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authorStephen Warren <swarren@nvidia.com>2015-08-19 15:15:41 -0600
committerTom Warren <twarren@nvidia.com>2015-09-16 16:10:22 -0700
commitbfac08472371d4d6d4fa56972b0e1166f780633a (patch)
tree7ca7ad2530ef0ab2e51164021d00c25f050618a0 /include
parenta6b2daffdedf0664f7b49eb20c81f1adada6bd51 (diff)
ARM: tegra: fix COUNTER_FREQUENCY for T210
While T210 boards all have 38.4MHz crystals, per the TRM, the only supported configuration is to divide the crystal frequency by 2 to generate clk_m, which is what feeds the ARM generic timers amongst other things. Fix the value of COUNTER_FREQUENCY to reflect this divide-by-2. When I queried the 19.2 value in Tom's original T210 patches, I wasn't aware of this extra divide-by-2, and didn't notice any effect from the incorrect value, since its only used if U-Boot is booted in EL3, whereas I'm booting it in EL2. Reported-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com>
Diffstat (limited to 'include')
-rw-r--r--include/configs/e2220-1170.h3
-rw-r--r--include/configs/p2371-0000.h3
-rw-r--r--include/configs/p2371-2180.h3
-rw-r--r--include/configs/p2571.h3
4 files changed, 8 insertions, 4 deletions
diff --git a/include/configs/e2220-1170.h b/include/configs/e2220-1170.h
index dff3f2a357..3bc60637ed 100644
--- a/include/configs/e2220-1170.h
+++ b/include/configs/e2220-1170.h
@@ -60,6 +60,7 @@
#include "tegra-common-usb-gadget.h"
#include "tegra-common-post.h"
-#define COUNTER_FREQUENCY 38400000
+/* Crystal is 38.4MHz. clk_m runs at half that rate */
+#define COUNTER_FREQUENCY 19200000
#endif /* _E2220_1170_H */
diff --git a/include/configs/p2371-0000.h b/include/configs/p2371-0000.h
index 9d7b650d98..397a0ef8ae 100644
--- a/include/configs/p2371-0000.h
+++ b/include/configs/p2371-0000.h
@@ -60,6 +60,7 @@
#include "tegra-common-usb-gadget.h"
#include "tegra-common-post.h"
-#define COUNTER_FREQUENCY 38400000
+/* Crystal is 38.4MHz. clk_m runs at half that rate */
+#define COUNTER_FREQUENCY 19200000
#endif /* _P2371_0000_H */
diff --git a/include/configs/p2371-2180.h b/include/configs/p2371-2180.h
index 378d5a905e..f311ae9e7d 100644
--- a/include/configs/p2371-2180.h
+++ b/include/configs/p2371-2180.h
@@ -60,6 +60,7 @@
#include "tegra-common-usb-gadget.h"
#include "tegra-common-post.h"
-#define COUNTER_FREQUENCY 38400000
+/* Crystal is 38.4MHz. clk_m runs at half that rate */
+#define COUNTER_FREQUENCY 19200000
#endif /* _P2371_2180_H */
diff --git a/include/configs/p2571.h b/include/configs/p2571.h
index 356c941a77..3bf9888472 100644
--- a/include/configs/p2571.h
+++ b/include/configs/p2571.h
@@ -61,7 +61,8 @@
#include "tegra-common-usb-gadget.h"
#include "tegra-common-post.h"
-#define COUNTER_FREQUENCY 38400000
+/* Crystal is 38.4MHz. clk_m runs at half that rate */
+#define COUNTER_FREQUENCY 19200000
#define CONFIG_OF_BOARD_SETUP
#endif /* _P2571_H */