From 980791e2b8bc9888319b048ff340cf1585b5143e Mon Sep 17 00:00:00 2001
From: Sebastien Bourdeauducq <sb@m-labs.hk>
Date: Wed, 1 Apr 2015 14:33:12 +0800
Subject: [PATCH] soc: remove ns function

---
 misoclib/soc/__init__.py |  7 -------
 targets/mlabs_video.py   | 12 +++++-------
 2 files changed, 5 insertions(+), 14 deletions(-)

diff --git a/misoclib/soc/__init__.py b/misoclib/soc/__init__.py
index 2e2a1f230..21a0f1d78 100644
--- a/misoclib/soc/__init__.py
+++ b/misoclib/soc/__init__.py
@@ -1,6 +1,5 @@
 import os, struct
 from operator import itemgetter
-from math import ceil
 
 from migen.fhdl.std import *
 from migen.bank import csrgen
@@ -188,9 +187,3 @@ class SoC(Module):
 			for k, v in sorted(self.interrupt_map.items(), key=itemgetter(1)):
 				if hasattr(self, k):
 					self.comb += self.cpu_or_bridge.interrupt[v].eq(getattr(self, k).ev.irq)
-
-	def ns(self, t, margin=True):
-		clk_period_ns = 1000000000/self.clk_freq
-		if margin:
-			t += clk_period_ns/2
-		return ceil(t/clk_period_ns)
diff --git a/targets/mlabs_video.py b/targets/mlabs_video.py
index d83d955bb..34abebfeb 100644
--- a/targets/mlabs_video.py
+++ b/targets/mlabs_video.py
@@ -1,5 +1,6 @@
 import os
 from fractions import Fraction
+from math import ceil
 
 from migen.fhdl.std import *
 from mibuild.generic_platform import ConstraintError
@@ -47,21 +48,18 @@ class BaseSoC(SDRAMSoC):
 			self.submodules.ddrphy = s6ddrphy.S6DDRPHY(platform.request("ddram"), MT46V32M16(self.clk_freq),
 				rd_bitslip=0, wr_bitslip=3, dqs_ddr_alignment="C1")
 			self.register_sdram_phy(self.ddrphy)
-
 			self.comb += [
 				self.ddrphy.clk4x_wr_strb.eq(self.crg.clk4x_wr_strb),
 				self.ddrphy.clk4x_rd_strb.eq(self.crg.clk4x_rd_strb)
 			]
 
-		self.submodules.norflash = norflash16.NorFlash16(platform.request("norflash"),
-			self.ns(110), self.ns(50))
-		self.flash_boot_address = 0x001a0000
-
-		# If not in ROM, BIOS is in // NOR flash
 		if not self.with_integrated_rom:
+			clk_period_ns = 1000000000/self.clk_freq
+			self.submodules.norflash = norflash16.NorFlash16(platform.request("norflash"),
+				ceil(110/clk_period_ns), ceil(50/clk_period_ns))
+			self.flash_boot_address = 0x001a0000
 			self.register_rom(self.norflash.bus)
 
-
 		platform.add_platform_command("""
 INST "mxcrg/wr_bufpll" LOC = "BUFPLL_X0Y2";
 INST "mxcrg/rd_bufpll" LOC = "BUFPLL_X0Y3";