79 /* NPCM7XX FAN Tacho registers */
140 /* FAN General Definition */
141 /* Define the maximum FAN channel number */
147  * Get Fan Tach Timeout (base on clock 214843.75Hz, 1 cnt = 4.654us)
149  * (The minimum FAN speed could to support ~640RPM/pulse 1,
165 /* Obtain the fan number */
166 #define NPCM7XX_FAN_INPUT(fan, cmp)		(((fan) << 1) + (cmp))  argument
168 /* fan sample status */
265 					     u8 fan, u8 cmp)  in npcm7xx_fan_start_capture()  argument
272 	fan_id = NPCM7XX_FAN_INPUT(fan, cmp);  in npcm7xx_fan_start_capture()
274 	/* to check whether any fan tach is enable */  in npcm7xx_fan_start_capture()
277 		spin_lock_irqsave(&data->fan_lock[fan], flags);  in npcm7xx_fan_start_capture()
280 		reg_int = ioread8(NPCM7XX_FAN_REG_TIEN(data->fan_base, fan));  in npcm7xx_fan_start_capture()
292 				 NPCM7XX_FAN_REG_TIEN(data->fan_base, fan));  in npcm7xx_fan_start_capture()
296 							       fan));  in npcm7xx_fan_start_capture()
300 								fan));  in npcm7xx_fan_start_capture()
305 				 NPCM7XX_FAN_REG_TIEN(data->fan_base, fan));  in npcm7xx_fan_start_capture()
310 							       fan));  in npcm7xx_fan_start_capture()
314 				 NPCM7XX_FAN_REG_TCKC(data->fan_base, fan));  in npcm7xx_fan_start_capture()
317 		spin_unlock_irqrestore(&data->fan_lock[fan], flags);  in npcm7xx_fan_start_capture()
322  * Enable a background timer to poll fan tach value, (200ms * 4)
323  * to polling all fan
364 				       u8 fan, u8 cmp, u8 fan_id, u8 flag_int,  in npcm7xx_fan_compute()  argument
372 		fan_cap = ioread16(NPCM7XX_FAN_REG_TCRA(data->fan_base, fan));  in npcm7xx_fan_compute()
374 		fan_cap = ioread16(NPCM7XX_FAN_REG_TCRB(data->fan_base, fan));  in npcm7xx_fan_compute()
377 	iowrite8(flag_clear, NPCM7XX_FAN_REG_TICLR(data->fan_base, fan));  in npcm7xx_fan_compute()
389 		 * (ex: 2 pulse fan need to get 2 sample)  in npcm7xx_fan_compute()
396 		/* get enough sample or fan disable */  in npcm7xx_fan_compute()
409 		reg_int =  ioread8(NPCM7XX_FAN_REG_TIEN(data->fan_base, fan));  in npcm7xx_fan_compute()
413 			 NPCM7XX_FAN_REG_TIEN(data->fan_base, fan));  in npcm7xx_fan_compute()
414 		reg_mode =  ioread8(NPCM7XX_FAN_REG_TCKC(data->fan_base, fan));  in npcm7xx_fan_compute()
418 			 NPCM7XX_FAN_REG_TCKC(data->fan_base, fan));  in npcm7xx_fan_compute()
423 				     u8 fan, u8 cmp, u8 flag)  in npcm7xx_check_cmp()  argument
434 	fan_id = NPCM7XX_FAN_INPUT(fan, cmp);  in npcm7xx_check_cmp()
451 		reg_int =  ioread8(NPCM7XX_FAN_REG_TIEN(data->fan_base, fan));  in npcm7xx_check_cmp()
455 			 NPCM7XX_FAN_REG_TIEN(data->fan_base, fan));  in npcm7xx_check_cmp()
459 			 NPCM7XX_FAN_REG_TICLR(data->fan_base, fan));  in npcm7xx_check_cmp()
461 		reg_mode =  ioread8(NPCM7XX_FAN_REG_TCKC(data->fan_base, fan));  in npcm7xx_check_cmp()
465 			 NPCM7XX_FAN_REG_TCKC(data->fan_base, fan));  in npcm7xx_check_cmp()
468 		 *  If timeout occurs (NPCM7XX_FAN_TIMEOUT), the fan doesn't  in npcm7xx_check_cmp()
476 			npcm7xx_fan_compute(data, fan, cmp, fan_id, flag_int,  in npcm7xx_check_cmp()
642 	HWMON_CHANNEL_INFO(fan,
756 		/* set FAN0~7 fan input FANIN 0~15 */  in npcm7xx_fan_init()
773 	/* Fan tach input clock = APB clock / prescalar, default is 255. */  in npcm7xx_fan_init()
887 	fan_cnt = of_property_count_u8_elems(child, "fan-tach-ch");  in npcm7xx_en_pwm_fan()
895 	ret = of_property_read_u8_array(child, "fan-tach-ch", fan_ch, fan_cnt);  in npcm7xx_en_pwm_fan()
943 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fan");  in npcm7xx_pwm_fan_probe()
945 		dev_err(dev, "fan resource not found\n");  in npcm7xx_pwm_fan_probe()
950 	dev_dbg(dev, "fan base resource is %pR\n", res);  in npcm7xx_pwm_fan_probe()
954 	data->fan_clk = devm_clk_get(dev, "fan");  in npcm7xx_pwm_fan_probe()
956 		dev_err(dev, "couldn't get fan clock\n");  in npcm7xx_pwm_fan_probe()
973 		sprintf(name, "NPCM7XX-FAN-MD%d", i);  in npcm7xx_pwm_fan_probe()
977 			dev_err(dev, "register IRQ fan%d failed\n", i);  in npcm7xx_pwm_fan_probe()
985 			dev_err(dev, "enable pwm and fan failed\n");  in npcm7xx_pwm_fan_probe()
1001 			/* fan timer initialization */  in npcm7xx_pwm_fan_probe()
1011 	pr_info("NPCM7XX PWM-FAN Driver probed, output Freq %dHz[PWM], input Freq %dHz[FAN]\n",  in npcm7xx_pwm_fan_probe()
1018 	{ .compatible = "nuvoton,npcm750-pwm-fan", },
1033 MODULE_DESCRIPTION("Nuvoton NPCM7XX PWM and Fan Tacho driver");