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-rw-r--r--README5
-rw-r--r--arch/powerpc/cpu/mpc85xx/speed.c25
-rw-r--r--arch/powerpc/include/asm/config_mpc85xx.h1
-rw-r--r--arch/powerpc/include/asm/immap_85xx.h3
4 files changed, 32 insertions, 2 deletions
diff --git a/README b/README
index e58e9c0..a0646c3 100644
--- a/README
+++ b/README
@@ -423,6 +423,11 @@ The following options need to be configured:
CONFIG_SYS_FSL_DSP_CCSRBAR_DEFAULT
This value denotes start offset of DSP CCSR space.
+ CONFIG_SYS_FSL_SINGLE_SOURCE_CLK
+ Single Source Clock is clocking mode present in some of FSL SoC's.
+ In this mode, a single differential clock is used to supply
+ clocks to the sysclock, ddrclock and usbclock.
+
- Generic CPU options:
CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN
diff --git a/arch/powerpc/cpu/mpc85xx/speed.c b/arch/powerpc/cpu/mpc85xx/speed.c
index 7c7467f..35867df 100644
--- a/arch/powerpc/cpu/mpc85xx/speed.c
+++ b/arch/powerpc/cpu/mpc85xx/speed.c
@@ -74,12 +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
+ /*
+ * 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]) >>
+ FSL_CORENET2_RCWSR5_DDR_REFCLK_SEL_SHIFT) &
+ FSL_CORENET2_RCWSR5_DDR_REFCLK_SEL_MASK;
+ /*
+ * For single source clocking, both ddrclock and syclock
+ * are driven by differential sysclock.
+ */
+ if (single_src == FSL_CORENET2_RCWSR5_DDR_REFCLK_SINGLE_CLK) {
+ printf("Single Source Clock Configuration\n");
+ sys_info->freq_ddrbus = CONFIG_SYS_CLK_FREQ;
+ } else
+#endif
#ifdef CONFIG_DDR_CLK_FREQ
- sys_info->freq_ddrbus = CONFIG_DDR_CLK_FREQ;
+ sys_info->freq_ddrbus = CONFIG_DDR_CLK_FREQ;
#else
- sys_info->freq_ddrbus = sysclk;
+ sys_info->freq_ddrbus = sysclk;
#endif
sys_info->freq_systembus *= (in_be32(&gur->rcwsr[0]) >> 25) & 0x1f;
diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h
index 244ccbf..3d8bd9a 100644
--- a/arch/powerpc/include/asm/config_mpc85xx.h
+++ b/arch/powerpc/include/asm/config_mpc85xx.h
@@ -711,6 +711,7 @@ defined(CONFIG_PPC_T1020) || defined(CONFIG_PPC_T1022)
#define CONFIG_FM_PLAT_CLK_DIV 1
#define CONFIG_SYS_FM1_CLK CONFIG_FM_PLAT_CLK_DIV
#define CONFIG_SYS_FM_MURAM_SIZE 0x30000
+#define CONFIG_SYS_FSL_SINGLE_SOURCE_CLK
#define CONFIG_SYS_FSL_TBCLK_DIV 16
#define CONFIG_SYS_FSL_PCIE_COMPAT "fsl,qoriq-pcie-v2.4"
#define CONFIG_SYS_FSL_USB1_PHY_ENABLE
diff --git a/arch/powerpc/include/asm/immap_85xx.h b/arch/powerpc/include/asm/immap_85xx.h
index 672e8c6..68c3c82 100644
--- a/arch/powerpc/include/asm/immap_85xx.h
+++ b/arch/powerpc/include/asm/immap_85xx.h
@@ -1774,6 +1774,9 @@ defined(CONFIG_PPC_T1020) || defined(CONFIG_PPC_T1022)
#define FSL_CORENET2_RCWSR5_SRDS_PLL_PD_S3_PLL2 0x00040000
#define FSL_CORENET2_RCWSR5_SRDS_PLL_PD_S4_PLL1 0x00020000
#define FSL_CORENET2_RCWSR5_SRDS_PLL_PD_S4_PLL2 0x00010000
+#define FSL_CORENET2_RCWSR5_DDR_REFCLK_SEL_SHIFT 4
+#define FSL_CORENET2_RCWSR5_DDR_REFCLK_SEL_MASK 0x00000011
+#define FSL_CORENET2_RCWSR5_DDR_REFCLK_SINGLE_CLK 1
#else /* CONFIG_SYS_FSL_QORIQ_CHASSIS2 */
#define FSL_CORENET_RCWSR0_MEM_PLL_RAT_SHIFT 17