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linux/drivers/regulator/pca9450-regulator.c
Frieder Schrempf c8c1ab2c5c
regulator: pca9450: Handle hardware with fixed SD_VSEL for LDO5 
There are two ways to set the output voltage of the LD05
regulator. First by writing to the voltage selection registers
and second by toggling the SD_VSEL signal.

Usually board designers connect SD_VSEL to the VSELECT signal
controlled by the USDHC controller, but in some cases the
signal is hardwired to a fixed low level (therefore selecting
3.3V as initial value for allowing to boot from the SD card).

In these cases, the voltage is only determined by the value
of the LDO5CTRL_L register. Introduce a property
nxp,sd-vsel-fixed-low to let the driver know that SD_VSEL
is low and there is no GPIO to actually get that
information from dynamically.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Link: https://patch.msgid.link/20250303132258.50204-1-frieder@fris.de
Signed-off-by: Mark Brown <broonie@kernel.org>
2025-03-03 13:38:23 +00:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2020 NXP.
* NXP PCA9450 pmic driver
*/
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/pca9450.h>
struct pc9450_dvs_config {
unsigned int run_reg; /* dvs0 */
unsigned int run_mask;
unsigned int standby_reg; /* dvs1 */
unsigned int standby_mask;
};
struct pca9450_regulator_desc {
struct regulator_desc desc;
const struct pc9450_dvs_config dvs;
};
struct pca9450 {
struct device *dev;
struct regmap *regmap;
struct gpio_desc *sd_vsel_gpio;
enum pca9450_chip_type type;
unsigned int rcnt;
int irq;
bool sd_vsel_fixed_low;
};
static const struct regmap_range pca9450_status_range = {
.range_min = PCA9450_REG_INT1,
.range_max = PCA9450_REG_PWRON_STAT,
};
static const struct regmap_access_table pca9450_volatile_regs = {
.yes_ranges = &pca9450_status_range,
.n_yes_ranges = 1,
};
static const struct regmap_config pca9450_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.volatile_table = &pca9450_volatile_regs,
.max_register = PCA9450_MAX_REGISTER - 1,
.cache_type = REGCACHE_MAPLE,
};
/*
* BUCK1/2/3
* BUCK1RAM[1:0] BUCK1 DVS ramp rate setting
* 00: 25mV/1usec
* 01: 25mV/2usec
* 10: 25mV/4usec
* 11: 25mV/8usec
*/
static const unsigned int pca9450_dvs_buck_ramp_table[] = {
25000, 12500, 6250, 3125
};
static const struct regulator_ops pca9450_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 = regulator_set_ramp_delay_regmap,
};
static const struct regulator_ops pca9450_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,
};
static const struct regulator_ops pca9450_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 = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
};
static unsigned int pca9450_ldo5_get_reg_voltage_sel(struct regulator_dev *rdev)
{
struct pca9450 *pca9450 = rdev_get_drvdata(rdev);
if (pca9450->sd_vsel_fixed_low)
return PCA9450_REG_LDO5CTRL_L;
if (pca9450->sd_vsel_gpio && !gpiod_get_value(pca9450->sd_vsel_gpio))
return PCA9450_REG_LDO5CTRL_L;
return rdev->desc->vsel_reg;
}
static int pca9450_ldo5_get_voltage_sel_regmap(struct regulator_dev *rdev)
{
unsigned int val;
int ret;
ret = regmap_read(rdev->regmap, pca9450_ldo5_get_reg_voltage_sel(rdev), &val);
if (ret != 0)
return ret;
val &= rdev->desc->vsel_mask;
val >>= ffs(rdev->desc->vsel_mask) - 1;
return val;
}
static int pca9450_ldo5_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned int sel)
{
int ret;
sel <<= ffs(rdev->desc->vsel_mask) - 1;
ret = regmap_update_bits(rdev->regmap, pca9450_ldo5_get_reg_voltage_sel(rdev),
rdev->desc->vsel_mask, sel);
if (ret)
return ret;
if (rdev->desc->apply_bit)
ret = regmap_update_bits(rdev->regmap, rdev->desc->apply_reg,
rdev->desc->apply_bit,
rdev->desc->apply_bit);
return ret;
}
static const struct regulator_ops pca9450_ldo5_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 = pca9450_ldo5_set_voltage_sel_regmap,
.get_voltage_sel = pca9450_ldo5_get_voltage_sel_regmap,
};
/*
* BUCK1/2/3
* 0.60 to 2.1875V (12.5mV step)
*/
static const struct linear_range pca9450_dvs_buck_volts[] = {
REGULATOR_LINEAR_RANGE(600000, 0x00, 0x7F, 12500),
};
/*
* BUCK1/3
* 0.65 to 2.2375V (12.5mV step)
*/
static const struct linear_range pca9451a_dvs_buck_volts[] = {
REGULATOR_LINEAR_RANGE(650000, 0x00, 0x7F, 12500),
};
/*
* BUCK4/5/6
* 0.6V to 3.4V (25mV step)
*/
static const struct linear_range pca9450_buck_volts[] = {
REGULATOR_LINEAR_RANGE(600000, 0x00, 0x70, 25000),
REGULATOR_LINEAR_RANGE(3400000, 0x71, 0x7F, 0),
};
/*
* LDO1
* 1.6 to 3.3V ()
*/
static const struct linear_range pca9450_ldo1_volts[] = {
REGULATOR_LINEAR_RANGE(1600000, 0x00, 0x03, 100000),
REGULATOR_LINEAR_RANGE(3000000, 0x04, 0x07, 100000),
};
/*
* LDO2
* 0.8 to 1.15V (50mV step)
*/
static const struct linear_range pca9450_ldo2_volts[] = {
REGULATOR_LINEAR_RANGE(800000, 0x00, 0x07, 50000),
};
/*
* LDO3/4
* 0.8 to 3.3V (100mV step)
*/
static const struct linear_range pca9450_ldo34_volts[] = {
REGULATOR_LINEAR_RANGE(800000, 0x00, 0x19, 100000),
REGULATOR_LINEAR_RANGE(3300000, 0x1A, 0x1F, 0),
};
/*
* LDO5
* 1.8 to 3.3V (100mV step)
*/
static const struct linear_range pca9450_ldo5_volts[] = {
REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
};
static int buck_set_dvs(const struct regulator_desc *desc,
struct device_node *np, struct regmap *regmap,
char *prop, unsigned int reg, unsigned int mask)
{
int ret, i;
uint32_t uv;
ret = of_property_read_u32(np, prop, &uv);
if (ret == -EINVAL)
return 0;
else if (ret)
return ret;
for (i = 0; i < desc->n_voltages; i++) {
ret = regulator_desc_list_voltage_linear_range(desc, i);
if (ret < 0)
continue;
if (ret == uv) {
i <<= ffs(desc->vsel_mask) - 1;
ret = regmap_update_bits(regmap, reg, mask, i);
break;
}
}
if (ret == 0) {
struct pca9450_regulator_desc *regulator = container_of(desc,
struct pca9450_regulator_desc, desc);
/* Enable DVS control through PMIC_STBY_REQ for this BUCK */
ret = regmap_update_bits(regmap, regulator->desc.enable_reg,
BUCK1_DVS_CTRL, BUCK1_DVS_CTRL);
}
return ret;
}
static int pca9450_set_dvs_levels(struct device_node *np,
const struct regulator_desc *desc,
struct regulator_config *cfg)
{
struct pca9450_regulator_desc *data = container_of(desc,
struct pca9450_regulator_desc, desc);
const struct pc9450_dvs_config *dvs = &data->dvs;
unsigned int reg, mask;
char *prop;
int i, ret = 0;
for (i = 0; i < PCA9450_DVS_LEVEL_MAX; i++) {
switch (i) {
case PCA9450_DVS_LEVEL_RUN:
prop = "nxp,dvs-run-voltage";
reg = dvs->run_reg;
mask = dvs->run_mask;
break;
case PCA9450_DVS_LEVEL_STANDBY:
prop = "nxp,dvs-standby-voltage";
reg = dvs->standby_reg;
mask = dvs->standby_mask;
break;
default:
return -EINVAL;
}
ret = buck_set_dvs(desc, np, cfg->regmap, prop, reg, mask);
if (ret)
break;
}
return ret;
}
static const struct pca9450_regulator_desc pca9450a_regulators[] = {
{
.desc = {
.name = "buck1",
.of_match = of_match_ptr("BUCK1"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_BUCK1,
.ops = &pca9450_dvs_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
.linear_ranges = pca9450_dvs_buck_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
.vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
.vsel_mask = BUCK1OUT_DVS0_MASK,
.enable_reg = PCA9450_REG_BUCK1CTRL,
.enable_mask = BUCK1_ENMODE_MASK,
.ramp_reg = PCA9450_REG_BUCK1CTRL,
.ramp_mask = BUCK1_RAMP_MASK,
.ramp_delay_table = pca9450_dvs_buck_ramp_table,
.n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
.enable_val = BUCK_ENMODE_ONREQ,
.owner = THIS_MODULE,
.of_parse_cb = pca9450_set_dvs_levels,
},
.dvs = {
.run_reg = PCA9450_REG_BUCK1OUT_DVS0,
.run_mask = BUCK1OUT_DVS0_MASK,
.standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
.standby_mask = BUCK1OUT_DVS1_MASK,
},
},
{
.desc = {
.name = "buck2",
.of_match = of_match_ptr("BUCK2"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_BUCK2,
.ops = &pca9450_dvs_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
.linear_ranges = pca9450_dvs_buck_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
.vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
.vsel_mask = BUCK2OUT_DVS0_MASK,
.enable_reg = PCA9450_REG_BUCK2CTRL,
.enable_mask = BUCK2_ENMODE_MASK,
.enable_val = BUCK_ENMODE_ONREQ_STBYREQ,
.ramp_reg = PCA9450_REG_BUCK2CTRL,
.ramp_mask = BUCK2_RAMP_MASK,
.ramp_delay_table = pca9450_dvs_buck_ramp_table,
.n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
.owner = THIS_MODULE,
.of_parse_cb = pca9450_set_dvs_levels,
},
.dvs = {
.run_reg = PCA9450_REG_BUCK2OUT_DVS0,
.run_mask = BUCK2OUT_DVS0_MASK,
.standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
.standby_mask = BUCK2OUT_DVS1_MASK,
},
},
{
.desc = {
.name = "buck3",
.of_match = of_match_ptr("BUCK3"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_BUCK3,
.ops = &pca9450_dvs_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_BUCK3_VOLTAGE_NUM,
.linear_ranges = pca9450_dvs_buck_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
.vsel_reg = PCA9450_REG_BUCK3OUT_DVS0,
.vsel_mask = BUCK3OUT_DVS0_MASK,
.enable_reg = PCA9450_REG_BUCK3CTRL,
.enable_mask = BUCK3_ENMODE_MASK,
.enable_val = BUCK_ENMODE_ONREQ,
.ramp_reg = PCA9450_REG_BUCK3CTRL,
.ramp_mask = BUCK3_RAMP_MASK,
.ramp_delay_table = pca9450_dvs_buck_ramp_table,
.n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
.owner = THIS_MODULE,
.of_parse_cb = pca9450_set_dvs_levels,
},
.dvs = {
.run_reg = PCA9450_REG_BUCK3OUT_DVS0,
.run_mask = BUCK3OUT_DVS0_MASK,
.standby_reg = PCA9450_REG_BUCK3OUT_DVS1,
.standby_mask = BUCK3OUT_DVS1_MASK,
},
},
{
.desc = {
.name = "buck4",
.of_match = of_match_ptr("BUCK4"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_BUCK4,
.ops = &pca9450_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
.linear_ranges = pca9450_buck_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
.vsel_reg = PCA9450_REG_BUCK4OUT,
.vsel_mask = BUCK4OUT_MASK,
.enable_reg = PCA9450_REG_BUCK4CTRL,
.enable_mask = BUCK4_ENMODE_MASK,
.enable_val = BUCK_ENMODE_ONREQ,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "buck5",
.of_match = of_match_ptr("BUCK5"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_BUCK5,
.ops = &pca9450_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
.linear_ranges = pca9450_buck_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
.vsel_reg = PCA9450_REG_BUCK5OUT,
.vsel_mask = BUCK5OUT_MASK,
.enable_reg = PCA9450_REG_BUCK5CTRL,
.enable_mask = BUCK5_ENMODE_MASK,
.enable_val = BUCK_ENMODE_ONREQ,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "buck6",
.of_match = of_match_ptr("BUCK6"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_BUCK6,
.ops = &pca9450_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
.linear_ranges = pca9450_buck_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
.vsel_reg = PCA9450_REG_BUCK6OUT,
.vsel_mask = BUCK6OUT_MASK,
.enable_reg = PCA9450_REG_BUCK6CTRL,
.enable_mask = BUCK6_ENMODE_MASK,
.enable_val = BUCK_ENMODE_ONREQ,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "ldo1",
.of_match = of_match_ptr("LDO1"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_LDO1,
.ops = &pca9450_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
.linear_ranges = pca9450_ldo1_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
.vsel_reg = PCA9450_REG_LDO1CTRL,
.vsel_mask = LDO1OUT_MASK,
.enable_reg = PCA9450_REG_LDO1CTRL,
.enable_mask = LDO1_EN_MASK,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "ldo2",
.of_match = of_match_ptr("LDO2"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_LDO2,
.ops = &pca9450_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
.linear_ranges = pca9450_ldo2_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
.vsel_reg = PCA9450_REG_LDO2CTRL,
.vsel_mask = LDO2OUT_MASK,
.enable_reg = PCA9450_REG_LDO2CTRL,
.enable_mask = LDO2_EN_MASK,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "ldo3",
.of_match = of_match_ptr("LDO3"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_LDO3,
.ops = &pca9450_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
.linear_ranges = pca9450_ldo34_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
.vsel_reg = PCA9450_REG_LDO3CTRL,
.vsel_mask = LDO3OUT_MASK,
.enable_reg = PCA9450_REG_LDO3CTRL,
.enable_mask = LDO3_EN_MASK,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "ldo4",
.of_match = of_match_ptr("LDO4"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_LDO4,
.ops = &pca9450_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
.linear_ranges = pca9450_ldo34_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
.vsel_reg = PCA9450_REG_LDO4CTRL,
.vsel_mask = LDO4OUT_MASK,
.enable_reg = PCA9450_REG_LDO4CTRL,
.enable_mask = LDO4_EN_MASK,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "ldo5",
.of_match = of_match_ptr("LDO5"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_LDO5,
.ops = &pca9450_ldo5_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
.linear_ranges = pca9450_ldo5_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
.vsel_reg = PCA9450_REG_LDO5CTRL_H,
.vsel_mask = LDO5HOUT_MASK,
.enable_reg = PCA9450_REG_LDO5CTRL_L,
.enable_mask = LDO5H_EN_MASK,
.owner = THIS_MODULE,
},
},
};
/*
* Buck3 removed on PCA9450B and connected with Buck1 internal for dual phase
* on PCA9450C as no Buck3.
*/
static const struct pca9450_regulator_desc pca9450bc_regulators[] = {
{
.desc = {
.name = "buck1",
.of_match = of_match_ptr("BUCK1"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_BUCK1,
.ops = &pca9450_dvs_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
.linear_ranges = pca9450_dvs_buck_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
.vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
.vsel_mask = BUCK1OUT_DVS0_MASK,
.enable_reg = PCA9450_REG_BUCK1CTRL,
.enable_mask = BUCK1_ENMODE_MASK,
.enable_val = BUCK_ENMODE_ONREQ,
.ramp_reg = PCA9450_REG_BUCK1CTRL,
.ramp_mask = BUCK1_RAMP_MASK,
.ramp_delay_table = pca9450_dvs_buck_ramp_table,
.n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
.owner = THIS_MODULE,
.of_parse_cb = pca9450_set_dvs_levels,
},
.dvs = {
.run_reg = PCA9450_REG_BUCK1OUT_DVS0,
.run_mask = BUCK1OUT_DVS0_MASK,
.standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
.standby_mask = BUCK1OUT_DVS1_MASK,
},
},
{
.desc = {
.name = "buck2",
.of_match = of_match_ptr("BUCK2"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_BUCK2,
.ops = &pca9450_dvs_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
.linear_ranges = pca9450_dvs_buck_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
.vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
.vsel_mask = BUCK2OUT_DVS0_MASK,
.enable_reg = PCA9450_REG_BUCK2CTRL,
.enable_mask = BUCK2_ENMODE_MASK,
.enable_val = BUCK_ENMODE_ONREQ_STBYREQ,
.ramp_reg = PCA9450_REG_BUCK2CTRL,
.ramp_mask = BUCK2_RAMP_MASK,
.ramp_delay_table = pca9450_dvs_buck_ramp_table,
.n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
.owner = THIS_MODULE,
.of_parse_cb = pca9450_set_dvs_levels,
},
.dvs = {
.run_reg = PCA9450_REG_BUCK2OUT_DVS0,
.run_mask = BUCK2OUT_DVS0_MASK,
.standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
.standby_mask = BUCK2OUT_DVS1_MASK,
},
},
{
.desc = {
.name = "buck4",
.of_match = of_match_ptr("BUCK4"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_BUCK4,
.ops = &pca9450_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
.linear_ranges = pca9450_buck_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
.vsel_reg = PCA9450_REG_BUCK4OUT,
.vsel_mask = BUCK4OUT_MASK,
.enable_reg = PCA9450_REG_BUCK4CTRL,
.enable_mask = BUCK4_ENMODE_MASK,
.enable_val = BUCK_ENMODE_ONREQ,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "buck5",
.of_match = of_match_ptr("BUCK5"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_BUCK5,
.ops = &pca9450_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
.linear_ranges = pca9450_buck_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
.vsel_reg = PCA9450_REG_BUCK5OUT,
.vsel_mask = BUCK5OUT_MASK,
.enable_reg = PCA9450_REG_BUCK5CTRL,
.enable_mask = BUCK5_ENMODE_MASK,
.enable_val = BUCK_ENMODE_ONREQ,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "buck6",
.of_match = of_match_ptr("BUCK6"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_BUCK6,
.ops = &pca9450_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
.linear_ranges = pca9450_buck_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
.vsel_reg = PCA9450_REG_BUCK6OUT,
.vsel_mask = BUCK6OUT_MASK,
.enable_reg = PCA9450_REG_BUCK6CTRL,
.enable_mask = BUCK6_ENMODE_MASK,
.enable_val = BUCK_ENMODE_ONREQ,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "ldo1",
.of_match = of_match_ptr("LDO1"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_LDO1,
.ops = &pca9450_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
.linear_ranges = pca9450_ldo1_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
.vsel_reg = PCA9450_REG_LDO1CTRL,
.vsel_mask = LDO1OUT_MASK,
.enable_reg = PCA9450_REG_LDO1CTRL,
.enable_mask = LDO1_EN_MASK,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "ldo2",
.of_match = of_match_ptr("LDO2"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_LDO2,
.ops = &pca9450_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
.linear_ranges = pca9450_ldo2_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
.vsel_reg = PCA9450_REG_LDO2CTRL,
.vsel_mask = LDO2OUT_MASK,
.enable_reg = PCA9450_REG_LDO2CTRL,
.enable_mask = LDO2_EN_MASK,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "ldo3",
.of_match = of_match_ptr("LDO3"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_LDO3,
.ops = &pca9450_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
.linear_ranges = pca9450_ldo34_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
.vsel_reg = PCA9450_REG_LDO3CTRL,
.vsel_mask = LDO3OUT_MASK,
.enable_reg = PCA9450_REG_LDO3CTRL,
.enable_mask = LDO3_EN_MASK,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "ldo4",
.of_match = of_match_ptr("LDO4"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_LDO4,
.ops = &pca9450_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
.linear_ranges = pca9450_ldo34_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
.vsel_reg = PCA9450_REG_LDO4CTRL,
.vsel_mask = LDO4OUT_MASK,
.enable_reg = PCA9450_REG_LDO4CTRL,
.enable_mask = LDO4_EN_MASK,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "ldo5",
.of_match = of_match_ptr("LDO5"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_LDO5,
.ops = &pca9450_ldo5_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
.linear_ranges = pca9450_ldo5_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
.vsel_reg = PCA9450_REG_LDO5CTRL_H,
.vsel_mask = LDO5HOUT_MASK,
.enable_reg = PCA9450_REG_LDO5CTRL_L,
.enable_mask = LDO5H_EN_MASK,
.owner = THIS_MODULE,
},
},
};
static const struct pca9450_regulator_desc pca9451a_regulators[] = {
{
.desc = {
.name = "buck1",
.of_match = of_match_ptr("BUCK1"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_BUCK1,
.ops = &pca9450_dvs_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
.linear_ranges = pca9451a_dvs_buck_volts,
.n_linear_ranges = ARRAY_SIZE(pca9451a_dvs_buck_volts),
.vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
.vsel_mask = BUCK1OUT_DVS0_MASK,
.enable_reg = PCA9450_REG_BUCK1CTRL,
.enable_mask = BUCK1_ENMODE_MASK,
.enable_val = BUCK_ENMODE_ONREQ,
.ramp_mask = BUCK1_RAMP_MASK,
.ramp_delay_table = pca9450_dvs_buck_ramp_table,
.n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
.owner = THIS_MODULE,
.of_parse_cb = pca9450_set_dvs_levels,
},
.dvs = {
.run_reg = PCA9450_REG_BUCK1OUT_DVS0,
.run_mask = BUCK1OUT_DVS0_MASK,
.standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
.standby_mask = BUCK1OUT_DVS1_MASK,
},
},
{
.desc = {
.name = "buck2",
.of_match = of_match_ptr("BUCK2"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_BUCK2,
.ops = &pca9450_dvs_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
.linear_ranges = pca9450_dvs_buck_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
.vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
.vsel_mask = BUCK2OUT_DVS0_MASK,
.enable_reg = PCA9450_REG_BUCK2CTRL,
.enable_mask = BUCK2_ENMODE_MASK,
.enable_val = BUCK_ENMODE_ONREQ_STBYREQ,
.ramp_mask = BUCK2_RAMP_MASK,
.ramp_delay_table = pca9450_dvs_buck_ramp_table,
.n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
.owner = THIS_MODULE,
.of_parse_cb = pca9450_set_dvs_levels,
},
.dvs = {
.run_reg = PCA9450_REG_BUCK2OUT_DVS0,
.run_mask = BUCK2OUT_DVS0_MASK,
.standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
.standby_mask = BUCK2OUT_DVS1_MASK,
},
},
{
.desc = {
.name = "buck4",
.of_match = of_match_ptr("BUCK4"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_BUCK4,
.ops = &pca9450_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
.linear_ranges = pca9450_buck_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
.vsel_reg = PCA9450_REG_BUCK4OUT,
.vsel_mask = BUCK4OUT_MASK,
.enable_reg = PCA9450_REG_BUCK4CTRL,
.enable_mask = BUCK4_ENMODE_MASK,
.enable_val = BUCK_ENMODE_ONREQ,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "buck5",
.of_match = of_match_ptr("BUCK5"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_BUCK5,
.ops = &pca9450_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
.linear_ranges = pca9450_buck_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
.vsel_reg = PCA9450_REG_BUCK5OUT,
.vsel_mask = BUCK5OUT_MASK,
.enable_reg = PCA9450_REG_BUCK5CTRL,
.enable_mask = BUCK5_ENMODE_MASK,
.enable_val = BUCK_ENMODE_ONREQ,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "buck6",
.of_match = of_match_ptr("BUCK6"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_BUCK6,
.ops = &pca9450_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
.linear_ranges = pca9450_buck_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
.vsel_reg = PCA9450_REG_BUCK6OUT,
.vsel_mask = BUCK6OUT_MASK,
.enable_reg = PCA9450_REG_BUCK6CTRL,
.enable_mask = BUCK6_ENMODE_MASK,
.enable_val = BUCK_ENMODE_ONREQ,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "ldo1",
.of_match = of_match_ptr("LDO1"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_LDO1,
.ops = &pca9450_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
.linear_ranges = pca9450_ldo1_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
.vsel_reg = PCA9450_REG_LDO1CTRL,
.vsel_mask = LDO1OUT_MASK,
.enable_reg = PCA9450_REG_LDO1CTRL,
.enable_mask = LDO1_EN_MASK,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "ldo3",
.of_match = of_match_ptr("LDO3"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_LDO3,
.ops = &pca9450_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
.linear_ranges = pca9450_ldo34_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
.vsel_reg = PCA9450_REG_LDO3CTRL,
.vsel_mask = LDO3OUT_MASK,
.enable_reg = PCA9450_REG_LDO3CTRL,
.enable_mask = LDO3_EN_MASK,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "ldo4",
.of_match = of_match_ptr("LDO4"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_LDO4,
.ops = &pca9450_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
.linear_ranges = pca9450_ldo34_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
.vsel_reg = PCA9450_REG_LDO4CTRL,
.vsel_mask = LDO4OUT_MASK,
.enable_reg = PCA9450_REG_LDO4CTRL,
.enable_mask = LDO4_EN_MASK,
.owner = THIS_MODULE,
},
},
{
.desc = {
.name = "ldo5",
.of_match = of_match_ptr("LDO5"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_LDO5,
.ops = &pca9450_ldo5_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
.linear_ranges = pca9450_ldo5_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
.vsel_reg = PCA9450_REG_LDO5CTRL_H,
.vsel_mask = LDO5HOUT_MASK,
.enable_reg = PCA9450_REG_LDO5CTRL_L,
.enable_mask = LDO5H_EN_MASK,
.owner = THIS_MODULE,
},
},
};
static irqreturn_t pca9450_irq_handler(int irq, void *data)
{
struct pca9450 *pca9450 = data;
struct regmap *regmap = pca9450->regmap;
unsigned int status;
int ret;
ret = regmap_read(regmap, PCA9450_REG_INT1, &status);
if (ret < 0) {
dev_err(pca9450->dev,
"Failed to read INT1(%d)\n", ret);
return IRQ_NONE;
}
if (status & IRQ_PWRON)
dev_warn(pca9450->dev, "PWRON interrupt.\n");
if (status & IRQ_WDOGB)
dev_warn(pca9450->dev, "WDOGB interrupt.\n");
if (status & IRQ_VR_FLT1)
dev_warn(pca9450->dev, "VRFLT1 interrupt.\n");
if (status & IRQ_VR_FLT2)
dev_warn(pca9450->dev, "VRFLT2 interrupt.\n");
if (status & IRQ_LOWVSYS)
dev_warn(pca9450->dev, "LOWVSYS interrupt.\n");
if (status & IRQ_THERM_105)
dev_warn(pca9450->dev, "IRQ_THERM_105 interrupt.\n");
if (status & IRQ_THERM_125)
dev_warn(pca9450->dev, "IRQ_THERM_125 interrupt.\n");
return IRQ_HANDLED;
}
static int pca9450_i2c_probe(struct i2c_client *i2c)
{
enum pca9450_chip_type type = (unsigned int)(uintptr_t)
of_device_get_match_data(&i2c->dev);
const struct pca9450_regulator_desc *regulator_desc;
struct regulator_config config = { };
struct regulator_dev *ldo5;
struct pca9450 *pca9450;
unsigned int device_id, i;
unsigned int reset_ctrl;
int ret;
pca9450 = devm_kzalloc(&i2c->dev, sizeof(struct pca9450), GFP_KERNEL);
if (!pca9450)
return -ENOMEM;
switch (type) {
case PCA9450_TYPE_PCA9450A:
regulator_desc = pca9450a_regulators;
pca9450->rcnt = ARRAY_SIZE(pca9450a_regulators);
break;
case PCA9450_TYPE_PCA9450BC:
regulator_desc = pca9450bc_regulators;
pca9450->rcnt = ARRAY_SIZE(pca9450bc_regulators);
break;
case PCA9450_TYPE_PCA9451A:
case PCA9450_TYPE_PCA9452:
regulator_desc = pca9451a_regulators;
pca9450->rcnt = ARRAY_SIZE(pca9451a_regulators);
break;
default:
dev_err(&i2c->dev, "Unknown device type");
return -EINVAL;
}
pca9450->irq = i2c->irq;
pca9450->type = type;
pca9450->dev = &i2c->dev;
dev_set_drvdata(&i2c->dev, pca9450);
pca9450->regmap = devm_regmap_init_i2c(i2c,
&pca9450_regmap_config);
if (IS_ERR(pca9450->regmap))
return dev_err_probe(&i2c->dev, PTR_ERR(pca9450->regmap),
"regmap initialization failed\n");
ret = regmap_read(pca9450->regmap, PCA9450_REG_DEV_ID, &device_id);
if (ret)
return dev_err_probe(&i2c->dev, ret, "Read device id error\n");
/* Check your board and dts for match the right pmic */
if (((device_id >> 4) != 0x1 && type == PCA9450_TYPE_PCA9450A) ||
((device_id >> 4) != 0x3 && type == PCA9450_TYPE_PCA9450BC) ||
((device_id >> 4) != 0x9 && type == PCA9450_TYPE_PCA9451A) ||
((device_id >> 4) != 0x9 && type == PCA9450_TYPE_PCA9452))
return dev_err_probe(&i2c->dev, -EINVAL,
"Device id(%x) mismatched\n", device_id >> 4);
for (i = 0; i < pca9450->rcnt; i++) {
const struct regulator_desc *desc;
struct regulator_dev *rdev;
const struct pca9450_regulator_desc *r;
r = &regulator_desc[i];
desc = &r->desc;
if (type == PCA9450_TYPE_PCA9451A && !strcmp(desc->name, "ldo3"))
continue;
config.regmap = pca9450->regmap;
config.dev = pca9450->dev;
config.driver_data = pca9450;
rdev = devm_regulator_register(pca9450->dev, desc, &config);
if (IS_ERR(rdev))
return dev_err_probe(pca9450->dev, PTR_ERR(rdev),
"Failed to register regulator(%s)\n", desc->name);
if (!strcmp(desc->name, "ldo5"))
ldo5 = rdev;
}
if (pca9450->irq) {
ret = devm_request_threaded_irq(pca9450->dev, pca9450->irq, NULL,
pca9450_irq_handler,
(IRQF_TRIGGER_FALLING | IRQF_ONESHOT),
"pca9450-irq", pca9450);
if (ret != 0)
return dev_err_probe(pca9450->dev, ret, "Failed to request IRQ: %d\n",
pca9450->irq);
/* Unmask all interrupt except PWRON/WDOG/RSVD */
ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_INT1_MSK,
IRQ_VR_FLT1 | IRQ_VR_FLT2 | IRQ_LOWVSYS |
IRQ_THERM_105 | IRQ_THERM_125,
IRQ_PWRON | IRQ_WDOGB | IRQ_RSVD);
if (ret)
return dev_err_probe(&i2c->dev, ret, "Unmask irq error\n");
}
/* Clear PRESET_EN bit in BUCK123_DVS to use DVS registers */
ret = regmap_clear_bits(pca9450->regmap, PCA9450_REG_BUCK123_DVS,
BUCK123_PRESET_EN);
if (ret)
return dev_err_probe(&i2c->dev, ret, "Failed to clear PRESET_EN bit\n");
if (of_property_read_bool(i2c->dev.of_node, "nxp,wdog_b-warm-reset"))
reset_ctrl = WDOG_B_CFG_WARM;
else
reset_ctrl = WDOG_B_CFG_COLD_LDO12;
/* Set reset behavior on assertion of WDOG_B signal */
ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_RESET_CTRL,
WDOG_B_CFG_MASK, reset_ctrl);
if (ret)
return dev_err_probe(&i2c->dev, ret, "Failed to set WDOG_B reset behavior\n");
if (of_property_read_bool(i2c->dev.of_node, "nxp,i2c-lt-enable")) {
/* Enable I2C Level Translator */
ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_CONFIG2,
I2C_LT_MASK, I2C_LT_ON_STANDBY_RUN);
if (ret)
return dev_err_probe(&i2c->dev, ret,
"Failed to enable I2C level translator\n");
}
/*
* For LDO5 we need to be able to check the status of the SD_VSEL input in
* order to know which control register is used. Most boards connect SD_VSEL
* to the VSELECT signal, so we can use the GPIO that is internally routed
* to this signal (if SION bit is set in IOMUX).
*/
pca9450->sd_vsel_gpio = gpiod_get_optional(&ldo5->dev, "sd-vsel", GPIOD_IN);
if (IS_ERR(pca9450->sd_vsel_gpio)) {
dev_err(&i2c->dev, "Failed to get SD_VSEL GPIO\n");
return ret;
}
pca9450->sd_vsel_fixed_low =
of_property_read_bool(ldo5->dev.of_node, "nxp,sd-vsel-fixed-low");
dev_info(&i2c->dev, "%s probed.\n",
type == PCA9450_TYPE_PCA9450A ? "pca9450a" :
(type == PCA9450_TYPE_PCA9451A ? "pca9451a" : "pca9450bc"));
return 0;
}
static const struct of_device_id pca9450_of_match[] = {
{
.compatible = "nxp,pca9450a",
.data = (void *)PCA9450_TYPE_PCA9450A,
},
{
.compatible = "nxp,pca9450b",
.data = (void *)PCA9450_TYPE_PCA9450BC,
},
{
.compatible = "nxp,pca9450c",
.data = (void *)PCA9450_TYPE_PCA9450BC,
},
{
.compatible = "nxp,pca9451a",
.data = (void *)PCA9450_TYPE_PCA9451A,
},
{
.compatible = "nxp,pca9452",
.data = (void *)PCA9450_TYPE_PCA9452,
},
{ }
};
MODULE_DEVICE_TABLE(of, pca9450_of_match);
static struct i2c_driver pca9450_i2c_driver = {
.driver = {
.name = "nxp-pca9450",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
.of_match_table = pca9450_of_match,
},
.probe = pca9450_i2c_probe,
};
module_i2c_driver(pca9450_i2c_driver);
MODULE_AUTHOR("Robin Gong <yibin.gong@nxp.com>");
MODULE_DESCRIPTION("NXP PCA9450 Power Management IC driver");
MODULE_LICENSE("GPL");
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