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powerpc/85xx: Fixup determining PME, FMan freq

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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>
This commit is contained in:
Kumar Gala 2011-02-16 02:03:29 -06:00
parent 863a3eac23
commit b5c8753fa1
2 changed files with 35 additions and 9 deletions
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38
arch/powerpc/cpu/mpc85xx/speed.c
View file

@ -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

6
arch/powerpc/include/asm/config_mpc85xx.h
View file

@ -243,6 +243,7 @@
#elif defined(CONFIG_PPC_P2040)
#define CONFIG_MAX_CPUS 4
#define CONFIG_SYS_FSL_NUM_CC_PLLS 2
#define CONFIG_SYS_FSL_NUM_LAWS 32
#define CONFIG_SYS_FSL_SEC_COMPAT 4
#define CONFIG_SYS_NUM_FMAN 1
@ -252,6 +253,7 @@
#elif defined(CONFIG_PPC_P3041)
#define CONFIG_MAX_CPUS 4
#define CONFIG_SYS_FSL_NUM_CC_PLLS 2
#define CONFIG_SYS_FSL_NUM_LAWS 32
#define CONFIG_SYS_FSL_SEC_COMPAT 4
#define CONFIG_SYS_NUM_FMAN 1
@ -262,12 +264,14 @@
#elif defined(CONFIG_PPC_P4040)
#define CONFIG_MAX_CPUS 4
#define CONFIG_SYS_FSL_NUM_CC_PLLS 4
#define CONFIG_SYS_FSL_NUM_LAWS 32
#define CONFIG_SYS_FSL_SEC_COMPAT 4
#define CONFIG_SYS_FM_MURAM_SIZE 0x28000
#elif defined(CONFIG_PPC_P4080)
#define CONFIG_MAX_CPUS 8
#define CONFIG_SYS_FSL_NUM_CC_PLLS 4
#define CONFIG_SYS_FSL_NUM_LAWS 32
#define CONFIG_SYS_FSL_SEC_COMPAT 4
#define CONFIG_SYS_NUM_FMAN 2
@ -290,6 +294,7 @@
/* P5010 is single core version of P5020 */
#elif defined(CONFIG_PPC_P5010)
#define CONFIG_MAX_CPUS 1
#define CONFIG_SYS_FSL_NUM_CC_PLLS 2
#define CONFIG_SYS_FSL_NUM_LAWS 32
#define CONFIG_SYS_FSL_SEC_COMPAT 4
#define CONFIG_SYS_NUM_FMAN 1
@ -300,6 +305,7 @@
#elif defined(CONFIG_PPC_P5020)
#define CONFIG_MAX_CPUS 2
#define CONFIG_SYS_FSL_NUM_CC_PLLS 2
#define CONFIG_SYS_FSL_NUM_LAWS 32
#define CONFIG_SYS_FSL_SEC_COMPAT 4
#define CONFIG_SYS_NUM_FMAN 1