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ram: rk3399: Compute stride for 1 channel a 

Add stride computation for the sdram which support
single channel a

This configuration available in NanoPi NEO4 and the
same can work with existing rk3399-sdram-ddr3-1866.dtsi

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: YouMin Chen <cym@rock-chips.com>
Reviewed-by: Kever Yang <Kever.yang@rock-chips.com>
This commit is contained in:
Jagan Teki 2019-07-15 23:58:53 +05:30 committed by Kever Yang
parent 4b09719c38
commit 1ff5283d92
1 changed files with 4 additions and 0 deletions
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4
drivers/ram/rockchip/sdram_rk3399.c
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@ -1211,6 +1211,10 @@ static unsigned char calculate_stride(struct rk3399_sdram_params *params)
chinfo |= 1 << channel; chinfo |= 1 << channel;
} }
/* stride calculation for 1 channel */
if (params->base.num_channels == 1 && chinfo & 1)
return 0x17; /* channel a */
/* stride calculation for 2 channels, default gstride type is 256B */ /* stride calculation for 2 channels, default gstride type is 256B */
if (ch_cap[0] == ch_cap[1]) { if (ch_cap[0] == ch_cap[1]) {
cap = ch_cap[0] + ch_cap[1]; cap = ch_cap[0] + ch_cap[1];