Orange Pi5 kernel

// 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");