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>

2 files changed, 35 insertions, 9 deletions

diff --git a/arch/powerpc/cpu/mpc85xx/speed.c b/arch/powerpc/cpu/mpc85xx/speed.c
index faca451..f26de6c 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
 
diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h
index 0529632..4228161 100644
--- a/arch/powerpc/include/asm/config_mpc85xx.h
+++ b/arch/powerpc/include/asm/config_mpc85xx.h
@@ -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