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linux_dsm_epyc7002/drivers/regulator/slg51000-regulator.c
Dmitry Torokhov c0b913447b
regulator: slg51000: use devm_gpiod_get_optional() in probe 
The CS GPIO line is clearly optional GPIO (and marked as such in the
binding document) and we should handle it accordingly. The current code
treats all errors as meaning that there is no GPIO defined, which is
wrong, as it does not handle deferrals raised by the underlying code
properly, nor does it recognize non-existing GPIO from any other
initialization error.

As far as I can see the only reason the driver, unlike all others,
is using OF-specific devm_gpiod_get_from_of_node() so that it can
assign a custom label to the selected GPIO line. Given that noone else
needs that, it should not be doing that either.

Let's switch to using more appropriate devm_gpiod_get_optional().

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: https://lore.kernel.org/r/20190904214200.GA66118@dtor-ws
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-09-09 10:58:15 +01:00

525 lines
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// SPDX-License-Identifier: GPL-2.0+
//
// SLG51000 High PSRR, Multi-Output Regulators
// Copyright (C) 2019 Dialog Semiconductor
//
// Author: Eric Jeong <eric.jeong.opensource@diasemi.com>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include "slg51000-regulator.h"
#define SLG51000_SCTL_EVT 7
#define SLG51000_MAX_EVT_REGISTER 8
#define SLG51000_LDOHP_LV_MIN 1200000
#define SLG51000_LDOHP_HV_MIN 2400000
enum slg51000_regulators {
SLG51000_REGULATOR_LDO1 = 0,
SLG51000_REGULATOR_LDO2,
SLG51000_REGULATOR_LDO3,
SLG51000_REGULATOR_LDO4,
SLG51000_REGULATOR_LDO5,
SLG51000_REGULATOR_LDO6,
SLG51000_REGULATOR_LDO7,
SLG51000_MAX_REGULATORS,
};
struct slg51000 {
struct device *dev;
struct regmap *regmap;
struct regulator_desc *rdesc[SLG51000_MAX_REGULATORS];
struct regulator_dev *rdev[SLG51000_MAX_REGULATORS];
struct gpio_desc *cs_gpiod;
int chip_irq;
};
struct slg51000_evt_sta {
unsigned int ereg;
unsigned int sreg;
};
static const struct slg51000_evt_sta es_reg[SLG51000_MAX_EVT_REGISTER] = {
{SLG51000_LDO1_EVENT, SLG51000_LDO1_STATUS},
{SLG51000_LDO2_EVENT, SLG51000_LDO2_STATUS},
{SLG51000_LDO3_EVENT, SLG51000_LDO3_STATUS},
{SLG51000_LDO4_EVENT, SLG51000_LDO4_STATUS},
{SLG51000_LDO5_EVENT, SLG51000_LDO5_STATUS},
{SLG51000_LDO6_EVENT, SLG51000_LDO6_STATUS},
{SLG51000_LDO7_EVENT, SLG51000_LDO7_STATUS},
{SLG51000_SYSCTL_EVENT, SLG51000_SYSCTL_STATUS},
};
static const struct regmap_range slg51000_writeable_ranges[] = {
regmap_reg_range(SLG51000_SYSCTL_MATRIX_CONF_A,
SLG51000_SYSCTL_MATRIX_CONF_A),
regmap_reg_range(SLG51000_LDO1_VSEL, SLG51000_LDO1_VSEL),
regmap_reg_range(SLG51000_LDO1_MINV, SLG51000_LDO1_MAXV),
regmap_reg_range(SLG51000_LDO1_IRQ_MASK, SLG51000_LDO1_IRQ_MASK),
regmap_reg_range(SLG51000_LDO2_VSEL, SLG51000_LDO2_VSEL),
regmap_reg_range(SLG51000_LDO2_MINV, SLG51000_LDO2_MAXV),
regmap_reg_range(SLG51000_LDO2_IRQ_MASK, SLG51000_LDO2_IRQ_MASK),
regmap_reg_range(SLG51000_LDO3_VSEL, SLG51000_LDO3_VSEL),
regmap_reg_range(SLG51000_LDO3_MINV, SLG51000_LDO3_MAXV),
regmap_reg_range(SLG51000_LDO3_IRQ_MASK, SLG51000_LDO3_IRQ_MASK),
regmap_reg_range(SLG51000_LDO4_VSEL, SLG51000_LDO4_VSEL),
regmap_reg_range(SLG51000_LDO4_MINV, SLG51000_LDO4_MAXV),
regmap_reg_range(SLG51000_LDO4_IRQ_MASK, SLG51000_LDO4_IRQ_MASK),
regmap_reg_range(SLG51000_LDO5_VSEL, SLG51000_LDO5_VSEL),
regmap_reg_range(SLG51000_LDO5_MINV, SLG51000_LDO5_MAXV),
regmap_reg_range(SLG51000_LDO5_IRQ_MASK, SLG51000_LDO5_IRQ_MASK),
regmap_reg_range(SLG51000_LDO6_VSEL, SLG51000_LDO6_VSEL),
regmap_reg_range(SLG51000_LDO6_MINV, SLG51000_LDO6_MAXV),
regmap_reg_range(SLG51000_LDO6_IRQ_MASK, SLG51000_LDO6_IRQ_MASK),
regmap_reg_range(SLG51000_LDO7_VSEL, SLG51000_LDO7_VSEL),
regmap_reg_range(SLG51000_LDO7_MINV, SLG51000_LDO7_MAXV),
regmap_reg_range(SLG51000_LDO7_IRQ_MASK, SLG51000_LDO7_IRQ_MASK),
regmap_reg_range(SLG51000_OTP_IRQ_MASK, SLG51000_OTP_IRQ_MASK),
};
static const struct regmap_range slg51000_readable_ranges[] = {
regmap_reg_range(SLG51000_SYSCTL_PATN_ID_B0,
SLG51000_SYSCTL_PATN_ID_B2),
regmap_reg_range(SLG51000_SYSCTL_SYS_CONF_A,
SLG51000_SYSCTL_SYS_CONF_A),
regmap_reg_range(SLG51000_SYSCTL_SYS_CONF_D,
SLG51000_SYSCTL_MATRIX_CONF_B),
regmap_reg_range(SLG51000_SYSCTL_REFGEN_CONF_C,
SLG51000_SYSCTL_UVLO_CONF_A),
regmap_reg_range(SLG51000_SYSCTL_FAULT_LOG1, SLG51000_SYSCTL_IRQ_MASK),
regmap_reg_range(SLG51000_IO_GPIO1_CONF, SLG51000_IO_GPIO_STATUS),
regmap_reg_range(SLG51000_LUTARRAY_LUT_VAL_0,
SLG51000_LUTARRAY_LUT_VAL_11),
regmap_reg_range(SLG51000_MUXARRAY_INPUT_SEL_0,
SLG51000_MUXARRAY_INPUT_SEL_63),
regmap_reg_range(SLG51000_PWRSEQ_RESOURCE_EN_0,
SLG51000_PWRSEQ_INPUT_SENSE_CONF_B),
regmap_reg_range(SLG51000_LDO1_VSEL, SLG51000_LDO1_VSEL),
regmap_reg_range(SLG51000_LDO1_MINV, SLG51000_LDO1_MAXV),
regmap_reg_range(SLG51000_LDO1_MISC1, SLG51000_LDO1_VSEL_ACTUAL),
regmap_reg_range(SLG51000_LDO1_EVENT, SLG51000_LDO1_IRQ_MASK),
regmap_reg_range(SLG51000_LDO2_VSEL, SLG51000_LDO2_VSEL),
regmap_reg_range(SLG51000_LDO2_MINV, SLG51000_LDO2_MAXV),
regmap_reg_range(SLG51000_LDO2_MISC1, SLG51000_LDO2_VSEL_ACTUAL),
regmap_reg_range(SLG51000_LDO2_EVENT, SLG51000_LDO2_IRQ_MASK),
regmap_reg_range(SLG51000_LDO3_VSEL, SLG51000_LDO3_VSEL),
regmap_reg_range(SLG51000_LDO3_MINV, SLG51000_LDO3_MAXV),
regmap_reg_range(SLG51000_LDO3_CONF1, SLG51000_LDO3_VSEL_ACTUAL),
regmap_reg_range(SLG51000_LDO3_EVENT, SLG51000_LDO3_IRQ_MASK),
regmap_reg_range(SLG51000_LDO4_VSEL, SLG51000_LDO4_VSEL),
regmap_reg_range(SLG51000_LDO4_MINV, SLG51000_LDO4_MAXV),
regmap_reg_range(SLG51000_LDO4_CONF1, SLG51000_LDO4_VSEL_ACTUAL),
regmap_reg_range(SLG51000_LDO4_EVENT, SLG51000_LDO4_IRQ_MASK),
regmap_reg_range(SLG51000_LDO5_VSEL, SLG51000_LDO5_VSEL),
regmap_reg_range(SLG51000_LDO5_MINV, SLG51000_LDO5_MAXV),
regmap_reg_range(SLG51000_LDO5_TRIM2, SLG51000_LDO5_TRIM2),
regmap_reg_range(SLG51000_LDO5_CONF1, SLG51000_LDO5_VSEL_ACTUAL),
regmap_reg_range(SLG51000_LDO5_EVENT, SLG51000_LDO5_IRQ_MASK),
regmap_reg_range(SLG51000_LDO6_VSEL, SLG51000_LDO6_VSEL),
regmap_reg_range(SLG51000_LDO6_MINV, SLG51000_LDO6_MAXV),
regmap_reg_range(SLG51000_LDO6_TRIM2, SLG51000_LDO6_TRIM2),
regmap_reg_range(SLG51000_LDO6_CONF1, SLG51000_LDO6_VSEL_ACTUAL),
regmap_reg_range(SLG51000_LDO6_EVENT, SLG51000_LDO6_IRQ_MASK),
regmap_reg_range(SLG51000_LDO7_VSEL, SLG51000_LDO7_VSEL),
regmap_reg_range(SLG51000_LDO7_MINV, SLG51000_LDO7_MAXV),
regmap_reg_range(SLG51000_LDO7_CONF1, SLG51000_LDO7_VSEL_ACTUAL),
regmap_reg_range(SLG51000_LDO7_EVENT, SLG51000_LDO7_IRQ_MASK),
regmap_reg_range(SLG51000_OTP_EVENT, SLG51000_OTP_EVENT),
regmap_reg_range(SLG51000_OTP_IRQ_MASK, SLG51000_OTP_IRQ_MASK),
regmap_reg_range(SLG51000_OTP_LOCK_OTP_PROG, SLG51000_OTP_LOCK_CTRL),
regmap_reg_range(SLG51000_LOCK_GLOBAL_LOCK_CTRL1,
SLG51000_LOCK_GLOBAL_LOCK_CTRL1),
};
static const struct regmap_range slg51000_volatile_ranges[] = {
regmap_reg_range(SLG51000_SYSCTL_FAULT_LOG1, SLG51000_SYSCTL_STATUS),
regmap_reg_range(SLG51000_IO_GPIO_STATUS, SLG51000_IO_GPIO_STATUS),
regmap_reg_range(SLG51000_LDO1_EVENT, SLG51000_LDO1_STATUS),
regmap_reg_range(SLG51000_LDO2_EVENT, SLG51000_LDO2_STATUS),
regmap_reg_range(SLG51000_LDO3_EVENT, SLG51000_LDO3_STATUS),
regmap_reg_range(SLG51000_LDO4_EVENT, SLG51000_LDO4_STATUS),
regmap_reg_range(SLG51000_LDO5_EVENT, SLG51000_LDO5_STATUS),
regmap_reg_range(SLG51000_LDO6_EVENT, SLG51000_LDO6_STATUS),
regmap_reg_range(SLG51000_LDO7_EVENT, SLG51000_LDO7_STATUS),
regmap_reg_range(SLG51000_OTP_EVENT, SLG51000_OTP_EVENT),
};
static const struct regmap_access_table slg51000_writeable_table = {
.yes_ranges = slg51000_writeable_ranges,
.n_yes_ranges = ARRAY_SIZE(slg51000_writeable_ranges),
};
static const struct regmap_access_table slg51000_readable_table = {
.yes_ranges = slg51000_readable_ranges,
.n_yes_ranges = ARRAY_SIZE(slg51000_readable_ranges),
};
static const struct regmap_access_table slg51000_volatile_table = {
.yes_ranges = slg51000_volatile_ranges,
.n_yes_ranges = ARRAY_SIZE(slg51000_volatile_ranges),
};
static const struct regmap_config slg51000_regmap_config = {
.reg_bits = 16,
.val_bits = 8,
.max_register = 0x8000,
.wr_table = &slg51000_writeable_table,
.rd_table = &slg51000_readable_table,
.volatile_table = &slg51000_volatile_table,
};
static const struct regulator_ops slg51000_regl_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
};
static const struct regulator_ops slg51000_switch_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
};
static int slg51000_of_parse_cb(struct device_node *np,
const struct regulator_desc *desc,
struct regulator_config *config)
{
struct slg51000 *chip = config->driver_data;
struct gpio_desc *ena_gpiod;
enum gpiod_flags gflags = GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE;
ena_gpiod = devm_gpiod_get_from_of_node(chip->dev, np,
"enable-gpios", 0,
gflags, "gpio-en-ldo");
if (!IS_ERR(ena_gpiod)) {
config->ena_gpiod = ena_gpiod;
devm_gpiod_unhinge(chip->dev, config->ena_gpiod);
}
return 0;
}
#define SLG51000_REGL_DESC(_id, _name, _s_name, _min, _step) \
[SLG51000_REGULATOR_##_id] = { \
.name = #_name, \
.supply_name = _s_name, \
.id = SLG51000_REGULATOR_##_id, \
.of_match = of_match_ptr(#_name), \
.of_parse_cb = slg51000_of_parse_cb, \
.ops = &slg51000_regl_ops, \
.regulators_node = of_match_ptr("regulators"), \
.n_voltages = 256, \
.min_uV = _min, \
.uV_step = _step, \
.linear_min_sel = 0, \
.vsel_mask = SLG51000_VSEL_MASK, \
.vsel_reg = SLG51000_##_id##_VSEL, \
.enable_reg = SLG51000_SYSCTL_MATRIX_CONF_A, \
.enable_mask = BIT(SLG51000_REGULATOR_##_id), \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}
static struct regulator_desc regls_desc[SLG51000_MAX_REGULATORS] = {
SLG51000_REGL_DESC(LDO1, ldo1, NULL, 2400000, 5000),
SLG51000_REGL_DESC(LDO2, ldo2, NULL, 2400000, 5000),
SLG51000_REGL_DESC(LDO3, ldo3, "vin3", 1200000, 10000),
SLG51000_REGL_DESC(LDO4, ldo4, "vin4", 1200000, 10000),
SLG51000_REGL_DESC(LDO5, ldo5, "vin5", 400000, 5000),
SLG51000_REGL_DESC(LDO6, ldo6, "vin6", 400000, 5000),
SLG51000_REGL_DESC(LDO7, ldo7, "vin7", 1200000, 10000),
};
static int slg51000_regulator_init(struct slg51000 *chip)
{
struct regulator_config config = { };
struct regulator_desc *rdesc;
unsigned int reg, val;
u8 vsel_range[2];
int id, ret = 0;
const unsigned int min_regs[SLG51000_MAX_REGULATORS] = {
SLG51000_LDO1_MINV, SLG51000_LDO2_MINV, SLG51000_LDO3_MINV,
SLG51000_LDO4_MINV, SLG51000_LDO5_MINV, SLG51000_LDO6_MINV,
SLG51000_LDO7_MINV,
};
for (id = 0; id < SLG51000_MAX_REGULATORS; id++) {
chip->rdesc[id] = &regls_desc[id];
rdesc = chip->rdesc[id];
config.regmap = chip->regmap;
config.dev = chip->dev;
config.driver_data = chip;
ret = regmap_bulk_read(chip->regmap, min_regs[id],
vsel_range, 2);
if (ret < 0) {
dev_err(chip->dev,
"Failed to read the MIN register\n");
return ret;
}
switch (id) {
case SLG51000_REGULATOR_LDO1:
case SLG51000_REGULATOR_LDO2:
if (id == SLG51000_REGULATOR_LDO1)
reg = SLG51000_LDO1_MISC1;
else
reg = SLG51000_LDO2_MISC1;
ret = regmap_read(chip->regmap, reg, &val);
if (ret < 0) {
dev_err(chip->dev,
"Failed to read voltage range of ldo%d\n",
id + 1);
return ret;
}
rdesc->linear_min_sel = vsel_range[0];
rdesc->n_voltages = vsel_range[1] + 1;
if (val & SLG51000_SEL_VRANGE_MASK)
rdesc->min_uV = SLG51000_LDOHP_HV_MIN
+ (vsel_range[0]
* rdesc->uV_step);
else
rdesc->min_uV = SLG51000_LDOHP_LV_MIN
+ (vsel_range[0]
* rdesc->uV_step);
break;
case SLG51000_REGULATOR_LDO5:
case SLG51000_REGULATOR_LDO6:
if (id == SLG51000_REGULATOR_LDO5)
reg = SLG51000_LDO5_TRIM2;
else
reg = SLG51000_LDO6_TRIM2;
ret = regmap_read(chip->regmap, reg, &val);
if (ret < 0) {
dev_err(chip->dev,
"Failed to read LDO mode register\n");
return ret;
}
if (val & SLG51000_SEL_BYP_MODE_MASK) {
rdesc->ops = &slg51000_switch_ops;
rdesc->n_voltages = 0;
rdesc->min_uV = 0;
rdesc->uV_step = 0;
rdesc->linear_min_sel = 0;
break;
}
/* Fall through - to the check below.*/
default:
rdesc->linear_min_sel = vsel_range[0];
rdesc->n_voltages = vsel_range[1] + 1;
rdesc->min_uV = rdesc->min_uV
+ (vsel_range[0] * rdesc->uV_step);
break;
}
chip->rdev[id] = devm_regulator_register(chip->dev, rdesc,
&config);
if (IS_ERR(chip->rdev[id])) {
ret = PTR_ERR(chip->rdev[id]);
dev_err(chip->dev,
"Failed to register regulator(%s):%d\n",
chip->rdesc[id]->name, ret);
return ret;
}
}
return 0;
}
static irqreturn_t slg51000_irq_handler(int irq, void *data)
{
struct slg51000 *chip = data;
struct regmap *regmap = chip->regmap;
enum { R0 = 0, R1, R2, REG_MAX };
u8 evt[SLG51000_MAX_EVT_REGISTER][REG_MAX];
int ret, i, handled = IRQ_NONE;
unsigned int evt_otp, mask_otp;
/* Read event[R0], status[R1] and mask[R2] register */
for (i = 0; i < SLG51000_MAX_EVT_REGISTER; i++) {
ret = regmap_bulk_read(regmap, es_reg[i].ereg, evt[i], REG_MAX);
if (ret < 0) {
dev_err(chip->dev,
"Failed to read event registers(%d)\n", ret);
return IRQ_NONE;
}
}
ret = regmap_read(regmap, SLG51000_OTP_EVENT, &evt_otp);
if (ret < 0) {
dev_err(chip->dev,
"Failed to read otp event registers(%d)\n", ret);
return IRQ_NONE;
}
ret = regmap_read(regmap, SLG51000_OTP_IRQ_MASK, &mask_otp);
if (ret < 0) {
dev_err(chip->dev,
"Failed to read otp mask register(%d)\n", ret);
return IRQ_NONE;
}
if ((evt_otp & SLG51000_EVT_CRC_MASK) &&
!(mask_otp & SLG51000_IRQ_CRC_MASK)) {
dev_info(chip->dev,
"OTP has been read or OTP crc is not zero\n");
handled = IRQ_HANDLED;
}
for (i = 0; i < SLG51000_MAX_REGULATORS; i++) {
if (!(evt[i][R2] & SLG51000_IRQ_ILIM_FLAG_MASK) &&
(evt[i][R0] & SLG51000_EVT_ILIM_FLAG_MASK)) {
regulator_lock(chip->rdev[i]);
regulator_notifier_call_chain(chip->rdev[i],
REGULATOR_EVENT_OVER_CURRENT, NULL);
regulator_unlock(chip->rdev[i]);
if (evt[i][R1] & SLG51000_STA_ILIM_FLAG_MASK)
dev_warn(chip->dev,
"Over-current limit(ldo%d)\n", i + 1);
handled = IRQ_HANDLED;
}
}
if (!(evt[SLG51000_SCTL_EVT][R2] & SLG51000_IRQ_HIGH_TEMP_WARN_MASK) &&
(evt[SLG51000_SCTL_EVT][R0] & SLG51000_EVT_HIGH_TEMP_WARN_MASK)) {
for (i = 0; i < SLG51000_MAX_REGULATORS; i++) {
if (!(evt[i][R1] & SLG51000_STA_ILIM_FLAG_MASK) &&
(evt[i][R1] & SLG51000_STA_VOUT_OK_FLAG_MASK)) {
regulator_lock(chip->rdev[i]);
regulator_notifier_call_chain(chip->rdev[i],
REGULATOR_EVENT_OVER_TEMP, NULL);
regulator_unlock(chip->rdev[i]);
}
}
handled = IRQ_HANDLED;
if (evt[SLG51000_SCTL_EVT][R1] &
SLG51000_STA_HIGH_TEMP_WARN_MASK)
dev_warn(chip->dev, "High temperature warning!\n");
}
return handled;
}
static void slg51000_clear_fault_log(struct slg51000 *chip)
{
unsigned int val = 0;
int ret = 0;
ret = regmap_read(chip->regmap, SLG51000_SYSCTL_FAULT_LOG1, &val);
if (ret < 0) {
dev_err(chip->dev, "Failed to read Fault log register\n");
return;
}
if (val & SLG51000_FLT_OVER_TEMP_MASK)
dev_dbg(chip->dev, "Fault log: FLT_OVER_TEMP\n");
if (val & SLG51000_FLT_POWER_SEQ_CRASH_REQ_MASK)
dev_dbg(chip->dev, "Fault log: FLT_POWER_SEQ_CRASH_REQ\n");
if (val & SLG51000_FLT_RST_MASK)
dev_dbg(chip->dev, "Fault log: FLT_RST\n");
if (val & SLG51000_FLT_POR_MASK)
dev_dbg(chip->dev, "Fault log: FLT_POR\n");
}
static int slg51000_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct slg51000 *chip;
struct gpio_desc *cs_gpiod;
int error, ret;
chip = devm_kzalloc(dev, sizeof(struct slg51000), GFP_KERNEL);
if (!chip)
return -ENOMEM;
cs_gpiod = devm_gpiod_get_optional(dev, "dlg,cs",
GPIOD_OUT_HIGH |
GPIOD_FLAGS_BIT_NONEXCLUSIVE);
if (IS_ERR(cs_gpiod))
return PTR_ERR(cs_gpiod);
if (cs_gpiod) {
dev_info(dev, "Found chip selector property\n");
chip->cs_gpiod = cs_gpiod;
}
i2c_set_clientdata(client, chip);
chip->chip_irq = client->irq;
chip->dev = dev;
chip->regmap = devm_regmap_init_i2c(client, &slg51000_regmap_config);
if (IS_ERR(chip->regmap)) {
error = PTR_ERR(chip->regmap);
dev_err(dev, "Failed to allocate register map: %d\n",
error);
return error;
}
ret = slg51000_regulator_init(chip);
if (ret < 0) {
dev_err(chip->dev, "Failed to init regulator(%d)\n", ret);
return ret;
}
slg51000_clear_fault_log(chip);
if (chip->chip_irq) {
ret = devm_request_threaded_irq(dev, chip->chip_irq, NULL,
slg51000_irq_handler,
(IRQF_TRIGGER_HIGH |
IRQF_ONESHOT),
"slg51000-irq", chip);
if (ret != 0) {
dev_err(dev, "Failed to request IRQ: %d\n",
chip->chip_irq);
return ret;
}
} else {
dev_info(dev, "No IRQ configured\n");
}
return ret;
}
static const struct i2c_device_id slg51000_i2c_id[] = {
{"slg51000", 0},
{},
};
MODULE_DEVICE_TABLE(i2c, slg51000_i2c_id);
static struct i2c_driver slg51000_regulator_driver = {
.driver = {
.name = "slg51000-regulator",
},
.probe = slg51000_i2c_probe,
.id_table = slg51000_i2c_id,
};
module_i2c_driver(slg51000_regulator_driver);
MODULE_AUTHOR("Eric Jeong <eric.jeong.opensource@diasemi.com>");
MODULE_DESCRIPTION("SLG51000 regulator driver");
MODULE_LICENSE("GPL");
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