T1040 and it's variants provide "Single Oscillator Source" Reference Clock Mode.
In this mode, single onboard oscillator(DIFF_SYSCLK) can provide the reference clock (100MHz) to the following PLLs: • Platform PLL • Core PLLs • USB PLL • DDR PLL, etc
The cfg_eng_use0 of porsr1 register identifies whether the SYSCLK (single-ended) or DIFF_SYSCLK (differential) is selected as the clock input to the chip.
get_sys_info has been enhanced to add the diff_sysclk so that the various drivers can be made aware of ths diff sysclk configuration and act accordingly.
Other changes: -single_src to ddr_refclk_sel, as it is use for checking ddr reference clock -Removed the print of single_src from get_sys_info as this will be -printed whenever somebody calls get_sys_info which is not appropriate. -Add print of single_src in checkcpu as it is called only once during initialization
Signed-off-by: Poonam Aggrwal poonam.aggrwal@freescale.com Signed-off-by: Priyanka Jain Priyanka.Jain@freescale.com Signed-off-by: Vijay Rai vijay.rai@freescale.com --- arch/powerpc/cpu/mpc85xx/cpu.c | 5 +++++ arch/powerpc/cpu/mpc85xx/speed.c | 21 +++++++++++++-------- arch/powerpc/include/asm/immap_85xx.h | 6 ++++++ include/e500.h | 3 +++ 4 files changed, 27 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/cpu/mpc85xx/cpu.c b/arch/powerpc/cpu/mpc85xx/cpu.c index cb7efc9..0697123 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu.c +++ b/arch/powerpc/cpu/mpc85xx/cpu.c @@ -129,6 +129,11 @@ int checkcpu (void)
get_sys_info(&sysinfo);
+#ifdef CONFIG_SYS_FSL_SINGLE_SOURCE_CLK + if (sysinfo.diff_sysclk == 1) + puts("Single Source Clock Configuration\n"); +#endif + puts("Clock Configuration:"); for_each_cpu(i, core, nr_cores, mask) { if (!(i & 3)) diff --git a/arch/powerpc/cpu/mpc85xx/speed.c b/arch/powerpc/cpu/mpc85xx/speed.c index 74e3c1b..d516d4e 100644 --- a/arch/powerpc/cpu/mpc85xx/speed.c +++ b/arch/powerpc/cpu/mpc85xx/speed.c @@ -74,28 +74,33 @@ void get_sys_info(sys_info_t *sys_info) uint ratio[CONFIG_SYS_FSL_NUM_CC_PLLS]; unsigned long sysclk = CONFIG_SYS_CLK_FREQ; uint mem_pll_rat; -#ifdef CONFIG_SYS_FSL_SINGLE_SOURCE_CLK - uint single_src; -#endif
sys_info->freq_systembus = sysclk; #ifdef CONFIG_SYS_FSL_SINGLE_SOURCE_CLK + uint ddr_refclk_sel; + unsigned int porsr1_sys_clk; + porsr1_sys_clk = in_be32(&gur->porsr1) >> FSL_DCFG_PORSR1_SYSCLK_SHIFT + & FSL_DCFG_PORSR1_SYSCLK_MASK; + if (porsr1_sys_clk == FSL_DCFG_PORSR1_SYSCLK_DIFF) + sys_info->diff_sysclk = 1; + else + sys_info->diff_sysclk = 0; + /* * DDR_REFCLK_SEL rcw bit is used to determine if DDR PLLS * are driven by separate DDR Refclock or single source * differential clock. */ - single_src = (in_be32(&gur->rcwsr[5]) >> + ddr_refclk_sel = (in_be32(&gur->rcwsr[5]) >> FSL_CORENET2_RCWSR5_DDR_REFCLK_SEL_SHIFT) & FSL_CORENET2_RCWSR5_DDR_REFCLK_SEL_MASK; /* - * For single source clocking, both ddrclock and syclock + * For single source clocking, both ddrclock and sysclock * are driven by differential sysclock. */ - if (single_src == FSL_CORENET2_RCWSR5_DDR_REFCLK_SINGLE_CLK) { - printf("Single Source Clock Configuration\n"); + if (ddr_refclk_sel == FSL_CORENET2_RCWSR5_DDR_REFCLK_SINGLE_CLK) sys_info->freq_ddrbus = CONFIG_SYS_CLK_FREQ; - } else + else #endif #ifdef CONFIG_DDR_CLK_FREQ sys_info->freq_ddrbus = CONFIG_DDR_CLK_FREQ; diff --git a/arch/powerpc/include/asm/immap_85xx.h b/arch/powerpc/include/asm/immap_85xx.h index a178187..3ca142d 100644 --- a/arch/powerpc/include/asm/immap_85xx.h +++ b/arch/powerpc/include/asm/immap_85xx.h @@ -1583,6 +1583,12 @@ typedef struct cpc_corenet { typedef struct ccsr_gur { u32 porsr1; /* POR status 1 */ u32 porsr2; /* POR status 2 */ +#ifdef CONFIG_SYS_FSL_SINGLE_SOURCE_CLK +#define FSL_DCFG_PORSR1_SYSCLK_SHIFT 15 +#define FSL_DCFG_PORSR1_SYSCLK_MASK 0x1 +#define FSL_DCFG_PORSR1_SYSCLK_SINGLE_ENDED 0x1 +#define FSL_DCFG_PORSR1_SYSCLK_DIFF 0x0 +#endif u8 res_008[0x20-0x8]; u32 gpporcr1; /* General-purpose POR configuration */ u32 gpporcr2; /* General-purpose POR configuration 2 */ diff --git a/include/e500.h b/include/e500.h index 0c24326..5884a22 100644 --- a/include/e500.h +++ b/include/e500.h @@ -24,6 +24,9 @@ typedef struct #ifdef CONFIG_SYS_DPAA_PME unsigned long freq_pme; #endif +#ifdef CONFIG_SYS_FSL_SINGLE_SOURCE_CLK + unsigned char diff_sysclk; +#endif } MPC85xx_SYS_INFO;
#endif /* _ASMLANGUAGE */