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authorLennert Buytenhek <buytenh@wantstofly.org>2008-08-09 15:17:27 +0200
committerLennert Buytenhek <buytenh@marvell.com>2008-08-09 15:17:27 +0200
commitce72e36ed1a57ba086270039c7d6fac9bf1c5fbc (patch)
tree3fae8df5f9f582f46c8d25f1b6a98fadb27f76d8 /arch
parent6f088f1d215be5250582b974f83f0e3aa6ad3a28 (diff)
[ARM] Orion: support D0 5281 silicon
On D0 5281 SoCs, we need to disable the wait-for-interrupt instruction due to an erratum. Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: Nicolas Pitre <nico@marvell.com> Acked-by: Martin Michlmayr <tbm@cyrius.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-orion5x/common.c11
-rw-r--r--arch/arm/mach-orion5x/include/mach/orion5x.h1
2 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/mach-orion5x/common.c b/arch/arm/mach-orion5x/common.c
index b44f26d7613..8f2146bd8a9 100644
--- a/arch/arm/mach-orion5x/common.c
+++ b/arch/arm/mach-orion5x/common.c
@@ -382,6 +382,8 @@ static void __init orion5x_id(u32 *dev, u32 *rev, char **dev_name)
*dev_name = "MV88F5281-D2";
} else if (*rev == MV88F5281_REV_D1) {
*dev_name = "MV88F5281-D1";
+ } else if (*rev == MV88F5281_REV_D0) {
+ *dev_name = "MV88F5281-D0";
} else {
*dev_name = "MV88F5281-Rev-Unsupported";
}
@@ -416,6 +418,15 @@ void __init orion5x_init(void)
* Setup Orion address map
*/
orion5x_setup_cpu_mbus_bridge();
+
+ /*
+ * Don't issue "Wait for Interrupt" instruction if we are
+ * running on D0 5281 silicon.
+ */
+ if (dev == MV88F5281_DEV_ID && rev == MV88F5281_REV_D0) {
+ printk(KERN_INFO "Orion: Applying 5281 D0 WFI workaround.\n");
+ disable_hlt();
+ }
}
/*
diff --git a/arch/arm/mach-orion5x/include/mach/orion5x.h b/arch/arm/mach-orion5x/include/mach/orion5x.h
index f52a7d65bec..77978dbd5a9 100644
--- a/arch/arm/mach-orion5x/include/mach/orion5x.h
+++ b/arch/arm/mach-orion5x/include/mach/orion5x.h
@@ -73,6 +73,7 @@
#define MV88F5182_REV_A2 2
/* Orion-2 (88F5281) */
#define MV88F5281_DEV_ID 0x5281
+#define MV88F5281_REV_D0 4
#define MV88F5281_REV_D1 5
#define MV88F5281_REV_D2 6