error in configuring external control EN3\n");
return ret;
}
}
/* Return if no external control is selected */
if (!(ext_sleep_config & EXT_SLEEP_CONTROL)) {
/* Clear all sleep controls */
ret = tps65910_reg_clear_bits(mfd,
TPS65910_SLEEP_KEEP_LDO_ON + regoffs, bit_pos);
if (!ret)
ret = tps65910_reg_clear_bits(mfd,
TPS65910_SLEEP_SET_LDO_OFF + regoffs, bit_pos);
if (ret < 0)
dev_err(mfd->dev,
"Error in configuring SLEEP register\n");
return ret;
}
/*
* For regulator that has separate operational and sleep register make
* sure that operational is used and clear sleep register to turn
* regulator off when external control is inactive
*/
if ((id == TPS65910_REG_VDD1) ||
(id == TPS65910_REG_VDD2) ||
((id == TPS65911_REG_VDDCTRL) &&
(tps65910_chip_id(mfd) == TPS65911))) {
int op_reg_add = pmic->get_ctrl_reg(id) + 1;
int sr_reg_add = pmic->get_ctrl_reg(id) + 2;
int opvsel, srvsel;
ret = tps65910_reg_read(pmic->mfd, op_reg_add, &opvsel);
if (ret < 0)
return ret;
ret = tps65910_reg_read(pmic->mfd, sr_reg_add, &srvsel);
if (ret < 0)
return ret;
if (opvsel & VDD1_OP_CMD_MASK) {
u8 reg_val = srvsel & VDD1_OP_SEL_MASK;
ret = tps65910_reg_write(pmic->mfd, op_reg_add,
reg_val);
if (ret < 0) {
dev_err(mfd->dev,
"Error in configuring op register\n");
return ret;
}
}
ret = tps65910_reg_write(pmic->mfd, sr_reg_add, 0);
if (ret < 0) {
dev_err(mfd->dev, "Error in setting sr register\n");
return ret;
}
}
ret = tps65910_reg_clear_bits(mfd,
TPS65910_SLEEP_KEEP_LDO_ON + regoffs, bit_pos);
if (!ret) {
if (ext_sleep_config & TPS65911_SLEEP_CONTROL_EXT_INPUT_SLEEP)
ret = tps65910_reg_set_bits(mfd,
TPS65910_SLEEP_SET_LDO_OFF + regoffs, bit_pos);
else
ret = tps65910_reg_clear_bits(mfd,
TPS65910_SLEEP_SET_LDO_OFF + regoffs, bit_pos);
}
if (ret < 0)
dev_err(mfd->dev,
"Error in configuring SLEEP register\n");
return ret;
}
#ifdef CONFIG_OF
static struct of_regulator_match tps65910_matches[] = {
{ .name = "vrtc", .driver_data = (void *) &tps65910_regs[0] },
{ .name = "vio", .driver_data = (void *) &tps65910_regs[1] },
{ .name = "vdd1", .driver_data = (void *) &tps65910_regs[2] },
{ .name = "vdd2", .driver_data = (void *) &tps65910_regs[3] },
{ .name = "vdd3", .driver_data = (void *) &tps65910_regs[4] },
{ .name = "vdig1", .driver_data = (void *) &tps65910_regs[5] },
{ .name = "vdig2", .driver_data = (void *) &tps65910_regs[6] },
{ .name = "vpll", .driver_data = (void *) &tps65910_regs[7] },
{ .name = "vdac", .driver_data = (void *) &tps65910_regs[8] },
{ .name = "vaux1", .driver_data = (void *) &tps65910_regs[9] },
{ .name = "vaux2", .driver_data = (void *) &tps65910_regs[10] },
{ .name = "vaux33", .driver_data = (void *) &tps65910_regs[11] },
{ .name = "vmmc", .driver_data = (void *) &tps65910_regs[12] },
{ .name = "vbb", .driver_data = (void *) &tps65910_regs[13] },
};
static struct of_regulator_match tps65911_matches[] = {
{ .name = "vrtc", .driver_data = (void *) &tps65911_regs[0] },
{ .name = "vio", .driver_data = (void *) &tps65911_regs[1] },
{ .name = "vdd1", .driver_data = (void *) &tps65911_regs[2] },
{ .name = "vdd2", .driver_data = (void *) &tps65911_regs[3] },
{ .name = "vddctrl", .driver_data = (void *) &tps65911_regs[4] },
{ .name = "ldo1", .driver_data = (void *) &tps65911_regs[5] },
{ .name = "ldo2", .driver_data = (void *) &tps65911_regs[6] },
{ .name = "ldo3", .driver_data = (void *) &tps65911_regs[7] },
{ .name = "ldo4", .driver_data = (void *) &tps65911_regs[8] },
{ .name = "ldo5", .driver_data = (void *) &tps65911_regs[9] },
{ .name = "ldo6", .driver_data = (void *) &tps65911_regs[10] },
{ .name = "ldo7", .driver_data = (void *) &tps65911_regs[11] },
{ .name = "ldo8", .driver_data = (void *) &tps65911_regs[12] },
};
static struct tps65910_board *tps65910_parse_dt_reg_data(
struct platform_device *pdev,
struct of_regulator_match **tps65910_reg_matches)
{
struct tps65910_board *pmic_plat_data;
struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent);
struct device_node *np, *regulators;
struct of_regulator_match *matches;
unsigned int prop;
int idx = 0, ret, count;
pmic_plat_data = devm_kzalloc(&pdev->dev, sizeof(*pmic_plat_data),
GFP_KERNEL);
if (!pmic_plat_data)
return NULL;
np = pdev->dev.parent->of_node;
regulators = of_get_child_by_name(np, "regulators");
if (!regulators) {
dev_err(&pdev->dev, "regulator node not found\n");
return NULL;
}
switch (tps65910_chip_id(tps65910)) {
case TPS65910:
count = ARRAY_SIZE(tps65910_matches);
matches = tps65910_matches;
break;
case TPS65911:
count = ARRAY_SIZE(tps65911_matches);
matches = tps65911_matches;
break;
default:
of_node_put(regulators);
dev_err(&pdev->dev, "Invalid tps chip version\n");
return NULL;
}
ret = of_regulator_match(&pdev->dev, regulators, matches, count);
of_node_put(regulators);
if (ret < 0) {
dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
ret);
return NULL;
}
*tps65910_reg_matches = matches;
for (idx = 0; idx < count; idx++) {
if (!matches[idx].of_node)
continue;
pmic_plat_data->tps65910_pmic_init_data[idx] =
matches[idx].init_data;
ret = of_property_read_u32(matches[idx].of_node,
"ti,regulator-ext-sleep-control", &prop);
if (!ret)
pmic_plat_data->regulator_ext_sleep_control[idx] = prop;
}
return pmic_plat_data;
}
#else
static inline struct tps65910_board *tps65910_parse_dt_reg_data(
struct platform_device *pdev,
struct of_regulator_match **tps65910_reg_matches)
{
*tps65910_reg_matches = NULL;
return NULL;
}
#endif
static int tps65910_probe(struct platform_device *pdev)
{
struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent);
struct regulator_config config = { };
struct tps_info *info;
struct regulator_dev *rdev;
struct tps65910_reg *pmic;
struct tps65910_board *pmic_plat_data;
struct of_regulator_match *tps65910_reg_matches = NULL;
int i, err;
pmic_plat_data = dev_get_platdata(tps65910->dev);
if (!pmic_plat_data && tps65910->dev->of_node)
pmic_plat_data = tps65910_parse_dt_reg_data(pdev,
&tps65910_reg_matches);
if (!pmic_plat_data) {
dev_err(&pdev->dev, "Platform data not found\n");
return -EINVAL;
}
pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
if (!pmic)
return -ENOMEM;
pmic->mfd = tps65910;
platform_set_drvdata(pdev, pmic);
/* Give control of all register to control port */
tps65910_reg_set_bits(pmic->mfd, TPS65910_DEVCTRL,
DEVCTRL_SR_CTL_I2C_SEL_MASK);
switch (tps65910_chip_id(tps65910)) {
case TPS65910:
pmic->get_ctrl_reg = &tps65910_get_ctrl_register;
pmic->num_regulators = ARRAY_SIZE(tps65910_regs);
pmic->ext_sleep_control = tps65910_ext_sleep_control;
info = tps65910_regs;
/* Work around silicon erratum SWCZ010: output programmed
* voltage level can go higher than expected or crash
* Workaround: use no synchronization of DCDC clocks
*/
tps65910_reg_clear_bits(pmic->mfd, TPS65910_DCDCCTRL,
DCDCCTRL_DCDCCKSYNC_MASK);
break;
case TPS65911:
pmic->get_ctrl_reg = &tps65911_get_ctrl_register;
pmic->num_regulators = ARRAY_SIZE(tps65911_regs);
pmic->ext_sleep_control = tps65911_ext_sleep_control;
info = tps65911_regs;
break;
default:
dev_err(&pdev->dev, "Invalid tps chip version\n");
return -ENODEV;
}
pmic->desc = devm_kzalloc(&pdev->dev, pmic->num_regulators *
sizeof(struct regulator_desc), GFP_KERNEL);
if (!pmic->desc)
return -ENOMEM;
pmic->info = devm_kzalloc(&pdev->dev, pmic->num_regulators *
sizeof(struct tps_info *), GFP_KERNEL);
if (!pmic->info)
return -ENOMEM;
pmic->rdev = devm_kzalloc(&pdev->dev, pmic->num_regulators *
sizeof(struct regulator_dev *), GFP_KERNEL);
if (!pmic->rdev)
return -ENOMEM;
for (i = 0; i < pmic->num_regulators && i < TPS65910_NUM_REGS;
i++, info++) {
/* Register the regulators */
pmic->info[i] = info;
pmic->desc[i].name = info->name;
pmic->desc[i].supply_name = info->vin_name;
pmic->desc[i].id = i;
pmic->desc[i].n_voltages = info->n_voltages;
pmic->desc[i].enable_time = info->enable_time_us;
if (i == TPS65910_REG_VDD1 || i == TPS65910_REG_VDD2) {
pmic->desc[i].ops = &tps65910_ops_dcdc;
pmic->desc[i].n_voltages = VDD1_2_NUM_VOLT_FINE *
VDD1_2_NUM_VOLT_COARSE;
pmic->desc[i].ramp_delay = 12500;
} else if (i == TPS65910_REG_VDD3) {
if (tps65910_chip_id(tps65910) == TPS65910) {
pmic->desc[i].ops = &tps65910_ops_vdd3;
pmic->desc[i].volt_table = info->voltage_table;
} else {
pmic->desc[i].ops = &tps65910_ops_dcdc;
pmic->desc[i].ramp_delay = 5000;
}
} else if (i == TPS65910_REG_VBB &&
tps65910_chip_id(tps65910) == TPS65910) {
pmic->desc[i].ops = &tps65910_ops_vbb;
pmic->desc[i].volt_table = info->voltage_table;
} else {
if (tps65910_chip_id(tps65910) == TPS65910) {
pmic->desc[i].ops = &tps65910_ops;
pmic->desc[i].volt_table = info->voltage_table;
} else {
pmic->desc[i].ops = &tps65911_ops;
}
}
err = tps65910_set_ext_sleep_config(pmic, i,
pmic_plat_data->regulator_ext_sleep_control[i]);
/*
* Failing on regulator for configuring externally control
* is not a serious issue, just throw warning.
*/
if (err < 0)
dev_warn(tps65910->dev,
"Failed to initialise ext control config\n");
pmic->desc[i].type = REGULATOR_VOLTAGE;
pmic->desc[i].owner = THIS_MODULE;
pmic->desc[i].enable_reg = pmic->get_ctrl_reg(i);
pmic->desc[i].enable_mask = TPS65910_SUPPLY_STATE_ENABLED;
config.dev = tps65910->dev;
config.init_data = pmic_plat_data->tps65910_pmic_init_data[i];
config.driver_data = pmic;
config.regmap = tps65910->regmap;
if (tps65910_reg_matches)
config.of_node = tps65910_reg_matches[i].of_node;
rdev = devm_regulator_register(&pdev->dev, &pmic->desc[i],
&config);
if (IS_ERR(rdev)) {
dev_err(tps65910->dev,
"failed to register %s regulator\n",
pdev->name);
return PTR_ERR(rdev);
}
/* Save regulator for cleanup */
pmic->rdev[i] = rdev;
}
return 0;
}
static void tps65910_shutdown(struct platform_device *pdev)
{
struct tps65910_reg *pmic = platform_get_drvdata(pdev);
int i;
/*
* Before bootloader jumps to kernel, it makes sure that required
* external control signals are in desired state so that given rails
* can be configure accordingly.
* If rails are configured to be controlled from external control
* then before shutting down/rebooting the system, the external
* control configuration need to be remove from the rails so that
* its output will be available as per register programming even
* if external controls are removed. This is require when the POR
* value of the control signals are not in active state and before
* bootloader initializes it, the system requires the rail output
* to be active for booting.
*/
for (i = 0; i < pmic->num_regulators; i++) {
int err;
if (!pmic->rdev[i])
continue;
err = tps65910_set_ext_sleep_config(pmic, i, 0);
if (err < 0)
dev_err(&pdev->dev,
"Error in clearing external control\n");
}
}
static struct platform_driver tps65910_driver = {
.driver = {
.name = "tps65910-pmic",
},
.probe = tps65910_probe,
.shutdown = tps65910_shutdown,
};
static int __init tps65910_init(void)
{
return platform_driver_register(&tps65910_driver);
}
subsys_initcall(tps65910_init);
static void __exit tps65910_cleanup(void)
{
platform_driver_unregister(&tps65910_driver);
}
module_exit(tps65910_cleanup);
MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
MODULE_DESCRIPTION("TPS65910/TPS65911 voltage regulator driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:tps65910-pmic");
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