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power: Support non-INT power signal pins

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Optionally do polling for power signal pins
which are not set as INT pins.

BUG=b:64528567
BRANCH=none
TEST=boot scarlet rev1 with a non-INT power signal pin

Change-Id: I327753fcc0f1c6482c5f5eb3df28f67181b4eb62
Signed-off-by: Philip Chen <philipchen@google.com>
Reviewed-on: https://chromium-review.googlesource.com/611649
Commit-Ready: Philip Chen <philipchen@chromium.org>
Tested-by: Philip Chen <philipchen@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
This commit is contained in:
Philip Chen
2017-08-10 19:48:31 -07:00
committed by chrome-bot
parent 7a41d77b15
commit c556e8b3e2
1 changed files with 37 additions and 0 deletions
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37
power/rk3399.c
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@@ -53,6 +53,8 @@
#define IN_PGOOD_S0 (IN_PGOOD_S3 | IN_PGOOD_PP900_S0 | IN_PGOOD_AP)
/* This board can optionally wake-on-USB in S3 */
#define S3_USB_WAKE
/* This board has non-INT power signal pins */
#define POWER_SIGNAL_POLLING
#else
#define IN_PGOOD_S3 (IN_PGOOD_PP5000)
#define IN_PGOOD_S0 (IN_PGOOD_S3 | IN_PGOOD_AP | IN_PGOOD_SYS)
@@ -570,3 +572,38 @@ static void lid_changed(void)
}
DECLARE_HOOK(HOOK_LID_CHANGE, lid_changed, HOOK_PRIO_DEFAULT);
#endif
#ifdef POWER_SIGNAL_POLLING
/*
* Polling for non-INT power signal pins.
* Call power_signal_interrupt() when the GPIO status of those pins changes.
*/
static void power_signal_changed(void)
{
static uint8_t in_signals; /* Current power signal status */
uint8_t inew = 0;
const struct power_signal_info *s = power_signal_list;
int i;
BUILD_ASSERT(POWER_SIGNAL_COUNT <= 8);
for (i = 0; i < POWER_SIGNAL_COUNT; i++, s++) {
/* Skip if this is an INT pin. */
if (s->gpio < GPIO_IH_COUNT)
continue;
if (gpio_get_level(s->gpio) == s->level)
inew |= 1 << i;
}
if (inew != in_signals) {
/*
* Pass a fake power gpio_signal to power_signal_interrupt().
* Note that here we make power_signal_interrupt() reentrant.
*/
power_signal_interrupt(POWER_SIGNAL_COUNT);
in_signals = inew;
}
}
DECLARE_HOOK(HOOK_TICK, power_signal_changed, HOOK_PRIO_DEFAULT);
#endif