diff options
| author | Tom Rini <trini@ti.com> | 2013-11-07 11:42:57 -0500 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2013-12-04 08:11:45 -0500 |
| commit | 39245c8699c68f85a5aaa3153d954370920d09c0 (patch) | |
| tree | f402a009ddf3ddbbe9b7732b1a6b8f87e7bb478d /board/ti/ti816x | |
| parent | 340e6c830053846d48ba97a73adfac3f5cadfd7e (diff) | |
| download | talos-obmc-uboot-39245c8699c68f85a5aaa3153d954370920d09c0.tar.gz talos-obmc-uboot-39245c8699c68f85a5aaa3153d954370920d09c0.zip | |
am33xx: Stop modifying certain EMIF4D registers
Based on the definitive guide to EMIF configuration[1] certain registers
that we have been modifying (and are documented registers) should be
left in their reset values rather than modified. This has been tested
on AM335x GP EVM and Beaglebone White.
[1]: http://processors.wiki.ti.com/index.php/AM335x_EMIF_Configuration_tips
Cc: Enric Balletbo i Serra <eballetbo@iseebcn.com>
Cc: Javier Martinez Canillas <javier@dowhile0.org>
Cc: Heiko Schocher <hs@denx.de>
Cc: Lars Poeschel <poeschel@lemonage.de>
Signed-off-by: Tom Rini <trini@ti.com>
Tested-by: Matt Porter <matt.porter@linaro.org>
Diffstat (limited to 'board/ti/ti816x')
| -rw-r--r-- | board/ti/ti816x/evm.c | 17 |
1 files changed, 0 insertions, 17 deletions
diff --git a/board/ti/ti816x/evm.c b/board/ti/ti816x/evm.c index 74d35e936d..a53859e52e 100644 --- a/board/ti/ti816x/evm.c +++ b/board/ti/ti816x/evm.c @@ -59,21 +59,16 @@ static struct ddr_data ddr2_data = { .datagiratio0 = ((0x0<<10) | (0x0<<0)), .datafwsratio0 = ((0x13A<<10) | (0x13A<<0)), .datawrsratio0 = ((0x8A<<10) | (0x8A<<0)), - .datauserank0delay = 0x1, - .datadldiff0 = 0x0, /* depend on cpu rev, set later */ }; static struct cmd_control ddr2_ctrl = { .cmd0csratio = 0x80, - .cmd0dldiff = 0x04, /* reset value is 0x4 */ .cmd0iclkout = 0x00, .cmd1csratio = 0x80, - .cmd1dldiff = 0x04, /* reset value is 0x4 */ .cmd1iclkout = 0x00, .cmd2csratio = 0x80, - .cmd2dldiff = 0x04, /* reset value is 0x4 */ .cmd2iclkout = 0x00, }; @@ -150,21 +145,16 @@ static struct ddr_data ddr3_data = { .datagiratio0 = ((0x20<<10) | 0x20<<0), .datafwsratio0 = ((RD_DQS_GATE<<10) | (RD_DQS_GATE<<0)), .datawrsratio0 = (((WR_DQS+0x40)<<10) | ((WR_DQS+0x40)<<0)), - .datauserank0delay = 0x1, - .datadldiff0 = 0x0, /* depend on cpu rev, set later */ }; static const struct cmd_control ddr3_ctrl = { .cmd0csratio = 0x100, - .cmd0dldiff = 0x004, /* reset value is 0x4 */ .cmd0iclkout = 0x001, .cmd1csratio = 0x100, - .cmd1dldiff = 0x004, /* reset value is 0x4 */ .cmd1iclkout = 0x001, .cmd2csratio = 0x100, - .cmd2dldiff = 0x004, /* reset value is 0x4 */ .cmd2iclkout = 0x001, }; @@ -198,11 +188,6 @@ void sdram_init(void) config_dmm(&evm_lisa_map_regs); #ifdef CONFIG_TI816X_EVM_DDR2 - ddr2_data.datadldiff0 = (get_cpu_rev() == 0x1 ? 0x0 : 0xF); - ddr2_ctrl.cmd0dldiff = (get_cpu_rev() == 0x1 ? 0x0 : 0xF); - ddr2_ctrl.cmd1dldiff = (get_cpu_rev() == 0x1 ? 0x0 : 0xF); - ddr2_ctrl.cmd2dldiff = (get_cpu_rev() == 0x1 ? 0x0 : 0xF); - if (CONFIG_TI816X_USE_EMIF0) { ddr2_emif0_regs.emif_ddr_phy_ctlr_1 = (get_cpu_rev() == 0x1 ? 0x0000010B : 0x0000030B); @@ -217,8 +202,6 @@ void sdram_init(void) #endif #ifdef CONFIG_TI816X_EVM_DDR3 - ddr3_data.datadldiff0 = (get_cpu_rev() == 0x1 ? 0x0 : 0xF); - if (CONFIG_TI816X_USE_EMIF0) config_ddr(0, 0, &ddr3_data, &ddr3_ctrl, &ddr3_emif0_regs, 0); |
