Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 420/434] x86/intel: Disable HPET on Intel Coffee Lake H platforms | Date | Sun, 29 Dec 2019 18:27:53 +0100 |
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From: Kai-Heng Feng <kai.heng.feng@canonical.com>
commit f8edbde885bbcab6a2b4a1b5ca614e6ccb807577 upstream.
Coffee Lake H SoC has similar behavior as Coffee Lake, skewed HPET timer once the SoCs entered PC10.
So let's disable HPET on CFL-H platforms.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: bp@alien8.de Cc: feng.tang@intel.com Cc: harry.pan@intel.com Cc: hpa@zytor.com Link: https://lkml.kernel.org/r/20191129062303.18982-1-kai.heng.feng@canonical.com Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- arch/x86/kernel/early-quirks.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/arch/x86/kernel/early-quirks.c +++ b/arch/x86/kernel/early-quirks.c @@ -710,6 +710,8 @@ static struct chipset early_qrk[] __init */ { PCI_VENDOR_ID_INTEL, 0x0f00, PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, force_disable_hpet}, + { PCI_VENDOR_ID_INTEL, 0x3e20, + PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, force_disable_hpet}, { PCI_VENDOR_ID_INTEL, 0x3ec4, PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, force_disable_hpet}, { PCI_VENDOR_ID_BROADCOM, 0x4331,
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