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powerpc/85xx: Change timebase divisor to be defined per processor

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Introduce new CONFIG_SYS_FSL_TBCLK_DIV on 85xx platforms because
different SoCs have different divisor amounts.  All the PQ3 parts are
/8, the P4080/P4080 is /16, and P2040/P3041/P5020 are /32.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Kumar Gala 2011-02-18 05:40:54 -06:00
parent d90fdba6ca
commit 66412c6371
3 changed files with 19 additions and 5 deletions
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7
README
View file

@ -356,6 +356,13 @@ The following options need to be configured:
Define this option if you want to enable the
ICache only when Code runs from RAM.
- 85xx CPU Options:
CONFIG_SYS_FSL_TBCLK_DIV
Defines the core time base clock divider ratio compared to the
system clock. On most PQ3 devices this is 8, on newer QorIQ
devices it can be 16 or 32. The ratio varies from SoC to Soc.
- Intel Monahans options:
CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO

11
arch/powerpc/cpu/mpc85xx/cpu.c
View file

@ -234,13 +234,14 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
/*
* Get timebase clock frequency
*/
#ifndef CONFIG_SYS_FSL_TBCLK_DIV
#define CONFIG_SYS_FSL_TBCLK_DIV 8
#endif
unsigned long get_tbclk (void)
{
#ifdef CONFIG_FSL_CORENET
return (gd->bus_clk + 8) / 16;
#else
return (gd->bus_clk + 4UL)/8UL;
#endif
unsigned long tbclk_div = CONFIG_SYS_FSL_TBCLK_DIV;
return (gd->bus_clk + (tbclk_div >> 1)) / tbclk_div;
}

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

@ -264,6 +264,7 @@
#define CONFIG_SYS_NUM_FM1_DTSEC 5
#define CONFIG_NUM_DDR_CONTROLLERS 1
#define CONFIG_SYS_FM_MURAM_SIZE 0x28000
#define CONFIG_SYS_FSL_TBCLK_DIV 32
#define CONFIG_SYS_FSL_USB1_PHY_ENABLE
#define CONFIG_SYS_FSL_USB2_PHY_ENABLE
#define CONFIG_SYS_FSL_ERRATUM_ESDHC111
@ -278,6 +279,7 @@
#define CONFIG_SYS_NUM_FM1_10GEC 1
#define CONFIG_NUM_DDR_CONTROLLERS 1
#define CONFIG_SYS_FM_MURAM_SIZE 0x28000
#define CONFIG_SYS_FSL_TBCLK_DIV 32
#define CONFIG_SYS_FSL_USB1_PHY_ENABLE
#define CONFIG_SYS_FSL_USB2_PHY_ENABLE
#define CONFIG_SYS_FSL_ERRATUM_ESDHC111
@ -288,6 +290,7 @@
#define CONFIG_SYS_FSL_NUM_LAWS 32
#define CONFIG_SYS_FSL_SEC_COMPAT 4
#define CONFIG_SYS_FM_MURAM_SIZE 0x28000
#define CONFIG_SYS_FSL_TBCLK_DIV 16
#elif defined(CONFIG_PPC_P4080)
#define CONFIG_MAX_CPUS 8
@ -301,6 +304,7 @@
#define CONFIG_SYS_NUM_FM2_10GEC 1
#define CONFIG_NUM_DDR_CONTROLLERS 2
#define CONFIG_SYS_FM_MURAM_SIZE 0x28000
#define CONFIG_SYS_FSL_TBCLK_DIV 16
#define CONFIG_SYS_FSL_ERRATUM_CPC_A002
#define CONFIG_SYS_FSL_ERRATUM_CPC_A003
#define CONFIG_SYS_FSL_ERRATUM_DDR_A003
@ -325,6 +329,7 @@
#define CONFIG_SYS_NUM_FM1_10GEC 1
#define CONFIG_NUM_DDR_CONTROLLERS 1
#define CONFIG_SYS_FM_MURAM_SIZE 0x28000
#define CONFIG_SYS_FSL_TBCLK_DIV 32
#define CONFIG_SYS_FSL_USB1_PHY_ENABLE
#define CONFIG_SYS_FSL_USB2_PHY_ENABLE
#define CONFIG_SYS_FSL_ERRATUM_ESDHC111
@ -339,6 +344,7 @@
#define CONFIG_SYS_NUM_FM1_10GEC 1
#define CONFIG_NUM_DDR_CONTROLLERS 2
#define CONFIG_SYS_FM_MURAM_SIZE 0x28000
#define CONFIG_SYS_FSL_TBCLK_DIV 32
#define CONFIG_SYS_FSL_USB1_PHY_ENABLE
#define CONFIG_SYS_FSL_USB2_PHY_ENABLE
#define CONFIG_SYS_FSL_ERRATUM_ESDHC111