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linux/drivers/regulator/slg51000-regulator.c
Mark Brown 0199f86661
Merge series "Support ROHM BD9576MUF and BD9573MUF PMICs" from Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>: 
Initial support for ROHM BD9576MUF and BD9573MUF PMICs.

These PMICs are primarily intended to be used to power the R-Car family
processors. BD9576MUF includes some additional safety features the
BD9573MUF does not have. This initial version of drivers does not
utilize these features and for now the SW behaviour is identical.

Please note that this version of drivers is only tested on BD9576MUF
but according to the data-sheets the relevant parts of registers should
be same so drivers should also work on BD9573MUF.

This patch series includes MFD, watchdog and regulator drivers with
basic functionality such as:

- Enabling and pinging the watchdog
- configuring watchog timeout / window from device-tree
- reading regulator states/voltages
- enabling/disabling VOUT1 (VD50) when control mode B is used.

This patch series does not bring interrupt support. BD9576MUF and BD9573MUF
are designed to keep the IRQ line low for whole duration of error
condition. IRQ can't be 'acked'. So proper IRQ support would require
some IRQ limiter implementation (delayed unmask?) in order to not hog
the CPU.

---

Matti Vaittinen (6):
  dt_bindings: mfd: Add ROHM BD9576MUF and BD9573MUF PMICs
  dt_bindings: regulator: Add ROHM BD9576MUF and BD9573MUF PMICs
  mfd: Support ROHM BD9576MUF and BD9573MUF
  wdt: Support wdt on ROHM BD9576MUF and BD9573MUF
  regulator: Support ROHM BD9576MUF and BD9573MUF
  MAINTAINERS: Add ROHM BD9576MUF and BD9573MUF drivers

 .../bindings/mfd/rohm,bd9576-pmic.yaml        | 129 +++++++
 .../regulator/rohm,bd9576-regulator.yaml      |  33 ++
 MAINTAINERS                                   |   4 +
 drivers/mfd/Kconfig                           |  11 +
 drivers/mfd/Makefile                          |   1 +
 drivers/mfd/rohm-bd9576.c                     | 130 +++++++
 drivers/regulator/Kconfig                     |  10 +
 drivers/regulator/Makefile                    |   1 +
 drivers/regulator/bd9576-regulator.c          | 337 ++++++++++++++++++
 drivers/watchdog/Kconfig                      |  13 +
 drivers/watchdog/Makefile                     |   1 +
 drivers/watchdog/bd9576_wdt.c                 | 295 +++++++++++++++
 include/linux/mfd/rohm-bd957x.h               |  61 ++++
 include/linux/mfd/rohm-generic.h              |   2 +
 14 files changed, 1028 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/rohm,bd9576-pmic.yaml
 create mode 100644 Documentation/devicetree/bindings/regulator/rohm,bd9576-regulator.yaml
 create mode 100644 drivers/mfd/rohm-bd9576.c
 create mode 100644 drivers/regulator/bd9576-regulator.c
 create mode 100644 drivers/watchdog/bd9576_wdt.c
 create mode 100644 include/linux/mfd/rohm-bd957x.h

base-commit: f4d51dffc6
--
2.21.0

--
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =]
2020-09-17 18:25:39 +01:00

517 lines
17 KiB
C
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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 gpio_desc *ena_gpiod;
ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np), "enable", 0,
GPIOD_OUT_LOW |
GPIOD_FLAGS_BIT_NONEXCLUSIVE,
"gpio-en-ldo");
if (!IS_ERR(ena_gpiod))
config->ena_gpiod = 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;
}
fallthrough; /* 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_notifier_call_chain(chip->rdev[i],
REGULATOR_EVENT_OVER_CURRENT, NULL);
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_notifier_call_chain(chip->rdev[i],
REGULATOR_EVENT_OVER_TEMP, NULL);
}
}
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)
{
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_new = 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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