summaryrefslogtreecommitdiffstats
path: root/Documentation/arm/Sharp-LH/LPD7A40X
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/arm/Sharp-LH/LPD7A40X')
-rw-r--r--Documentation/arm/Sharp-LH/LPD7A40X16
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/arm/Sharp-LH/LPD7A40X b/Documentation/arm/Sharp-LH/LPD7A40X
new file mode 100644
index 000000000000..8c29a27e208f
--- /dev/null
+++ b/Documentation/arm/Sharp-LH/LPD7A40X
@@ -0,0 +1,16 @@
+README on Implementing Linux for the Logic PD LPD7A40X-10
+=========================================================
+
+- CPLD memory mapping
+
+ The board designers chose to use high address lines for controlling
+ access to the CPLD registers. It turns out to be a big waste
+ because we're using an MMU and must map IO space into virtual
+ memory. The result is that we have to make a mapping for every
+ register.
+
+- Serial Console
+
+ It may be OK not to use the serial console option if the user passes
+ the console device name to the kernel. This deserves some exploration.
+
OpenPOWER on IntegriCloud