powerpc/85xx: Enhance get_sys_info() to check clocking mode
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>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/arch/powerpc/cpu/mpc85xx/speed.c b/arch/powerpc/cpu/mpc85xx/speed.c
index 35dfb0a..2d6c668 100644
--- a/arch/powerpc/cpu/mpc85xx/speed.c
+++ b/arch/powerpc/cpu/mpc85xx/speed.c
@@ -74,28 +74,33 @@
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;