From 23f9670f1aee936ca468d2d0ddb0f025defde626 Mon Sep 17 00:00:00 2001 From: York Sun Date: Fri, 27 May 2011 13:44:28 +0800 Subject: powerpc/mpc8xxx: Allow override DDR read-to-write turnaround time Add this option to allow boards to override the default read-to-write turnaround time for better performance. Signed-off-by: York Sun --- arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/powerpc/cpu/mpc8xxx/ddr') diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c b/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c index 02d069c..3824aad 100644 --- a/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c +++ b/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c @@ -267,6 +267,9 @@ static void set_timing_cfg_0(fsl_ddr_cfg_regs_t *ddr, tmrd_mclk = 2; #endif + if (popts->trwt_override) + trwt_mclk = popts->trwt; + ddr->timing_cfg_0 = (0 | ((trwt_mclk & 0x3) << 30) /* RWT */ | ((twrt_mclk & 0x3) << 28) /* WRT */ -- cgit v1.1