From e292ccde216e571faad475e4331c188f22a28182 Mon Sep 17 00:00:00 2001 From: Huacai Chen Date: Tue, 4 Nov 2014 14:15:31 +0800 Subject: MIPS: Loongson-3: Add RS780/SBX00 HPET support CPUFreq driver need external timer, so add hpet at first. In Loongson 3, only Core-0 can receive external interrupt. As a result, timekeeping cannot absolutely use HPET timer. We use a hybrid solution: Core-0 use HPET as its clock event device, but other cores still use MIPS; clock source is global and doesn't need interrupt, so use HPET. Signed-off-by: Huacai Chen Signed-off-by: Hongliang Tao Cc: John Crispin Cc: Steven J. Hill Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang Cc: Zhangjin Wu Patchwork: https://patchwork.linux-mips.org/patch/8329/ Signed-off-by: Ralf Baechle --- arch/mips/loongson/Kconfig | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'arch/mips/loongson/Kconfig') diff --git a/arch/mips/loongson/Kconfig b/arch/mips/loongson/Kconfig index 72f830ac0782..156de85b82cd 100644 --- a/arch/mips/loongson/Kconfig +++ b/arch/mips/loongson/Kconfig @@ -108,6 +108,18 @@ config CS5536_MFGPT If unsure, say Yes. +config RS780_HPET + bool "RS780/SBX00 HPET Timer" + depends on LOONGSON_MACH3X + select MIPS_EXTERNAL_TIMER + help + This option enables the hpet timer of AMD RS780/SBX00. + + If you want to enable the Loongson3 CPUFreq Driver, Please enable + this option at first, otherwise, You will get wrong system time. + + If unsure, say Yes. + config LOONGSON_SUSPEND bool default y -- cgit v1.2.3