[PATCH 11/14] omap4: Fix silicon version detection for early samples
From: Santosh Shilimkar <hidden>
Date: 2010-09-17 09:47:55
Also in:
linux-omap
Subsystem:
arm port, omap2+ support, the rest · Maintainers:
Russell King, Aaro Koskinen, Andreas Kemnade, Kevin Hilman, Roger Quadros, Tony Lindgren, Linus Torvalds
Few initial omap4 es2 samples IDCODE is same as es1. This patch uses ARM cpuid register to detect the ES version for such samples Signed-off-by: Santosh Shilimkar <redacted> --- arch/arm/mach-omap2/id.c | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
index ae70ae9..0412233 100644
--- a/arch/arm/mach-omap2/id.c
+++ b/arch/arm/mach-omap2/id.c@@ -308,6 +308,15 @@ static void __init omap4_check_revision(void) hawkeye = (idcode >> 12) & 0xffff; rev = (idcode >> 28) & 0xff; + /* + * Few initial ES2.0 samples IDCODE is same as ES1.0 + * Use ARM register to detect the correct ES version + */ + if (!rev) { + idcode = read_cpuid(CPUID_ID); + rev = (idcode & 0xf) - 1; + } + switch (hawkeye) { case 0xb852: switch (rev) {
--
1.6.0.4