diff options
Diffstat (limited to 'src/soc/intel/apollolake/pmutil.c')
| -rw-r--r-- | src/soc/intel/apollolake/pmutil.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/src/soc/intel/apollolake/pmutil.c b/src/soc/intel/apollolake/pmutil.c index 80aaf715af..c88e5ae8bf 100644 --- a/src/soc/intel/apollolake/pmutil.c +++ b/src/soc/intel/apollolake/pmutil.c @@ -29,6 +29,7 @@ #include <soc/pm.h> #include <device/device.h> #include <device/pci.h> +#include <timer.h> #include <vboot/vboot_common.h> #include "chip.h" @@ -306,6 +307,8 @@ int acpi_get_gpe(int gpe) { int bank; uint32_t mask, sts; + struct stopwatch sw; + int rc = 0; if (gpe < 0 || gpe > GPE0_DW3_31) return -1; @@ -313,12 +316,20 @@ int acpi_get_gpe(int gpe) bank = gpe / 32; mask = 1 << (gpe % 32); - sts = inl(ACPI_PMIO_BASE + GPE0_STS(bank)); - if (sts & mask) { - outl(mask, ACPI_PMIO_BASE + GPE0_STS(bank)); - return 1; - } - return 0; + /* Wait up to 1ms for GPE status to clear */ + stopwatch_init_msecs_expire(&sw, 1); + do { + if (stopwatch_expired(&sw)) + return rc; + + sts = inl(ACPI_PMIO_BASE + GPE0_STS(bank)); + if (sts & mask) { + outl(mask, ACPI_PMIO_BASE + GPE0_STS(bank)); + rc = 1; + } + } while (sts & mask); + + return rc; } void clear_pmc_status(void) |