diff options
| author | Kumar Gala <galak@kernel.crashing.org> | 2011-02-16 02:03:29 -0600 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2011-04-04 09:24:43 -0500 |
| commit | b5c8753fa173d6372d86dcd11f83ef23c911b0de (patch) | |
| tree | 1b35489b34b36c3425cc53052109e68dd05ec20b /arch/powerpc/cpu/mpc85xx | |
| parent | 863a3eac23362e70f12a456e6b563c416cbc43fc (diff) | |
powerpc/85xx: Fixup determining PME, FMan freq
On CoreNet based SoCs (P2040, P3041, P4080, P5020) we have some
additional rules to determining the various frequencies that PME & FMan
IP blocks run at.
We need to take into account:
* Reduced number of Core Complex PLL clusters
* HWA_ASYNC_DIV (allows for /2 or /4 options)
On P2040/P3041/P5020 we only have 2 Core Complex PLLs and in such SoCs
the PME & FMan blocks utilize the second Core Complex PLL. On SoCs
like p4080 with 4 Core Complex PLLs we utilize the third Core Complex
PLL for PME & FMan blocks.
On P2040/P3041/P5020 we have the added feature that we can divide the
PLL down further by either /2 or /4 based on HWA_ASYNC_DIV. On P4080
this options doesn't exist, however HWA_ASYNC_DIV field in RCW should be
set to 0 and this gets a backward compatiable /2 behavior.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/cpu/mpc85xx')
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/speed.c | 38 |
1 files changed, 29 insertions, 9 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/speed.c b/arch/powerpc/cpu/mpc85xx/speed.c index faca451cc1..f26de6cd3e 100644 --- a/arch/powerpc/cpu/mpc85xx/speed.c +++ b/arch/powerpc/cpu/mpc85xx/speed.c @@ -107,25 +107,45 @@ void get_sys_info (sys_info_t * sysInfo) #define PME_CLK_SEL 0x80000000 #define FM1_CLK_SEL 0x40000000 #define FM2_CLK_SEL 0x20000000 +#define HWA_ASYNC_DIV 0x04000000 +#if (CONFIG_SYS_FSL_NUM_CC_PLLS == 2) +#define HWA_CC_PLL 1 +#elif (CONFIG_SYS_FSL_NUM_CC_PLLS == 4) +#define HWA_CC_PLL 2 +#else +#error CONFIG_SYS_FSL_NUM_CC_PLLS not set or unknown case +#endif rcw_tmp = in_be32(&gur->rcwsr[7]); #ifdef CONFIG_SYS_DPAA_PME - if (rcw_tmp & PME_CLK_SEL) - sysInfo->freqPME = freqCC_PLL[2] / 2; - else + if (rcw_tmp & PME_CLK_SEL) { + if (rcw_tmp & HWA_ASYNC_DIV) + sysInfo->freqPME = freqCC_PLL[HWA_CC_PLL] / 4; + else + sysInfo->freqPME = freqCC_PLL[HWA_CC_PLL] / 2; + } else { sysInfo->freqPME = sysInfo->freqSystemBus / 2; + } #endif #ifdef CONFIG_SYS_DPAA_FMAN - if (rcw_tmp & FM1_CLK_SEL) - sysInfo->freqFMan[0] = freqCC_PLL[2] / 2; - else + if (rcw_tmp & FM1_CLK_SEL) { + if (rcw_tmp & HWA_ASYNC_DIV) + sysInfo->freqFMan[0] = freqCC_PLL[HWA_CC_PLL] / 4; + else + sysInfo->freqFMan[0] = freqCC_PLL[HWA_CC_PLL] / 2; + } else { sysInfo->freqFMan[0] = sysInfo->freqSystemBus / 2; + } #if (CONFIG_SYS_NUM_FMAN) == 2 - if (rcw_tmp & FM2_CLK_SEL) - sysInfo->freqFMan[1] = freqCC_PLL[2] / 2; - else + if (rcw_tmp & FM2_CLK_SEL) { + if (rcw_tmp & HWA_ASYNC_DIV) + sysInfo->freqFMan[1] = freqCC_PLL[HWA_CC_PLL] / 4; + else + sysInfo->freqFMan[1] = freqCC_PLL[HWA_CC_PLL] / 2; + } else { sysInfo->freqFMan[1] = sysInfo->freqSystemBus / 2; + } #endif #endif |