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authorVineet Gupta <vgupta@synopsys.com>2013-01-23 17:24:17 +0530
committerVineet Gupta <vgupta@synopsys.com>2013-02-15 23:16:18 +0530
commit0208c96a9df98999dd150430b37983e9a003ea0a (patch)
tree57a8847060fa428d8a0617ffb1d2752a17b70787 /arch/arc
parent95461a64e9bf8dae80c0309a6dd90c3872548129 (diff)
ARC: Provide a default serial.h for uart drivers needing BASE_BAUD
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
-rw-r--r--arch/arc/include/asm/serial.h25
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/arc/include/asm/serial.h b/arch/arc/include/asm/serial.h
new file mode 100644
index 000000000000..4dff5a1e4128
--- /dev/null
+++ b/arch/arc/include/asm/serial.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _ASM_ARC_SERIAL_H
+#define _ASM_ARC_SERIAL_H
+
+/*
+ * early-8250 requires BASE_BAUD to be defined and includes this header.
+ * We put in a typical value:
+ * (core clk / 16) - i.e. UART samples 16 times per sec.
+ * Athough in multi-platform-image this might not work, specially if the
+ * clk driving the UART is different.
+ * We can't use DeviceTree as this is typically for early serial.
+ */
+
+#include <asm/clk.h>
+
+#define BASE_BAUD (arc_get_core_freq() / 16)
+
+#endif /* _ASM_ARC_SERIAL_H */