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sunxi: H616: dram: fix LPDDR3 TPR6 parsing

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Allwinner's DRAM initialisation code defines a parameter named TPR6,
presumably containing some "Vref" parameter, but containing values for
*all* DRAM types. The runtime code selects one byte based on the DRAM
type used.
This selection code was wrong for LPDDR3, the value is encoded in
bits [23:16], not [15:8]. Fix that in the code, which also aligns it
with the very similar code for the A133 and A523.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Reported-by: Philippe Simons <simons.philippe@gmail.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Paul Kocialkowski <paulk@sys-base.io>
This commit is contained in:
Jernej Skrabec 2026-04-05 21:59:26 +02:00 committed by Andre Przywara
parent 9d3bbc99b9
commit 5a24cc0740
1 changed files with 1 additions and 1 deletions
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arch/arm/mach-sunxi/dram_sun50i_h616.c
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@ -975,7 +975,7 @@ static bool mctl_phy_init(const struct dram_para *para,
val = para->tpr6 & 0xff;
break;
case SUNXI_DRAM_TYPE_LPDDR3:
val = para->tpr6 >> 8 & 0xff;
val = para->tpr6 >> 16 & 0xff;
break;
case SUNXI_DRAM_TYPE_LPDDR4:
val = para->tpr6 >> 24 & 0xff;