[U-Boot] [PATCH 1/2][v2] arch: powerpc: update the IFC IP input clock

[Prabhakar Kushwaha]

IFC IP clock is always a constant divisor of platform clock
pre-defined per SoC. Clock control register (CCR) used in
current implementation governs IFC IP output clock.

So update IFC IP clock to be defined as per predefined clock
divisor of platform clock.

Signed-off-by: Prabhakar Kushwaha <prabhakar.kushwaha at nxp.com>
---
Changes for v2: Split the patch in 2 patch set

 README                                    |  3 +++
 arch/powerpc/cpu/mpc85xx/speed.c          | 10 ++--------
 arch/powerpc/include/asm/config_mpc85xx.h |  9 +++++++++
 3 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/README b/README
index 30d7ee3..873a24c 100644
--- a/README
+++ b/README
@@ -533,6 +533,9 @@ The following options need to be configured:
 		CONFIG_SYS_FSL_IFC_LE
 		Defines the IFC controller register space as Little Endian
 
+		CONFIG_SYS_FSL_IFC_CLK_DIV
+		Defines divider of platform clock(clock input to IFC controller).
+
 		CONFIG_SYS_FSL_PBL_PBI
 		It enables addition of RCW (Power on reset configuration) in built image.
 		Please refer doc/README.pblimage for more details
diff --git a/arch/powerpc/cpu/mpc85xx/speed.c b/arch/powerpc/cpu/mpc85xx/speed.c
index e732969..ea92ff3 100644
--- a/arch/powerpc/cpu/mpc85xx/speed.c
+++ b/arch/powerpc/cpu/mpc85xx/speed.c
@@ -27,10 +27,6 @@ DECLARE_GLOBAL_DATA_PTR;
 void get_sys_info(sys_info_t *sys_info)
 {
 	volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
-#ifdef CONFIG_FSL_IFC
-	struct fsl_ifc ifc_regs = {(void *)CONFIG_SYS_IFC_ADDR, (void *)NULL};
-	u32 ccr;
-#endif
 #ifdef CONFIG_FSL_CORENET
 	volatile ccsr_clk_t *clk = (void *)(CONFIG_SYS_FSL_CORENET_CLK_ADDR);
 	unsigned int cpu;
@@ -641,10 +637,8 @@ void get_sys_info(sys_info_t *sys_info)
 #endif
 
 #if defined(CONFIG_FSL_IFC)
-	ccr = ifc_in32(&ifc_regs.gregs->ifc_ccr);
-	ccr = ((ccr & IFC_CCR_CLK_DIV_MASK) >> IFC_CCR_CLK_DIV_SHIFT) + 1;
-
-	sys_info->freq_localbus = sys_info->freq_systembus / ccr;
+	sys_info->freq_localbus = sys_info->freq_systembus /
+						CONFIG_SYS_FSL_IFC_CLK_DIV;
 #endif
 }
 
diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h
index 505d355..fcfbb01 100644
--- a/arch/powerpc/include/asm/config_mpc85xx.h
+++ b/arch/powerpc/include/asm/config_mpc85xx.h
@@ -151,6 +151,7 @@
 #define CONFIG_NUM_DDR_CONTROLLERS	1
 #define CONFIG_USB_MAX_CONTROLLER_COUNT	1
 #define CONFIG_SYS_FSL_IFC_BANK_COUNT	4
+#define CONFIG_SYS_FSL_IFC_CLK_DIV	1
 #define CONFIG_SYS_CCSRBAR_DEFAULT	0xff700000
 #define CONFIG_SYS_FSL_PCIE_COMPAT	"fsl,qoriq-pcie-v2.2"
 #define CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
@@ -590,6 +591,7 @@
 #define CONFIG_SYS_FSL_DSP_M2_RAM_ADDR	0xb0000000
 #define CONFIG_SYS_FSL_DSP_CCSRBAR_DEFAULT	0xff600000
 #define CONFIG_SYS_FSL_IFC_BANK_COUNT	3
+#define CONFIG_SYS_FSL_IFC_CLK_DIV	1
 #define CONFIG_SYS_CCSRBAR_DEFAULT	0xff700000
 #define CONFIG_NAND_FSL_IFC
 #define CONFIG_SYS_FSL_ERRATUM_ESDHC111
@@ -612,6 +614,7 @@
 #define CONFIG_SYS_FSL_DSP_M3_RAM_ADDR	0xc0000000
 #define CONFIG_SYS_FSL_DSP_CCSRBAR_DEFAULT	0xff600000
 #define CONFIG_SYS_FSL_IFC_BANK_COUNT	3
+#define CONFIG_SYS_FSL_IFC_CLK_DIV	1
 #define CONFIG_SYS_CCSRBAR_DEFAULT	0xff700000
 #define CONFIG_NAND_FSL_IFC
 #define CONFIG_SYS_FSL_ERRATUM_ESDHC111
@@ -666,6 +669,7 @@
 #define CONFIG_SYS_PME_CLK		0
 #define CONFIG_SYS_FSL_DDR_VER		FSL_DDR_VER_4_7
 #define CONFIG_SYS_FSL_IFC_BANK_COUNT	8
+#define CONFIG_SYS_FSL_IFC_CLK_DIV	2
 #define CONFIG_SYS_FMAN_V3
 #define CONFIG_SYS_FM1_CLK		3
 #define CONFIG_SYS_FM2_CLK		3
@@ -714,6 +718,7 @@
 #define CONFIG_SYS_ETVPE_CLK		1
 #define CONFIG_SYS_FSL_DDR_VER		FSL_DDR_VER_4_7
 #define CONFIG_SYS_FSL_IFC_BANK_COUNT	4
+#define CONFIG_SYS_FSL_IFC_CLK_DIV	2
 #define CONFIG_SYS_FMAN_V3
 #define CONFIG_SYS_FM_MURAM_SIZE	0x60000
 #define CONFIG_SYS_FSL_TBCLK_DIV	16
@@ -786,6 +791,7 @@ defined(CONFIG_PPC_T1020) || defined(CONFIG_PPC_T1022)
 #define CONFIG_SYS_PME_CLK		CONFIG_PME_PLAT_CLK_DIV
 #define CONFIG_SYS_FSL_DDR_VER		FSL_DDR_VER_5_0
 #define CONFIG_SYS_FSL_IFC_BANK_COUNT	8
+#define CONFIG_SYS_FSL_IFC_CLK_DIV	2
 #define CONFIG_SYS_FSL_ERRATUM_A008044
 #define CONFIG_SYS_FMAN_V3
 #define CONFIG_FM_PLAT_CLK_DIV	1
@@ -839,6 +845,7 @@ defined(CONFIG_PPC_T1014) || defined(CONFIG_PPC_T1013)
 #define CONFIG_USB_MAX_CONTROLLER_COUNT	2
 #define CONFIG_SYS_FSL_DDR_VER	 FSL_DDR_VER_5_0
 #define CONFIG_SYS_FSL_IFC_BANK_COUNT	8
+#define CONFIG_SYS_FSL_IFC_CLK_DIV	2
 #define CONFIG_SYS_FM1_CLK		0
 #define CONFIG_SYS_SDHC_CLK		0/* Select SDHC CLK begining from PLL1
 					    per rcw field value */
@@ -896,6 +903,7 @@ defined(CONFIG_PPC_T1014) || defined(CONFIG_PPC_T1013)
 #define CONFIG_SYS_SDHC_CLK_2_PLL	/* Select SDHC CLK from 2 PLLs */
 #define CONFIG_SYS_FSL_DDR_VER		FSL_DDR_VER_4_7
 #define CONFIG_SYS_FSL_IFC_BANK_COUNT	8
+#define CONFIG_SYS_FSL_IFC_CLK_DIV	1
 #define CONFIG_SYS_FMAN_V3
 #define CONFIG_SYS_FM_MURAM_SIZE	0x28000
 #define CONFIG_SYS_FSL_TBCLK_DIV	16
@@ -926,6 +934,7 @@ defined(CONFIG_PPC_T1014) || defined(CONFIG_PPC_T1013)
 #define CONFIG_NUM_DDR_CONTROLLERS	1
 #define CONFIG_SYS_FSL_DDR_VER		FSL_DDR_VER_4_6
 #define CONFIG_SYS_FSL_IFC_BANK_COUNT	8
+#define CONFIG_SYS_FSL_IFC_CLK_DIV	1
 #define CONFIG_SYS_CCSRBAR_DEFAULT	0xff700000
 #define CONFIG_SYS_FSL_ERRATUM_A005125
 #define CONFIG_SYS_FSL_MAX_NUM_OF_SEC	3
-- 
1.9.1