From d6bb5495f94a6675b30e21d80c1c09559b2309ab Mon Sep 17 00:00:00 2001 From: Shaunak Saha Date: Mon, 22 Aug 2016 21:55:23 -0700 Subject: intel/apollolake: Add power management utility function This patch adds a power management utility function to clear wake status bits in ACPI GPE0 registers. We need to call this function before going to sleep from common smi handler function. BUG=chrome-os-partner:55583 BRANCH=None TEST=Verified that system goes to sleep on lidclose and powerd_dbus_suspend command issued from built-in keyboard. Change-Id: Icd095d377c82f2e154f2e2db773f737aa49cda64 Signed-off-by: Shaunak Saha Reviewed-on: https://review.coreboot.org/16298 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/soc/intel/apollolake/pmutil.c | 10 ++++++++++ 1 file changed, 10 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 aaa4018683..39edc45886 100644 --- a/src/soc/intel/apollolake/pmutil.c +++ b/src/soc/intel/apollolake/pmutil.c @@ -246,6 +246,16 @@ void disable_all_gpe(void) disable_gpe(~0); } +/* Clear the gpio gpe0 status bits in ACPI registers */ +void clear_gpi_gpe_sts(void) +{ + int i; + + for (i = 1; i < GPE0_REG_MAX; i++) { + uint32_t gpe_sts = inl(ACPI_PMIO_BASE + GPE0_STS(i)); + outl(gpe_sts, ACPI_PMIO_BASE + GPE0_STS(i)); + } +} static uint32_t reset_gpe_status(void) { -- cgit v1.2.3