aspeed-pwm-tacho.c (fe33c0fbed75dd464747c0faaedf94c7d8eb4101) aspeed-pwm-tacho.c (1168491e7f53581ba7b6014a39a49cfbbb722feb)
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2016 Google, Inc
4 */
5
6#include <linux/clk.h>
7#include <linux/delay.h>
8#include <linux/errno.h>

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190 u8 type_fan_tach_clock_division[3];
191 u8 type_fan_tach_mode[3];
192 u16 type_fan_tach_unit[3];
193 u8 pwm_port_type[8];
194 u8 pwm_port_fan_ctrl[8];
195 u8 fan_tach_ch_source[MAX_ASPEED_FAN_TACH_CHANNELS];
196 struct aspeed_cooling_device *cdev[8];
197 const struct attribute_group *groups[3];
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2016 Google, Inc
4 */
5
6#include <linux/clk.h>
7#include <linux/delay.h>
8#include <linux/errno.h>

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190 u8 type_fan_tach_clock_division[3];
191 u8 type_fan_tach_mode[3];
192 u16 type_fan_tach_unit[3];
193 u8 pwm_port_type[8];
194 u8 pwm_port_fan_ctrl[8];
195 u8 fan_tach_ch_source[MAX_ASPEED_FAN_TACH_CHANNELS];
196 struct aspeed_cooling_device *cdev[8];
197 const struct attribute_group *groups[3];
198 /* protects access to shared ASPEED_PTCR_RESULT */
199 struct mutex tach_lock;
198};
199
200enum type { TYPEM, TYPEN, TYPEO };
201
202struct type_params {
203 u32 l_value;
204 u32 h_value;
205 u32 unit_value;

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524
525static int aspeed_get_fan_tach_ch_rpm(struct aspeed_pwm_tacho_data *priv,
526 u8 fan_tach_ch)
527{
528 u32 raw_data, tach_div, clk_source, msec, usec, val;
529 u8 fan_tach_ch_source, type, mode, both;
530 int ret;
531
200};
201
202enum type { TYPEM, TYPEN, TYPEO };
203
204struct type_params {
205 u32 l_value;
206 u32 h_value;
207 u32 unit_value;

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526
527static int aspeed_get_fan_tach_ch_rpm(struct aspeed_pwm_tacho_data *priv,
528 u8 fan_tach_ch)
529{
530 u32 raw_data, tach_div, clk_source, msec, usec, val;
531 u8 fan_tach_ch_source, type, mode, both;
532 int ret;
533
534 mutex_lock(&priv->tach_lock);
535
532 regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0);
533 regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0x1 << fan_tach_ch);
534
535 fan_tach_ch_source = priv->fan_tach_ch_source[fan_tach_ch];
536 type = priv->pwm_port_type[fan_tach_ch_source];
537
538 msec = (1000 / aspeed_get_fan_tach_ch_measure_period(priv, type));
539 usec = msec * 1000;
540
541 ret = regmap_read_poll_timeout(
542 priv->regmap,
543 ASPEED_PTCR_RESULT,
544 val,
545 (val & RESULT_STATUS_MASK),
546 ASPEED_RPM_STATUS_SLEEP_USEC,
547 usec);
548
536 regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0);
537 regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0x1 << fan_tach_ch);
538
539 fan_tach_ch_source = priv->fan_tach_ch_source[fan_tach_ch];
540 type = priv->pwm_port_type[fan_tach_ch_source];
541
542 msec = (1000 / aspeed_get_fan_tach_ch_measure_period(priv, type));
543 usec = msec * 1000;
544
545 ret = regmap_read_poll_timeout(
546 priv->regmap,
547 ASPEED_PTCR_RESULT,
548 val,
549 (val & RESULT_STATUS_MASK),
550 ASPEED_RPM_STATUS_SLEEP_USEC,
551 usec);
552
553 mutex_unlock(&priv->tach_lock);
554
549 /* return -ETIMEDOUT if we didn't get an answer. */
550 if (ret)
551 return ret;
552
553 raw_data = val & RESULT_VALUE_MASK;
554 tach_div = priv->type_fan_tach_clock_division[type];
555 /*
556 * We need the mode to determine if the raw_data is double (from

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910
911 np = dev->of_node;
912 regs = devm_platform_ioremap_resource(pdev, 0);
913 if (IS_ERR(regs))
914 return PTR_ERR(regs);
915 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
916 if (!priv)
917 return -ENOMEM;
555 /* return -ETIMEDOUT if we didn't get an answer. */
556 if (ret)
557 return ret;
558
559 raw_data = val & RESULT_VALUE_MASK;
560 tach_div = priv->type_fan_tach_clock_division[type];
561 /*
562 * We need the mode to determine if the raw_data is double (from

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916
917 np = dev->of_node;
918 regs = devm_platform_ioremap_resource(pdev, 0);
919 if (IS_ERR(regs))
920 return PTR_ERR(regs);
921 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
922 if (!priv)
923 return -ENOMEM;
924 mutex_init(&priv->tach_lock);
918 priv->regmap = devm_regmap_init(dev, NULL, (__force void *)regs,
919 &aspeed_pwm_tacho_regmap_config);
920 if (IS_ERR(priv->regmap))
921 return PTR_ERR(priv->regmap);
922
923 priv->rst = devm_reset_control_get_exclusive(dev, NULL);
924 if (IS_ERR(priv->rst)) {
925 dev_err(dev,

--- 58 unchanged lines hidden --- 		925 priv->regmap = devm_regmap_init(dev, NULL, (__force void *)regs,
926 &aspeed_pwm_tacho_regmap_config);
927 if (IS_ERR(priv->regmap))
928 return PTR_ERR(priv->regmap);
929
930 priv->rst = devm_reset_control_get_exclusive(dev, NULL);
931 if (IS_ERR(priv->rst)) {
932 dev_err(dev,

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