From: Yegor Yefremov <yegorslists@googlemail.com>
Date: Thu, 9 Jul 2009 07:48:03 +0000 (+0100)
Subject: ARM: 5597/1: [PCI] reset all internal hardware prior PCI initialization
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=320145fac91955ee35a6af7e1c2b42388a17b3d8;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

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 <yegorslists@googlemail.com>
Acked-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/mach-ks8695/pci.c b/arch/arm/mach-ks8695/pci.c
index f5ebcc0fcab..78499667eb7 100644
--- 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);