static void mxs_handle_5v_conflict(void)
{
struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE;
uint32_t tmp;
setbits_le32(&power_regs->hw_power_vddioctrl,
POWER_VDDIOCTRL_BO_OFFSET_MASK);
for (;;) {
tmp = readl(&power_regs->hw_power_sts);
if (tmp & POWER_STS_VDDIO_BO) {
/*
* VDDIO has a brownout, then the VDD5V_GT_VDDIO becomes
* unreliable
*/
mxs_powerdown();
break;
}
if (tmp & POWER_STS_VDD5V_GT_VDDIO) {
mxs_boot_valid_5v();
break;
} else {
mxs_powerdown();
break;
}
if (tmp & POWER_STS_PSWITCH_MASK) {
mxs_batt_boot();
break;
}
}
}
/**
* mxs_handle_5v_conflict() - Test if the 5V input is reliable
*
* This function tests if the 5V input can reliably supply the system. If it
* can, then proceed to configuring the system to boot from 5V source, otherwise
* try booting from battery supply. If we can not boot from battery supply
* either, shut down the system.
*/
static void mxs_handle_5v_conflict(void)
{
struct mxs_power_regs *power_regs =
(struct mxs_power_regs *)MXS_POWER_BASE;
uint32_t tmp;
debug("SPL: Resolving 5V conflict\n");
setbits_le32(&power_regs->hw_power_vddioctrl,
POWER_VDDIOCTRL_BO_OFFSET_MASK);
for (;;) {
tmp = readl(&power_regs->hw_power_sts);
if (tmp & POWER_STS_VDDIO_BO) {
/*
* VDDIO has a brownout, then the VDD5V_GT_VDDIO becomes
* unreliable
*/
debug("SPL: VDDIO has a brownout\n");
mxs_powerdown();
break;
}
if (tmp & POWER_STS_VDD5V_GT_VDDIO) {
debug("SPL: POWER_STS_VDD5V_GT_VDDIO is set\n");
mxs_boot_valid_5v();
break;
} else {
debug("SPL: POWER_STS_VDD5V_GT_VDDIO is not set\n");
mxs_powerdown();
break;
}
/*
* TODO: I can't see this being reached. We'll either
* powerdown or boot from a stable 5V supply.
*/
if (tmp & POWER_STS_PSWITCH_MASK) {
debug("SPL: POWER_STS_PSWITCH_MASK is set\n");
mxs_batt_boot();
break;
}
}
}