diff options
Diffstat (limited to 'chip/it83xx/fan.c')
| -rw-r--r-- | chip/it83xx/fan.c | 55 |
1 files changed, 26 insertions, 29 deletions
diff --git a/chip/it83xx/fan.c b/chip/it83xx/fan.c index adb3985025..b8b805453e 100644 --- a/chip/it83xx/fan.c +++ b/chip/it83xx/fan.c @@ -1,4 +1,4 @@ -/* Copyright 2015 The Chromium OS Authors. All rights reserved. +/* Copyright 2015 The ChromiumOS Authors * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ @@ -18,12 +18,12 @@ #include "task.h" #include "util.h" -#define TACH_EC_FREQ 8000000 -#define FAN_CTRL_BASED_MS 10 -#define FAN_CTRL_INTERVAL_MAX_MS 60 +#define TACH_EC_FREQ 8000000 +#define FAN_CTRL_BASED_MS 10 +#define FAN_CTRL_INTERVAL_MAX_MS 60 /* The sampling rate (fs) is FreqEC / 128 */ -#define TACH_DATA_VALID_TIMEOUT_MS (0xFFFF * 128 / (TACH_EC_FREQ / 1000)) +#define TACH_DATA_VALID_TIMEOUT_MS (0xFFFF * 128 / (TACH_EC_FREQ / 1000)) /* * Fan Speed (RPM) = 60 / (1/fs sec * {FnTMRR, FnTLRR} * P) @@ -37,25 +37,25 @@ #define TACH1_TO_RPM(pulse, raw) (raw * 120 / (pulse * 2)) enum fan_output_s { - FAN_DUTY_I = 0x01, - FAN_DUTY_R = 0x02, + FAN_DUTY_I = 0x01, + FAN_DUTY_R = 0x02, FAN_DUTY_OV = 0x03, FAN_DUTY_DONE = 0x04, }; struct fan_info { - unsigned int flags; - int fan_mode; - int fan_p; - int rpm_target; - int rpm_actual; - int tach_valid_ms; - int rpm_re; - int fan_ms; - int fan_ms_idx; - int startup_duty; + unsigned int flags; + int fan_mode; + int fan_p; + int rpm_target; + int rpm_actual; + int tach_valid_ms; + int rpm_re; + int fan_ms; + int fan_ms_idx; + int startup_duty; enum fan_status fan_sts; - int enabled; + int enabled; }; static struct fan_info fan_info_data[TACH_CH_COUNT]; @@ -72,7 +72,8 @@ static void fan_set_interval(int ch) tach_ch = tach_bind(ch); diff = ABS(fan_info_data[tach_ch].rpm_target - - fan_info_data[tach_ch].rpm_actual) / 100; + fan_info_data[tach_ch].rpm_actual) / + 100; fan_ms = FAN_CTRL_INTERVAL_MAX_MS; @@ -122,7 +123,7 @@ void fan_set_enabled(int ch, int enabled) disable_sleep(SLEEP_MASK_FAN); /* enable timer interrupt for fan control */ ext_timer_start(FAN_CTRL_EXT_TIMER, 1); - /* disable */ + /* disable */ } else { fan_set_duty(ch, 0); @@ -245,9 +246,8 @@ enum fan_status fan_get_status(int ch) int fan_is_stalled(int ch) { /* Must be enabled with non-zero target to stall */ - if (!fan_get_enabled(ch) || - fan_get_rpm_target(ch) == 0 || - !fan_get_duty(ch)) + if (!fan_get_enabled(ch) || fan_get_rpm_target(ch) == 0 || + !fan_get_duty(ch)) return 0; /* Check for stall condition */ @@ -273,8 +273,7 @@ static void fan_ctrl(int ch) tach_ch = tach_bind(ch); fan_info_data[tach_ch].fan_ms_idx += FAN_CTRL_BASED_MS; - if (fan_info_data[tach_ch].fan_ms_idx > - fan_info_data[tach_ch].fan_ms) { + if (fan_info_data[tach_ch].fan_ms_idx > fan_info_data[tach_ch].fan_ms) { fan_info_data[tach_ch].fan_ms_idx = 0x00; adjust = 1; } @@ -411,7 +410,7 @@ static void proc_tach(int ch) } else { fan_info_data[tach_ch].tach_valid_ms += FAN_CTRL_BASED_MS; if (fan_info_data[tach_ch].tach_valid_ms > - TACH_DATA_VALID_TIMEOUT_MS) + TACH_DATA_VALID_TIMEOUT_MS) fan_info_data[tach_ch].rpm_actual = 0; } } @@ -436,14 +435,12 @@ static void fan_init(void) enum tach_ch_sel tach_ch; for (ch = 0; ch < fan_get_count(); ch++) { - rpm_re = fan_tach[pwm_channels[FAN_CH(ch)].channel].rpm_re; fan_p = fan_tach[pwm_channels[FAN_CH(ch)].channel].fan_p; s_duty = fan_tach[pwm_channels[FAN_CH(ch)].channel].s_duty; tach_ch = tach_bind(FAN_CH(ch)); if (tach_ch < TACH_CH_COUNT) { - if (tach_ch == TACH_CH_TACH0B) { /* GPJ2 will select TACH0B as its alt. */ IT83XX_GPIO_GRC5 |= 0x01; @@ -473,6 +470,6 @@ static void fan_init(void) /* init external timer for fan control */ ext_timer_ms(FAN_CTRL_EXT_TIMER, EXT_PSR_32P768K_HZ, 0, 0, - FAN_CTRL_BASED_MS, 1, 0); + FAN_CTRL_BASED_MS, 1, 0); } DECLARE_HOOK(HOOK_INIT, fan_init, HOOK_PRIO_INIT_FAN); |