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authorTom Rini <trini@ti.com>2013-11-07 11:42:57 -0500
committerTom Rini <trini@ti.com>2013-12-04 08:11:45 -0500
commit39245c8699c68f85a5aaa3153d954370920d09c0 (patch)
treef402a009ddf3ddbbe9b7732b1a6b8f87e7bb478d /arch/arm/cpu/armv7/am33xx
parent340e6c830053846d48ba97a73adfac3f5cadfd7e (diff)
downloadblackbird-obmc-uboot-39245c8699c68f85a5aaa3153d954370920d09c0.tar.gz
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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 'arch/arm/cpu/armv7/am33xx')
-rw-r--r--arch/arm/cpu/armv7/am33xx/ddr.c7
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/arm/cpu/armv7/am33xx/ddr.c b/arch/arm/cpu/armv7/am33xx/ddr.c
index fa697c74ab..5b0454c3ea 100644
--- a/arch/arm/cpu/armv7/am33xx/ddr.c
+++ b/arch/arm/cpu/armv7/am33xx/ddr.c
@@ -89,15 +89,12 @@ void config_ddr_phy(const struct emif_regs *regs, int nr)
void config_cmd_ctrl(const struct cmd_control *cmd, int nr)
{
writel(cmd->cmd0csratio, &ddr_cmd_reg[nr]->cm0csratio);
- writel(cmd->cmd0dldiff, &ddr_cmd_reg[nr]->cm0dldiff);
writel(cmd->cmd0iclkout, &ddr_cmd_reg[nr]->cm0iclkout);
writel(cmd->cmd1csratio, &ddr_cmd_reg[nr]->cm1csratio);
- writel(cmd->cmd1dldiff, &ddr_cmd_reg[nr]->cm1dldiff);
writel(cmd->cmd1iclkout, &ddr_cmd_reg[nr]->cm1iclkout);
writel(cmd->cmd2csratio, &ddr_cmd_reg[nr]->cm2csratio);
- writel(cmd->cmd2dldiff, &ddr_cmd_reg[nr]->cm2dldiff);
writel(cmd->cmd2iclkout, &ddr_cmd_reg[nr]->cm2iclkout);
}
@@ -121,10 +118,6 @@ void config_ddr_data(const struct ddr_data *data, int nr)
&(ddr_data_reg[nr]+i)->dt0fwsratio0);
writel(data->datawrsratio0,
&(ddr_data_reg[nr]+i)->dt0wrsratio0);
- writel(data->datauserank0delay,
- &(ddr_data_reg[nr]+i)->dt0rdelays0);
- writel(data->datadldiff0,
- &(ddr_data_reg[nr]+i)->dt0dldiff0);
}
}
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