Revert "imx: mx6: ddr correct tRFC and tXS"

This reverts commit 059323fb6a8f21637bb617919715c2427f24777c.

This commit 059323fb6a8f21637bb617919715c2427f24777c use JESD79-3E which
is not the newest spec. Should use JESD79-3F in which tRFC is 260ns for
4Gb chip.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Tim Harvey <tharvey@gateworks.com>

diff --git a/arch/arm/cpu/armv7/mx6/ddr.c b/arch/arm/cpu/armv7/mx6/ddr.c
index cf5587be54b5a23078a3aa9c4ec517859b31c2a6..6b039e45318834d62d5d7b53892a25f0c894125c 100644 (file)
--- a/arch/arm/cpu/armv7/mx6/ddr.c
+++ b/arch/arm/cpu/armv7/mx6/ddr.c
@@ -702,8 +702,8 @@ void mx6_ddr3_cfg(const struct mx6_ddr_sysinfo *sysinfo,
                txs = DIV_ROUND_UP(170000, clkper) - 1;
                break;
        case 4: /* 4Gb per chip */
-               trfc = DIV_ROUND_UP(300000, clkper) - 1;
-               txs = DIV_ROUND_UP(310000, clkper) - 1;
+               trfc = DIV_ROUND_UP(260000, clkper) - 1;
+               txs = DIV_ROUND_UP(270000, clkper) - 1;
                break;
        case 8: /* 8Gb per chip */
                trfc = DIV_ROUND_UP(350000, clkper) - 1;