Blackfin: Split PLL code from mach-specific cdef headers

[sfrench/cifs-2.6.git] / arch / blackfin / mach-bf538 / include / mach / pll.h

diff --git a/arch/blackfin/mach-bf538/include/mach/pll.h b/arch/blackfin/mach-bf538/include/mach/pll.h
new file mode 100644 (file)
index 0000000..0e67452
--- /dev/null
+++ b/arch/blackfin/mach-bf538/include/mach/pll.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2008-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef _MACH_PLL_H
+#define _MACH_PLL_H
+
+#include <asm/blackfin.h>
+#include <asm/irqflags.h>
+
+/* Writing to PLL_CTL initiates a PLL relock sequence. */
+static __inline__ void bfin_write_PLL_CTL(unsigned int val)
+{
+       unsigned long flags, iwr0, iwr1;
+
+       if (val == bfin_read_PLL_CTL())
+               return;
+
+       local_irq_save_hw(flags);
+       /* Enable the PLL Wakeup bit in SIC IWR */
+       iwr0 = bfin_read32(SIC_IWR0);
+       iwr1 = bfin_read32(SIC_IWR1);
+       /* Only allow PPL Wakeup) */
+       bfin_write32(SIC_IWR0, IWR_ENABLE(0));
+       bfin_write32(SIC_IWR1, 0);
+
+       bfin_write16(PLL_CTL, val);
+       SSYNC();
+       asm("IDLE;");
+
+       bfin_write32(SIC_IWR0, iwr0);
+       bfin_write32(SIC_IWR1, iwr1);
+       local_irq_restore_hw(flags);
+}
+
+/* Writing to VR_CTL initiates a PLL relock sequence. */
+static __inline__ void bfin_write_VR_CTL(unsigned int val)
+{
+       unsigned long flags, iwr0, iwr1;
+
+       if (val == bfin_read_VR_CTL())
+               return;
+
+       local_irq_save_hw(flags);
+       /* Enable the PLL Wakeup bit in SIC IWR */
+       iwr0 = bfin_read32(SIC_IWR0);
+       iwr1 = bfin_read32(SIC_IWR1);
+       /* Only allow PPL Wakeup) */
+       bfin_write32(SIC_IWR0, IWR_ENABLE(0));
+       bfin_write32(SIC_IWR1, 0);
+
+       bfin_write16(VR_CTL, val);
+       SSYNC();
+       asm("IDLE;");
+
+       bfin_write32(SIC_IWR0, iwr0);
+       bfin_write32(SIC_IWR1, iwr1);
+       local_irq_restore_hw(flags);
+}
+
+#endif /* _MACH_PLL_H */