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linux/drivers/regulator/pfuze100-regulator.c
Marco Felsch 9d2fd4f0dd
regulator: pfuze100: add support to en-/disable switch regulators 
Add enable/disable support for switch regulators on pfuze100.

Based on commit 5fe156f1ca ("regulator: pfuze100: add enable/disable for
switch") which is reverted due to boot regressions by commit 464a5686e6
("regulator: Revert "regulator: pfuze100: add enable/disable for switch"").
Disabling the switch regulators will only be done if the user specifies
"fsl,pfuze-support-disable-sw" in its device tree to keep backward
compatibility with current dtb's [1].

[1] https://patchwork.kernel.org/patch/10490381/

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-07-23 20:09:31 +01:00

772 lines
23 KiB
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// SPDX-License-Identifier: GPL-2.0+
//
// Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regulator/of_regulator.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/pfuze100.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/regmap.h>
#define PFUZE_FLAG_DISABLE_SW BIT(1)
#define PFUZE_NUMREGS 128
#define PFUZE100_VOL_OFFSET 0
#define PFUZE100_STANDBY_OFFSET 1
#define PFUZE100_MODE_OFFSET 3
#define PFUZE100_CONF_OFFSET 4
#define PFUZE100_DEVICEID 0x0
#define PFUZE100_REVID 0x3
#define PFUZE100_FABID 0x4
#define PFUZE100_COINVOL 0x1a
#define PFUZE100_SW1ABVOL 0x20
#define PFUZE100_SW1CVOL 0x2e
#define PFUZE100_SW2VOL 0x35
#define PFUZE100_SW3AVOL 0x3c
#define PFUZE100_SW3BVOL 0x43
#define PFUZE100_SW4VOL 0x4a
#define PFUZE100_SWBSTCON1 0x66
#define PFUZE100_VREFDDRCON 0x6a
#define PFUZE100_VSNVSVOL 0x6b
#define PFUZE100_VGEN1VOL 0x6c
#define PFUZE100_VGEN2VOL 0x6d
#define PFUZE100_VGEN3VOL 0x6e
#define PFUZE100_VGEN4VOL 0x6f
#define PFUZE100_VGEN5VOL 0x70
#define PFUZE100_VGEN6VOL 0x71
enum chips { PFUZE100, PFUZE200, PFUZE3000 = 3, PFUZE3001 = 0x31, };
struct pfuze_regulator {
struct regulator_desc desc;
unsigned char stby_reg;
unsigned char stby_mask;
bool sw_reg;
};
struct pfuze_chip {
int chip_id;
int flags;
struct regmap *regmap;
struct device *dev;
struct pfuze_regulator regulator_descs[PFUZE100_MAX_REGULATOR];
struct regulator_dev *regulators[PFUZE100_MAX_REGULATOR];
struct pfuze_regulator *pfuze_regulators;
};
static const int pfuze100_swbst[] = {
5000000, 5050000, 5100000, 5150000,
};
static const int pfuze100_vsnvs[] = {
1000000, 1100000, 1200000, 1300000, 1500000, 1800000, 3000000,
};
static const int pfuze100_coin[] = {
2500000, 2700000, 2800000, 2900000, 3000000, 3100000, 3200000, 3300000,
};
static const int pfuze3000_sw1a[] = {
700000, 725000, 750000, 775000, 800000, 825000, 850000, 875000,
900000, 925000, 950000, 975000, 1000000, 1025000, 1050000, 1075000,
1100000, 1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000,
1300000, 1325000, 1350000, 1375000, 1400000, 1425000, 1800000, 3300000,
};
static const int pfuze3000_sw2lo[] = {
1500000, 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000,
};
static const int pfuze3000_sw2hi[] = {
2500000, 2800000, 2850000, 3000000, 3100000, 3150000, 3200000, 3300000,
};
static const struct i2c_device_id pfuze_device_id[] = {
{.name = "pfuze100", .driver_data = PFUZE100},
{.name = "pfuze200", .driver_data = PFUZE200},
{.name = "pfuze3000", .driver_data = PFUZE3000},
{.name = "pfuze3001", .driver_data = PFUZE3001},
{ }
};
MODULE_DEVICE_TABLE(i2c, pfuze_device_id);
static const struct of_device_id pfuze_dt_ids[] = {
{ .compatible = "fsl,pfuze100", .data = (void *)PFUZE100},
{ .compatible = "fsl,pfuze200", .data = (void *)PFUZE200},
{ .compatible = "fsl,pfuze3000", .data = (void *)PFUZE3000},
{ .compatible = "fsl,pfuze3001", .data = (void *)PFUZE3001},
{ }
};
MODULE_DEVICE_TABLE(of, pfuze_dt_ids);
static int pfuze100_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
{
struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
bool reg_has_ramp_delay;
unsigned int ramp_bits;
int ret;
switch (pfuze100->chip_id) {
case PFUZE3001:
/* no dynamic voltage scaling for PF3001 */
reg_has_ramp_delay = false;
break;
case PFUZE3000:
reg_has_ramp_delay = (id < PFUZE3000_SWBST);
break;
case PFUZE200:
reg_has_ramp_delay = (id < PFUZE200_SWBST);
break;
case PFUZE100:
default:
reg_has_ramp_delay = (id < PFUZE100_SWBST);
break;
}
if (reg_has_ramp_delay) {
ramp_delay = 12500 / ramp_delay;
ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3);
ret = regmap_update_bits(pfuze100->regmap,
rdev->desc->vsel_reg + 4,
0xc0, ramp_bits << 6);
if (ret < 0)
dev_err(pfuze100->dev, "ramp failed, err %d\n", ret);
} else {
ret = -EACCES;
}
return ret;
}
static const struct regulator_ops pfuze100_ldo_regulator_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_linear,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
};
static const struct regulator_ops pfuze100_fixed_regulator_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_linear,
};
static const struct regulator_ops pfuze100_sw_regulator_ops = {
.list_voltage = regulator_list_voltage_linear,
.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 = pfuze100_set_ramp_delay,
};
static const struct regulator_ops pfuze100_sw_disable_regulator_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_linear,
.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 = pfuze100_set_ramp_delay,
};
static const struct regulator_ops pfuze100_swb_regulator_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 = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
};
#define PFUZE100_FIXED_REG(_chip, _name, base, voltage) \
[_chip ## _ ## _name] = { \
.desc = { \
.name = #_name, \
.n_voltages = 1, \
.ops = &pfuze100_fixed_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.id = _chip ## _ ## _name, \
.owner = THIS_MODULE, \
.min_uV = (voltage), \
.enable_reg = (base), \
.enable_mask = 0x10, \
}, \
}
#define PFUZE100_SW_REG(_chip, _name, base, min, max, step) \
[_chip ## _ ## _name] = { \
.desc = { \
.name = #_name,\
.n_voltages = ((max) - (min)) / (step) + 1, \
.ops = &pfuze100_sw_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.id = _chip ## _ ## _name, \
.owner = THIS_MODULE, \
.min_uV = (min), \
.uV_step = (step), \
.vsel_reg = (base) + PFUZE100_VOL_OFFSET, \
.vsel_mask = 0x3f, \
.enable_reg = (base) + PFUZE100_MODE_OFFSET, \
.enable_mask = 0xf, \
}, \
.stby_reg = (base) + PFUZE100_STANDBY_OFFSET, \
.stby_mask = 0x3f, \
.sw_reg = true, \
}
#define PFUZE100_SWB_REG(_chip, _name, base, mask, voltages) \
[_chip ## _ ## _name] = { \
.desc = { \
.name = #_name, \
.n_voltages = ARRAY_SIZE(voltages), \
.ops = &pfuze100_swb_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.id = _chip ## _ ## _name, \
.owner = THIS_MODULE, \
.volt_table = voltages, \
.vsel_reg = (base), \
.vsel_mask = (mask), \
.enable_reg = (base), \
.enable_mask = 0x48, \
}, \
}
#define PFUZE100_VGEN_REG(_chip, _name, base, min, max, step) \
[_chip ## _ ## _name] = { \
.desc = { \
.name = #_name, \
.n_voltages = ((max) - (min)) / (step) + 1, \
.ops = &pfuze100_ldo_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.id = _chip ## _ ## _name, \
.owner = THIS_MODULE, \
.min_uV = (min), \
.uV_step = (step), \
.vsel_reg = (base), \
.vsel_mask = 0xf, \
.enable_reg = (base), \
.enable_mask = 0x10, \
}, \
.stby_reg = (base), \
.stby_mask = 0x20, \
}
#define PFUZE100_COIN_REG(_chip, _name, base, mask, voltages) \
[_chip ## _ ## _name] = { \
.desc = { \
.name = #_name, \
.n_voltages = ARRAY_SIZE(voltages), \
.ops = &pfuze100_swb_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.id = _chip ## _ ## _name, \
.owner = THIS_MODULE, \
.volt_table = voltages, \
.vsel_reg = (base), \
.vsel_mask = (mask), \
.enable_reg = (base), \
.enable_mask = 0x8, \
}, \
}
#define PFUZE3000_VCC_REG(_chip, _name, base, min, max, step) { \
.desc = { \
.name = #_name, \
.n_voltages = ((max) - (min)) / (step) + 1, \
.ops = &pfuze100_ldo_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.id = _chip ## _ ## _name, \
.owner = THIS_MODULE, \
.min_uV = (min), \
.uV_step = (step), \
.vsel_reg = (base), \
.vsel_mask = 0x3, \
.enable_reg = (base), \
.enable_mask = 0x10, \
}, \
.stby_reg = (base), \
.stby_mask = 0x20, \
}
#define PFUZE3000_SW2_REG(_chip, _name, base, min, max, step) { \
.desc = { \
.name = #_name,\
.n_voltages = ((max) - (min)) / (step) + 1, \
.ops = &pfuze100_sw_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.id = _chip ## _ ## _name, \
.owner = THIS_MODULE, \
.min_uV = (min), \
.uV_step = (step), \
.vsel_reg = (base) + PFUZE100_VOL_OFFSET, \
.vsel_mask = 0x7, \
}, \
.stby_reg = (base) + PFUZE100_STANDBY_OFFSET, \
.stby_mask = 0x7, \
}
#define PFUZE3000_SW3_REG(_chip, _name, base, min, max, step) { \
.desc = { \
.name = #_name,\
.n_voltages = ((max) - (min)) / (step) + 1, \
.ops = &pfuze100_sw_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.id = _chip ## _ ## _name, \
.owner = THIS_MODULE, \
.min_uV = (min), \
.uV_step = (step), \
.vsel_reg = (base) + PFUZE100_VOL_OFFSET, \
.vsel_mask = 0xf, \
}, \
.stby_reg = (base) + PFUZE100_STANDBY_OFFSET, \
.stby_mask = 0xf, \
}
/* PFUZE100 */
static struct pfuze_regulator pfuze100_regulators[] = {
PFUZE100_SW_REG(PFUZE100, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
PFUZE100_SW_REG(PFUZE100, SW1C, PFUZE100_SW1CVOL, 300000, 1875000, 25000),
PFUZE100_SW_REG(PFUZE100, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
PFUZE100_SW_REG(PFUZE100, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
PFUZE100_SW_REG(PFUZE100, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
PFUZE100_SW_REG(PFUZE100, SW4, PFUZE100_SW4VOL, 400000, 1975000, 25000),
PFUZE100_SWB_REG(PFUZE100, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
PFUZE100_SWB_REG(PFUZE100, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
PFUZE100_FIXED_REG(PFUZE100, VREFDDR, PFUZE100_VREFDDRCON, 750000),
PFUZE100_VGEN_REG(PFUZE100, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
PFUZE100_VGEN_REG(PFUZE100, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
PFUZE100_VGEN_REG(PFUZE100, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
PFUZE100_VGEN_REG(PFUZE100, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
PFUZE100_VGEN_REG(PFUZE100, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
PFUZE100_VGEN_REG(PFUZE100, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
};
static struct pfuze_regulator pfuze200_regulators[] = {
PFUZE100_SW_REG(PFUZE200, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
PFUZE100_SW_REG(PFUZE200, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
PFUZE100_SW_REG(PFUZE200, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
PFUZE100_SW_REG(PFUZE200, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
PFUZE100_SWB_REG(PFUZE200, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
PFUZE100_SWB_REG(PFUZE200, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
PFUZE100_FIXED_REG(PFUZE200, VREFDDR, PFUZE100_VREFDDRCON, 750000),
PFUZE100_VGEN_REG(PFUZE200, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
PFUZE100_VGEN_REG(PFUZE200, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
PFUZE100_VGEN_REG(PFUZE200, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
PFUZE100_VGEN_REG(PFUZE200, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
PFUZE100_VGEN_REG(PFUZE200, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
PFUZE100_VGEN_REG(PFUZE200, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
PFUZE100_COIN_REG(PFUZE200, COIN, PFUZE100_COINVOL, 0x7, pfuze100_coin),
};
static struct pfuze_regulator pfuze3000_regulators[] = {
PFUZE100_SWB_REG(PFUZE3000, SW1A, PFUZE100_SW1ABVOL, 0x1f, pfuze3000_sw1a),
PFUZE100_SW_REG(PFUZE3000, SW1B, PFUZE100_SW1CVOL, 700000, 1475000, 25000),
PFUZE100_SWB_REG(PFUZE3000, SW2, PFUZE100_SW2VOL, 0x7, pfuze3000_sw2lo),
PFUZE3000_SW3_REG(PFUZE3000, SW3, PFUZE100_SW3AVOL, 900000, 1650000, 50000),
PFUZE100_SWB_REG(PFUZE3000, SWBST, PFUZE100_SWBSTCON1, 0x3, pfuze100_swbst),
PFUZE100_SWB_REG(PFUZE3000, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
PFUZE100_FIXED_REG(PFUZE3000, VREFDDR, PFUZE100_VREFDDRCON, 750000),
PFUZE100_VGEN_REG(PFUZE3000, VLDO1, PFUZE100_VGEN1VOL, 1800000, 3300000, 100000),
PFUZE100_VGEN_REG(PFUZE3000, VLDO2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
PFUZE3000_VCC_REG(PFUZE3000, VCCSD, PFUZE100_VGEN3VOL, 2850000, 3300000, 150000),
PFUZE3000_VCC_REG(PFUZE3000, V33, PFUZE100_VGEN4VOL, 2850000, 3300000, 150000),
PFUZE100_VGEN_REG(PFUZE3000, VLDO3, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
PFUZE100_VGEN_REG(PFUZE3000, VLDO4, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
};
static struct pfuze_regulator pfuze3001_regulators[] = {
PFUZE100_SWB_REG(PFUZE3001, SW1, PFUZE100_SW1ABVOL, 0x1f, pfuze3000_sw1a),
PFUZE100_SWB_REG(PFUZE3001, SW2, PFUZE100_SW2VOL, 0x7, pfuze3000_sw2lo),
PFUZE3000_SW3_REG(PFUZE3001, SW3, PFUZE100_SW3AVOL, 900000, 1650000, 50000),
PFUZE100_SWB_REG(PFUZE3001, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
PFUZE100_VGEN_REG(PFUZE3001, VLDO1, PFUZE100_VGEN1VOL, 1800000, 3300000, 100000),
PFUZE100_VGEN_REG(PFUZE3001, VLDO2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
PFUZE3000_VCC_REG(PFUZE3001, VCCSD, PFUZE100_VGEN3VOL, 2850000, 3300000, 150000),
PFUZE3000_VCC_REG(PFUZE3001, V33, PFUZE100_VGEN4VOL, 2850000, 3300000, 150000),
PFUZE100_VGEN_REG(PFUZE3001, VLDO3, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
PFUZE100_VGEN_REG(PFUZE3001, VLDO4, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
};
#ifdef CONFIG_OF
/* PFUZE100 */
static struct of_regulator_match pfuze100_matches[] = {
{ .name = "sw1ab", },
{ .name = "sw1c", },
{ .name = "sw2", },
{ .name = "sw3a", },
{ .name = "sw3b", },
{ .name = "sw4", },
{ .name = "swbst", },
{ .name = "vsnvs", },
{ .name = "vrefddr", },
{ .name = "vgen1", },
{ .name = "vgen2", },
{ .name = "vgen3", },
{ .name = "vgen4", },
{ .name = "vgen5", },
{ .name = "vgen6", },
};
/* PFUZE200 */
static struct of_regulator_match pfuze200_matches[] = {
{ .name = "sw1ab", },
{ .name = "sw2", },
{ .name = "sw3a", },
{ .name = "sw3b", },
{ .name = "swbst", },
{ .name = "vsnvs", },
{ .name = "vrefddr", },
{ .name = "vgen1", },
{ .name = "vgen2", },
{ .name = "vgen3", },
{ .name = "vgen4", },
{ .name = "vgen5", },
{ .name = "vgen6", },
{ .name = "coin", },
};
/* PFUZE3000 */
static struct of_regulator_match pfuze3000_matches[] = {
{ .name = "sw1a", },
{ .name = "sw1b", },
{ .name = "sw2", },
{ .name = "sw3", },
{ .name = "swbst", },
{ .name = "vsnvs", },
{ .name = "vrefddr", },
{ .name = "vldo1", },
{ .name = "vldo2", },
{ .name = "vccsd", },
{ .name = "v33", },
{ .name = "vldo3", },
{ .name = "vldo4", },
};
/* PFUZE3001 */
static struct of_regulator_match pfuze3001_matches[] = {
{ .name = "sw1", },
{ .name = "sw2", },
{ .name = "sw3", },
{ .name = "vsnvs", },
{ .name = "vldo1", },
{ .name = "vldo2", },
{ .name = "vccsd", },
{ .name = "v33", },
{ .name = "vldo3", },
{ .name = "vldo4", },
};
static struct of_regulator_match *pfuze_matches;
static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
{
struct device *dev = chip->dev;
struct device_node *np, *parent;
int ret;
np = of_node_get(dev->of_node);
if (!np)
return -EINVAL;
if (of_property_read_bool(np, "fsl,pfuze-support-disable-sw"))
chip->flags |= PFUZE_FLAG_DISABLE_SW;
parent = of_get_child_by_name(np, "regulators");
if (!parent) {
dev_err(dev, "regulators node not found\n");
return -EINVAL;
}
switch (chip->chip_id) {
case PFUZE3001:
pfuze_matches = pfuze3001_matches;
ret = of_regulator_match(dev, parent, pfuze3001_matches,
ARRAY_SIZE(pfuze3001_matches));
break;
case PFUZE3000:
pfuze_matches = pfuze3000_matches;
ret = of_regulator_match(dev, parent, pfuze3000_matches,
ARRAY_SIZE(pfuze3000_matches));
break;
case PFUZE200:
pfuze_matches = pfuze200_matches;
ret = of_regulator_match(dev, parent, pfuze200_matches,
ARRAY_SIZE(pfuze200_matches));
break;
case PFUZE100:
default:
pfuze_matches = pfuze100_matches;
ret = of_regulator_match(dev, parent, pfuze100_matches,
ARRAY_SIZE(pfuze100_matches));
break;
}
of_node_put(parent);
if (ret < 0) {
dev_err(dev, "Error parsing regulator init data: %d\n",
ret);
return ret;
}
return 0;
}
static inline struct regulator_init_data *match_init_data(int index)
{
return pfuze_matches[index].init_data;
}
static inline struct device_node *match_of_node(int index)
{
return pfuze_matches[index].of_node;
}
#else
static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
{
return 0;
}
static inline struct regulator_init_data *match_init_data(int index)
{
return NULL;
}
static inline struct device_node *match_of_node(int index)
{
return NULL;
}
#endif
static int pfuze_identify(struct pfuze_chip *pfuze_chip)
{
unsigned int value;
int ret;
ret = regmap_read(pfuze_chip->regmap, PFUZE100_DEVICEID, &value);
if (ret)
return ret;
if (((value & 0x0f) == 0x8) && (pfuze_chip->chip_id == PFUZE100)) {
/*
* Freescale misprogrammed 1-3% of parts prior to week 8 of 2013
* as ID=8 in PFUZE100
*/
dev_info(pfuze_chip->dev, "Assuming misprogrammed ID=0x8");
} else if ((value & 0x0f) != pfuze_chip->chip_id &&
(value & 0xf0) >> 4 != pfuze_chip->chip_id &&
(value != pfuze_chip->chip_id)) {
/* device id NOT match with your setting */
dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
return -ENODEV;
}
ret = regmap_read(pfuze_chip->regmap, PFUZE100_REVID, &value);
if (ret)
return ret;
dev_info(pfuze_chip->dev,
"Full layer: %x, Metal layer: %x\n",
(value & 0xf0) >> 4, value & 0x0f);
ret = regmap_read(pfuze_chip->regmap, PFUZE100_FABID, &value);
if (ret)
return ret;
dev_info(pfuze_chip->dev, "FAB: %x, FIN: %x\n",
(value & 0xc) >> 2, value & 0x3);
return 0;
}
static const struct regmap_config pfuze_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = PFUZE_NUMREGS - 1,
.cache_type = REGCACHE_RBTREE,
};
static int pfuze100_regulator_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct pfuze_chip *pfuze_chip;
struct pfuze_regulator_platform_data *pdata =
dev_get_platdata(&client->dev);
struct regulator_config config = { };
int i, ret;
const struct of_device_id *match;
u32 regulator_num;
u32 sw_check_start, sw_check_end, sw_hi = 0x40;
pfuze_chip = devm_kzalloc(&client->dev, sizeof(*pfuze_chip),
GFP_KERNEL);
if (!pfuze_chip)
return -ENOMEM;
if (client->dev.of_node) {
match = of_match_device(of_match_ptr(pfuze_dt_ids),
&client->dev);
if (!match) {
dev_err(&client->dev, "Error: No device match found\n");
return -ENODEV;
}
pfuze_chip->chip_id = (int)(long)match->data;
} else if (id) {
pfuze_chip->chip_id = id->driver_data;
} else {
dev_err(&client->dev, "No dts match or id table match found\n");
return -ENODEV;
}
i2c_set_clientdata(client, pfuze_chip);
pfuze_chip->dev = &client->dev;
pfuze_chip->regmap = devm_regmap_init_i2c(client, &pfuze_regmap_config);
if (IS_ERR(pfuze_chip->regmap)) {
ret = PTR_ERR(pfuze_chip->regmap);
dev_err(&client->dev,
"regmap allocation failed with err %d\n", ret);
return ret;
}
ret = pfuze_identify(pfuze_chip);
if (ret) {
dev_err(&client->dev, "unrecognized pfuze chip ID!\n");
return ret;
}
/* use the right regulators after identify the right device */
switch (pfuze_chip->chip_id) {
case PFUZE3001:
pfuze_chip->pfuze_regulators = pfuze3001_regulators;
regulator_num = ARRAY_SIZE(pfuze3001_regulators);
sw_check_start = PFUZE3001_SW2;
sw_check_end = PFUZE3001_SW2;
sw_hi = 1 << 3;
break;
case PFUZE3000:
pfuze_chip->pfuze_regulators = pfuze3000_regulators;
regulator_num = ARRAY_SIZE(pfuze3000_regulators);
sw_check_start = PFUZE3000_SW2;
sw_check_end = PFUZE3000_SW2;
sw_hi = 1 << 3;
break;
case PFUZE200:
pfuze_chip->pfuze_regulators = pfuze200_regulators;
regulator_num = ARRAY_SIZE(pfuze200_regulators);
sw_check_start = PFUZE200_SW2;
sw_check_end = PFUZE200_SW3B;
break;
case PFUZE100:
default:
pfuze_chip->pfuze_regulators = pfuze100_regulators;
regulator_num = ARRAY_SIZE(pfuze100_regulators);
sw_check_start = PFUZE100_SW2;
sw_check_end = PFUZE100_SW4;
break;
}
dev_info(&client->dev, "pfuze%s found.\n",
(pfuze_chip->chip_id == PFUZE100) ? "100" :
(((pfuze_chip->chip_id == PFUZE200) ? "200" :
((pfuze_chip->chip_id == PFUZE3000) ? "3000" : "3001"))));
memcpy(pfuze_chip->regulator_descs, pfuze_chip->pfuze_regulators,
sizeof(pfuze_chip->regulator_descs));
ret = pfuze_parse_regulators_dt(pfuze_chip);
if (ret)
return ret;
for (i = 0; i < regulator_num; i++) {
struct regulator_init_data *init_data;
struct regulator_desc *desc;
int val;
desc = &pfuze_chip->regulator_descs[i].desc;
if (pdata)
init_data = pdata->init_data[i];
else
init_data = match_init_data(i);
/* SW2~SW4 high bit check and modify the voltage value table */
if (i >= sw_check_start && i <= sw_check_end) {
regmap_read(pfuze_chip->regmap, desc->vsel_reg, &val);
if (val & sw_hi) {
if (pfuze_chip->chip_id == PFUZE3000 ||
pfuze_chip->chip_id == PFUZE3001) {
desc->volt_table = pfuze3000_sw2hi;
desc->n_voltages = ARRAY_SIZE(pfuze3000_sw2hi);
} else {
desc->min_uV = 800000;
desc->uV_step = 50000;
desc->n_voltages = 51;
}
}
}
/*
* Allow SW regulators to turn off. Checking it trough a flag is
* a workaround to keep the backward compatibility with existing
* old dtb's which may relay on the fact that we didn't disable
* the switched regulator till yet.
*/
if (pfuze_chip->flags & PFUZE_FLAG_DISABLE_SW) {
if (pfuze_chip->regulator_descs[i].sw_reg) {
desc->ops = &pfuze100_sw_disable_regulator_ops;
desc->enable_val = 0x8;
desc->disable_val = 0x0;
desc->enable_time = 500;
}
}
config.dev = &client->dev;
config.init_data = init_data;
config.driver_data = pfuze_chip;
config.of_node = match_of_node(i);
pfuze_chip->regulators[i] =
devm_regulator_register(&client->dev, desc, &config);
if (IS_ERR(pfuze_chip->regulators[i])) {
dev_err(&client->dev, "register regulator%s failed\n",
pfuze_chip->pfuze_regulators[i].desc.name);
return PTR_ERR(pfuze_chip->regulators[i]);
}
}
return 0;
}
static struct i2c_driver pfuze_driver = {
.id_table = pfuze_device_id,
.driver = {
.name = "pfuze100-regulator",
.of_match_table = pfuze_dt_ids,
},
.probe = pfuze100_regulator_probe,
};
module_i2c_driver(pfuze_driver);
MODULE_AUTHOR("Robin Gong <b38343@freescale.com>");
MODULE_DESCRIPTION("Regulator Driver for Freescale PFUZE100/200/3000/3001 PMIC");
MODULE_LICENSE("GPL v2");
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