board/seco: Add mx6q-uq7 basic board support

Add basic SECO MX6Q/uQ7 board support (Ethernet, UART, SD are supported).
It also adds a Kconfig skeleton to later add more SECO board (supporting
SoC and board variants).

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
diff --git a/board/seco/mx6quq7/mx6quq7-2g.cfg b/board/seco/mx6quq7/mx6quq7-2g.cfg
new file mode 100644
index 0000000..159120e
--- /dev/null
+++ b/board/seco/mx6quq7/mx6quq7-2g.cfg
@@ -0,0 +1,173 @@
+/*
+ * Copyright (C) 2013 Seco USA Inc
+ *
+ * SPDX-License-Identifier:     GPL-2.0
+ *
+ * Refer doc/README.imximage for more details about how-to configure
+ * and create imximage boot image
+ *
+ * The syntax is taken as close as possible with the kwbimage
+ */
+
+/* image version */
+IMAGE_VERSION	2
+
+/*
+ * Boot Device : one of
+ * spi, sd (the board has no nand neither onenand)
+ */
+BOOT_FROM	sd
+
+#define __ASSEMBLY__
+#include <config.h>
+#include "asm/arch/mx6-ddr.h"
+#include "asm/arch/iomux.h"
+#include "asm/arch/crm_regs.h"
+
+/* DDR IO TYPE */
+DATA 4, MX6_IOM_GRP_DDRPKE,	0x00000000
+DATA 4, MX6_IOM_GRP_DDR_TYPE,	0x000C0000
+
+/* DATA STROBE */
+DATA 4, MX6_IOM_DDRMODE_CTL,	0x00020000
+DATA 4, MX6_IOM_DRAM_SDQS0,	0x00000028
+DATA 4, MX6_IOM_DRAM_SDQS1,	0x00000028
+DATA 4, MX6_IOM_DRAM_SDQS2,	0x00000028
+DATA 4, MX6_IOM_DRAM_SDQS3,	0x00000028
+DATA 4, MX6_IOM_DRAM_SDQS4,	0x00000028
+DATA 4, MX6_IOM_DRAM_SDQS5,	0x00000028
+DATA 4, MX6_IOM_DRAM_SDQS6,	0x00000028
+DATA 4, MX6_IOM_DRAM_SDQS7,	0x00000028
+
+/* DATA */
+DATA 4, MX6_IOM_GRP_DDRMODE,    0x00020000
+DATA 4, MX6_IOM_GRP_B0DS,	0x00000028
+DATA 4, MX6_IOM_GRP_B1DS,	0x00000028
+DATA 4, MX6_IOM_GRP_B2DS,	0x00000028
+DATA 4, MX6_IOM_GRP_B3DS,	0x00000028
+DATA 4, MX6_IOM_GRP_B4DS,	0x00000028
+DATA 4, MX6_IOM_GRP_B5DS,	0x00000028
+DATA 4, MX6_IOM_GRP_B6DS,	0x00000028
+DATA 4, MX6_IOM_GRP_B7DS,	0x00000028
+DATA 4, MX6_IOM_DRAM_DQM0,      0x00000028
+DATA 4, MX6_IOM_DRAM_DQM1,      0x00000028
+DATA 4, MX6_IOM_DRAM_DQM2,      0x00000028
+DATA 4, MX6_IOM_DRAM_DQM3,      0x00000028
+DATA 4, MX6_IOM_DRAM_DQM4,      0x00000028
+DATA 4, MX6_IOM_DRAM_DQM5,      0x00000028
+DATA 4, MX6_IOM_DRAM_DQM6,      0x00000028
+DATA 4, MX6_IOM_DRAM_DQM7,      0x00000028
+/* ADDRESS */
+DATA 4, MX6_IOM_GRP_ADDDS,	0x00000028
+DATA 4, MX6_IOM_DRAM_CAS,       0x00000028
+DATA 4, MX6_IOM_DRAM_RAS,       0x00000028
+
+/* CONTROL */
+DATA 4, MX6_IOM_GRP_CTLDS,	0x00000030
+DATA 4, MX6_IOM_DRAM_RESET,     0x00000028
+DATA 4, MX6_IOM_DRAM_SDBA2,     0x00000000
+DATA 4, MX6_IOM_DRAM_SDODT0,    0x00000028
+DATA 4, MX6_IOM_DRAM_SDODT1,    0x00000028
+
+/* CLOCK */
+DATA 4, MX6_IOM_DRAM_SDCLK_0,	0x00000028
+DATA 4, MX6_IOM_DRAM_SDCLK_1,	0x00000028
+
+/*
+ * DDR3 SETTINGS
+ * Read Data Bit Delay
+ */
+DATA 4, MX6_MMDC_P0_MPRDDQBY0DL,	0x33333333
+DATA 4, MX6_MMDC_P0_MPRDDQBY1DL,	0x33333333
+DATA 4, MX6_MMDC_P0_MPRDDQBY2DL,	0x33333333
+DATA 4, MX6_MMDC_P0_MPRDDQBY3DL,	0x33333333
+DATA 4, MX6_MMDC_P1_MPRDDQBY0DL,	0x33333333
+DATA 4, MX6_MMDC_P1_MPRDDQBY1DL,	0x33333333
+DATA 4, MX6_MMDC_P1_MPRDDQBY2DL,	0x33333333
+DATA 4, MX6_MMDC_P1_MPRDDQBY3DL,	0x33333333
+
+
+/* Write Leveling */
+DATA 4, MX6_MMDC_P0_MPWLDECTRL0,        0x001F001F
+DATA 4, MX6_MMDC_P0_MPWLDECTRL1,        0x001F001F
+DATA 4, MX6_MMDC_P1_MPWLDECTRL0,        0x001F0001
+DATA 4, MX6_MMDC_P1_MPWLDECTRL1,        0x001F001F
+
+/* DQS gating, read delay, write delay calibration values */
+DATA 4, MX6_MMDC_P0_MPDGCTRL0,  0x431A0326
+DATA 4, MX6_MMDC_P0_MPDGCTRL1,  0x0323031B
+DATA 4, MX6_MMDC_P1_MPDGCTRL0,  0x433F0340
+DATA 4, MX6_MMDC_P1_MPDGCTRL1,  0x0345031C
+
+/* Read calibration */
+DATA 4, MX6_MMDC_P0_MPRDDLCTL,  0x40343137
+DATA 4, MX6_MMDC_P1_MPRDDLCTL,  0x40372F45
+
+/* write calibration */
+DATA 4, MX6_MMDC_P0_MPWRDLCTL,  0x32414741
+DATA 4, MX6_MMDC_P1_MPWRDLCTL,  0x4731473C
+
+/* Complete calibration by forced measurement: */
+DATA 4, MX6_MMDC_P0_MPMUR0,     0x00000800
+DATA 4, MX6_MMDC_P1_MPMUR0,     0x00000800
+
+/*
+ * MMDC init:
+ * in DDR3, 64-bit mode, only MMDC0 is init
+ */
+DATA 4, MX6_MMDC_P0_MDPDC,	0x00020036
+DATA 4, MX6_MMDC_P0_MDOTC,	0x09444040
+
+DATA 4, MX6_MMDC_P0_MDCFG0,	0x898E7955
+DATA 4, MX6_MMDC_P0_MDCFG1,	0xFF328F64
+DATA 4, MX6_MMDC_P0_MDCFG2,	0x01FF00DB
+
+DATA 4, MX6_MMDC_P0_MDMISC,	0x00001740
+DATA 4, MX6_MMDC_P0_MDSCR,	0x00008000
+DATA 4, MX6_MMDC_P0_MDRWD,	0x000026D2
+DATA 4, MX6_MMDC_P0_MDOR,       0x008E1023
+
+/* CS0_END = 2304MB in step da 256Mb -> [(2304*8/256) - 1] */
+DATA 4, MX6_MMDC_P0_MDASP,	0x00000047
+
+/* SDE_1=0; ROW=3; BL=1; DSIZ=2 -> 64 bit */
+DATA 4, MX6_MMDC_P0_MDCTL,	0x841A0000
+
+/* Initialize DDR3 on CS_0 and CS_1 */
+DATA 4, MX6_MMDC_P0_MDSCR,	0x02088032
+DATA 4, MX6_MMDC_P0_MDSCR,	0x00008033
+DATA 4, MX6_MMDC_P0_MDSCR,	0x00048031
+
+/* P0 01c */
+/* write 0x0940 to MR0 bank_0 (Burst Type=1 (Interlived)) */
+DATA 4, MX6_MMDC_P0_MDSCR,	0x09408030
+
+/*ZQ - Calibrationi */
+DATA 4, MX6_MMDC_P0_MPZQHWCTRL, 0xa1390003
+DATA 4, MX6_MMDC_P0_MDSCR,      0x04008040
+DATA 4, MX6_MMDC_P0_MDREF,      0x00007800
+
+DATA 4, MX6_MMDC_P0_MPODTCTRL,  0x00022227
+DATA 4, MX6_MMDC_P1_MPODTCTRL,  0x00022227
+
+DATA 4, MX6_MMDC_P0_MDPDC,      0x00025576
+
+DATA 4, MX6_MMDC_P0_MAPSR,      0x00011006
+DATA 4, MX6_MMDC_P0_MDSCR,      0x00000000
+
+/* set the default clock gate to save power */
+DATA 4, CCM_CCGR0, 0x00C03F3F
+DATA 4, CCM_CCGR1, 0x0030FC03
+DATA 4, CCM_CCGR2, 0x0FFFC000
+DATA 4, CCM_CCGR3, 0x3FF00000
+DATA 4, CCM_CCGR4, 0x00FFF300
+DATA 4, CCM_CCGR5, 0x0F0000C3
+DATA 4, CCM_CCGR6, 0x000003FF
+
+/* enable AXI cache for VDOA/VPU/IPU */
+DATA 4, MX6_IOMUXC_GPR4, 0xF00000FF
+
+/* set IPU AXI-id0 Qos=0xf(bypass) AXI-id1 Qos=0x7 */
+DATA 4, MX6_IOMUXC_GPR6, 0x007F007F
+DATA 4, MX6_IOMUXC_GPR7, 0x007F007F
+