powerpc/mpc8xxx: Add x4 DDR device support

[karo-tx-uboot.git] / arch / powerpc / cpu / mpc8xxx / ddr / ctrl_regs.c

diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c b/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c
index b5e4070414a243bab25c8f6538b174112f1fea13..bf5a6f21c1bbf44110284c3f879114574176eddb 100644 (file)
--- a/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c
+++ b/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c
@@ -681,6 +681,7 @@ static void set_ddr_sdram_cfg_2(fsl_ddr_cfg_regs_t *ddr,
        unsigned int odt_cfg = 0;       /* ODT configuration */
        unsigned int num_pr;            /* Number of posted refreshes */
        unsigned int slow = 0;          /* DDR will be run less than 1250 */
+       unsigned int x4_en = 0;         /* x4 DRAM enable */
        unsigned int obc_cfg;           /* On-The-Fly Burst Chop Cfg */
        unsigned int ap_en;             /* Address Parity Enable */
        unsigned int d_init;            /* DRAM data initialization */
@@ -725,6 +726,8 @@ static void set_ddr_sdram_cfg_2(fsl_ddr_cfg_regs_t *ddr,
                ap_en = 0;
        }
 
+       x4_en = popts->x4_en ? 1 : 0;
+
 #if defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
        /* Use the DDR controller to auto initialize memory. */
        d_init = popts->ECC_init_using_memctl;
@@ -747,6 +750,7 @@ static void set_ddr_sdram_cfg_2(fsl_ddr_cfg_regs_t *ddr,
                | ((odt_cfg & 0x3) << 21)
                | ((num_pr & 0xf) << 12)
                | ((slow & 1) << 11)
+               | (x4_en << 10)
                | (qd_en << 9)
                | (unq_mrs_en << 8)
                | ((obc_cfg & 0x1) << 6)