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authorStuart Menefy <stuart.menefy@st.com>2009-08-24 17:13:52 +0900
committerPaul Mundt <lethal@linux-sh.org>2009-08-24 17:13:52 +0900
commit7d9c035150897c2bebedae280505513dbdef2abc (patch)
tree266d81ab94b001c32ab10b9d078c0454c87436c3
parentfea966f7564205fcf5919af9bde031e753419c96 (diff)
sh: Read from CCN_PVR instead of ROM for delay.
Reading from the ROM is not a good idea as it could disturb some flash operation that it is in progress. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
-rw-r--r--arch/sh/include/asm/io.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index aeecf432d48..5be45ea4dfe 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -92,8 +92,12 @@
static inline void ctrl_delay(void)
{
-#ifdef P2SEG
+#ifdef CONFIG_CPU_SH4
+ __raw_readw(CCN_PVR);
+#elif defined(P2SEG)
__raw_readw(P2SEG);
+#else
+#error "Need a dummy address for delay"
#endif
}