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| author | Jiri Kosina <jkosina@suse.cz> | 2008-05-06 18:57:55 +0400 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2008-05-06 18:57:55 +0400 |
| commit | 7022b15e2a9f878fd5184586064c63352c3dd225 (patch) | |
| tree | 5365c2f5bc82ae1946636ee8d5cd5d3b7e804f1b /include/asm-blackfin/mach-bf533/cdefBF532.h | |
| parent | aaad2b0c757f3e6e02552cb0bdcd91a5ec0d6305 (diff) | |
| parent | a15306365a16380f3bafee9e181ba01231d4acd7 (diff) | |
| download | linux-7022b15e2a9f878fd5184586064c63352c3dd225.tar.xz | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'include/asm-blackfin/mach-bf533/cdefBF532.h')
| -rw-r--r-- | include/asm-blackfin/mach-bf533/cdefBF532.h | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/include/asm-blackfin/mach-bf533/cdefBF532.h b/include/asm-blackfin/mach-bf533/cdefBF532.h index c803e14b529c..154655452d4c 100644 --- a/include/asm-blackfin/mach-bf533/cdefBF532.h +++ b/include/asm-blackfin/mach-bf533/cdefBF532.h @@ -43,7 +43,27 @@ /* Clock and System Control (0xFFC0 0400-0xFFC0 07FF) */ #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, iwr; + + if (val == bfin_read_PLL_CTL()) + return; + + local_irq_save(flags); + /* Enable the PLL Wakeup bit in SIC IWR */ + iwr = bfin_read32(SIC_IWR); + /* Only allow PPL Wakeup) */ + bfin_write32(SIC_IWR, IWR_ENABLE(0)); + + bfin_write16(PLL_CTL, val); + SSYNC(); + asm("IDLE;"); + + bfin_write32(SIC_IWR, iwr); + 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) @@ -57,6 +77,10 @@ static __inline__ void bfin_write_VR_CTL(unsigned int val) { unsigned long flags, iwr; + if (val == bfin_read_VR_CTL()) + return; + + local_irq_save(flags); /* Enable the PLL Wakeup bit in SIC IWR */ iwr = bfin_read32(SIC_IWR); /* Only allow PPL Wakeup) */ @@ -64,11 +88,10 @@ static __inline__ void bfin_write_VR_CTL(unsigned int val) bfin_write16(VR_CTL, val); SSYNC(); - - local_irq_save(flags); asm("IDLE;"); - local_irq_restore(flags); + bfin_write32(SIC_IWR, iwr); + local_irq_restore(flags); } /* System Interrupt Controller (0xFFC0 0C00-0xFFC0 0FFF) */ |