diff options
Diffstat (limited to 'board/marasov/fans.c')
-rw-r--r-- | board/marasov/fans.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/board/marasov/fans.c b/board/marasov/fans.c new file mode 100644 index 0000000000..158f4bf704 --- /dev/null +++ b/board/marasov/fans.c @@ -0,0 +1,89 @@ +/* Copyright 2022 The ChromiumOS Authors + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +/* Physical fans. These are logically separate from pwm_channels. */ + +#include "common.h" +#include "compile_time_macros.h" +#include "console.h" +#include "fan_chip.h" +#include "fan.h" +#include "hooks.h" +#include "pwm.h" + +/* MFT channels. These are logically separate from pwm_channels. */ +const struct mft_t mft_channels[] = { + [MFT_CH_0] = { + .module = NPCX_MFT_MODULE_1, + .clk_src = TCKC_LFCLK, + .pwm_id = PWM_CH_FAN, + }, +}; +BUILD_ASSERT(ARRAY_SIZE(mft_channels) == MFT_CH_COUNT); + +static const struct fan_conf fan_conf_0 = { + .flags = FAN_USE_RPM_MODE, + .ch = MFT_CH_0, /* Use MFT id to control fan */ + .pgood_gpio = -1, + .enable_gpio = GPIO_EN_PP5000_FAN, +}; + +/* + * TOOD(b/181271666): thermistor placement and calibration + * + * Prototype fan spins at about 4200 RPM at 100% PWM, this + * is specific to board ID 2 and might also apears in later + * boards as well. + */ +static const struct fan_rpm fan_rpm_0 = { + .rpm_min = 2200, + .rpm_start = 2200, + .rpm_max = 4200, +}; + +const struct fan_t fans[FAN_CH_COUNT] = { + [FAN_CH_0] = { + .conf = &fan_conf_0, + .rpm = &fan_rpm_0, + }, +}; + +#ifndef CONFIG_FANS + +/* + * TODO(b/181271666): use static fan speeds until fan and sensors are + * tuned. for now, use: + * + * AP off: 33% + * AP on: 100% + */ + +static void fan_slow(void) +{ + const int duty_pct = 33; + + ccprints("%s: speed %d%%", __func__, duty_pct); + + pwm_enable(PWM_CH_FAN, 1); + pwm_set_duty(PWM_CH_FAN, duty_pct); +} + +static void fan_max(void) +{ + const int duty_pct = 100; + + ccprints("%s: speed %d%%", __func__, duty_pct); + + pwm_enable(PWM_CH_FAN, 1); + pwm_set_duty(PWM_CH_FAN, duty_pct); +} + +DECLARE_HOOK(HOOK_INIT, fan_slow, HOOK_PRIO_DEFAULT); +DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, fan_slow, HOOK_PRIO_DEFAULT); +DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, fan_slow, HOOK_PRIO_DEFAULT); +DECLARE_HOOK(HOOK_CHIPSET_RESET, fan_max, HOOK_PRIO_FIRST); +DECLARE_HOOK(HOOK_CHIPSET_RESUME, fan_max, HOOK_PRIO_DEFAULT); + +#endif /* CONFIG_FANS */ |