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arm: mx6: ddr: fix cs0_end calculation

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Current way of calculation CS0_END field for MMDCx_MDASP register
is problematic because in most cases the user is forced to define
cs_density in an unnatural way: as value - 2, instead of value.

This breaks the abstraction provided by struct mx6_ddr_sysinfo
because the user is forced to be aware of the way the calculation
is performed.

Refactor the calculation.

Cc: Stefano Babic <sbabic@denx.de>
Cc: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
This commit is contained in:
Nikita Kiryanov 2014-08-20 15:08:58 +03:00 committed by Stefano Babic
parent 08155289a4
commit 07ee927d2c
1 changed files with 1 additions and 3 deletions
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4
arch/arm/cpu/armv7/mx6/ddr.c
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@ -309,9 +309,7 @@ void mx6_dram_cfg(const struct mx6_ddr_sysinfo *sysinfo,
twtr = ROUND(MAX(4 * clkper, 7500) / clkper, 1) - 1;
trcd = trp;
trtp = twtr;
cs0_end = (4 * sysinfo->cs_density <= 120) ?
4 * sysinfo->cs_density + 7 :
127;
cs0_end = 4 * sysinfo->cs_density - 1;
debug("density:%d Gb (%d Gb per chip)\n",
sysinfo->cs_density, ddr3_cfg->density);