From 51d498f17517c541e262ad14b043095dea6d0fe7 Mon Sep 17 00:00:00 2001 From: York Sun Date: Fri, 27 May 2011 07:25:51 +0800 Subject: powerpc/mpc8xxx: Add 16-bit support for DDR3 Add support for 16-bit DDR bus. Also deal with system using 64- and 32-bit DDR devices. Signed-off-by: York Sun Signed-off-by: Kumar Gala --- arch/powerpc/cpu/mpc8xxx/ddr/main.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/cpu/mpc8xxx/ddr/main.c') diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/main.c b/arch/powerpc/cpu/mpc8xxx/ddr/main.c index c8fa123539..62a73ddf4c 100644 --- a/arch/powerpc/cpu/mpc8xxx/ddr/main.c +++ b/arch/powerpc/cpu/mpc8xxx/ddr/main.c @@ -174,7 +174,19 @@ int step_assign_addresses(fsl_ddr_info_t *pinfo, switch (pinfo->memctl_opts[i].data_bus_width) { case 2: /* 16-bit */ - printf("can't handle 16-bit mode yet\n"); + for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) { + unsigned int dw; + if (!pinfo->dimm_params[i][j].n_ranks) + continue; + dw = pinfo->dimm_params[i][j].primary_sdram_width; + if ((dw == 72 || dw == 64)) { + dbw_cap_adj[i] = 2; + break; + } else if ((dw == 40 || dw == 32)) { + dbw_cap_adj[i] = 1; + break; + } + } break; case 1: -- cgit