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authorSteve Sakoman <steve@sakoman.com>2010-11-04 12:04:52 -0700
committerJohn Rigby <john.rigby@linaro.org>2011-06-22 11:28:27 -0600
commit046ccdd45c0ad33f28e1a1048e2cb60a0680d125 (patch)
tree35a939823c1f5ac23a1549ebf521d9d60a96ecd6
parentbcde7c4205a5e19fe91cb1d9658f21ecd80ecb14 (diff)
downloadu-boot-linaro-natty-046ccdd45c0ad33f28e1a1048e2cb60a0680d125.tar.gz
ARMV7: Overo: Automatically set clock rate to maximum if mpurate env variable is "auto"
The maximum clock rate for the OMAP3 processors on Overo depends on the processor type and revision. This patch sets the clock rate to the spec sheet maximum if the mpurate environment variable is set to "auto". Otherwise it passes the mpurate variable unchanged on the kernel command line. Signed-off-by: Steve Sakoman <steve.sakoman@linaro.org>
-rw-r--r--board/overo/overo.c16
-rw-r--r--include/configs/omap3_overo.h2
2 files changed, 17 insertions, 1 deletions
diff --git a/board/overo/overo.c b/board/overo/overo.c
index 4eafdb1df..40512a997 100644
--- a/board/overo/overo.c
+++ b/board/overo/overo.c
@@ -281,6 +281,22 @@ int misc_init_r(void)
dieid_num_r();
+ if (strcmp(getenv("mpurate"), "auto") == 0)
+ switch (get_cpu_family()) {
+ case CPU_OMAP34XX:
+ if ((get_cpu_rev() >= CPU_3XX_ES31) &&
+ (get_sku_id() == SKUID_CLK_720MHZ))
+ setenv("mpurate", "720");
+ else
+ setenv("mpurate", "600");
+ break;
+ case CPU_OMAP36XX:
+ setenv("mpurate", "720");
+ break;
+ default:
+ setenv("mpurate", "500");
+ }
+
return 0;
}
diff --git a/include/configs/omap3_overo.h b/include/configs/omap3_overo.h
index 242b317d0..112e6f8b9 100644
--- a/include/configs/omap3_overo.h
+++ b/include/configs/omap3_overo.h
@@ -157,7 +157,7 @@
#define CONFIG_EXTRA_ENV_SETTINGS \
"loadaddr=0x82000000\0" \
"console=ttyS2,115200n8\0" \
- "mpurate=500\0" \
+ "mpurate=auto\0" \
"vram=12M\0" \
"dvimode=1024x768MR-16@60\0" \
"defaultdisplay=dvi\0" \