ARM: 5597/1: [PCI] reset all internal hardware prior PCI initialization

Make software reset to avoid freeze if PCI bus was messed up Signed-off-by: Yegor Yefremov <[email protected]> Acked-by: Andrew Victor <[email protected]> Signed-off-by: Russell King <[email protected]>
RyanHsu · Jul 30, 2009 · 320145f · 320145f
1 parent 0a52ac8
commit 320145f
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/arch/arm/mach-ks8695/pci.c b/arch/arm/mach-ks8695/pci.c
@@ -245,6 +245,9 @@ static int ks8695_pci_fault(unsigned long addr, unsigned int fsr, struct pt_regs
 
 static void __init ks8695_pci_preinit(void)
 {
+	/* make software reset to avoid freeze if PCI bus was messed up */
+	__raw_writel(0x80000000, KS8695_PCI_VA + KS8695_PBCS);
+
 	/* stage 1 initialization, subid, subdevice = 0x0001 */
 	__raw_writel(0x00010001, KS8695_PCI_VA + KS8695_CRCSID);