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hw23: add shutdown on power-up when ignition is down. 

BugzID: 73163

Signed-off-by: Lucien Mueller <lucien.mueller@netmodule.com>
This commit is contained in:
Lucien Mueller 2021-06-09 14:52:15 +02:00
parent 5cdce0ed93
commit 68ad3ed097
1 changed files with 49 additions and 0 deletions
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49
board/netmodule/imx8_nmhw23/imx8_nmhw23.c
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@ -559,6 +559,51 @@ int board_mmc_get_env_dev(int devno)
return devno; return devno;
} }
static void powerdown(void)
{
/* Final call, will not return */
(void)da9063_set_reg(PMIC_REG_CONTROL_A, 0x00);
puts("ERROR: PMIC power down failed\n");
for (;;) {}
}
static void stop_if_ignition_is_off(void)
{
uint8_t state = 0x00;
int ret;
ret = da9063_get_reg(PMIC_REG_STATUS_A, &state);
if (ret == 0) {
if ((state & PMIC_REG_STATUS_A_COMP1V2_MASK) == PMIC_REG_STATUS_A_COMP1V2_MASK) {
puts("Ignition : On\n");
}
else {
puts("Ignition : Off\n");
/*
* Ignition is off, if this is a power-on start, power down
* as this is considered an unwanted system start.
*/
/*
* There is a chance for a race condition, when ignition is enabled
* between the check above and here. In this case we should just reset
* not power down.
* Although the risk is minimal here due to the very short time interval
* we do the check. The same logic will have to be added in other
* components.
*/
ret = da9063_get_reg(PMIC_REG_EVENT_B, &state);
if ((ret == 0) && ((state & PMIC_REG_EVENT_COMP1V2_MASK) == 0)) {
powerdown();
}
else {
reset_cpu(0);
}
}
}
}
static void check_reset_reason(uint64_t reset_reason_shm_location) static void check_reset_reason(uint64_t reset_reason_shm_location)
{ {
volatile struct reset_registers* reset_regs = (struct reset_registers*)reset_reason_shm_location; volatile struct reset_registers* reset_regs = (struct reset_registers*)reset_reason_shm_location;
@ -695,6 +740,10 @@ static void check_reset_reason(uint64_t reset_reason_shm_location)
rr_start_reason_to_str(reset_regs->sr_events, strbuf, sizeof(strbuf)); rr_start_reason_to_str(reset_regs->sr_events, strbuf, sizeof(strbuf));
printf("\nStart Events: %s\n", strbuf); printf("\nStart Events: %s\n", strbuf);
if (sys_start_event & SR_POR) {
stop_if_ignition_is_off();
}
} }
static int _bd_init(void) static int _bd_init(void)