targets/minispartan6: use S6PLL in CRG

litex/boards/targets/minispartan6.py

@@ -8,6 +8,7 @@ from migen.genlib.resetsync import AsyncResetSynchronizer
 
 from litex.boards.platforms import minispartan6
 
+from litex.soc.cores.clock import *
 from litex.soc.integration.soc_sdram import *
 from litex.soc.integration.builder import *
 
@@ -26,44 +27,10 @@ class _CRG(Module):
         self.cd_sys.clk.attr.add("keep")
         self.cd_sys_ps.clk.attr.add("keep")
 
-        f0 = 32*1000000
+        self.submodules.pll = pll = S6PLL(speedgrade=-1)
-        clk32 = platform.request("clk32")
+        pll.register_clkin(platform.request("clk32"), 32e6)
-        clk32a = Signal()
+        pll.create_clkout(self.cd_sys, clk_freq)
-        self.specials += Instance("IBUFG", i_I=clk32, o_O=clk32a)
+        pll.create_clkout(self.cd_sys_ps, clk_freq, phase=270)
-        clk32b = Signal()
-        self.specials += Instance("BUFIO2", p_DIVIDE=1,
-                                  p_DIVIDE_BYPASS="TRUE", p_I_INVERT="FALSE",
-                                  i_I=clk32a, o_DIVCLK=clk32b)
-        f = Fraction(int(clk_freq), int(f0))
-        n, m, p = f.denominator, f.numerator, 8
-        assert f0/n*m == clk_freq
-        pll_lckd = Signal()
-        pll_fb = Signal()
-        pll = Signal(6)
-        self.specials.pll = Instance("PLL_ADV", p_SIM_DEVICE="SPARTAN6",
-                                     p_BANDWIDTH="OPTIMIZED", p_COMPENSATION="INTERNAL",
-                                     p_REF_JITTER=.01, p_CLK_FEEDBACK="CLKFBOUT",
-                                     i_DADDR=0, i_DCLK=0, i_DEN=0, i_DI=0, i_DWE=0, i_RST=0, i_REL=0,
-                                     p_DIVCLK_DIVIDE=1, p_CLKFBOUT_MULT=m*p//n, p_CLKFBOUT_PHASE=0.,
-                                     i_CLKIN1=clk32b, i_CLKIN2=0, i_CLKINSEL=1,
-                                     p_CLKIN1_PERIOD=1000000000/f0, p_CLKIN2_PERIOD=0.,
-                                     i_CLKFBIN=pll_fb, o_CLKFBOUT=pll_fb, o_LOCKED=pll_lckd,
-                                     o_CLKOUT0=pll[0], p_CLKOUT0_DUTY_CYCLE=.5,
-                                     o_CLKOUT1=pll[1], p_CLKOUT1_DUTY_CYCLE=.5,
-                                     o_CLKOUT2=pll[2], p_CLKOUT2_DUTY_CYCLE=.5,
-                                     o_CLKOUT3=pll[3], p_CLKOUT3_DUTY_CYCLE=.5,
-                                     o_CLKOUT4=pll[4], p_CLKOUT4_DUTY_CYCLE=.5,
-                                     o_CLKOUT5=pll[5], p_CLKOUT5_DUTY_CYCLE=.5,
-                                     p_CLKOUT0_PHASE=0., p_CLKOUT0_DIVIDE=p//1,
-                                     p_CLKOUT1_PHASE=0., p_CLKOUT1_DIVIDE=p//1,
-                                     p_CLKOUT2_PHASE=0., p_CLKOUT2_DIVIDE=p//1,
-                                     p_CLKOUT3_PHASE=0., p_CLKOUT3_DIVIDE=p//1,
-                                     p_CLKOUT4_PHASE=0., p_CLKOUT4_DIVIDE=p//1,  # sys
-                                     p_CLKOUT5_PHASE=270., p_CLKOUT5_DIVIDE=p//1,  # sys_ps
-        )
-        self.specials += Instance("BUFG", i_I=pll[4], o_O=self.cd_sys.clk)
-        self.specials += Instance("BUFG", i_I=pll[5], o_O=self.cd_sys_ps.clk)
-        self.specials += AsyncResetSynchronizer(self.cd_sys, ~pll_lckd)
 
         self.specials += Instance("ODDR2", p_DDR_ALIGNMENT="NONE",
                                   p_INIT=0, p_SRTYPE="SYNC",