linux-kernel - [PATCH v2 5/5] MIPS: Loongson64: Mark RS780 HPET as broken

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Message-Id: <20200420134536.210475-5-jiaxun.yang@flygoat.com>
Date:   Mon, 20 Apr 2020 21:45:29 +0800
From:   Jiaxun Yang <jiaxun.yang@...goat.com>
To:     linux-mips@...r.kernel.org
Cc:     Jiaxun Yang <jiaxun.yang@...goat.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Rob Herring <robh+dt@...nel.org>,
        Huacai Chen <chenhc@...ote.com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 5/5] MIPS: Loongson64: Mark RS780 HPET as broken

This driver is using some dangerous hack to set MMIO address for HPET,
which might break systems with other kinds of PCH.

Also, as Loongson-3 cpufreq driver never appeared in mainline,
this driver rarely got used.

So we temporarily mark it as broken until we find a better solution.

Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
---
 arch/mips/loongson64/Kconfig | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/arch/mips/loongson64/Kconfig b/arch/mips/loongson64/Kconfig
index c386b8a3c753..517f1f8e81fb 100644
--- a/arch/mips/loongson64/Kconfig
+++ b/arch/mips/loongson64/Kconfig
@@ -4,14 +4,12 @@ if MACH_LOONGSON64
 config RS780_HPET
 	bool "RS780/SBX00 HPET Timer"
 	depends on MACH_LOONGSON64
+	depends on BROKEN
 	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.
-
+	  Note: This driver is doing some dangerous hack. Please only enable
+	  it on RS780E systems.
 
 endif # MACH_LOONGSON64
-- 
2.26.0.rc2