From 3d43a7c111d00be246160a04023fe438ae0cac57 Mon Sep 17 00:00:00 2001 From: Duncan Laurie Date: Mon, 19 Sep 2016 12:05:49 -0700 Subject: 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: Id885e98d48c2133a868da19eca3360e2dfb82e84 Signed-off-by: Duncan Laurie --- src/soc/intel/apollolake/pmutil.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'src/soc/intel/apollolake/pmutil.c') 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 #include #include #include @@ -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; -- cgit v1.2.3