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cpu/samd21: Switch EIC clock to slow speed on STANDBY mode

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This commit is contained in:
Benjamin Valentin 2020-02-21 18:05:35 +01:00 committed by Juergen Fitschen
parent 43ff72ad56
commit 442ddc1346
1 changed files with 22 additions and 1 deletions
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23
cpu/sam0_common/periph/gpio.c
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@ -242,7 +242,18 @@ int gpio_init_int(gpio_t pin, gpio_mode_t mode, gpio_flank_t flank,
}
inline static void reenable_eic(gpio_eic_clock_t clock) {
#if !defined(CPU_SAMD21)
#if defined(CPU_SAMD21)
if (clock == _EIC_CLOCK_SLOW) {
GCLK->CLKCTRL.reg = EIC_GCLK_ID
| GCLK_CLKCTRL_CLKEN
| GCLK_CLKCTRL_GEN(SAM0_GCLK_32KHZ);
} else {
GCLK->CLKCTRL.reg = EIC_GCLK_ID
| GCLK_CLKCTRL_CLKEN
| GCLK_CLKCTRL_GEN(SAM0_GCLK_MAIN);
}
while (GCLK->STATUS.bit.SYNCBUSY) {}
#else
uint32_t ctrla_reg = EIC_CTRLA_ENABLE;
EIC->CTRLA.reg = 0;
@ -266,6 +277,11 @@ void gpio_pm_cb_enter(int deep)
DEBUG_PUTS("gpio: switching EIC to slow clock");
reenable_eic(_EIC_CLOCK_SLOW);
}
#else
if (deep) {
DEBUG_PUTS("gpio: switching EIC to slow clock");
reenable_eic(_EIC_CLOCK_SLOW);
}
#endif
}
@ -278,6 +294,11 @@ void gpio_pm_cb_leave(int deep)
DEBUG_PUTS("gpio: switching EIC to fast clock");
reenable_eic(_EIC_CLOCK_FAST);
}
#else
if (deep) {
DEBUG_PUTS("gpio: switching EIC to fast clock");
reenable_eic(_EIC_CLOCK_FAST);
}
#endif
}