1 // SPDX-License-Identifier: GPL-2.0
9 #include <linux/fpga/adi-axi-common.h>
11 #include <linux/hwmon-sysfs.h>
65 	iowrite32(val, ctl->base + reg);  in axi_iowrite()
71 	return ioread32(ctl->base + reg);  in axi_ioread()
76  *	T = /raw * 509.3140064 / 65535) - 280.2308787
82 	u32 temp = axi_ioread(attr->index, ctl);  in axi_fan_control_show()
84 	temp = DIV_ROUND_CLOSEST_ULL(temp * 509314ULL, 65535) - 280230;  in axi_fan_control_show()
97 	ret = kstrtou32(buf, 10, &temp);  in axi_fan_control_store()
102 	axi_iowrite(temp, attr->index, ctl);  in axi_fan_control_store()
147 	return DIV_ROUND_CLOSEST(60 * ctl->clk_rate, ctl->ppr * tach);  in axi_fan_control_get_fan_rpm()
160 		 *      T = (ADC * 501.3743 / 2^bits) - 273.6777  in axi_fan_control_read_temp()
164 		*val = ((raw_temp * 501374) >> 16) - 273677;  in axi_fan_control_read_temp()
167 		return -ENOTSUPP;  in axi_fan_control_read_temp()
177 		*val = ctl->fan_fault;  in axi_fan_control_read_fan()
179 		ctl->fan_fault = 0;  in axi_fan_control_read_fan()
185 		return -ENOTSUPP;  in axi_fan_control_read_fan()
198 		return -ENOTSUPP;  in axi_fan_control_read_pwm()
210 		return -ENOTSUPP;  in axi_fan_control_write_pwm()
226 		return -ENOTSUPP;  in axi_fan_control_read_labels()
242 		return -ENOTSUPP;  in axi_fan_control_read()
254 		return -ENOTSUPP;  in axi_fan_control_write()
320  * already to the ney duty cycle) based on the %ctl->hw_pwm_req flag.
330 		ctl->hw_pwm_req = true;  in axi_fan_control_irq_handler()
338 		if (!ctl->hw_pwm_req) {  in axi_fan_control_irq_handler()
339 			ctl->update_tacho_params = true;  in axi_fan_control_irq_handler()
341 			ctl->hw_pwm_req = false;  in axi_fan_control_irq_handler()
342 			hwmon_notify_event(ctl->hdev, hwmon_pwm,  in axi_fan_control_irq_handler()
348 		if (ctl->update_tacho_params) {  in axi_fan_control_irq_handler()
356 			ctl->update_tacho_params = false;  in axi_fan_control_irq_handler()
361 		ctl->fan_fault = 1;  in axi_fan_control_irq_handler()
376 	ret = of_property_read_u32(np, "pulses-per-revolution", &ctl->ppr);  in axi_fan_control_init()
381 	if (ctl->ppr != 1 && ctl->ppr != 2 && ctl->ppr != 4)  in axi_fan_control_init()
382 		return -EINVAL;  in axi_fan_control_init()
449 	{ .compatible = "adi,axi-fan-control-1.00.a",
464 	id = of_match_node(axi_fan_control_of_match, pdev->dev.of_node);  in axi_fan_control_probe()
466 		return -EINVAL;  in axi_fan_control_probe()
468 	ctl = devm_kzalloc(&pdev->dev, sizeof(*ctl), GFP_KERNEL);  in axi_fan_control_probe()
470 		return -ENOMEM;  in axi_fan_control_probe()
472 	ctl->base = devm_platform_ioremap_resource(pdev, 0);  in axi_fan_control_probe()
473 	if (IS_ERR(ctl->base))  in axi_fan_control_probe()
474 		return PTR_ERR(ctl->base);  in axi_fan_control_probe()
476 	clk = devm_clk_get_enabled(&pdev->dev, NULL);  in axi_fan_control_probe()
478 		dev_err(&pdev->dev, "clk_get failed with %ld\n", PTR_ERR(clk));  in axi_fan_control_probe()
482 	ctl->clk_rate = clk_get_rate(clk);  in axi_fan_control_probe()
483 	if (!ctl->clk_rate)  in axi_fan_control_probe()
484 		return -EINVAL;  in axi_fan_control_probe()
488 	    ADI_AXI_PCORE_VER_MAJOR((*(u32 *)id->data))) {  in axi_fan_control_probe()
489 		dev_err(&pdev->dev, "Major version mismatch. Expected %d.%.2d.%c, Reported %d.%.2d.%c\n",  in axi_fan_control_probe()
490 			ADI_AXI_PCORE_VER_MAJOR((*(u32 *)id->data)),  in axi_fan_control_probe()
491 			ADI_AXI_PCORE_VER_MINOR((*(u32 *)id->data)),  in axi_fan_control_probe()
492 			ADI_AXI_PCORE_VER_PATCH((*(u32 *)id->data)),  in axi_fan_control_probe()
496 		return -ENODEV;  in axi_fan_control_probe()
499 	ctl->irq = platform_get_irq(pdev, 0);  in axi_fan_control_probe()
500 	if (ctl->irq < 0)  in axi_fan_control_probe()
501 		return ctl->irq;  in axi_fan_control_probe()
503 	ret = devm_request_threaded_irq(&pdev->dev, ctl->irq, NULL,  in axi_fan_control_probe()
506 					pdev->driver_override, ctl);  in axi_fan_control_probe()
508 		dev_err(&pdev->dev, "failed to request an irq, %d", ret);  in axi_fan_control_probe()
512 	ret = axi_fan_control_init(ctl, pdev->dev.of_node);  in axi_fan_control_probe()
514 		dev_err(&pdev->dev, "Failed to initialize device\n");  in axi_fan_control_probe()
518 	ctl->hdev = devm_hwmon_device_register_with_info(&pdev->dev,  in axi_fan_control_probe()
524 	return PTR_ERR_OR_ZERO(ctl->hdev);  in axi_fan_control_probe()