linux-kernel - [PATCH 4/4 resend] [x86] : Add the RDC machine specific reboot fixup

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Date:	Thu, 18 Oct 2007 15:51:39 +0200
From:	Florian Fainelli <florian.fainelli@...ecomint.eu>
To:	linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 4/4 resend] [x86] : Add the RDC machine specific reboot fixup

The RDC R-321x SoC needs a reboot fixup which
uses its internal hardware watchdog set to
reset the CPU on next tick.

Signed-off-by: Florian Fainelli <florian.fainelli@...ecomint.eu>
---
 arch/x86/kernel/reboot_fixups_32.c |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)
---
diff --git a/arch/x86/kernel/reboot_fixups_32.c b/arch/x86/kernel/reboot_fixups_32.c
index 8b30b26..26e23fc 100644
--- a/arch/x86/kernel/reboot_fixups_32.c
+++ b/arch/x86/kernel/reboot_fixups_32.c
@@ -32,6 +32,19 @@ static void cs5536_warm_reset(struct pci_dev *dev)
 	udelay(50); /* shouldn't get here but be safe and spin a while */
 }
 
+static void rdc321x_reset(struct pci_dev *dev)
+{
+	unsigned i;
+	/* Voluntary reset the watchdog timer */
+	outl(0x80003840, 0xCF8);
+	/* Generate a CPU reset on next tick */
+	i = inl(0xCFC);
+	/* Use the minimum timer resolution */
+	i |= 0x1600;
+	outl(i, 0xCFC);
+	outb(1, 0x92);
+}
+
 struct device_fixup {
 	unsigned int vendor;
 	unsigned int device;
@@ -41,6 +54,7 @@ struct device_fixup {
 static struct device_fixup fixups_table[] = {
 { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY, cs5530a_warm_reset },
 { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA, cs5536_warm_reset },
+{ PCI_VENDOR_ID_RDC, PCI_DEVICE_ID_RDC_R6030, rdc321x_reset },
 };
 
 /*

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