diff options
| author | Duncan Laurie <dlaurie@chromium.org> | 2016-09-19 12:05:49 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2016-09-21 10:46:35 +0200 |
| commit | 2e79009503bcb0bc324ca60f9d4a9121dcdcbf84 (patch) | |
| tree | 078f74337a9c139e20022c9314c362ad17606351 /src/soc/intel/apollolake/pmutil.c | |
| parent | a673d1cd2d4d74fdc6f373952f14667f51908f1d (diff) | |
soc/intel/apollolake: Add function to read and clear GPE status
Implement the generic acpi_get_gpe() function to read and clear
the GPE status for a specific GPE.
Tested by watching GPE status in a loop while generating interrupts
manually from the EC console.
BUG=chrome-os-partner:53336
Change-Id: I482ff52051a48441333b573f1cd0fa7f7579a6ab
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/16671
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/soc/intel/apollolake/pmutil.c')
| -rw-r--r-- | src/soc/intel/apollolake/pmutil.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/pmutil.c b/src/soc/intel/apollolake/pmutil.c index 2aef18c8e6..56bb33dc40 100644 --- a/src/soc/intel/apollolake/pmutil.c +++ b/src/soc/intel/apollolake/pmutil.c @@ -17,6 +17,7 @@ #define __SIMPLE_DEVICE__ +#include <arch/acpi.h> #include <arch/io.h> #include <console/console.h> #include <cbmem.h> @@ -301,6 +302,26 @@ uint32_t clear_gpe_status(void) return print_gpe_sts(reset_gpe_status()); } +/* Read and clear GPE status (defined in arch/acpi.h) */ +int acpi_get_gpe(int gpe) +{ + int bank; + uint32_t mask, sts; + + if (gpe < 0 || gpe > GPE0_DW3_31) + return -1; + + 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; +} + void clear_pmc_status(void) { uint32_t prsts; |