| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Mario Kicherer | 1022 | 100.00% | 1 | 100.00% |
| Total | 1022 | 1 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * An hwmon driver for the NXP MC34VR500 PMIC * * Author: Mario Kicherer <dev@kicherer.org> */ #include <linux/bits.h> #include <linux/dev_printk.h> #include <linux/device.h> #include <linux/err.h> #include <linux/errno.h> #include <linux/hwmon.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/irqreturn.h> #include <linux/module.h> #include <linux/of.h> #include <linux/regmap.h> #define MC34VR500_I2C_ADDR 0x08 #define MC34VR500_DEVICEID_VALUE 0x14 /* INTSENSE0 */ #define ENS_BIT BIT(0) #define LOWVINS_BIT BIT(1) #define THERM110S_BIT BIT(2) #define THERM120S_BIT BIT(3) #define THERM125S_BIT BIT(4) #define THERM130S_BIT BIT(5) #define MC34VR500_DEVICEID 0x00 #define MC34VR500_SILICONREVID 0x03 #define MC34VR500_FABID 0x04 #define MC34VR500_INTSTAT0 0x05 #define MC34VR500_INTMASK0 0x06 #define MC34VR500_INTSENSE0 0x07 struct mc34vr500_data { struct device *hwmon_dev; struct regmap *regmap; }; static irqreturn_t mc34vr500_process_interrupt(int irq, void *userdata) { struct mc34vr500_data *data = (struct mc34vr500_data *)userdata; unsigned int reg; int ret; ret = regmap_read(data->regmap, MC34VR500_INTSTAT0, ®); if (ret < 0) return IRQ_HANDLED; if (reg) { if (reg & LOWVINS_BIT) hwmon_notify_event(data->hwmon_dev, hwmon_in, hwmon_in_min_alarm, 0); if (reg & THERM110S_BIT) hwmon_notify_event(data->hwmon_dev, hwmon_temp, hwmon_temp_max_alarm, 0); if (reg & THERM120S_BIT) hwmon_notify_event(data->hwmon_dev, hwmon_temp, hwmon_temp_crit_alarm, 0); if (reg & THERM130S_BIT) hwmon_notify_event(data->hwmon_dev, hwmon_temp, hwmon_temp_emergency_alarm, 0); /* write 1 to clear */ regmap_write(data->regmap, MC34VR500_INTSTAT0, LOWVINS_BIT | THERM110S_BIT | THERM120S_BIT | THERM130S_BIT); } return IRQ_HANDLED; } static umode_t mc34vr500_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr, int channel) { switch (attr) { case hwmon_in_min_alarm: case hwmon_temp_max_alarm: case hwmon_temp_crit_alarm: case hwmon_temp_emergency_alarm: return 0444; default: break; } return 0; } static int mc34vr500_alarm_read(struct mc34vr500_data *data, int index, long *val) { unsigned int reg; int ret; ret = regmap_read(data->regmap, MC34VR500_INTSENSE0, ®); if (ret < 0) return ret; *val = !!(reg & index); return 0; } static int mc34vr500_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { struct mc34vr500_data *data = dev_get_drvdata(dev); switch (type) { case hwmon_in: switch (attr) { case hwmon_in_min_alarm: return mc34vr500_alarm_read(data, LOWVINS_BIT, val); default: return -EOPNOTSUPP; } case hwmon_temp: switch (attr) { case hwmon_temp_max_alarm: return mc34vr500_alarm_read(data, THERM110S_BIT, val); case hwmon_temp_crit_alarm: return mc34vr500_alarm_read(data, THERM120S_BIT, val); case hwmon_temp_emergency_alarm: return mc34vr500_alarm_read(data, THERM130S_BIT, val); default: return -EOPNOTSUPP; } default: return -EOPNOTSUPP; } } static const struct hwmon_channel_info *mc34vr500_info[] = { HWMON_CHANNEL_INFO(in, HWMON_I_MIN_ALARM), HWMON_CHANNEL_INFO(temp, HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_EMERGENCY_ALARM), NULL, }; static const struct hwmon_ops mc34vr500_hwmon_ops = { .is_visible = mc34vr500_is_visible, .read = mc34vr500_read, }; static const struct hwmon_chip_info mc34vr500_chip_info = { .ops = &mc34vr500_hwmon_ops, .info = mc34vr500_info, }; static const struct regmap_config mc34vr500_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = MC34VR500_INTSENSE0, }; static int mc34vr500_probe(struct i2c_client *client) { struct device *dev = &client->dev; struct mc34vr500_data *data; struct device *hwmon_dev; int ret; unsigned int reg, revid, fabid; struct regmap *regmap; regmap = devm_regmap_init_i2c(client, &mc34vr500_regmap_config); if (IS_ERR(regmap)) return PTR_ERR(regmap); data = devm_kzalloc(dev, sizeof(struct mc34vr500_data), GFP_KERNEL); if (!data) return -ENOMEM; data->regmap = regmap; ret = regmap_read(regmap, MC34VR500_DEVICEID, ®); if (ret < 0) return ret; if (reg != MC34VR500_DEVICEID_VALUE) return -ENODEV; ret = regmap_read(regmap, MC34VR500_SILICONREVID, &revid); if (ret < 0) return ret; ret = regmap_read(regmap, MC34VR500_FABID, &fabid); if (ret < 0) return ret; dev_dbg(dev, "mc34vr500: revid 0x%x fabid 0x%x\n", revid, fabid); hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, data, &mc34vr500_chip_info, NULL); if (IS_ERR(hwmon_dev)) return PTR_ERR(hwmon_dev); data->hwmon_dev = hwmon_dev; if (client->irq) { ret = devm_request_threaded_irq(dev, client->irq, NULL, mc34vr500_process_interrupt, IRQF_TRIGGER_RISING | IRQF_ONESHOT | IRQF_SHARED, dev_name(dev), data); if (ret) return ret; /* write 1 to clear interrupts */ ret = regmap_write(regmap, MC34VR500_INTSTAT0, LOWVINS_BIT | THERM110S_BIT | THERM120S_BIT | THERM130S_BIT); if (ret) return ret; /* unmask interrupts */ ret = regmap_write(regmap, MC34VR500_INTMASK0, (unsigned int) ~(LOWVINS_BIT | THERM110S_BIT | THERM120S_BIT | THERM130S_BIT)); if (ret) return ret; } return 0; } static const struct i2c_device_id mc34vr500_id[] = { { "mc34vr500", 0 }, { }, }; MODULE_DEVICE_TABLE(i2c, mc34vr500_id); static const struct of_device_id __maybe_unused mc34vr500_of_match[] = { { .compatible = "nxp,mc34vr500" }, { }, }; MODULE_DEVICE_TABLE(of, mc34vr500_of_match); static struct i2c_driver mc34vr500_driver = { .driver = { .name = "mc34vr500", .of_match_table = of_match_ptr(mc34vr500_of_match), }, .probe_new = mc34vr500_probe, .id_table = mc34vr500_id, }; module_i2c_driver(mc34vr500_driver); MODULE_AUTHOR("Mario Kicherer <dev@kicherer.org>"); MODULE_DESCRIPTION("MC34VR500 driver"); MODULE_LICENSE("GPL");
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