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| author | Maurus Cuelenaere <mcuelenaere@gmail.com> | 2009-07-03 21:34:40 +0000 |
|---|---|---|
| committer | Maurus Cuelenaere <mcuelenaere@gmail.com> | 2009-07-03 21:34:40 +0000 |
| commit | eabeb928ddfdbe5fc6379efb87d9522803310649 (patch) | |
| tree | ee1945d0776a16cc93a72a814c9edecf6c558403 /firmware/target/mips/ingenic_jz47xx/system-jz4740.c | |
| parent | 9ecaa5562d2b00fa69ad9d0bd168bf2c154ada0c (diff) | |
| download | rockbox-eabeb928ddfdbe5fc6379efb87d9522803310649.tar.gz rockbox-eabeb928ddfdbe5fc6379efb87d9522803310649.tar.bz2 rockbox-eabeb928ddfdbe5fc6379efb87d9522803310649.zip | |
Ingenic Jz4740: add basic frequency switching
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21625 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/mips/ingenic_jz47xx/system-jz4740.c')
| -rw-r--r-- | firmware/target/mips/ingenic_jz47xx/system-jz4740.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/firmware/target/mips/ingenic_jz47xx/system-jz4740.c b/firmware/target/mips/ingenic_jz47xx/system-jz4740.c index c0a9bf19aa..978675825c 100644 --- a/firmware/target/mips/ingenic_jz47xx/system-jz4740.c +++ b/firmware/target/mips/ingenic_jz47xx/system-jz4740.c @@ -541,10 +541,11 @@ void system_reboot(void) void system_exception_wait(void) { /* check for power button without including any .h file */ - while (1) + while(1) { - if( ~REG_GPIO_PXPIN(3) & (1 << 29) ) - break; + if( (~REG_GPIO_PXPIN(3)) & (1 << 29) ) + return; + asm volatile("nop"); } } @@ -574,3 +575,19 @@ int system_memory_guard(int newmode) (void)newmode; return 0; } + +#ifdef HAVE_ADJUSTABLE_CPU_FREQ +void set_cpu_frequency(long frequency) +{ + unsigned long cfcr = REG_CPM_CPCCR; + cfcr &= ~CPM_CPCCR_CDIV_MASK; + + if(frequency == CPUFREQ_NORMAL) + cfcr |= (0 << CPM_CPCCR_CDIV_BIT); + else + cfcr |= (2 << CPM_CPCCR_CDIV_BIT); + + REG_CPM_CPCCR = cfcr; + cpu_frequency = frequency; +} +#endif |