From: Linus Torvalds Date: Wed, 5 Oct 2022 02:02:54 +0000 (-0700) Subject: Merge tag 'hwmon-for-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck... X-Git-Tag: v6.1-rc5~317 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0baf6dcc02c130a69fb21088ec31a0ba7a896f22;p=platform%2Fkernel%2Flinux-starfive.git Merge tag 'hwmon-for-v6.1' of git://git./linux/kernel/git/groeck/linux-staging Pull hwmon updates from Guenter Roeck: "New drivers: - Driver for MAX31760 fan speed controller - Driver for TEXAS TPS546D24 Buck Converter - Driver for EMC2301/2/3/5 RPM-based PWM Fan Speed Controller Removed drivers: - Drop obsolete asus_wmi_ec_sensors driver Cleanups, affecting various drivers: - Use DEFINE_SIMPLE_DEV_PM_OPS where appropriate - Remove forward declarations - Move from strlcpy with unused retval to strscpy - Make use of devm_clk_get_enabled() - Drop devm_of_pwm_get() Other notable cleanup and improvements: - Support for additional USB devide ID and support for reporting of rail mode via debugfs added to corsair-psu driver - Support for aditional USB ID in nzxt-smart2 driver - Support for Aquacomputer High Flow Next in aquacomputer_d5next driver - Major cleanup of pwm-fan driver - Major cleanup of mr75203 driver, and added support for new device revision And various other minor fixes and cleanups" * tag 'hwmon-for-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (86 commits) hwmon: (corsair-psu) add USB id of new revision of the HX1000i psu hwmon: (pmbus/mp2888) Fix sensors readouts for MPS Multi-phase mp2888 controller dt-bindings: hwmon: sensirion,shtc1: Clean up spelling mistakes and grammar hwmon: (nct6683) remove unused variable in nct6683_create_attr_group hwmon: w83627hf: Reorder symbols to get rid of a few forward declarations hwmon: (ina3221) Use DEFINE_RUNTIME_DEV_PM_OPS() and pm_ptr() hwmon: (w83627ehf) Switch to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() hwmon: (tmp108) Switch to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() hwmon: (tmp103) Switch to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() hwmon: (tmp102) Switch to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() hwmon: (pwm-fan) Switch to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() hwmon: (nct6775) Switch to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() hwmon: (max6639) Switch to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() hwmon: (max31730) witch to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() hwmon: (max31722) Switch to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() hwmon: (ltc2947) Switch to EXPORT_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() hwmon: (lm90) Switch to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() hwmon: (it87) Switch to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() hwmon: (gpio-fan) Switch to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() hwmon: (adt7x10) Switch to EXPORT_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() ... --- 0baf6dcc02c130a69fb21088ec31a0ba7a896f22 diff --cc drivers/hwmon/emc2305.c index 0000000,bb32172..aa1f25a mode 000000,100644..100644 --- a/drivers/hwmon/emc2305.c +++ b/drivers/hwmon/emc2305.c @@@ -1,0 -1,621 +1,620 @@@ + // SPDX-License-Identifier: GPL-2.0+ + /* + * Hardware monitoring driver for EMC2305 fan controller + * + * Copyright (C) 2022 Nvidia Technologies Ltd. + */ + + #include + #include + #include + #include + #include + #include + + static const unsigned short + emc2305_normal_i2c[] = { 0x27, 0x2c, 0x2d, 0x2e, 0x2f, 0x4c, 0x4d, I2C_CLIENT_END }; + + #define EMC2305_REG_DRIVE_FAIL_STATUS 0x27 + #define EMC2305_REG_DEVICE 0xfd + #define EMC2305_REG_VENDOR 0xfe + #define EMC2305_FAN_MAX 0xff + #define EMC2305_FAN_MIN 0x00 + #define EMC2305_FAN_MAX_STATE 10 + #define EMC2305_DEVICE 0x34 + #define EMC2305_VENDOR 0x5d + #define EMC2305_REG_PRODUCT_ID 0xfd + #define EMC2305_TACH_REGS_UNUSE_BITS 3 + #define EMC2305_TACH_CNT_MULTIPLIER 0x02 + #define EMC2305_TACH_RANGE_MIN 480 + + #define EMC2305_PWM_DUTY2STATE(duty, max_state, pwm_max) \ + DIV_ROUND_CLOSEST((duty) * (max_state), (pwm_max)) + #define EMC2305_PWM_STATE2DUTY(state, max_state, pwm_max) \ + DIV_ROUND_CLOSEST((state) * (pwm_max), (max_state)) + + /* + * Factor by equations [2] and [3] from data sheet; valid for fans where the number of edges + * equal (poles * 2 + 1). + */ + #define EMC2305_RPM_FACTOR 3932160 + + #define EMC2305_REG_FAN_DRIVE(n) (0x30 + 0x10 * (n)) + #define EMC2305_REG_FAN_MIN_DRIVE(n) (0x38 + 0x10 * (n)) + #define EMC2305_REG_FAN_TACH(n) (0x3e + 0x10 * (n)) + + enum emc230x_product_id { + EMC2305 = 0x34, + EMC2303 = 0x35, + EMC2302 = 0x36, + EMC2301 = 0x37, + }; + + static const struct i2c_device_id emc2305_ids[] = { + { "emc2305", 0 }, + { "emc2303", 0 }, + { "emc2302", 0 }, + { "emc2301", 0 }, + { } + }; + MODULE_DEVICE_TABLE(i2c, emc2305_ids); + + /** + * @cdev: cooling device; + * @curr_state: cooling current state; + * @last_hwmon_state: last cooling state updated by hwmon subsystem; + * @last_thermal_state: last cooling state updated by thermal subsystem; + * + * The 'last_hwmon_state' and 'last_thermal_state' fields are provided to support fan low limit + * speed feature. The purpose of this feature is to provides ability to limit fan speed + * according to some system wise considerations, like absence of some replaceable units (PSU or + * line cards), high system ambient temperature, unreliable transceivers temperature sensing or + * some other factors which indirectly impacts system's airflow + * Fan low limit feature is supported through 'hwmon' interface: 'hwmon' 'pwm' attribute is + * used for setting low limit for fan speed in case 'thermal' subsystem is configured in + * kernel. In this case setting fan speed through 'hwmon' will never let the 'thermal' + * subsystem to select a lower duty cycle than the duty cycle selected with the 'pwm' + * attribute. + * From other side, fan speed is to be updated in hardware through 'pwm' only in case the + * requested fan speed is above last speed set by 'thermal' subsystem, otherwise requested fan + * speed will be just stored with no PWM update. + */ + struct emc2305_cdev_data { + struct thermal_cooling_device *cdev; + unsigned int cur_state; + unsigned long last_hwmon_state; + unsigned long last_thermal_state; + }; + + /** + * @client: i2c client; + * @hwmon_dev: hwmon device; + * @max_state: maximum cooling state of the cooling device; + * @pwm_num: number of PWM channels; + * @pwm_separate: separate PWM settings for every channel; + * @pwm_min: array of minimum PWM per channel; + * @cdev_data: array of cooling devices data; + */ + struct emc2305_data { + struct i2c_client *client; + struct device *hwmon_dev; + u8 max_state; + u8 pwm_num; + bool pwm_separate; + u8 pwm_min[EMC2305_PWM_MAX]; + struct emc2305_cdev_data cdev_data[EMC2305_PWM_MAX]; + }; + + static char *emc2305_fan_name[] = { + "emc2305_fan", + "emc2305_fan1", + "emc2305_fan2", + "emc2305_fan3", + "emc2305_fan4", + "emc2305_fan5", + }; + + static void emc2305_unset_tz(struct device *dev); + + static int emc2305_get_max_channel(const struct emc2305_data *data) + { + return data->pwm_num; + } + + static int emc2305_get_cdev_idx(struct thermal_cooling_device *cdev) + { + struct emc2305_data *data = cdev->devdata; + size_t len = strlen(cdev->type); + int ret; + + if (len <= 0) + return -EINVAL; + + /* + * Returns index of cooling device 0..4 in case of separate PWM setting. + * Zero index is used in case of one common PWM setting. + * If the mode is not set as pwm_separate, all PWMs are to be bound + * to the common thermal zone and should work at the same speed + * to perform cooling for the same thermal junction. + * Otherwise, return specific channel that will be used in bound + * related PWM to the thermal zone. + */ + if (!data->pwm_separate) + return 0; + + ret = cdev->type[len - 1]; + switch (ret) { + case '1' ... '5': + return ret - '1'; + default: + break; + } + return -EINVAL; + } + + static int emc2305_get_cur_state(struct thermal_cooling_device *cdev, unsigned long *state) + { + int cdev_idx; + struct emc2305_data *data = cdev->devdata; + + cdev_idx = emc2305_get_cdev_idx(cdev); + if (cdev_idx < 0) + return cdev_idx; + + *state = data->cdev_data[cdev_idx].cur_state; + return 0; + } + + static int emc2305_get_max_state(struct thermal_cooling_device *cdev, unsigned long *state) + { + struct emc2305_data *data = cdev->devdata; + *state = data->max_state; + return 0; + } + + static int emc2305_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state) + { + int cdev_idx, ret; + struct emc2305_data *data = cdev->devdata; + struct i2c_client *client = data->client; + u8 val, i; + + if (state > data->max_state) + return -EINVAL; + + cdev_idx = emc2305_get_cdev_idx(cdev); + if (cdev_idx < 0) + return cdev_idx; + + /* Save thermal state. */ + data->cdev_data[cdev_idx].last_thermal_state = state; + state = max_t(unsigned long, state, data->cdev_data[cdev_idx].last_hwmon_state); + + val = EMC2305_PWM_STATE2DUTY(state, data->max_state, EMC2305_FAN_MAX); + + data->cdev_data[cdev_idx].cur_state = state; + if (data->pwm_separate) { + ret = i2c_smbus_write_byte_data(client, EMC2305_REG_FAN_DRIVE(cdev_idx), val); + if (ret < 0) + return ret; + } else { + /* + * Set the same PWM value in all channels + * if common PWM channel is used. + */ + for (i = 0; i < data->pwm_num; i++) { + ret = i2c_smbus_write_byte_data(client, EMC2305_REG_FAN_DRIVE(i), val); + if (ret < 0) + return ret; + } + } + + return 0; + } + + static const struct thermal_cooling_device_ops emc2305_cooling_ops = { + .get_max_state = emc2305_get_max_state, + .get_cur_state = emc2305_get_cur_state, + .set_cur_state = emc2305_set_cur_state, + }; + + static int emc2305_show_fault(struct device *dev, int channel) + { + struct emc2305_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + int status_reg; + + status_reg = i2c_smbus_read_byte_data(client, EMC2305_REG_DRIVE_FAIL_STATUS); + if (status_reg < 0) + return status_reg; + + return status_reg & (1 << channel) ? 1 : 0; + } + + static int emc2305_show_fan(struct device *dev, int channel) + { + struct emc2305_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + int ret; + + ret = i2c_smbus_read_word_swapped(client, EMC2305_REG_FAN_TACH(channel)); + if (ret <= 0) + return ret; + + ret = ret >> EMC2305_TACH_REGS_UNUSE_BITS; + ret = EMC2305_RPM_FACTOR / ret; + if (ret <= EMC2305_TACH_RANGE_MIN) + return 0; + + return ret * EMC2305_TACH_CNT_MULTIPLIER; + } + + static int emc2305_show_pwm(struct device *dev, int channel) + { + struct emc2305_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + + return i2c_smbus_read_byte_data(client, EMC2305_REG_FAN_DRIVE(channel)); + } + + static int emc2305_set_pwm(struct device *dev, long val, int channel) + { + struct emc2305_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + int ret; + + if (val < data->pwm_min[channel] || val > EMC2305_FAN_MAX) + return -EINVAL; + + ret = i2c_smbus_write_byte_data(client, EMC2305_REG_FAN_DRIVE(channel), val); + if (ret < 0) + return ret; + data->cdev_data[channel].cur_state = EMC2305_PWM_DUTY2STATE(val, data->max_state, + EMC2305_FAN_MAX); + return 0; + } + + static int emc2305_set_single_tz(struct device *dev, int idx) + { + struct emc2305_data *data = dev_get_drvdata(dev); + long pwm; + int i, cdev_idx, ret; + + cdev_idx = (idx) ? idx - 1 : 0; + pwm = data->pwm_min[cdev_idx]; + + data->cdev_data[cdev_idx].cdev = + thermal_cooling_device_register(emc2305_fan_name[idx], data, + &emc2305_cooling_ops); + + if (IS_ERR(data->cdev_data[cdev_idx].cdev)) { + dev_err(dev, "Failed to register cooling device %s\n", emc2305_fan_name[idx]); + return PTR_ERR(data->cdev_data[cdev_idx].cdev); + } + /* Set minimal PWM speed. */ + if (data->pwm_separate) { + ret = emc2305_set_pwm(dev, pwm, cdev_idx); + if (ret < 0) + return ret; + } else { + for (i = 0; i < data->pwm_num; i++) { + ret = emc2305_set_pwm(dev, pwm, i); + if (ret < 0) + return ret; + } + } + data->cdev_data[cdev_idx].cur_state = + EMC2305_PWM_DUTY2STATE(data->pwm_min[cdev_idx], data->max_state, + EMC2305_FAN_MAX); + data->cdev_data[cdev_idx].last_hwmon_state = + EMC2305_PWM_DUTY2STATE(data->pwm_min[cdev_idx], data->max_state, + EMC2305_FAN_MAX); + return 0; + } + + static int emc2305_set_tz(struct device *dev) + { + struct emc2305_data *data = dev_get_drvdata(dev); + int i, ret; + + if (!data->pwm_separate) + return emc2305_set_single_tz(dev, 0); + + for (i = 0; i < data->pwm_num; i++) { + ret = emc2305_set_single_tz(dev, i + 1); + if (ret) + goto thermal_cooling_device_register_fail; + } + return 0; + + thermal_cooling_device_register_fail: + emc2305_unset_tz(dev); + return ret; + } + + static void emc2305_unset_tz(struct device *dev) + { + struct emc2305_data *data = dev_get_drvdata(dev); + int i; + + /* Unregister cooling device. */ + for (i = 0; i < EMC2305_PWM_MAX; i++) + if (data->cdev_data[i].cdev) + thermal_cooling_device_unregister(data->cdev_data[i].cdev); + } + + static umode_t + emc2305_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr, int channel) + { + int max_channel = emc2305_get_max_channel(data); + + /* Don't show channels which are not physically connected. */ + if (channel >= max_channel) + return 0; + switch (type) { + case hwmon_fan: + switch (attr) { + case hwmon_fan_input: + return 0444; + case hwmon_fan_fault: + return 0444; + default: + break; + } + break; + case hwmon_pwm: + switch (attr) { + case hwmon_pwm_input: + return 0644; + default: + break; + } + break; + default: + break; + } + + return 0; + }; + + static int + emc2305_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) + { + struct emc2305_data *data = dev_get_drvdata(dev); + int cdev_idx; + + switch (type) { + case hwmon_pwm: + switch (attr) { + case hwmon_pwm_input: + /* If thermal is configured - handle PWM limit setting. */ + if (IS_REACHABLE(CONFIG_THERMAL)) { + if (data->pwm_separate) + cdev_idx = channel; + else + cdev_idx = 0; + data->cdev_data[cdev_idx].last_hwmon_state = + EMC2305_PWM_DUTY2STATE(val, data->max_state, + EMC2305_FAN_MAX); + /* + * Update PWM only in case requested state is not less than the + * last thermal state. + */ + if (data->cdev_data[cdev_idx].last_hwmon_state >= + data->cdev_data[cdev_idx].last_thermal_state) + return emc2305_set_cur_state(data->cdev_data[cdev_idx].cdev, + data->cdev_data[cdev_idx].last_hwmon_state); + return 0; + } + return emc2305_set_pwm(dev, val, channel); + default: + break; + } + break; + default: + break; + } + + return -EOPNOTSUPP; + }; + + static int + emc2305_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) + { + int ret; + + switch (type) { + case hwmon_fan: + switch (attr) { + case hwmon_fan_input: + ret = emc2305_show_fan(dev, channel); + if (ret < 0) + return ret; + *val = ret; + return 0; + case hwmon_fan_fault: + ret = emc2305_show_fault(dev, channel); + if (ret < 0) + return ret; + *val = ret; + return 0; + default: + break; + } + break; + case hwmon_pwm: + switch (attr) { + case hwmon_pwm_input: + ret = emc2305_show_pwm(dev, channel); + if (ret < 0) + return ret; + *val = ret; + return 0; + default: + break; + } + break; + default: + break; + } + + return -EOPNOTSUPP; + }; + + static const struct hwmon_ops emc2305_ops = { + .is_visible = emc2305_is_visible, + .read = emc2305_read, + .write = emc2305_write, + }; + + static const struct hwmon_channel_info *emc2305_info[] = { + HWMON_CHANNEL_INFO(fan, + HWMON_F_INPUT | HWMON_F_FAULT, + HWMON_F_INPUT | HWMON_F_FAULT, + HWMON_F_INPUT | HWMON_F_FAULT, + HWMON_F_INPUT | HWMON_F_FAULT, + HWMON_F_INPUT | HWMON_F_FAULT), + HWMON_CHANNEL_INFO(pwm, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT), + NULL + }; + + static const struct hwmon_chip_info emc2305_chip_info = { + .ops = &emc2305_ops, + .info = emc2305_info, + }; + + static int emc2305_identify(struct device *dev) + { + struct i2c_client *client = to_i2c_client(dev); + struct emc2305_data *data = i2c_get_clientdata(client); + int ret; + + ret = i2c_smbus_read_byte_data(client, EMC2305_REG_PRODUCT_ID); + if (ret < 0) + return ret; + + switch (ret) { + case EMC2305: + data->pwm_num = 5; + break; + case EMC2303: + data->pwm_num = 3; + break; + case EMC2302: + data->pwm_num = 2; + break; + case EMC2301: + data->pwm_num = 1; + break; + default: + return -ENODEV; + } + + return 0; + } + + static int emc2305_probe(struct i2c_client *client, const struct i2c_device_id *id) + { + struct i2c_adapter *adapter = client->adapter; + struct device *dev = &client->dev; + struct emc2305_data *data; + struct emc2305_platform_data *pdata; + int vendor, device; + int ret; + int i; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA)) + return -ENODEV; + + vendor = i2c_smbus_read_byte_data(client, EMC2305_REG_VENDOR); + if (vendor != EMC2305_VENDOR) + return -ENODEV; + + device = i2c_smbus_read_byte_data(client, EMC2305_REG_DEVICE); + if (device != EMC2305_DEVICE) + return -ENODEV; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + i2c_set_clientdata(client, data); + data->client = client; + + ret = emc2305_identify(dev); + if (ret) + return ret; + + pdata = dev_get_platdata(&client->dev); + if (pdata) { + if (!pdata->max_state || pdata->max_state > EMC2305_FAN_MAX_STATE) + return -EINVAL; + data->max_state = pdata->max_state; + /* + * Validate a number of active PWM channels. Note that + * configured number can be less than the actual maximum + * supported by the device. + */ + if (!pdata->pwm_num || pdata->pwm_num > EMC2305_PWM_MAX) + return -EINVAL; + data->pwm_num = pdata->pwm_num; + data->pwm_separate = pdata->pwm_separate; + for (i = 0; i < EMC2305_PWM_MAX; i++) + data->pwm_min[i] = pdata->pwm_min[i]; + } else { + data->max_state = EMC2305_FAN_MAX_STATE; + data->pwm_separate = false; + for (i = 0; i < EMC2305_PWM_MAX; i++) + data->pwm_min[i] = EMC2305_FAN_MIN; + } + + data->hwmon_dev = devm_hwmon_device_register_with_info(dev, "emc2305", data, + &emc2305_chip_info, NULL); + if (IS_ERR(data->hwmon_dev)) + return PTR_ERR(data->hwmon_dev); + + if (IS_REACHABLE(CONFIG_THERMAL)) { + ret = emc2305_set_tz(dev); + if (ret != 0) + return ret; + } + + for (i = 0; i < data->pwm_num; i++) { + ret = i2c_smbus_write_byte_data(client, EMC2305_REG_FAN_MIN_DRIVE(i), + data->pwm_min[i]); + if (ret < 0) + return ret; + } + + return 0; + } + -static int emc2305_remove(struct i2c_client *client) ++static void emc2305_remove(struct i2c_client *client) + { + struct device *dev = &client->dev; + + if (IS_REACHABLE(CONFIG_THERMAL)) + emc2305_unset_tz(dev); - return 0; + } + + static struct i2c_driver emc2305_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "emc2305", + }, + .probe = emc2305_probe, + .remove = emc2305_remove, + .id_table = emc2305_ids, + .address_list = emc2305_normal_i2c, + }; + + module_i2c_driver(emc2305_driver); + + MODULE_AUTHOR("Nvidia"); + MODULE_DESCRIPTION("Microchip EMC2305 fan controller driver"); + MODULE_LICENSE("GPL"); diff --cc drivers/hwmon/ina3221.c index f89bac1,8ef2631..2a57f4b --- a/drivers/hwmon/ina3221.c +++ b/drivers/hwmon/ina3221.c @@@ -926,9 -926,11 +926,9 @@@ static void ina3221_remove(struct i2c_c pm_runtime_put_noidle(ina->pm_dev); mutex_destroy(&ina->lock); - - return 0; } - static int __maybe_unused ina3221_suspend(struct device *dev) + static int ina3221_suspend(struct device *dev) { struct ina3221_data *ina = dev_get_drvdata(dev); int ret;