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Diffstat (limited to 'include/asm-blackfin/mach-bf527/cdefBF52x_base.h')
-rw-r--r--include/asm-blackfin/mach-bf527/cdefBF52x_base.h57
1 files changed, 55 insertions, 2 deletions
diff --git a/include/asm-blackfin/mach-bf527/cdefBF52x_base.h b/include/asm-blackfin/mach-bf527/cdefBF52x_base.h
index 50e14e7da3ee..9dbdbec8ea1b 100644
--- a/include/asm-blackfin/mach-bf527/cdefBF52x_base.h
+++ b/include/asm-blackfin/mach-bf527/cdefBF52x_base.h
@@ -29,18 +29,71 @@
*/
#ifndef _CDEF_BF52X_H
+#define _CDEF_BF52X_H
+
+#include <asm/system.h>
+#include <asm/blackfin.h>
#include "defBF52x_base.h"
+/* Include core specific register pointer definitions */
+#include <asm/mach-common/cdef_LPBlackfin.h>
+
/* ==== begin from cdefBF534.h ==== */
/* Clock and System Control (0xFFC00000 - 0xFFC000FF) */
#define bfin_read_PLL_CTL() bfin_read16(PLL_CTL)
-#define bfin_write_PLL_CTL(val) bfin_write16(PLL_CTL, val)
+/* 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(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(flags);
+}
#define bfin_read_PLL_DIV() bfin_read16(PLL_DIV)
#define bfin_write_PLL_DIV(val) bfin_write16(PLL_DIV, val)
#define bfin_read_VR_CTL() bfin_read16(VR_CTL)
-#define bfin_write_VR_CTL(val) bfin_write16(VR_CTL, val)
+/* 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(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(flags);
+}
#define bfin_read_PLL_STAT() bfin_read16(PLL_STAT)
#define bfin_write_PLL_STAT(val) bfin_write16(PLL_STAT, val)
#define bfin_read_PLL_LOCKCNT() bfin_read16(PLL_LOCKCNT)