linux-kernel - [PATCH 5/5] [RFC][PPC] Use DCR for arch ppc, and enable MMIO and NATIVE for virtex.

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Date:	Fri, 28 Mar 2008 09:20:37 -0700
From:	Stephen Neuendorffer <stephen.neuendorffer@...inx.com>
To:	linuxppc-dev@...inx.com, benh@...nel.crashing.org,
	jwboyer@...ux.vnet.ibm.com, sfr@...b.auug.org.au,
	grant.likely@...retlab.ca, git-dev@...inx.com,
	linux-kernel@...r.kernel.org
Cc:	Stephen Neuendorffer <stephen.neuendorffer@...inx.com>
Subject: [PATCH 5/5] [RFC][PPC] Use DCR for arch ppc, and enable MMIO and NATIVE for virtex.

Generally speaking, I'm not sure about the validity of this patch.  In
particular:

1) I'm not sure what architecture code relies on including
dcr support through ibm4xx.h.

2) I'm not sure how temporary the ifdef in
arch/powerpc/sysdev/Makefile really is.  Is it still needed or not?

However, this appears to work at least for the Virtex systems I've
tried.  In any event, I don't expect this to actually be sent to
mainline, since it's ARCH=ppc related, at least not in this form.

Unfortunately, the framebuffer driver won't work under ARCH=ppc
without this patch.
---
 arch/powerpc/sysdev/Makefile   |    2 --
 arch/ppc/Kconfig               |    6 +++++-
 arch/ppc/platforms/4xx/Kconfig |    2 ++
 include/asm-ppc/ibm4xx.h       |    1 -
 4 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile
index 15f3e85..c85525b 100644
--- a/arch/powerpc/sysdev/Makefile
+++ b/arch/powerpc/sysdev/Makefile
@@ -35,10 +35,8 @@ endif
 endif
 
 # Temporary hack until we have migrated to asm-powerpc
-ifeq ($(ARCH),powerpc)
 obj-$(CONFIG_CPM)		+= cpm_common.o
 obj-$(CONFIG_CPM2)		+= cpm2.o cpm2_pic.o
 obj-$(CONFIG_PPC_DCR)		+= dcr.o
 obj-$(CONFIG_8xx)		+= mpc8xx_pic.o cpm1.o
 obj-$(CONFIG_UCODE_PATCH)	+= micropatch.o
-endif
diff --git a/arch/ppc/Kconfig b/arch/ppc/Kconfig
index abc877f..81d6748 100644
--- a/arch/ppc/Kconfig
+++ b/arch/ppc/Kconfig
@@ -116,9 +116,13 @@ config PPC_DCR_NATIVE
 	bool
 	default n
 
+config PPC_DCR_MMIO
+	bool
+	default n
+
 config PPC_DCR
 	bool
-	depends on PPC_DCR_NATIVE
+	depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 	default y
 
 config PTE_64BIT
diff --git a/arch/ppc/platforms/4xx/Kconfig b/arch/ppc/platforms/4xx/Kconfig
index 76551b6..0430fc2 100644
--- a/arch/ppc/platforms/4xx/Kconfig
+++ b/arch/ppc/platforms/4xx/Kconfig
@@ -228,6 +228,8 @@ config XILINX_VIRTEX_4_FX
 
 config XILINX_VIRTEX
 	bool
+	select PPC_DCR_NATIVE
+	select PPC_DCR_MMIO
 
 config STB03xxx
 	bool
diff --git a/include/asm-ppc/ibm4xx.h b/include/asm-ppc/ibm4xx.h
index ed6891a..053a86b 100644
--- a/include/asm-ppc/ibm4xx.h
+++ b/include/asm-ppc/ibm4xx.h
@@ -15,7 +15,6 @@
 #define __ASM_IBM4XX_H__
 
 #include <asm/types.h>
-#include <asm/dcr.h>
 
 #ifdef CONFIG_40x
 
-- 
1.5.3.4-dirty


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