Fix the incorrect DDR clk freq reporting on 8536DS
On 8536DS board, When the DDR clk is set async mode(SW3[6:8] != 111),
The display is still sync mode DDR freq. This patch try to fix
this. The display DDR freq is now the actual freq in both
sync and async mode.
Signed-off-by: Jason Jin <Jason.jin@freescale.com>
diff --git a/cpu/mpc85xx/cpu.c b/cpu/mpc85xx/cpu.c
index 67e81c0..f15b0a8 100644
--- a/cpu/mpc85xx/cpu.c
+++ b/cpu/mpc85xx/cpu.c
@@ -85,7 +85,8 @@
struct cpu_type *cpu;
#ifdef CONFIG_DDR_CLK_FREQ
volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR);
- u32 ddr_ratio = ((gur->porpllsr) & 0x00003e00) >> 9;
+ u32 ddr_ratio = ((gur->porpllsr) & MPC85xx_PORPLLSR_DDR_RATIO)
+ >> MPC85xx_PORPLLSR_DDR_RATIO_SHIFT;
#else
u32 ddr_ratio = 0;
#endif
diff --git a/cpu/mpc85xx/speed.c b/cpu/mpc85xx/speed.c
index 1cda1e3..485ba20 100644
--- a/cpu/mpc85xx/speed.c
+++ b/cpu/mpc85xx/speed.c
@@ -54,7 +54,8 @@
#ifdef CONFIG_DDR_CLK_FREQ
{
- u32 ddr_ratio = ((gur->porpllsr) & 0x00003e00) >> 9;
+ u32 ddr_ratio = ((gur->porpllsr) & MPC85xx_PORPLLSR_DDR_RATIO)
+ >> MPC85xx_PORPLLSR_DDR_RATIO_SHIFT;
if (ddr_ratio != 0x7)
sysInfo->freqDDRBus = ddr_ratio * CONFIG_DDR_CLK_FREQ;
}
diff --git a/include/asm-ppc/immap_85xx.h b/include/asm-ppc/immap_85xx.h
index 559d6ea..50c9dde 100644
--- a/include/asm-ppc/immap_85xx.h
+++ b/include/asm-ppc/immap_85xx.h
@@ -1552,6 +1552,13 @@
*/
typedef struct ccsr_gur {
uint porpllsr; /* 0xe0000 - POR PLL ratio status register */
+#ifdef CONFIG_MPC8536
+#define MPC85xx_PORPLLSR_DDR_RATIO 0x3e000000
+#define MPC85xx_PORPLLSR_DDR_RATIO_SHIFT 25
+#else
+#define MPC85xx_PORPLLSR_DDR_RATIO 0x00003e00
+#define MPC85xx_PORPLLSR_DDR_RATIO_SHIFT 9
+#endif
uint porbmsr; /* 0xe0004 - POR boot mode status register */
#define MPC85xx_PORBMSR_HA 0x00070000
uint porimpscr; /* 0xe0008 - POR I/O impedance status and control register */
diff --git a/include/configs/MPC8536DS.h b/include/configs/MPC8536DS.h
index 2578bef..0d65b20 100644
--- a/include/configs/MPC8536DS.h
+++ b/include/configs/MPC8536DS.h
@@ -59,7 +59,7 @@
extern unsigned long get_board_ddr_clk(unsigned long dummy);
#endif
#define CONFIG_SYS_CLK_FREQ get_board_sys_clk(0) /* sysclk for MPC85xx */
-/* #define CONFIG_DDR_CLK_FREQ get_board_ddr_clk(0) /\* ddrclk for MPC85xx *\/ FIXME-8536*/
+#define CONFIG_DDR_CLK_FREQ get_board_ddr_clk(0)
#define CONFIG_ICS307_REFCLK_HZ 33333000 /* ICS307 clock chip ref freq */
#define CONFIG_GET_CLK_FROM_ICS307 /* decode sysclk and ddrclk freq
from ICS307 instead of switches */