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linux/drivers/regulator/bd9576-regulator.c
Matti Vaittinen d4e93e8da0
regulator: bd71815: bd71828: bd9576: Use dev_err_probe() 
The dev_err_probe() has (at least) following benefits over dev_err()
when printing an error print for a failed function call at a device
driver probe:
        - Omit error level print if error is 'EPRBE_DEFER'
        - Standardized print format for returned error
        - return the error value allowing shortening calls like:

        if (ret) {
                dev_err(...);
                return ret;
        }

        to

        if (ret)
                return dev_err_probe(...);

Convert the ROHM BD71828, ROHM BD71815 and ROHM BD9576 regulator drivers
to use the dev_err_probe() when returned error is not hard-coded constant.

Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Link: https://lore.kernel.org/r/0b644da4a8f58558ffe474d2593f85c46de2f965.1669203610.git.mazziesaccount@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2022-11-23 13:09:05 +00:00

1140 lines
31 KiB
C
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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2020 ROHM Semiconductors
// ROHM BD9576MUF/BD9573MUF regulator driver
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/mfd/rohm-bd957x.h>
#include <linux/mfd/rohm-generic.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#define BD957X_VOUTS1_VOLT 3300000
#define BD957X_VOUTS4_BASE_VOLT 1030000
#define BD957X_VOUTS34_NUM_VOLT 32
#define BD9576_THERM_IRQ_MASK_TW BIT(5)
#define BD9576_xVD_IRQ_MASK_VOUTL1 BIT(5)
#define BD9576_UVD_IRQ_MASK_VOUTS1_OCW BIT(6)
#define BD9576_xVD_IRQ_MASK_VOUT1TO4 0x0F
static const unsigned int vout1_volt_table[] = {
5000000, 4900000, 4800000, 4700000, 4600000,
4500000, 4500000, 4500000, 5000000, 5100000,
5200000, 5300000, 5400000, 5500000, 5500000,
5500000
};
static const unsigned int vout2_volt_table[] = {
1800000, 1780000, 1760000, 1740000, 1720000,
1700000, 1680000, 1660000, 1800000, 1820000,
1840000, 1860000, 1880000, 1900000, 1920000,
1940000
};
static const unsigned int voutl1_volt_table[] = {
2500000, 2540000, 2580000, 2620000, 2660000,
2700000, 2740000, 2780000, 2500000, 2460000,
2420000, 2380000, 2340000, 2300000, 2260000,
2220000
};
static const struct linear_range vout1_xvd_ranges[] = {
REGULATOR_LINEAR_RANGE(225000, 0x01, 0x2b, 0),
REGULATOR_LINEAR_RANGE(225000, 0x2c, 0x54, 5000),
REGULATOR_LINEAR_RANGE(425000, 0x55, 0x7f, 0),
};
static const struct linear_range vout234_xvd_ranges[] = {
REGULATOR_LINEAR_RANGE(17000, 0x01, 0x0f, 0),
REGULATOR_LINEAR_RANGE(17000, 0x10, 0x6d, 1000),
REGULATOR_LINEAR_RANGE(110000, 0x6e, 0x7f, 0),
};
static const struct linear_range voutL1_xvd_ranges[] = {
REGULATOR_LINEAR_RANGE(34000, 0x01, 0x0f, 0),
REGULATOR_LINEAR_RANGE(34000, 0x10, 0x6d, 2000),
REGULATOR_LINEAR_RANGE(220000, 0x6e, 0x7f, 0),
};
static struct linear_range voutS1_ocw_ranges_internal[] = {
REGULATOR_LINEAR_RANGE(200000, 0x01, 0x04, 0),
REGULATOR_LINEAR_RANGE(250000, 0x05, 0x18, 50000),
REGULATOR_LINEAR_RANGE(1200000, 0x19, 0x3f, 0),
};
static struct linear_range voutS1_ocw_ranges[] = {
REGULATOR_LINEAR_RANGE(50000, 0x01, 0x04, 0),
REGULATOR_LINEAR_RANGE(60000, 0x05, 0x18, 10000),
REGULATOR_LINEAR_RANGE(250000, 0x19, 0x3f, 0),
};
static struct linear_range voutS1_ocp_ranges_internal[] = {
REGULATOR_LINEAR_RANGE(300000, 0x01, 0x06, 0),
REGULATOR_LINEAR_RANGE(350000, 0x7, 0x1b, 50000),
REGULATOR_LINEAR_RANGE(1350000, 0x1c, 0x3f, 0),
};
static struct linear_range voutS1_ocp_ranges[] = {
REGULATOR_LINEAR_RANGE(70000, 0x01, 0x06, 0),
REGULATOR_LINEAR_RANGE(80000, 0x7, 0x1b, 10000),
REGULATOR_LINEAR_RANGE(280000, 0x1c, 0x3f, 0),
};
struct bd957x_regulator_data {
struct regulator_desc desc;
int base_voltage;
struct regulator_dev *rdev;
int ovd_notif;
int uvd_notif;
int temp_notif;
int ovd_err;
int uvd_err;
int temp_err;
const struct linear_range *xvd_ranges;
int num_xvd_ranges;
bool oc_supported;
unsigned int ovd_reg;
unsigned int uvd_reg;
unsigned int xvd_mask;
unsigned int ocp_reg;
unsigned int ocp_mask;
unsigned int ocw_reg;
unsigned int ocw_mask;
unsigned int ocw_rfet;
};
#define BD9576_NUM_REGULATORS 6
#define BD9576_NUM_OVD_REGULATORS 5
struct bd957x_data {
struct bd957x_regulator_data regulator_data[BD9576_NUM_REGULATORS];
struct regmap *regmap;
struct delayed_work therm_irq_suppress;
struct delayed_work ovd_irq_suppress;
struct delayed_work uvd_irq_suppress;
unsigned int therm_irq;
unsigned int ovd_irq;
unsigned int uvd_irq;
spinlock_t err_lock;
int regulator_global_err;
};
static int bd957x_vout34_list_voltage(struct regulator_dev *rdev,
unsigned int selector)
{
const struct regulator_desc *desc = rdev->desc;
int multiplier = selector & desc->vsel_mask & 0x7f;
int tune;
/* VOUT3 and 4 has 10mV step */
tune = multiplier * 10000;
if (!(selector & 0x80))
return desc->fixed_uV - tune;
return desc->fixed_uV + tune;
}
static int bd957x_list_voltage(struct regulator_dev *rdev,
unsigned int selector)
{
const struct regulator_desc *desc = rdev->desc;
int index = selector & desc->vsel_mask & 0x7f;
if (!(selector & 0x80))
index += desc->n_voltages/2;
if (index >= desc->n_voltages)
return -EINVAL;
return desc->volt_table[index];
}
static void bd9576_fill_ovd_flags(struct bd957x_regulator_data *data,
bool warn)
{
if (warn) {
data->ovd_notif = REGULATOR_EVENT_OVER_VOLTAGE_WARN;
data->ovd_err = REGULATOR_ERROR_OVER_VOLTAGE_WARN;
} else {
data->ovd_notif = REGULATOR_EVENT_REGULATION_OUT;
data->ovd_err = REGULATOR_ERROR_REGULATION_OUT;
}
}
static void bd9576_fill_ocp_flags(struct bd957x_regulator_data *data,
bool warn)
{
if (warn) {
data->uvd_notif = REGULATOR_EVENT_OVER_CURRENT_WARN;
data->uvd_err = REGULATOR_ERROR_OVER_CURRENT_WARN;
} else {
data->uvd_notif = REGULATOR_EVENT_OVER_CURRENT;
data->uvd_err = REGULATOR_ERROR_OVER_CURRENT;
}
}
static void bd9576_fill_uvd_flags(struct bd957x_regulator_data *data,
bool warn)
{
if (warn) {
data->uvd_notif = REGULATOR_EVENT_UNDER_VOLTAGE_WARN;
data->uvd_err = REGULATOR_ERROR_UNDER_VOLTAGE_WARN;
} else {
data->uvd_notif = REGULATOR_EVENT_UNDER_VOLTAGE;
data->uvd_err = REGULATOR_ERROR_UNDER_VOLTAGE;
}
}
static void bd9576_fill_temp_flags(struct bd957x_regulator_data *data,
bool enable, bool warn)
{
if (!enable) {
data->temp_notif = 0;
data->temp_err = 0;
} else if (warn) {
data->temp_notif = REGULATOR_EVENT_OVER_TEMP_WARN;
data->temp_err = REGULATOR_ERROR_OVER_TEMP_WARN;
} else {
data->temp_notif = REGULATOR_EVENT_OVER_TEMP;
data->temp_err = REGULATOR_ERROR_OVER_TEMP;
}
}
static int bd9576_set_limit(const struct linear_range *r, int num_ranges,
struct regmap *regmap, int reg, int mask, int lim)
{
int ret;
bool found;
int sel = 0;
if (lim) {
ret = linear_range_get_selector_low_array(r, num_ranges,
lim, &sel, &found);
if (ret)
return ret;
if (!found)
dev_warn(regmap_get_device(regmap),
"limit %d out of range. Setting lower\n",
lim);
}
return regmap_update_bits(regmap, reg, mask, sel);
}
static bool check_ocp_flag_mismatch(struct regulator_dev *rdev, int severity,
struct bd957x_regulator_data *r)
{
if ((severity == REGULATOR_SEVERITY_ERR &&
r->uvd_notif != REGULATOR_EVENT_OVER_CURRENT) ||
(severity == REGULATOR_SEVERITY_WARN &&
r->uvd_notif != REGULATOR_EVENT_OVER_CURRENT_WARN)) {
dev_warn(rdev_get_dev(rdev),
"Can't support both OCP WARN and ERR\n");
/* Do not overwrite ERR config with WARN */
if (severity == REGULATOR_SEVERITY_WARN)
return true;
bd9576_fill_ocp_flags(r, 0);
}
return false;
}
static bool check_uvd_flag_mismatch(struct regulator_dev *rdev, int severity,
struct bd957x_regulator_data *r)
{
if ((severity == REGULATOR_SEVERITY_ERR &&
r->uvd_notif != REGULATOR_EVENT_UNDER_VOLTAGE) ||
(severity == REGULATOR_SEVERITY_WARN &&
r->uvd_notif != REGULATOR_EVENT_UNDER_VOLTAGE_WARN)) {
dev_warn(rdev_get_dev(rdev),
"Can't support both UVD WARN and ERR\n");
if (severity == REGULATOR_SEVERITY_WARN)
return true;
bd9576_fill_uvd_flags(r, 0);
}
return false;
}
static bool check_ovd_flag_mismatch(struct regulator_dev *rdev, int severity,
struct bd957x_regulator_data *r)
{
if ((severity == REGULATOR_SEVERITY_ERR &&
r->ovd_notif != REGULATOR_EVENT_REGULATION_OUT) ||
(severity == REGULATOR_SEVERITY_WARN &&
r->ovd_notif != REGULATOR_EVENT_OVER_VOLTAGE_WARN)) {
dev_warn(rdev_get_dev(rdev),
"Can't support both OVD WARN and ERR\n");
if (severity == REGULATOR_SEVERITY_WARN)
return true;
bd9576_fill_ovd_flags(r, 0);
}
return false;
}
static bool check_temp_flag_mismatch(struct regulator_dev *rdev, int severity,
struct bd957x_regulator_data *r)
{
if ((severity == REGULATOR_SEVERITY_ERR &&
r->temp_notif != REGULATOR_EVENT_OVER_TEMP) ||
(severity == REGULATOR_SEVERITY_WARN &&
r->temp_notif != REGULATOR_EVENT_OVER_TEMP_WARN)) {
dev_warn(rdev_get_dev(rdev),
"Can't support both thermal WARN and ERR\n");
if (severity == REGULATOR_SEVERITY_WARN)
return true;
}
return false;
}
static int bd9576_set_ocp(struct regulator_dev *rdev, int lim_uA, int severity,
bool enable)
{
struct bd957x_data *d;
struct bd957x_regulator_data *r;
int reg, mask;
int Vfet, rfet;
const struct linear_range *range;
int num_ranges;
if ((lim_uA && !enable) || (!lim_uA && enable))
return -EINVAL;
r = container_of(rdev->desc, struct bd957x_regulator_data, desc);
if (!r->oc_supported)
return -EINVAL;
d = rdev_get_drvdata(rdev);
if (severity == REGULATOR_SEVERITY_PROT) {
reg = r->ocp_reg;
mask = r->ocp_mask;
if (r->ocw_rfet) {
range = voutS1_ocp_ranges;
num_ranges = ARRAY_SIZE(voutS1_ocp_ranges);
rfet = r->ocw_rfet / 1000;
} else {
range = voutS1_ocp_ranges_internal;
num_ranges = ARRAY_SIZE(voutS1_ocp_ranges_internal);
/* Internal values are already micro-amperes */
rfet = 1000;
}
} else {
reg = r->ocw_reg;
mask = r->ocw_mask;
if (r->ocw_rfet) {
range = voutS1_ocw_ranges;
num_ranges = ARRAY_SIZE(voutS1_ocw_ranges);
rfet = r->ocw_rfet / 1000;
} else {
range = voutS1_ocw_ranges_internal;
num_ranges = ARRAY_SIZE(voutS1_ocw_ranges_internal);
/* Internal values are already micro-amperes */
rfet = 1000;
}
/* We abuse uvd fields for OCW on VoutS1 */
if (r->uvd_notif) {
/*
* If both warning and error are requested, prioritize
* ERROR configuration
*/
if (check_ocp_flag_mismatch(rdev, severity, r))
return 0;
} else {
bool warn = severity == REGULATOR_SEVERITY_WARN;
bd9576_fill_ocp_flags(r, warn);
}
}
/*
* limits are given in uA, rfet is mOhm
* Divide lim_uA by 1000 to get Vfet in uV.
* (We expect both Rfet and limit uA to be magnitude of hundreds of
* milli Amperes & milli Ohms => we should still have decent accuracy)
*/
Vfet = lim_uA/1000 * rfet;
return bd9576_set_limit(range, num_ranges, d->regmap,
reg, mask, Vfet);
}
static int bd9576_set_uvp(struct regulator_dev *rdev, int lim_uV, int severity,
bool enable)
{
struct bd957x_data *d;
struct bd957x_regulator_data *r;
int mask, reg;
if (severity == REGULATOR_SEVERITY_PROT) {
if (!enable || lim_uV)
return -EINVAL;
return 0;
}
/*
* BD9576 has enable control as a special value in limit reg. Can't
* set limit but keep feature disabled or enable W/O given limit.
*/
if ((lim_uV && !enable) || (!lim_uV && enable))
return -EINVAL;
r = container_of(rdev->desc, struct bd957x_regulator_data, desc);
d = rdev_get_drvdata(rdev);
mask = r->xvd_mask;
reg = r->uvd_reg;
/*
* Check that there is no mismatch for what the detection IRQs are to
* be used.
*/
if (r->uvd_notif) {
if (check_uvd_flag_mismatch(rdev, severity, r))
return 0;
} else {
bd9576_fill_uvd_flags(r, severity == REGULATOR_SEVERITY_WARN);
}
return bd9576_set_limit(r->xvd_ranges, r->num_xvd_ranges, d->regmap,
reg, mask, lim_uV);
}
static int bd9576_set_ovp(struct regulator_dev *rdev, int lim_uV, int severity,
bool enable)
{
struct bd957x_data *d;
struct bd957x_regulator_data *r;
int mask, reg;
if (severity == REGULATOR_SEVERITY_PROT) {
if (!enable || lim_uV)
return -EINVAL;
return 0;
}
/*
* BD9576 has enable control as a special value in limit reg. Can't
* set limit but keep feature disabled or enable W/O given limit.
*/
if ((lim_uV && !enable) || (!lim_uV && enable))
return -EINVAL;
r = container_of(rdev->desc, struct bd957x_regulator_data, desc);
d = rdev_get_drvdata(rdev);
mask = r->xvd_mask;
reg = r->ovd_reg;
/*
* Check that there is no mismatch for what the detection IRQs are to
* be used.
*/
if (r->ovd_notif) {
if (check_ovd_flag_mismatch(rdev, severity, r))
return 0;
} else {
bd9576_fill_ovd_flags(r, severity == REGULATOR_SEVERITY_WARN);
}
return bd9576_set_limit(r->xvd_ranges, r->num_xvd_ranges, d->regmap,
reg, mask, lim_uV);
}
static int bd9576_set_tw(struct regulator_dev *rdev, int lim, int severity,
bool enable)
{
struct bd957x_data *d;
struct bd957x_regulator_data *r;
int i;
/*
* BD9576MUF has fixed temperature limits
* The detection can only be enabled/disabled
*/
if (lim)
return -EINVAL;
/* Protection can't be disabled */
if (severity == REGULATOR_SEVERITY_PROT) {
if (!enable)
return -EINVAL;
else
return 0;
}
r = container_of(rdev->desc, struct bd957x_regulator_data, desc);
d = rdev_get_drvdata(rdev);
/*
* Check that there is no mismatch for what the detection IRQs are to
* be used.
*/
if (r->temp_notif)
if (check_temp_flag_mismatch(rdev, severity, r))
return 0;
bd9576_fill_temp_flags(r, enable, severity == REGULATOR_SEVERITY_WARN);
if (enable)
return regmap_update_bits(d->regmap, BD957X_REG_INT_THERM_MASK,
BD9576_THERM_IRQ_MASK_TW, 0);
/*
* If any of the regulators is interested in thermal warning we keep IRQ
* enabled.
*/
for (i = 0; i < BD9576_NUM_REGULATORS; i++)
if (d->regulator_data[i].temp_notif)
return 0;
return regmap_update_bits(d->regmap, BD957X_REG_INT_THERM_MASK,
BD9576_THERM_IRQ_MASK_TW,
BD9576_THERM_IRQ_MASK_TW);
}
static const struct regulator_ops bd9573_vout34_ops = {
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = bd957x_vout34_list_voltage,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
};
static const struct regulator_ops bd9576_vout34_ops = {
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = bd957x_vout34_list_voltage,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_over_voltage_protection = bd9576_set_ovp,
.set_under_voltage_protection = bd9576_set_uvp,
.set_thermal_protection = bd9576_set_tw,
};
static const struct regulator_ops bd9573_vouts1_regulator_ops = {
.is_enabled = regulator_is_enabled_regmap,
};
static const struct regulator_ops bd9576_vouts1_regulator_ops = {
.is_enabled = regulator_is_enabled_regmap,
.set_over_current_protection = bd9576_set_ocp,
};
static const struct regulator_ops bd9573_ops = {
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = bd957x_list_voltage,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
};
static const struct regulator_ops bd9576_ops = {
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = bd957x_list_voltage,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_over_voltage_protection = bd9576_set_ovp,
.set_under_voltage_protection = bd9576_set_uvp,
.set_thermal_protection = bd9576_set_tw,
};
static const struct regulator_ops *bd9573_ops_arr[] = {
[BD957X_VD50] = &bd9573_ops,
[BD957X_VD18] = &bd9573_ops,
[BD957X_VDDDR] = &bd9573_vout34_ops,
[BD957X_VD10] = &bd9573_vout34_ops,
[BD957X_VOUTL1] = &bd9573_ops,
[BD957X_VOUTS1] = &bd9573_vouts1_regulator_ops,
};
static const struct regulator_ops *bd9576_ops_arr[] = {
[BD957X_VD50] = &bd9576_ops,
[BD957X_VD18] = &bd9576_ops,
[BD957X_VDDDR] = &bd9576_vout34_ops,
[BD957X_VD10] = &bd9576_vout34_ops,
[BD957X_VOUTL1] = &bd9576_ops,
[BD957X_VOUTS1] = &bd9576_vouts1_regulator_ops,
};
static int vouts1_get_fet_res(struct device_node *np,
const struct regulator_desc *desc,
struct regulator_config *cfg)
{
struct bd957x_regulator_data *data;
int ret;
u32 uohms;
data = container_of(desc, struct bd957x_regulator_data, desc);
ret = of_property_read_u32(np, "rohm,ocw-fet-ron-micro-ohms", &uohms);
if (ret) {
if (ret != -EINVAL)
return ret;
return 0;
}
data->ocw_rfet = uohms;
return 0;
}
static struct bd957x_data bd957x_regulators = {
.regulator_data = {
{
.desc = {
.name = "VD50",
.of_match = of_match_ptr("regulator-vd50"),
.regulators_node = of_match_ptr("regulators"),
.id = BD957X_VD50,
.type = REGULATOR_VOLTAGE,
.volt_table = &vout1_volt_table[0],
.n_voltages = ARRAY_SIZE(vout1_volt_table),
.vsel_reg = BD957X_REG_VOUT1_TUNE,
.vsel_mask = BD957X_MASK_VOUT1_TUNE,
.enable_reg = BD957X_REG_POW_TRIGGER1,
.enable_mask = BD957X_REGULATOR_EN_MASK,
.enable_val = BD957X_REGULATOR_DIS_VAL,
.enable_is_inverted = true,
.owner = THIS_MODULE,
},
.xvd_ranges = vout1_xvd_ranges,
.num_xvd_ranges = ARRAY_SIZE(vout1_xvd_ranges),
.ovd_reg = BD9576_REG_VOUT1_OVD,
.uvd_reg = BD9576_REG_VOUT1_UVD,
.xvd_mask = BD9576_MASK_XVD,
},
{
.desc = {
.name = "VD18",
.of_match = of_match_ptr("regulator-vd18"),
.regulators_node = of_match_ptr("regulators"),
.id = BD957X_VD18,
.type = REGULATOR_VOLTAGE,
.volt_table = &vout2_volt_table[0],
.n_voltages = ARRAY_SIZE(vout2_volt_table),
.vsel_reg = BD957X_REG_VOUT2_TUNE,
.vsel_mask = BD957X_MASK_VOUT2_TUNE,
.enable_reg = BD957X_REG_POW_TRIGGER2,
.enable_mask = BD957X_REGULATOR_EN_MASK,
.enable_val = BD957X_REGULATOR_DIS_VAL,
.enable_is_inverted = true,
.owner = THIS_MODULE,
},
.xvd_ranges = vout234_xvd_ranges,
.num_xvd_ranges = ARRAY_SIZE(vout234_xvd_ranges),
.ovd_reg = BD9576_REG_VOUT2_OVD,
.uvd_reg = BD9576_REG_VOUT2_UVD,
.xvd_mask = BD9576_MASK_XVD,
},
{
.desc = {
.name = "VDDDR",
.of_match = of_match_ptr("regulator-vdddr"),
.regulators_node = of_match_ptr("regulators"),
.id = BD957X_VDDDR,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD957X_VOUTS34_NUM_VOLT,
.vsel_reg = BD957X_REG_VOUT3_TUNE,
.vsel_mask = BD957X_MASK_VOUT3_TUNE,
.enable_reg = BD957X_REG_POW_TRIGGER3,
.enable_mask = BD957X_REGULATOR_EN_MASK,
.enable_val = BD957X_REGULATOR_DIS_VAL,
.enable_is_inverted = true,
.owner = THIS_MODULE,
},
.ovd_reg = BD9576_REG_VOUT3_OVD,
.uvd_reg = BD9576_REG_VOUT3_UVD,
.xvd_mask = BD9576_MASK_XVD,
.xvd_ranges = vout234_xvd_ranges,
.num_xvd_ranges = ARRAY_SIZE(vout234_xvd_ranges),
},
{
.desc = {
.name = "VD10",
.of_match = of_match_ptr("regulator-vd10"),
.regulators_node = of_match_ptr("regulators"),
.id = BD957X_VD10,
.type = REGULATOR_VOLTAGE,
.fixed_uV = BD957X_VOUTS4_BASE_VOLT,
.n_voltages = BD957X_VOUTS34_NUM_VOLT,
.vsel_reg = BD957X_REG_VOUT4_TUNE,
.vsel_mask = BD957X_MASK_VOUT4_TUNE,
.enable_reg = BD957X_REG_POW_TRIGGER4,
.enable_mask = BD957X_REGULATOR_EN_MASK,
.enable_val = BD957X_REGULATOR_DIS_VAL,
.enable_is_inverted = true,
.owner = THIS_MODULE,
},
.xvd_ranges = vout234_xvd_ranges,
.num_xvd_ranges = ARRAY_SIZE(vout234_xvd_ranges),
.ovd_reg = BD9576_REG_VOUT4_OVD,
.uvd_reg = BD9576_REG_VOUT4_UVD,
.xvd_mask = BD9576_MASK_XVD,
},
{
.desc = {
.name = "VOUTL1",
.of_match = of_match_ptr("regulator-voutl1"),
.regulators_node = of_match_ptr("regulators"),
.id = BD957X_VOUTL1,
.type = REGULATOR_VOLTAGE,
.volt_table = &voutl1_volt_table[0],
.n_voltages = ARRAY_SIZE(voutl1_volt_table),
.vsel_reg = BD957X_REG_VOUTL1_TUNE,
.vsel_mask = BD957X_MASK_VOUTL1_TUNE,
.enable_reg = BD957X_REG_POW_TRIGGERL1,
.enable_mask = BD957X_REGULATOR_EN_MASK,
.enable_val = BD957X_REGULATOR_DIS_VAL,
.enable_is_inverted = true,
.owner = THIS_MODULE,
},
.xvd_ranges = voutL1_xvd_ranges,
.num_xvd_ranges = ARRAY_SIZE(voutL1_xvd_ranges),
.ovd_reg = BD9576_REG_VOUTL1_OVD,
.uvd_reg = BD9576_REG_VOUTL1_UVD,
.xvd_mask = BD9576_MASK_XVD,
},
{
.desc = {
.name = "VOUTS1",
.of_match = of_match_ptr("regulator-vouts1"),
.regulators_node = of_match_ptr("regulators"),
.id = BD957X_VOUTS1,
.type = REGULATOR_VOLTAGE,
.n_voltages = 1,
.fixed_uV = BD957X_VOUTS1_VOLT,
.enable_reg = BD957X_REG_POW_TRIGGERS1,
.enable_mask = BD957X_REGULATOR_EN_MASK,
.enable_val = BD957X_REGULATOR_DIS_VAL,
.enable_is_inverted = true,
.owner = THIS_MODULE,
.of_parse_cb = vouts1_get_fet_res,
},
.oc_supported = true,
.ocw_reg = BD9576_REG_VOUT1S_OCW,
.ocw_mask = BD9576_MASK_VOUT1S_OCW,
.ocp_reg = BD9576_REG_VOUT1S_OCP,
.ocp_mask = BD9576_MASK_VOUT1S_OCP,
},
},
};
static int bd9576_renable(struct regulator_irq_data *rid, int reg, int mask)
{
int val, ret;
struct bd957x_data *d = (struct bd957x_data *)rid->data;
ret = regmap_read(d->regmap, reg, &val);
if (ret)
return REGULATOR_FAILED_RETRY;
if (rid->opaque && rid->opaque == (val & mask)) {
/*
* It seems we stil have same status. Ack and return
* information that we are still out of limits and core
* should not enable IRQ
*/
regmap_write(d->regmap, reg, mask & val);
return REGULATOR_ERROR_ON;
}
rid->opaque = 0;
/*
* Status was changed. Either prolem was solved or we have new issues.
* Let's re-enable IRQs and be prepared to report problems again
*/
return REGULATOR_ERROR_CLEARED;
}
static int bd9576_uvd_renable(struct regulator_irq_data *rid)
{
return bd9576_renable(rid, BD957X_REG_INT_UVD_STAT, UVD_IRQ_VALID_MASK);
}
static int bd9576_ovd_renable(struct regulator_irq_data *rid)
{
return bd9576_renable(rid, BD957X_REG_INT_OVD_STAT, OVD_IRQ_VALID_MASK);
}
static int bd9576_temp_renable(struct regulator_irq_data *rid)
{
return bd9576_renable(rid, BD957X_REG_INT_THERM_STAT,
BD9576_THERM_IRQ_MASK_TW);
}
static int bd9576_uvd_handler(int irq, struct regulator_irq_data *rid,
unsigned long *dev_mask)
{
int val, ret, i;
struct bd957x_data *d = (struct bd957x_data *)rid->data;
ret = regmap_read(d->regmap, BD957X_REG_INT_UVD_STAT, &val);
if (ret)
return REGULATOR_FAILED_RETRY;
*dev_mask = 0;
rid->opaque = val & UVD_IRQ_VALID_MASK;
/*
* Go through the set status bits and report either error or warning
* to the notifier depending on what was flagged in DT
*/
*dev_mask = val & BD9576_xVD_IRQ_MASK_VOUT1TO4;
/* There is 1 bit gap in register after Vout1 .. Vout4 statuses */
*dev_mask |= ((val & BD9576_xVD_IRQ_MASK_VOUTL1) >> 1);
/*
* We (ab)use the uvd for OCW notification. DT parsing should
* have added correct OCW flag to uvd_notif and uvd_err for S1
*/
*dev_mask |= ((val & BD9576_UVD_IRQ_MASK_VOUTS1_OCW) >> 1);
for_each_set_bit(i, dev_mask, 6) {
struct bd957x_regulator_data *rdata;
struct regulator_err_state *stat;
rdata = &d->regulator_data[i];
stat = &rid->states[i];
stat->notifs = rdata->uvd_notif;
stat->errors = rdata->uvd_err;
}
ret = regmap_write(d->regmap, BD957X_REG_INT_UVD_STAT,
UVD_IRQ_VALID_MASK & val);
return 0;
}
static int bd9576_ovd_handler(int irq, struct regulator_irq_data *rid,
unsigned long *dev_mask)
{
int val, ret, i;
struct bd957x_data *d = (struct bd957x_data *)rid->data;
ret = regmap_read(d->regmap, BD957X_REG_INT_OVD_STAT, &val);
if (ret)
return REGULATOR_FAILED_RETRY;
rid->opaque = val & OVD_IRQ_VALID_MASK;
*dev_mask = 0;
if (!(val & OVD_IRQ_VALID_MASK))
return 0;
*dev_mask = val & BD9576_xVD_IRQ_MASK_VOUT1TO4;
/* There is 1 bit gap in register after Vout1 .. Vout4 statuses */
*dev_mask |= ((val & BD9576_xVD_IRQ_MASK_VOUTL1) >> 1);
for_each_set_bit(i, dev_mask, 5) {
struct bd957x_regulator_data *rdata;
struct regulator_err_state *stat;
rdata = &d->regulator_data[i];
stat = &rid->states[i];
stat->notifs = rdata->ovd_notif;
stat->errors = rdata->ovd_err;
}
/* Clear the sub-IRQ status */
regmap_write(d->regmap, BD957X_REG_INT_OVD_STAT,
OVD_IRQ_VALID_MASK & val);
return 0;
}
#define BD9576_DEV_MASK_ALL_REGULATORS 0x3F
static int bd9576_thermal_handler(int irq, struct regulator_irq_data *rid,
unsigned long *dev_mask)
{
int val, ret, i;
struct bd957x_data *d = (struct bd957x_data *)rid->data;
ret = regmap_read(d->regmap, BD957X_REG_INT_THERM_STAT, &val);
if (ret)
return REGULATOR_FAILED_RETRY;
if (!(val & BD9576_THERM_IRQ_MASK_TW)) {
*dev_mask = 0;
return 0;
}
*dev_mask = BD9576_DEV_MASK_ALL_REGULATORS;
for (i = 0; i < BD9576_NUM_REGULATORS; i++) {
struct bd957x_regulator_data *rdata;
struct regulator_err_state *stat;
rdata = &d->regulator_data[i];
stat = &rid->states[i];
stat->notifs = rdata->temp_notif;
stat->errors = rdata->temp_err;
}
/* Clear the sub-IRQ status */
regmap_write(d->regmap, BD957X_REG_INT_THERM_STAT,
BD9576_THERM_IRQ_MASK_TW);
return 0;
}
static int bd957x_probe(struct platform_device *pdev)
{
int i;
unsigned int num_reg_data;
bool vout_mode, ddr_sel, may_have_irqs = false;
struct regmap *regmap;
struct bd957x_data *ic_data;
struct regulator_config config = { 0 };
/* All regulators are related to UVD and thermal IRQs... */
struct regulator_dev *rdevs[BD9576_NUM_REGULATORS];
/* ...But VoutS1 is not flagged by OVD IRQ */
struct regulator_dev *ovd_devs[BD9576_NUM_OVD_REGULATORS];
static const struct regulator_irq_desc bd9576_notif_uvd = {
.name = "bd9576-uvd",
.irq_off_ms = 1000,
.map_event = bd9576_uvd_handler,
.renable = bd9576_uvd_renable,
.data = &bd957x_regulators,
};
static const struct regulator_irq_desc bd9576_notif_ovd = {
.name = "bd9576-ovd",
.irq_off_ms = 1000,
.map_event = bd9576_ovd_handler,
.renable = bd9576_ovd_renable,
.data = &bd957x_regulators,
};
static const struct regulator_irq_desc bd9576_notif_temp = {
.name = "bd9576-temp",
.irq_off_ms = 1000,
.map_event = bd9576_thermal_handler,
.renable = bd9576_temp_renable,
.data = &bd957x_regulators,
};
enum rohm_chip_type chip = platform_get_device_id(pdev)->driver_data;
num_reg_data = ARRAY_SIZE(bd957x_regulators.regulator_data);
ic_data = &bd957x_regulators;
regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!regmap) {
dev_err(&pdev->dev, "No regmap\n");
return -EINVAL;
}
ic_data->regmap = regmap;
vout_mode = device_property_read_bool(pdev->dev.parent,
"rohm,vout1-en-low");
if (vout_mode) {
struct gpio_desc *en;
dev_dbg(&pdev->dev, "GPIO controlled mode\n");
/* VOUT1 enable state judged by VOUT1_EN pin */
/* See if we have GPIO defined */
en = devm_fwnode_gpiod_get(&pdev->dev,
dev_fwnode(pdev->dev.parent),
"rohm,vout1-en", GPIOD_OUT_LOW,
"vout1-en");
/* VOUT1_OPS gpio ctrl */
/*
* Regulator core prioritizes the ena_gpio over
* enable/disable/is_enabled callbacks so no need to clear them
* even if GPIO is used. So, we can still use same ops.
*
* In theory it is possible someone wants to set vout1-en LOW
* during OTP loading and set VOUT1 to be controlled by GPIO -
* but control the GPIO from some where else than this driver.
* For that to work we should unset the is_enabled callback
* here.
*
* I believe such case where rohm,vout1-en-low is set and
* vout1-en-gpios is not is likely to be a misconfiguration.
* So let's just err out for now.
*/
if (!IS_ERR(en))
config.ena_gpiod = en;
else
return dev_err_probe(&pdev->dev, PTR_ERR(en),
"Failed to get VOUT1 control GPIO\n");
}
/*
* If more than one PMIC needs to be controlled by same processor then
* allocate the regulator data array here and use bd9576_regulators as
* template. At the moment I see no such use-case so I spare some
* bytes and use bd9576_regulators directly for non-constant configs
* like DDR voltage selection.
*/
platform_set_drvdata(pdev, ic_data);
ddr_sel = device_property_read_bool(pdev->dev.parent,
"rohm,ddr-sel-low");
if (ddr_sel)
ic_data->regulator_data[2].desc.fixed_uV = 1350000;
else
ic_data->regulator_data[2].desc.fixed_uV = 1500000;
switch (chip) {
case ROHM_CHIP_TYPE_BD9576:
may_have_irqs = true;
dev_dbg(&pdev->dev, "Found BD9576MUF\n");
break;
case ROHM_CHIP_TYPE_BD9573:
dev_dbg(&pdev->dev, "Found BD9573MUF\n");
break;
default:
dev_err(&pdev->dev, "Unsupported chip type\n");
return -EINVAL;
}
for (i = 0; i < num_reg_data; i++) {
struct regulator_desc *d;
d = &ic_data->regulator_data[i].desc;
if (may_have_irqs) {
if (d->id >= ARRAY_SIZE(bd9576_ops_arr))
return -EINVAL;
d->ops = bd9576_ops_arr[d->id];
} else {
if (d->id >= ARRAY_SIZE(bd9573_ops_arr))
return -EINVAL;
d->ops = bd9573_ops_arr[d->id];
}
}
config.dev = pdev->dev.parent;
config.regmap = regmap;
config.driver_data = ic_data;
for (i = 0; i < num_reg_data; i++) {
struct bd957x_regulator_data *r = &ic_data->regulator_data[i];
const struct regulator_desc *desc = &r->desc;
r->rdev = devm_regulator_register(&pdev->dev, desc,
&config);
if (IS_ERR(r->rdev))
return dev_err_probe(&pdev->dev, PTR_ERR(r->rdev),
"failed to register %s regulator\n",
desc->name);
/*
* Clear the VOUT1 GPIO setting - rest of the regulators do not
* support GPIO control
*/
config.ena_gpiod = NULL;
if (!may_have_irqs)
continue;
rdevs[i] = r->rdev;
if (i < BD957X_VOUTS1)
ovd_devs[i] = r->rdev;
}
if (may_have_irqs) {
void *ret;
/*
* We can add both the possible error and warning flags here
* because the core uses these only for status clearing and
* if we use warnings - errors are always clear and the other
* way around. We can also add CURRENT flag for all regulators
* because it is never set if it is not supported. Same applies
* to setting UVD for VoutS1 - it is not accidentally cleared
* as it is never set.
*/
int uvd_errs = REGULATOR_ERROR_UNDER_VOLTAGE |
REGULATOR_ERROR_UNDER_VOLTAGE_WARN |
REGULATOR_ERROR_OVER_CURRENT |
REGULATOR_ERROR_OVER_CURRENT_WARN;
int ovd_errs = REGULATOR_ERROR_OVER_VOLTAGE_WARN |
REGULATOR_ERROR_REGULATION_OUT;
int temp_errs = REGULATOR_ERROR_OVER_TEMP |
REGULATOR_ERROR_OVER_TEMP_WARN;
int irq;
irq = platform_get_irq_byname(pdev, "bd9576-uvd");
/* Register notifiers - can fail if IRQ is not given */
ret = devm_regulator_irq_helper(&pdev->dev, &bd9576_notif_uvd,
irq, 0, uvd_errs, NULL,
&rdevs[0],
BD9576_NUM_REGULATORS);
if (IS_ERR(ret)) {
if (PTR_ERR(ret) == -EPROBE_DEFER)
return -EPROBE_DEFER;
dev_warn(&pdev->dev, "UVD disabled %pe\n", ret);
}
irq = platform_get_irq_byname(pdev, "bd9576-ovd");
ret = devm_regulator_irq_helper(&pdev->dev, &bd9576_notif_ovd,
irq, 0, ovd_errs, NULL,
&ovd_devs[0],
BD9576_NUM_OVD_REGULATORS);
if (IS_ERR(ret)) {
if (PTR_ERR(ret) == -EPROBE_DEFER)
return -EPROBE_DEFER;
dev_warn(&pdev->dev, "OVD disabled %pe\n", ret);
}
irq = platform_get_irq_byname(pdev, "bd9576-temp");
ret = devm_regulator_irq_helper(&pdev->dev, &bd9576_notif_temp,
irq, 0, temp_errs, NULL,
&rdevs[0],
BD9576_NUM_REGULATORS);
if (IS_ERR(ret)) {
if (PTR_ERR(ret) == -EPROBE_DEFER)
return -EPROBE_DEFER;
dev_warn(&pdev->dev, "Thermal warning disabled %pe\n",
ret);
}
}
return 0;
}
static const struct platform_device_id bd957x_pmic_id[] = {
{ "bd9573-regulator", ROHM_CHIP_TYPE_BD9573 },
{ "bd9576-regulator", ROHM_CHIP_TYPE_BD9576 },
{ },
};
MODULE_DEVICE_TABLE(platform, bd957x_pmic_id);
static struct platform_driver bd957x_regulator = {
.driver = {
.name = "bd957x-pmic",
},
.probe = bd957x_probe,
.id_table = bd957x_pmic_id,
};
module_platform_driver(bd957x_regulator);
MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
MODULE_DESCRIPTION("ROHM BD9576/BD9573 voltage regulator driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:bd957x-pmic");
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