2 * Copyright (C) 2013 Boundary Devices
3 * Copyright (C) 2013 SolidRun ltd.
4 * Copyright (C) 2013 Jon Nettleton <jon.nettleton@gmail.com>
6 * SPDX-License-Identifier: GPL-2.0+
11 * MX6Q ddr is limited to 1066 Mhz currently 1056 MHz(528 MHz clock),
12 * memory bus width: 64 bits x16/x32/x64
13 * MX6DL ddr is limited to 800 MHz(400 MHz clock)
14 * memory bus width: 64 bits x16/x32/x64
15 * MX6SOLO ddr is limited to 800 MHz(400 MHz clock)
16 * memory bus width: 32 bits x16/x32
19 DATA 4, MX6_IOM_GRP_DDR_TYPE, 0x000c0000
20 DATA 4, MX6_IOM_GRP_DDRPKE, 0x00000000
22 DATA 4, MX6_IOM_DRAM_SDCLK_0, 0x00000028
23 DATA 4, MX6_IOM_DRAM_SDCLK_1, 0x00000028
25 DATA 4, MX6_IOM_DRAM_CAS, 0x00000010
26 DATA 4, MX6_IOM_DRAM_RAS, 0x00000010
27 DATA 4, MX6_IOM_GRP_ADDDS, 0x00000010
29 DATA 4, MX6_IOM_DRAM_RESET, 0x00000010
30 DATA 4, MX6_IOM_DRAM_SDCKE0, 0x00003000
31 DATA 4, MX6_IOM_DRAM_SDCKE1, 0x00003000
32 DATA 4, MX6_IOM_DRAM_SDBA2, 0x00000000
33 DATA 4, MX6_IOM_DRAM_SDODT0, 0x00000010
34 DATA 4, MX6_IOM_DRAM_SDODT1, 0x00000010
35 DATA 4, MX6_IOM_GRP_CTLDS, 0x00000010
38 * Data Strobe: IOMUXC_SW_PAD_CTL_GRP_DDRMODE_CTL - DDR_INPUT=0, CMOS,
39 * CMOS mode saves power, but have less timing margin in case of DDR
40 * timing issue on your board you can try DDR_MODE: [= 0x00020000]
42 DATA 4, MX6_IOM_DDRMODE_CTL, 0x00020000
44 DATA 4, MX6_IOM_DRAM_SDQS0, 0x00000028
45 DATA 4, MX6_IOM_DRAM_SDQS1, 0x00000028
46 DATA 4, MX6_IOM_DRAM_SDQS2, 0x00000028
47 DATA 4, MX6_IOM_DRAM_SDQS3, 0x00000028
48 DATA 4, MX6_IOM_DRAM_SDQS4, 0x00000000
49 DATA 4, MX6_IOM_DRAM_SDQS5, 0x00000000
50 DATA 4, MX6_IOM_DRAM_SDQS6, 0x00000000
51 DATA 4, MX6_IOM_DRAM_SDQS7, 0x00000000
54 * DATA:IOMUXC_SW_PAD_CTL_GRP_DDRMODE - DDR_INPUT=0, CMOS,
55 * CMOS mode saves power, but have less timing margin in case of DDR
56 * timing issue on your board you can try DDR_MODE: [= 0x00020000]
58 DATA 4, MX6_IOM_GRP_DDRMODE, 0x00020000
60 DATA 4, MX6_IOM_GRP_B0DS, 0x00000028
61 DATA 4, MX6_IOM_GRP_B1DS, 0x00000028
62 DATA 4, MX6_IOM_GRP_B2DS, 0x00000028
63 DATA 4, MX6_IOM_GRP_B3DS, 0x00000028
64 DATA 4, MX6_IOM_GRP_B4DS, 0x00000000
65 DATA 4, MX6_IOM_GRP_B5DS, 0x00000000
66 DATA 4, MX6_IOM_GRP_B6DS, 0x00000000
67 DATA 4, MX6_IOM_GRP_B7DS, 0x00000000
69 DATA 4, MX6_IOM_DRAM_DQM0, 0x00000028
70 DATA 4, MX6_IOM_DRAM_DQM1, 0x00000028
71 DATA 4, MX6_IOM_DRAM_DQM2, 0x00000028
72 DATA 4, MX6_IOM_DRAM_DQM3, 0x00000028
73 DATA 4, MX6_IOM_DRAM_DQM4, 0x00000000
74 DATA 4, MX6_IOM_DRAM_DQM5, 0x00000000
75 DATA 4, MX6_IOM_DRAM_DQM6, 0x00000000
76 DATA 4, MX6_IOM_DRAM_DQM7, 0x00000000