diff options
| author | Matt DeVillier <matt.devillier@gmail.com> | 2020-08-12 10:29:11 -0500 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2020-08-14 00:51:23 +0000 |
| commit | 67f80fb8f56a1ff393306fac0d2930a41e3d2a19 (patch) | |
| tree | 775f05ac05d23e42c6344f0d24ac1ee220ad4a20 /src | |
| parent | deb80ea8071d38a15fa9c06be0e069be55672b25 (diff) | |
superio/ite/common: Add support for closed-loop mode
Add support for tachometer closed loop mode, and programming
of initial RPM vs initial PWM value.
Change-Id: Idff29331c979f8518021103b6f8d19e75e657e3a
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44418
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Diffstat (limited to 'src')
| -rw-r--r-- | src/superio/ite/common/env_ctrl.c | 18 | ||||
| -rw-r--r-- | src/superio/ite/common/env_ctrl.h | 9 | ||||
| -rw-r--r-- | src/superio/ite/common/env_ctrl_chip.h | 2 |
3 files changed, 23 insertions, 6 deletions
diff --git a/src/superio/ite/common/env_ctrl.c b/src/superio/ite/common/env_ctrl.c index 8668110713..c87f32d3e0 100644 --- a/src/superio/ite/common/env_ctrl.c +++ b/src/superio/ite/common/env_ctrl.c @@ -128,13 +128,19 @@ static void fan_smartconfig(const u16 base, const u8 fan, pwm_ctrl = ITE_EC_FAN_CTL_PWM_MODE_AUTOMATIC; pwm_ctrl |= ITE_EC_FAN_CTL_TEMPIN(conf->tmpin); - pwm_start = ITE_EC_FAN_CTL_PWM_START_DUTY(conf->pwm_start); - - if (CONFIG(SUPERIO_ITE_ENV_CTRL_7BIT_SLOPE_REG)) { - pwm_auto = conf->slope & 0x7f; - } else { - pwm_start |= ITE_EC_FAN_CTL_PWM_SLOPE_BIT6(conf->slope); + if (conf->clsd_loop) { + pwm_ctrl |= ITE_EC_FAN_PWM_CLSD_LOOP; + pwm_start = ITE_EC_FAN_CTL_PWM_START_RPM(conf->rpm_start); pwm_auto = ITE_EC_FAN_CTL_PWM_SLOPE_LOWER(conf->slope); + } else { + pwm_start = ITE_EC_FAN_CTL_PWM_START_DUTY(conf->pwm_start); + + if (CONFIG(SUPERIO_ITE_ENV_CTRL_7BIT_SLOPE_REG)) { + pwm_auto = conf->slope & 0x7f; + } else { + pwm_start |= ITE_EC_FAN_CTL_PWM_SLOPE_BIT6(conf->slope); + pwm_auto = ITE_EC_FAN_CTL_PWM_SLOPE_LOWER(conf->slope); + } } if (conf->smoothing) diff --git a/src/superio/ite/common/env_ctrl.h b/src/superio/ite/common/env_ctrl.h index 7bce8097f5..145c6c13e9 100644 --- a/src/superio/ite/common/env_ctrl.h +++ b/src/superio/ite/common/env_ctrl.h @@ -91,6 +91,7 @@ ? (0x1e + ((x)-4)) \ : (0x15 + ((x)-1)) \ ) +#define ITE_EC_FAN_PWM_CLSD_LOOP (1 << 2) #if CONFIG(SUPERIO_ITE_ENV_CTRL_5FANS) #define ITE_EC_FAN_CTL_TEMPIN_MASK (7 << 3) @@ -110,6 +111,13 @@ ? ITE_EC_FAN_MAX_PWM \ : (_p * ITE_EC_FAN_MAX_PWM) / 100; \ }) +#define ITE_EC_FAN_CTL_PWM_RPM(p) \ + ({ \ + const unsigned int _p = p; \ + (_p >= 4080) \ + ? 0xFF \ + : (_p / 16); \ + }) #define ITE_EC_HIGH_TEMP_LIMIT(x) (0x40 + ((x-1) * 2)) #define ITE_EC_LOW_TEMP_LIMIT(x) (0x41 + ((x-1) * 2)) @@ -178,6 +186,7 @@ static const u8 ITE_EC_TEMP_ADJUST[] = { 0x56, 0x57, 0x59 }; /* Common for ITE_EC_FAN_CTL_PWM_START */ #define ITE_EC_FAN_CTL_PWM_SLOPE_BIT6(s) (((s) & 0x40) << 1) #define ITE_EC_FAN_CTL_PWM_START_DUTY(p) ITE_EC_FAN_CTL_PWM_DUTY(p) +#define ITE_EC_FAN_CTL_PWM_START_RPM(p) ITE_EC_FAN_CTL_PWM_RPM(p) /* Common for ITE_EC_FAN_CTL_PWM_AUTO */ #define ITE_EC_FAN_CTL_AUTO_SMOOTHING_EN (1 << 7) diff --git a/src/superio/ite/common/env_ctrl_chip.h b/src/superio/ite/common/env_ctrl_chip.h index fa896e4074..2bb0780c53 100644 --- a/src/superio/ite/common/env_ctrl_chip.h +++ b/src/superio/ite/common/env_ctrl_chip.h @@ -60,6 +60,8 @@ struct ite_ec_fan_smartconfig { u8 smoothing; /* enable smoothing */ u8 pwm_start; /* start at this duty cycle (%) */ u8 slope; /* increase duty cycle by `slope`%/°C */ + u8 clsd_loop; /* tachometer closed-loop mode enable */ + u16 rpm_start; /* start at this RPM (clsd_loop = 1) */ }; struct ite_ec_fan_config { |