[U-Boot-Users] PATCH: CPC0_PCI initialization

[Tolunay Orkun <listmember@orkun.us>]

This was discussed in the list a while ago but a patch was not submitted 
AFAIK. I've come up with a patch that does not break any existing boards and 
naming of the macro is in line with other U-Boot macros for similar settings.

Re: http://sf.net/mailarchive/message.php?msg_id=14093274
Re: http://sf.net/mailarchive/message.php?msg_id=14095552

I am currently involved with bring-up of an 405EP based board. For our
board we do actually need CPC0_PCI[SPE] set to "1" to configure
PerWE*/PCI_INT* as PerWE* so write cycles to our flash could be take place 
(even for just CFI detection)

CHANGELOG:

* (ppc405ep) Add support for board configuration of CPC0_PCI register
   This is needed to be able to configure PerWE*/PCI_INT* pin as PerWE*

Sign-off-by: Tolunay Orkun <listmember@orkun.us>

diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S
index 948de43..316285a 100644
--- a/cpu/ppc4xx/start.S
+++ b/cpu/ppc4xx/start.S
@@ -1526,7 +1526,8 @@ ppc405ep_init:
  	mtdcr	ebccfgd,r3
  #endif

-	addi	r3,0,CPC0_PCI_HOST_CFG_EN
+#ifndef CFG_CPC0_PCI
+	li	r3,CPC0_PCI_HOST_CFG_EN
  #ifdef CONFIG_BUBINGA
  	/*
  	!-----------------------------------------------------------------------
@@ -1541,6 +1542,9 @@ ppc405ep_init:
  	beq	..pci_cfg_set		  /* if not set, then bypass reg write*/
  #endif
  	ori	r3,r3,CPC0_PCI_ARBIT_EN
+#else
+	li	r3,CFG_CPC0_PCI
+#endif
  ..pci_cfg_set:
  	mtdcr	CPC0_PCI, r3		 /* Enable internal arbiter*/