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linux_dsm_epyc7002/drivers/regulator/bd718x7-regulator.c
Matti Vaittinen e770b18bbb
regulator: bd718x7: Change next state after poweroff to ready 
BD71837 and BD71847 have a HW functionality which leave power
rails OFF after powerof state:
- if they have been controlled by SW.
- if state transition from poweroff is done to SNVS

BD71837 can after reset transition from power-off to SNVS or
READY state depending on reset reason. By default only wathcdog
reset changes state from poweroff to ready. Change PMIC
configuration to always transition to READY in order to avoid
crucial power rails being OFF after reset.

If SNVS is required the crucial power rails should not be
controlled by SW - eg corresponding regulator control register
should have SEL bit kept zero. Currently the driver assumes all
regulators to be controlled by SW so it sets all SEL bits to 1.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-11-13 16:27:05 -08:00

1144 lines
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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 ROHM Semiconductors
// bd71837-regulator.c ROHM BD71837MWV/BD71847MWV regulator driver
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/rohm-bd718x7.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>
/*
* BUCK1/2/3/4
* BUCK1RAMPRATE[1:0] BUCK1 DVS ramp rate setting
* 00: 10.00mV/usec 10mV 1uS
* 01: 5.00mV/usec 10mV 2uS
* 10: 2.50mV/usec 10mV 4uS
* 11: 1.25mV/usec 10mV 8uS
*/
static int bd718xx_buck1234_set_ramp_delay(struct regulator_dev *rdev,
int ramp_delay)
{
int id = rdev->desc->id;
unsigned int ramp_value = BUCK_RAMPRATE_10P00MV;
dev_dbg(&rdev->dev, "Buck[%d] Set Ramp = %d\n", id + 1,
ramp_delay);
switch (ramp_delay) {
case 1 ... 1250:
ramp_value = BUCK_RAMPRATE_1P25MV;
break;
case 1251 ... 2500:
ramp_value = BUCK_RAMPRATE_2P50MV;
break;
case 2501 ... 5000:
ramp_value = BUCK_RAMPRATE_5P00MV;
break;
case 5001 ... 10000:
ramp_value = BUCK_RAMPRATE_10P00MV;
break;
default:
ramp_value = BUCK_RAMPRATE_10P00MV;
dev_err(&rdev->dev,
"%s: ramp_delay: %d not supported, setting 10000mV//us\n",
rdev->desc->name, ramp_delay);
}
return regmap_update_bits(rdev->regmap, BD718XX_REG_BUCK1_CTRL + id,
BUCK_RAMPRATE_MASK, ramp_value << 6);
}
/* Bucks 1 to 4 support DVS. PWM mode is used when voltage is changed.
* Bucks 5 to 8 and LDOs can use PFM and must be disabled when voltage
* is changed. Hence we return -EBUSY for these if voltage is changed
* when BUCK/LDO is enabled.
*/
static int bd718xx_set_voltage_sel_restricted(struct regulator_dev *rdev,
unsigned int sel)
{
if (regulator_is_enabled_regmap(rdev))
return -EBUSY;
return regulator_set_voltage_sel_regmap(rdev, sel);
}
static int bd718xx_set_voltage_sel_pickable_restricted(
struct regulator_dev *rdev, unsigned int sel)
{
if (regulator_is_enabled_regmap(rdev))
return -EBUSY;
return regulator_set_voltage_sel_pickable_regmap(rdev, sel);
}
static struct regulator_ops bd718xx_pickable_range_ldo_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_pickable_linear_range,
.set_voltage_sel = bd718xx_set_voltage_sel_pickable_restricted,
.get_voltage_sel = regulator_get_voltage_sel_pickable_regmap,
};
static struct regulator_ops bd718xx_pickable_range_buck_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_pickable_linear_range,
.set_voltage_sel = bd718xx_set_voltage_sel_pickable_restricted,
.get_voltage_sel = regulator_get_voltage_sel_pickable_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
};
static struct regulator_ops bd718xx_ldo_regulator_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.set_voltage_sel = bd718xx_set_voltage_sel_restricted,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
};
static struct regulator_ops bd718xx_ldo_regulator_nolinear_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_table,
.set_voltage_sel = bd718xx_set_voltage_sel_restricted,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
};
static struct regulator_ops bd718xx_buck_regulator_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.set_voltage_sel = bd718xx_set_voltage_sel_restricted,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
};
static struct regulator_ops bd718xx_buck_regulator_nolinear_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_table,
.map_voltage = regulator_map_voltage_ascend,
.set_voltage_sel = bd718xx_set_voltage_sel_restricted,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
};
static struct regulator_ops bd718xx_dvs_buck_regulator_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.set_ramp_delay = bd718xx_buck1234_set_ramp_delay,
};
/*
* BD71837 BUCK1/2/3/4
* BD71847 BUCK1/2
* 0.70 to 1.30V (10mV step)
*/
static const struct regulator_linear_range bd718xx_dvs_buck_volts[] = {
REGULATOR_LINEAR_RANGE(700000, 0x00, 0x3C, 10000),
REGULATOR_LINEAR_RANGE(1300000, 0x3D, 0x3F, 0),
};
/*
* BD71837 BUCK5
* 0.7V to 1.35V (range 0)
* and
* 0.675 to 1.325 (range 1)
*/
static const struct regulator_linear_range bd71837_buck5_volts[] = {
/* Ranges when VOLT_SEL bit is 0 */
REGULATOR_LINEAR_RANGE(700000, 0x00, 0x03, 100000),
REGULATOR_LINEAR_RANGE(1050000, 0x04, 0x05, 50000),
REGULATOR_LINEAR_RANGE(1200000, 0x06, 0x07, 150000),
/* Ranges when VOLT_SEL bit is 1 */
REGULATOR_LINEAR_RANGE(675000, 0x0, 0x3, 100000),
REGULATOR_LINEAR_RANGE(1025000, 0x4, 0x5, 50000),
REGULATOR_LINEAR_RANGE(1175000, 0x6, 0x7, 150000),
};
/*
* Range selector for first 3 linear ranges is 0x0
* and 0x1 for last 3 ranges.
*/
static const unsigned int bd71837_buck5_volt_range_sel[] = {
0x0, 0x0, 0x0, 0x80, 0x80, 0x80
};
/*
* BD71847 BUCK3
*/
static const struct regulator_linear_range bd71847_buck3_volts[] = {
/* Ranges when VOLT_SEL bits are 00 */
REGULATOR_LINEAR_RANGE(700000, 0x00, 0x03, 100000),
REGULATOR_LINEAR_RANGE(1050000, 0x04, 0x05, 50000),
REGULATOR_LINEAR_RANGE(1200000, 0x06, 0x07, 150000),
/* Ranges when VOLT_SEL bits are 01 */
REGULATOR_LINEAR_RANGE(550000, 0x0, 0x7, 50000),
/* Ranges when VOLT_SEL bits are 11 */
REGULATOR_LINEAR_RANGE(675000, 0x0, 0x3, 100000),
REGULATOR_LINEAR_RANGE(1025000, 0x4, 0x5, 50000),
REGULATOR_LINEAR_RANGE(1175000, 0x6, 0x7, 150000),
};
static const unsigned int bd71847_buck3_volt_range_sel[] = {
0x0, 0x0, 0x0, 0x40, 0x80, 0x80, 0x80
};
static const struct regulator_linear_range bd71847_buck4_volts[] = {
REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
REGULATOR_LINEAR_RANGE(2600000, 0x00, 0x03, 100000),
};
static const unsigned int bd71847_buck4_volt_range_sel[] = { 0x0, 0x40 };
/*
* BUCK6
* 3.0V to 3.3V (step 100mV)
*/
static const struct regulator_linear_range bd71837_buck6_volts[] = {
REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
};
/*
* BD71837 BUCK7
* BD71847 BUCK5
* 000 = 1.605V
* 001 = 1.695V
* 010 = 1.755V
* 011 = 1.8V (Initial)
* 100 = 1.845V
* 101 = 1.905V
* 110 = 1.95V
* 111 = 1.995V
*/
static const unsigned int bd718xx_3rd_nodvs_buck_volts[] = {
1605000, 1695000, 1755000, 1800000, 1845000, 1905000, 1950000, 1995000
};
/*
* BUCK8
* 0.8V to 1.40V (step 10mV)
*/
static const struct regulator_linear_range bd718xx_4th_nodvs_buck_volts[] = {
REGULATOR_LINEAR_RANGE(800000, 0x00, 0x3C, 10000),
};
/*
* LDO1
* 3.0 to 3.3V (100mV step)
*/
static const struct regulator_linear_range bd718xx_ldo1_volts[] = {
REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
REGULATOR_LINEAR_RANGE(1600000, 0x00, 0x03, 100000),
};
static const unsigned int bd718xx_ldo1_volt_range_sel[] = { 0x0, 0x20 };
/*
* LDO2
* 0.8 or 0.9V
*/
static const unsigned int ldo_2_volts[] = {
900000, 800000
};
/*
* LDO3
* 1.8 to 3.3V (100mV step)
*/
static const struct regulator_linear_range bd718xx_ldo3_volts[] = {
REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
};
/*
* LDO4
* 0.9 to 1.8V (100mV step)
*/
static const struct regulator_linear_range bd718xx_ldo4_volts[] = {
REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
};
/*
* LDO5 for BD71837
* 1.8 to 3.3V (100mV step)
*/
static const struct regulator_linear_range bd71837_ldo5_volts[] = {
REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
};
/*
* LDO5 for BD71837
* 1.8 to 3.3V (100mV step)
*/
static const struct regulator_linear_range bd71847_ldo5_volts[] = {
REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
REGULATOR_LINEAR_RANGE(800000, 0x00, 0x0F, 100000),
};
static const unsigned int bd71847_ldo5_volt_range_sel[] = { 0x0, 0x20 };
/*
* LDO6
* 0.9 to 1.8V (100mV step)
*/
static const struct regulator_linear_range bd718xx_ldo6_volts[] = {
REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
};
/*
* LDO7
* 1.8 to 3.3V (100mV step)
*/
static const struct regulator_linear_range bd71837_ldo7_volts[] = {
REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
};
struct reg_init {
unsigned int reg;
unsigned int mask;
unsigned int val;
};
struct bd718xx_regulator_data {
struct regulator_desc desc;
const struct reg_init init;
const struct reg_init *additional_inits;
int additional_init_amnt;
};
/*
* There is a HW quirk in BD71837. The shutdown sequence timings for
* bucks/LDOs which are controlled via register interface are changed.
* At PMIC poweroff the voltage for BUCK6/7 is cut immediately at the
* beginning of shut-down sequence. As bucks 6 and 7 are parent
* supplies for LDO5 and LDO6 - this causes LDO5/6 voltage
* monitoring to errorneously detect under voltage and force PMIC to
* emergency state instead of poweroff. In order to avoid this we
* disable voltage monitoring for LDO5 and LDO6
*/
static const struct reg_init bd71837_ldo5_inits[] = {
{
.reg = BD718XX_REG_MVRFLTMASK2,
.mask = BD718XX_LDO5_VRMON80,
.val = BD718XX_LDO5_VRMON80,
},
};
static const struct reg_init bd71837_ldo6_inits[] = {
{
.reg = BD718XX_REG_MVRFLTMASK2,
.mask = BD718XX_LDO6_VRMON80,
.val = BD718XX_LDO6_VRMON80,
},
};
static const struct bd718xx_regulator_data bd71847_regulators[] = {
{
.desc = {
.name = "buck1",
.of_match = of_match_ptr("BUCK1"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK1,
.ops = &bd718xx_dvs_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
.linear_ranges = bd718xx_dvs_buck_volts,
.n_linear_ranges =
ARRAY_SIZE(bd718xx_dvs_buck_volts),
.vsel_reg = BD718XX_REG_BUCK1_VOLT_RUN,
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD718XX_REG_BUCK1_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_BUCK1_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck2",
.of_match = of_match_ptr("BUCK2"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK2,
.ops = &bd718xx_dvs_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
.linear_ranges = bd718xx_dvs_buck_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
.vsel_reg = BD718XX_REG_BUCK2_VOLT_RUN,
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD718XX_REG_BUCK2_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_BUCK2_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck3",
.of_match = of_match_ptr("BUCK3"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK3,
.ops = &bd718xx_pickable_range_buck_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71847_BUCK3_VOLTAGE_NUM,
.linear_ranges = bd71847_buck3_volts,
.n_linear_ranges =
ARRAY_SIZE(bd71847_buck3_volts),
.vsel_reg = BD718XX_REG_1ST_NODVS_BUCK_VOLT,
.vsel_mask = BD718XX_1ST_NODVS_BUCK_MASK,
.vsel_range_reg = BD718XX_REG_1ST_NODVS_BUCK_VOLT,
.vsel_range_mask = BD71847_BUCK3_RANGE_MASK,
.linear_range_selectors = bd71847_buck3_volt_range_sel,
.enable_reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck4",
.of_match = of_match_ptr("BUCK4"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK4,
.ops = &bd718xx_pickable_range_buck_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71847_BUCK4_VOLTAGE_NUM,
.linear_ranges = bd71847_buck4_volts,
.n_linear_ranges =
ARRAY_SIZE(bd71847_buck4_volts),
.enable_reg = BD718XX_REG_2ND_NODVS_BUCK_CTRL,
.vsel_reg = BD718XX_REG_2ND_NODVS_BUCK_VOLT,
.vsel_mask = BD71847_BUCK4_MASK,
.vsel_range_reg = BD718XX_REG_2ND_NODVS_BUCK_VOLT,
.vsel_range_mask = BD71847_BUCK4_RANGE_MASK,
.linear_range_selectors = bd71847_buck4_volt_range_sel,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_2ND_NODVS_BUCK_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck5",
.of_match = of_match_ptr("BUCK5"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK5,
.ops = &bd718xx_buck_regulator_nolinear_ops,
.type = REGULATOR_VOLTAGE,
.volt_table = &bd718xx_3rd_nodvs_buck_volts[0],
.n_voltages = ARRAY_SIZE(bd718xx_3rd_nodvs_buck_volts),
.vsel_reg = BD718XX_REG_3RD_NODVS_BUCK_VOLT,
.vsel_mask = BD718XX_3RD_NODVS_BUCK_MASK,
.enable_reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck6",
.of_match = of_match_ptr("BUCK6"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK6,
.ops = &bd718xx_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_4TH_NODVS_BUCK_VOLTAGE_NUM,
.linear_ranges = bd718xx_4th_nodvs_buck_volts,
.n_linear_ranges =
ARRAY_SIZE(bd718xx_4th_nodvs_buck_volts),
.vsel_reg = BD718XX_REG_4TH_NODVS_BUCK_VOLT,
.vsel_mask = BD718XX_4TH_NODVS_BUCK_MASK,
.enable_reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "ldo1",
.of_match = of_match_ptr("LDO1"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO1,
.ops = &bd718xx_pickable_range_ldo_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_LDO1_VOLTAGE_NUM,
.linear_ranges = bd718xx_ldo1_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo1_volts),
.vsel_reg = BD718XX_REG_LDO1_VOLT,
.vsel_mask = BD718XX_LDO1_MASK,
.vsel_range_reg = BD718XX_REG_LDO1_VOLT,
.vsel_range_mask = BD718XX_LDO1_RANGE_MASK,
.linear_range_selectors = bd718xx_ldo1_volt_range_sel,
.enable_reg = BD718XX_REG_LDO1_VOLT,
.enable_mask = BD718XX_LDO_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO1_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo2",
.of_match = of_match_ptr("LDO2"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO2,
.ops = &bd718xx_ldo_regulator_nolinear_ops,
.type = REGULATOR_VOLTAGE,
.volt_table = &ldo_2_volts[0],
.vsel_reg = BD718XX_REG_LDO2_VOLT,
.vsel_mask = BD718XX_LDO2_MASK,
.n_voltages = ARRAY_SIZE(ldo_2_volts),
.enable_reg = BD718XX_REG_LDO2_VOLT,
.enable_mask = BD718XX_LDO_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO2_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo3",
.of_match = of_match_ptr("LDO3"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO3,
.ops = &bd718xx_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_LDO3_VOLTAGE_NUM,
.linear_ranges = bd718xx_ldo3_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo3_volts),
.vsel_reg = BD718XX_REG_LDO3_VOLT,
.vsel_mask = BD718XX_LDO3_MASK,
.enable_reg = BD718XX_REG_LDO3_VOLT,
.enable_mask = BD718XX_LDO_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO3_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo4",
.of_match = of_match_ptr("LDO4"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO4,
.ops = &bd718xx_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_LDO4_VOLTAGE_NUM,
.linear_ranges = bd718xx_ldo4_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo4_volts),
.vsel_reg = BD718XX_REG_LDO4_VOLT,
.vsel_mask = BD718XX_LDO4_MASK,
.enable_reg = BD718XX_REG_LDO4_VOLT,
.enable_mask = BD718XX_LDO_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO4_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo5",
.of_match = of_match_ptr("LDO5"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO5,
.ops = &bd718xx_pickable_range_ldo_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71847_LDO5_VOLTAGE_NUM,
.linear_ranges = bd71847_ldo5_volts,
.n_linear_ranges = ARRAY_SIZE(bd71847_ldo5_volts),
.vsel_reg = BD718XX_REG_LDO5_VOLT,
.vsel_mask = BD71847_LDO5_MASK,
.vsel_range_reg = BD718XX_REG_LDO5_VOLT,
.vsel_range_mask = BD71847_LDO5_RANGE_MASK,
.linear_range_selectors = bd71847_ldo5_volt_range_sel,
.enable_reg = BD718XX_REG_LDO5_VOLT,
.enable_mask = BD718XX_LDO_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO5_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo6",
.of_match = of_match_ptr("LDO6"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO6,
.ops = &bd718xx_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_LDO6_VOLTAGE_NUM,
.linear_ranges = bd718xx_ldo6_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo6_volts),
/* LDO6 is supplied by buck5 */
.supply_name = "buck5",
.vsel_reg = BD718XX_REG_LDO6_VOLT,
.vsel_mask = BD718XX_LDO6_MASK,
.enable_reg = BD718XX_REG_LDO6_VOLT,
.enable_mask = BD718XX_LDO_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO6_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
};
static const struct bd718xx_regulator_data bd71837_regulators[] = {
{
.desc = {
.name = "buck1",
.of_match = of_match_ptr("BUCK1"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK1,
.ops = &bd718xx_dvs_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
.linear_ranges = bd718xx_dvs_buck_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
.vsel_reg = BD718XX_REG_BUCK1_VOLT_RUN,
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD718XX_REG_BUCK1_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_BUCK1_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck2",
.of_match = of_match_ptr("BUCK2"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK2,
.ops = &bd718xx_dvs_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
.linear_ranges = bd718xx_dvs_buck_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
.vsel_reg = BD718XX_REG_BUCK2_VOLT_RUN,
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD718XX_REG_BUCK2_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_BUCK2_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck3",
.of_match = of_match_ptr("BUCK3"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK3,
.ops = &bd718xx_dvs_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
.linear_ranges = bd718xx_dvs_buck_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
.vsel_reg = BD71837_REG_BUCK3_VOLT_RUN,
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD71837_REG_BUCK3_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD71837_REG_BUCK3_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck4",
.of_match = of_match_ptr("BUCK4"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK4,
.ops = &bd718xx_dvs_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
.linear_ranges = bd718xx_dvs_buck_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
.vsel_reg = BD71837_REG_BUCK4_VOLT_RUN,
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD71837_REG_BUCK4_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD71837_REG_BUCK4_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck5",
.of_match = of_match_ptr("BUCK5"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK5,
.ops = &bd718xx_pickable_range_buck_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_BUCK5_VOLTAGE_NUM,
.linear_ranges = bd71837_buck5_volts,
.n_linear_ranges =
ARRAY_SIZE(bd71837_buck5_volts),
.vsel_reg = BD718XX_REG_1ST_NODVS_BUCK_VOLT,
.vsel_mask = BD71837_BUCK5_MASK,
.vsel_range_reg = BD718XX_REG_1ST_NODVS_BUCK_VOLT,
.vsel_range_mask = BD71837_BUCK5_RANGE_MASK,
.linear_range_selectors = bd71837_buck5_volt_range_sel,
.enable_reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck6",
.of_match = of_match_ptr("BUCK6"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK6,
.ops = &bd718xx_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_BUCK6_VOLTAGE_NUM,
.linear_ranges = bd71837_buck6_volts,
.n_linear_ranges =
ARRAY_SIZE(bd71837_buck6_volts),
.vsel_reg = BD718XX_REG_2ND_NODVS_BUCK_VOLT,
.vsel_mask = BD71837_BUCK6_MASK,
.enable_reg = BD718XX_REG_2ND_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_2ND_NODVS_BUCK_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck7",
.of_match = of_match_ptr("BUCK7"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK7,
.ops = &bd718xx_buck_regulator_nolinear_ops,
.type = REGULATOR_VOLTAGE,
.volt_table = &bd718xx_3rd_nodvs_buck_volts[0],
.n_voltages = ARRAY_SIZE(bd718xx_3rd_nodvs_buck_volts),
.vsel_reg = BD718XX_REG_3RD_NODVS_BUCK_VOLT,
.vsel_mask = BD718XX_3RD_NODVS_BUCK_MASK,
.enable_reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck8",
.of_match = of_match_ptr("BUCK8"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK8,
.ops = &bd718xx_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_4TH_NODVS_BUCK_VOLTAGE_NUM,
.linear_ranges = bd718xx_4th_nodvs_buck_volts,
.n_linear_ranges =
ARRAY_SIZE(bd718xx_4th_nodvs_buck_volts),
.vsel_reg = BD718XX_REG_4TH_NODVS_BUCK_VOLT,
.vsel_mask = BD718XX_4TH_NODVS_BUCK_MASK,
.enable_reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "ldo1",
.of_match = of_match_ptr("LDO1"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO1,
.ops = &bd718xx_pickable_range_ldo_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_LDO1_VOLTAGE_NUM,
.linear_ranges = bd718xx_ldo1_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo1_volts),
.vsel_reg = BD718XX_REG_LDO1_VOLT,
.vsel_mask = BD718XX_LDO1_MASK,
.vsel_range_reg = BD718XX_REG_LDO1_VOLT,
.vsel_range_mask = BD718XX_LDO1_RANGE_MASK,
.linear_range_selectors = bd718xx_ldo1_volt_range_sel,
.enable_reg = BD718XX_REG_LDO1_VOLT,
.enable_mask = BD718XX_LDO_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO1_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo2",
.of_match = of_match_ptr("LDO2"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO2,
.ops = &bd718xx_ldo_regulator_nolinear_ops,
.type = REGULATOR_VOLTAGE,
.volt_table = &ldo_2_volts[0],
.vsel_reg = BD718XX_REG_LDO2_VOLT,
.vsel_mask = BD718XX_LDO2_MASK,
.n_voltages = ARRAY_SIZE(ldo_2_volts),
.enable_reg = BD718XX_REG_LDO2_VOLT,
.enable_mask = BD718XX_LDO_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO2_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo3",
.of_match = of_match_ptr("LDO3"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO3,
.ops = &bd718xx_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_LDO3_VOLTAGE_NUM,
.linear_ranges = bd718xx_ldo3_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo3_volts),
.vsel_reg = BD718XX_REG_LDO3_VOLT,
.vsel_mask = BD718XX_LDO3_MASK,
.enable_reg = BD718XX_REG_LDO3_VOLT,
.enable_mask = BD718XX_LDO_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO3_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo4",
.of_match = of_match_ptr("LDO4"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO4,
.ops = &bd718xx_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_LDO4_VOLTAGE_NUM,
.linear_ranges = bd718xx_ldo4_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo4_volts),
.vsel_reg = BD718XX_REG_LDO4_VOLT,
.vsel_mask = BD718XX_LDO4_MASK,
.enable_reg = BD718XX_REG_LDO4_VOLT,
.enable_mask = BD718XX_LDO_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO4_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo5",
.of_match = of_match_ptr("LDO5"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO5,
.ops = &bd718xx_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_LDO5_VOLTAGE_NUM,
.linear_ranges = bd71837_ldo5_volts,
.n_linear_ranges = ARRAY_SIZE(bd71837_ldo5_volts),
/* LDO5 is supplied by buck6 */
.supply_name = "buck6",
.vsel_reg = BD718XX_REG_LDO5_VOLT,
.vsel_mask = BD71837_LDO5_MASK,
.enable_reg = BD718XX_REG_LDO5_VOLT,
.enable_mask = BD718XX_LDO_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO5_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
.additional_inits = bd71837_ldo5_inits,
.additional_init_amnt = ARRAY_SIZE(bd71837_ldo5_inits),
},
{
.desc = {
.name = "ldo6",
.of_match = of_match_ptr("LDO6"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO6,
.ops = &bd718xx_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_LDO6_VOLTAGE_NUM,
.linear_ranges = bd718xx_ldo6_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo6_volts),
/* LDO6 is supplied by buck7 */
.supply_name = "buck7",
.vsel_reg = BD718XX_REG_LDO6_VOLT,
.vsel_mask = BD718XX_LDO6_MASK,
.enable_reg = BD718XX_REG_LDO6_VOLT,
.enable_mask = BD718XX_LDO_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO6_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
.additional_inits = bd71837_ldo6_inits,
.additional_init_amnt = ARRAY_SIZE(bd71837_ldo6_inits),
},
{
.desc = {
.name = "ldo7",
.of_match = of_match_ptr("LDO7"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO7,
.ops = &bd718xx_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_LDO7_VOLTAGE_NUM,
.linear_ranges = bd71837_ldo7_volts,
.n_linear_ranges = ARRAY_SIZE(bd71837_ldo7_volts),
.vsel_reg = BD71837_REG_LDO7_VOLT,
.vsel_mask = BD71837_LDO7_MASK,
.enable_reg = BD71837_REG_LDO7_VOLT,
.enable_mask = BD718XX_LDO_EN,
.owner = THIS_MODULE,
},
.init = {
.reg = BD71837_REG_LDO7_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
};
struct bd718xx_pmic_inits {
const struct bd718xx_regulator_data *r_datas;
unsigned int r_amount;
};
static int bd718xx_probe(struct platform_device *pdev)
{
struct bd718xx *mfd;
struct regulator_config config = { 0 };
struct bd718xx_pmic_inits pmic_regulators[] = {
[BD718XX_TYPE_BD71837] = {
.r_datas = bd71837_regulators,
.r_amount = ARRAY_SIZE(bd71837_regulators),
},
[BD718XX_TYPE_BD71847] = {
.r_datas = bd71847_regulators,
.r_amount = ARRAY_SIZE(bd71847_regulators),
},
};
int i, j, err;
mfd = dev_get_drvdata(pdev->dev.parent);
if (!mfd) {
dev_err(&pdev->dev, "No MFD driver data\n");
err = -EINVAL;
goto err;
}
if (mfd->chip_type >= BD718XX_TYPE_AMOUNT ||
!pmic_regulators[mfd->chip_type].r_datas) {
dev_err(&pdev->dev, "Unsupported chip type\n");
err = -EINVAL;
goto err;
}
/* Register LOCK release */
err = regmap_update_bits(mfd->regmap, BD718XX_REG_REGLOCK,
(REGLOCK_PWRSEQ | REGLOCK_VREG), 0);
if (err) {
dev_err(&pdev->dev, "Failed to unlock PMIC (%d)\n", err);
goto err;
} else {
dev_dbg(&pdev->dev, "Unlocked lock register 0x%x\n",
BD718XX_REG_REGLOCK);
}
/* At poweroff transition PMIC HW disables EN bit for regulators but
* leaves SEL bit untouched. So if state transition from POWEROFF
* is done to SNVS - then all power rails controlled by SW (having
* SEL bit set) stay disabled as EN is cleared. This may result boot
* failure if any crucial systems are powered by these rails.
*
* Change the next stage from poweroff to be READY instead of SNVS
* for all reset types because OTP loading at READY will clear SEL
* bit allowing HW defaults for power rails to be used
*/
err = regmap_update_bits(mfd->regmap, BD718XX_REG_TRANS_COND1,
BD718XX_ON_REQ_POWEROFF_MASK |
BD718XX_SWRESET_POWEROFF_MASK |
BD718XX_WDOG_POWEROFF_MASK |
BD718XX_KEY_L_POWEROFF_MASK,
BD718XX_POWOFF_TO_RDY);
if (err) {
dev_err(&pdev->dev, "Failed to change reset target\n");
goto err;
} else {
dev_dbg(&pdev->dev, "Changed all resets from SVNS to READY\n");
}
for (i = 0; i < pmic_regulators[mfd->chip_type].r_amount; i++) {
const struct regulator_desc *desc;
struct regulator_dev *rdev;
const struct bd718xx_regulator_data *r;
r = &pmic_regulators[mfd->chip_type].r_datas[i];
desc = &r->desc;
config.dev = pdev->dev.parent;
config.regmap = mfd->regmap;
rdev = devm_regulator_register(&pdev->dev, desc, &config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev,
"failed to register %s regulator\n",
desc->name);
err = PTR_ERR(rdev);
goto err;
}
/* Regulator register gets the regulator constraints and
* applies them (set_machine_constraints). This should have
* turned the control register(s) to correct values and we
* can now switch the control from PMIC state machine to the
* register interface
*/
err = regmap_update_bits(mfd->regmap, r->init.reg,
r->init.mask, r->init.val);
if (err) {
dev_err(&pdev->dev,
"Failed to write BUCK/LDO SEL bit for (%s)\n",
desc->name);
goto err;
}
for (j = 0; j < r->additional_init_amnt; j++) {
err = regmap_update_bits(mfd->regmap,
r->additional_inits[j].reg,
r->additional_inits[j].mask,
r->additional_inits[j].val);
if (err) {
dev_err(&pdev->dev,
"Buck (%s) initialization failed\n",
desc->name);
goto err;
}
}
}
err:
return err;
}
static struct platform_driver bd718xx_regulator = {
.driver = {
.name = "bd718xx-pmic",
},
.probe = bd718xx_probe,
};
module_platform_driver(bd718xx_regulator);
MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
MODULE_DESCRIPTION("BD71837/BD71847 voltage regulator driver");
MODULE_LICENSE("GPL");
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