When DDR controller interleaving is eabled and less than all bank (chip-select) interleaving is seletected, the unused chip-select should be disabled.

Signed-off-by: York Sun yorksun@freescale.com --- arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c | 13 ++++++++++--- 1 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c b/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c index e82082e..e981262 100644 --- a/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c +++ b/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c @@ -1184,6 +1184,7 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts, unsigned int sr_it; unsigned int zq_en; unsigned int wrlvl_en; + int cs_en = 1;

memset(ddr, 0, sizeof(fsl_ddr_cfg_regs_t));

@@ -1250,16 +1251,20 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts, * and each controller uses rank interleaving within * itself. Therefore the starting and ending address * on each controller is twice the amount present on - * each controller. + * each controller.When */ unsigned long long ctlr_density = 0; switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) { case FSL_DDR_CS0_CS1: case FSL_DDR_CS0_CS1_AND_CS2_CS3: ctlr_density = dimm_params[0].rank_density * 2; + if (i > 1) + cs_en = 0; break; case FSL_DDR_CS2_CS3: ctlr_density = dimm_params[0].rank_density; + if (i > 0) + cs_en = 0; break; case FSL_DDR_CS0_CS1_CS2_CS3: /* @@ -1379,8 +1384,10 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts, );

debug("FSLDDR: cs[%d]_bnds = 0x%08x\n", i, ddr->cs[i].bnds); - set_csn_config(dimm_number, i, ddr, popts, dimm_params); - set_csn_config_2(i, ddr); + if (cs_en) { + set_csn_config(dimm_number, i, ddr, popts, dimm_params); + set_csn_config_2(i, ddr); + } }

set_ddr_eor(ddr, popts);