Lines Matching full:fan
20 * Minimum and maximum FAN allowed speed in percent: from 20% to 100%. Values
22 * setting FAN speed dynamic minimum. For example, if value is set to 14 (40%)
34 * FAN datasheet defines the formula for RPM calculations as RPM = 15/t-high.
120 struct mlxreg_fan *fan = dev_get_drvdata(dev); in mlxreg_fan_read() local
127 tacho = &fan->tacho[channel]; in mlxreg_fan_read()
131 * Check FAN presence: FAN related bit in presence register is one, in mlxreg_fan_read()
132 * if FAN is physically connected, zero - otherwise. in mlxreg_fan_read()
134 if (tacho->prsnt && fan->tachos_per_drwr) { in mlxreg_fan_read()
135 err = regmap_read(fan->regmap, tacho->prsnt, ®val); in mlxreg_fan_read()
143 if (BIT(channel / fan->tachos_per_drwr) & regval) { in mlxreg_fan_read()
144 /* FAN is not connected - return zero for FAN speed. */ in mlxreg_fan_read()
150 err = regmap_read(fan->regmap, tacho->reg, ®val); in mlxreg_fan_read()
154 *val = MLXREG_FAN_GET_RPM(regval, fan->divider, in mlxreg_fan_read()
155 fan->samples); in mlxreg_fan_read()
159 err = regmap_read(fan->regmap, tacho->reg, ®val); in mlxreg_fan_read()
174 err = regmap_read(fan->regmap, fan->pwm.reg, ®val); in mlxreg_fan_read()
197 struct mlxreg_fan *fan = dev_get_drvdata(dev); in mlxreg_fan_write() local
206 return regmap_write(fan->regmap, fan->pwm.reg, val); in mlxreg_fan_write()
257 HWMON_CHANNEL_INFO(fan,
297 struct mlxreg_fan *fan = cdev->devdata; in mlxreg_fan_get_cur_state() local
301 err = regmap_read(fan->regmap, fan->pwm.reg, ®val); in mlxreg_fan_get_cur_state()
303 dev_err(fan->dev, "Failed to query PWM duty\n"); in mlxreg_fan_get_cur_state()
316 struct mlxreg_fan *fan = cdev->devdata; in mlxreg_fan_set_cur_state() local
323 * Verify if this request is for changing allowed FAN dynamical in mlxreg_fan_set_cur_state()
327 * changed from 4 to 6, fan->cooling_levels[0 to 5] will be changed all in mlxreg_fan_set_cur_state()
328 * from 4 to 6. And state 5 (fan->cooling_levels[4]) should be in mlxreg_fan_set_cur_state()
340 fan->cooling_levels[i] = state; in mlxreg_fan_set_cur_state()
342 fan->cooling_levels[i] = i; in mlxreg_fan_set_cur_state()
344 err = regmap_read(fan->regmap, fan->pwm.reg, ®val); in mlxreg_fan_set_cur_state()
346 dev_err(fan->dev, "Failed to query PWM duty\n"); in mlxreg_fan_set_cur_state()
361 state = fan->cooling_levels[state]; in mlxreg_fan_set_cur_state()
362 err = regmap_write(fan->regmap, fan->pwm.reg, in mlxreg_fan_set_cur_state()
365 dev_err(fan->dev, "Failed to write PWM duty\n"); in mlxreg_fan_set_cur_state()
377 static int mlxreg_fan_connect_verify(struct mlxreg_fan *fan, in mlxreg_fan_connect_verify() argument
383 err = regmap_read(fan->regmap, data->capability, ®val); in mlxreg_fan_connect_verify()
385 dev_err(fan->dev, "Failed to query capability register 0x%08x\n", in mlxreg_fan_connect_verify()
393 static int mlxreg_fan_speed_divider_get(struct mlxreg_fan *fan, in mlxreg_fan_speed_divider_get() argument
399 err = regmap_read(fan->regmap, data->capability, ®val); in mlxreg_fan_speed_divider_get()
401 dev_err(fan->dev, "Failed to query capability register 0x%08x\n", in mlxreg_fan_speed_divider_get()
413 fan->divider = regval * MLXREG_FAN_TACHO_DIV_MIN; in mlxreg_fan_speed_divider_get()
418 static int mlxreg_fan_config(struct mlxreg_fan *fan, in mlxreg_fan_config() argument
426 fan->samples = MLXREG_FAN_TACHO_SAMPLES_PER_PULSE_DEF; in mlxreg_fan_config()
427 fan->divider = MLXREG_FAN_TACHO_DIV_DEF; in mlxreg_fan_config()
431 dev_err(fan->dev, "too many tacho entries: %s\n", in mlxreg_fan_config()
437 err = mlxreg_fan_connect_verify(fan, data); in mlxreg_fan_config()
446 fan->tacho[tacho_num].reg = data->reg; in mlxreg_fan_config()
447 fan->tacho[tacho_num].mask = data->mask; in mlxreg_fan_config()
448 fan->tacho[tacho_num].prsnt = data->reg_prsnt; in mlxreg_fan_config()
449 fan->tacho[tacho_num++].connected = true; in mlxreg_fan_config()
452 if (fan->pwm.connected) { in mlxreg_fan_config()
453 dev_err(fan->dev, "duplicate pwm entry: %s\n", in mlxreg_fan_config()
457 fan->pwm.reg = data->reg; in mlxreg_fan_config()
458 fan->pwm.connected = true; in mlxreg_fan_config()
461 dev_err(fan->dev, "duplicate conf entry: %s\n", in mlxreg_fan_config()
467 dev_err(fan->dev, "invalid conf entry params: %s\n", in mlxreg_fan_config()
472 err = mlxreg_fan_speed_divider_get(fan, data); in mlxreg_fan_config()
477 fan->samples = data->mask; in mlxreg_fan_config()
479 fan->divider = data->bit; in mlxreg_fan_config()
483 dev_err(fan->dev, "invalid label: %s\n", data->label); in mlxreg_fan_config()
492 /* Obtain the number of FAN drawers, supported by system. */ in mlxreg_fan_config()
493 err = regmap_read(fan->regmap, pdata->capability, ®val); in mlxreg_fan_config()
495 dev_err(fan->dev, "Failed to query capability register 0x%08x\n", in mlxreg_fan_config()
502 dev_err(fan->dev, "Configuration is invalid: drawers num %d tachos num %d\n", in mlxreg_fan_config()
508 fan->tachos_per_drwr = tacho_avail / drwr_avail; in mlxreg_fan_config()
513 fan->cooling_levels[i] = MLXREG_FAN_SPEED_MIN_LEVEL; in mlxreg_fan_config()
515 fan->cooling_levels[i] = i; in mlxreg_fan_config()
524 struct mlxreg_fan *fan; in mlxreg_fan_probe() local
534 fan = devm_kzalloc(dev, sizeof(*fan), GFP_KERNEL); in mlxreg_fan_probe()
535 if (!fan) in mlxreg_fan_probe()
538 fan->dev = dev; in mlxreg_fan_probe()
539 fan->regmap = pdata->regmap; in mlxreg_fan_probe()
541 err = mlxreg_fan_config(fan, pdata); in mlxreg_fan_probe()
546 fan, in mlxreg_fan_probe()
555 fan->cdev = devm_thermal_of_cooling_device_register(dev, in mlxreg_fan_probe()
556 NULL, "mlxreg_fan", fan, &mlxreg_fan_cooling_ops); in mlxreg_fan_probe()
557 if (IS_ERR(fan->cdev)) { in mlxreg_fan_probe()
559 return PTR_ERR(fan->cdev); in mlxreg_fan_probe()
568 .name = "mlxreg-fan",
576 MODULE_DESCRIPTION("Mellanox FAN driver");
578 MODULE_ALIAS("platform:mlxreg-fan");