ram: rk3399: Use rank mask in ca data training
Add rank_mask based on the rank number, this would keep
the ca data training loop based on the desired rank mask
value instead of looping for all values.
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>
diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c
index fe26144..b98df20 100644
--- a/drivers/ram/rockchip/sdram_rk3399.c
+++ b/drivers/ram/rockchip/sdram_rk3399.c
@@ -626,11 +626,17 @@
u32 i, tmp;
u32 obs_0, obs_1, obs_2, obs_err = 0;
u32 rank = params->ch[channel].cap_info.rank;
+ u32 rank_mask;
/* clear interrupt,PI_175 PI_INT_ACK:WR:0:17 */
writel(0x00003f7c, (&denali_pi[175]));
- for (i = 0; i < rank; i++) {
+ rank_mask = (rank == 1) ? 0x1 : 0x3;
+
+ for (i = 0; i < 4; i++) {
+ if (!(rank_mask & (1 << i)))
+ continue;
+
select_per_cs_training_index(chan, i);
/* PI_100 PI_CALVL_EN:RW:8:2 */