diff options
Diffstat (limited to 'drivers/ram/rockchip/sdram_rk3399.c')
| -rw-r--r-- | drivers/ram/rockchip/sdram_rk3399.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c index 3e069ab0ef..781d1170a0 100644 --- a/drivers/ram/rockchip/sdram_rk3399.c +++ b/drivers/ram/rockchip/sdram_rk3399.c @@ -1225,8 +1225,18 @@ static void dram_all_config(struct dram_info *dram, writel(noc_timing->ddrmode.d32, &ddr_msch_regs->ddrmode); - /* rank 1 memory clock disable (dfi_dram_clk_disable = 1) */ - if (params->ch[channel].cap_info.rank == 1) + /** + * rank 1 memory clock disable (dfi_dram_clk_disable = 1) + * + * The hardware for LPDDR4 with + * - CLK0P/N connect to lower 16-bits + * - CLK1P/N connect to higher 16-bits + * + * dfi dram clk is configured via CLK1P/N, so disabling + * dfi dram clk will disable the CLK1P/N as well for lpddr4. + */ + if (params->ch[channel].cap_info.rank == 1 && + params->base.dramtype != LPDDR4) setbits_le32(&dram->chan[channel].pctl->denali_ctl[276], 1 << 17); } |