summaryrefslogtreecommitdiff
path: root/arch/arm/plat-mxc
diff options
context:
space:
mode:
authorDaniel Mack <daniel@caiaq.de>2009-11-21 20:17:18 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2009-11-23 11:51:18 +0100
commit52939c03e53b151848da9e83fd839bddfda29e78 (patch)
tree01ac7de1d40e608ec5323f93dd9cec711ae1f4f4 /arch/arm/plat-mxc
parent2cc326833f616ee49f73be94d4bf0ab1bc9a72d9 (diff)
ARM: MX3: fix CPU revision number detection
The macro mx31_revision() used to take the global variable system_rev to determine the CPU revision number. However, this number is expected to be set by the bootloader and is usually zero (at least on my MX31 based boards here). More than that, it is usually taken to identify the board's revision, not the CPU's. Fix that by reading the the CPU's SREV register instead. Right now, mx31_read_cpu_rev() is called from mx31_clocks_init() which is admittedly not a good place for it. However, we need to enable the IIM clock first, and the clock code also has conditional code that depends on mx31_revision() returning the right thing. Signed-off-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/plat-mxc')
-rw-r--r--arch/arm/plat-mxc/include/mach/mx3x.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/arm/plat-mxc/include/mach/mx3x.h b/arch/arm/plat-mxc/include/mach/mx3x.h
index 8cedf29eee16..be69272407ad 100644
--- a/arch/arm/plat-mxc/include/mach/mx3x.h
+++ b/arch/arm/plat-mxc/include/mach/mx3x.h
@@ -260,11 +260,12 @@
#if !defined(__ASSEMBLY__) && !defined(__MXC_BOOT_UNCOMPRESS)
-extern unsigned int system_rev;
+extern unsigned int mx31_cpu_rev;
+extern void mx31_read_cpu_rev(void);
static inline int mx31_revision(void)
{
- return system_rev;
+ return mx31_cpu_rev;
}
#endif