colibri_vf: adjust timing according to data sheet

Using the DDR Validation tool in Processor Expert uncovered two
timing inconsistencies. Since those timings are related to the
suspend mode they do not affect or change regular memory behaviour.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@toradex.com>

diff --git a/board/toradex/colibri_vf/colibri_vf.c b/board/toradex/colibri_vf/colibri_vf.c
index 9c5bf49..3e39912 100644 (file)
--- a/board/toradex/colibri_vf/colibri_vf.c
+++ b/board/toradex/colibri_vf/colibri_vf.c
@@ -101,15 +101,21 @@ int dram_init(void)
                .tras_lockout      = 0,
                .tdal              = 12,
                .bstlen            = 3,
-               .tdll              = 512,
+               .tdll              = 512, /* not applicable since freq. scaling
+                                          * is not used
+                                          */
                .trp_ab            = 6,
                .tref              = 3120,
                .trfc              = 64,
                .tref_int          = 0,
                .tpdex             = 3,
                .txpdll            = 10,
-               .txsnr             = 48,
-               .txsr              = 468,
+               .txsnr             = 68,  /* changed to conform to JEDEC
+                                          * specifications
+                                          */
+               .txsr              = 506, /* changed to conform to JEDEC
+                                          * specifications
+                                          */
                .cksrx             = 5,
                .cksre             = 5,
                .freq_chg_en       = 0,