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arch: powerpc: update the IFC IP input clock 

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.

Update sys_info->freq_localbus to represent IFC input clock with
value constant divisor of platform clock.

Signed-off-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
This commit is contained in:
Prabhakar Kushwaha 2017-02-02 15:01:26 +05:30 committed by York Sun
parent d98b98d62e
commit 1c40707e3f
3 changed files with 21 additions and 8 deletions
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3
README
View File

@ -504,6 +504,9 @@ 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

16
arch/powerpc/cpu/mpc85xx/Kconfig
View File

@ -1301,6 +1301,22 @@ config SYS_PPC_E500_DEBUG_TLB
symbol should be set to the TLB1 entry to be used for this
purpose. If unsure, do not change.
config SYS_FSL_IFC_CLK_DIV
int "Divider of platform clock"
depends on FSL_IFC
default 2 if ARCH_B4420 || \
ARCH_B4860 || \
ARCH_T1024 || \
ARCH_T1023 || \
ARCH_T1040 || \
ARCH_T1042 || \
ARCH_T4160 || \
ARCH_T4240
default 1
help
Defines divider of platform clock(clock input to
IFC controller).
source "board/freescale/b4860qds/Kconfig"
source "board/freescale/bsc9131rdb/Kconfig"
source "board/freescale/bsc9132qds/Kconfig"

10
arch/powerpc/cpu/mpc85xx/speed.c
View File

@ -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;
@ -640,10 +636,8 @@ 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
}