Hi Andy, On Sat, Jul 22, 2017 at 3:32 AM, Andy Shevchenko <andriy.shevche...@linux.intel.com> wrote: > If ACPI HW reduced bit in FADT is set we should ignore any ACPI hardware > communications. > > Signed-off-by: Andy Shevchenko <andriy.shevche...@linux.intel.com> > --- > arch/x86/lib/acpi_table.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c > index da6014fb41..3eb101105b 100644 > --- a/arch/x86/lib/acpi_table.c > +++ b/arch/x86/lib/acpi_table.c > @@ -463,6 +463,10 @@ ulong write_acpi_tables(ulong start) > > debug("ACPI: done\n"); > > + /* Don't touch ACPI hardware on HW reduced platforms */ > + if (fadt->flags & ACPI_FADT_HW_REDUCED_ACPI) > + return current; > +
Reviewed-by: Bin Meng <bmeng...@gmail.com> I assume this is needed on Intel Edison. If that's the case, will you support S3 resume on Edison? And if yes, I believe we will need update acpi_resume() to add the same check there? > /* > * Other than waiting for OSPM to request us to switch to ACPI mode, > * do it by ourselves, since SMI will not be triggered. > -- Regards, Bin _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot