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pwm: Reload counters when they reach 0 #304

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merged 1 commit into from Oct 14, 2022
Merged

pwm: Reload counters when they reach 0 #304

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5 changes: 5 additions & 0 deletions src/board/system76/common/pwm.c
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Expand Up @@ -26,6 +26,11 @@ void pwm_init(void) {
// Turn off CPU fan (temperature control in peci_get_fan_duty)
DCR2 = 0;

#ifdef it5570e
// Reload counters when they reach 0 instead of immediately
PWMLCCR = 0xFF;
#endif

// Enable PWM
ZTIER = BIT(1);
}
5 changes: 5 additions & 0 deletions src/ec/ite/include/ec/pwm.h
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Expand Up @@ -62,4 +62,9 @@ volatile uint8_t __xdata __at(0x1823) ZTIER;
// Tachometer switch control register
volatile uint8_t __xdata __at(0x1848) TSWCTLR;

#ifdef it5570e
// PWM Load Counter Control Register
volatile uint8_t __xdata __at(0x185A) PWMLCCR;
#endif

#endif // _EC_PWM_H