plat: imx7: Add PicoPi iMX7D basic support

The PicoPi iMX7D is a 2 board development board consisting of
a System-on-Module and a carrier baseboard and optimized for
the Internet-of-Things (IoT).

This patch add basic support to this board.
Signed-off-by: Jun Nie <jun.nie@linaro.org>
Reviewed-by: Louis Mayencourt <louis.mayencourt@arm.com>
Change-Id: I009d85819c4f73b7063aab73d0f6ee74e6ef3fc4

plat/imx/common/include/imx_io_mux.h

 /*
- * Copyright 2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright 2018-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -8,6 +8,7 @@
 #define IMX_IO_MUX_H
 
 #include <stdint.h>
+#include <lib/utils_def.h>
 
 /*
  * i.MX 7Solo Applications Processor Reference Manual, Rev. 0.1, 08/2016
@@ -20,7 +21,10 @@
 #define IOMUXC_SW_MUX_CTL_PAD_GPIO1_IO11_OFFSET		0x0020
 #define IOMUXC_SW_MUX_CTL_PAD_GPIO1_IO12_OFFSET		0x0024
 #define IOMUXC_SW_MUX_CTL_PAD_GPIO1_IO13_OFFSET		0x0028
+
 #define IOMUXC_SW_MUX_CTL_PAD_GPIO1_IO14_OFFSET		0x002C
+#define IOMUXC_SW_MUX_CTL_PAD_GPIO1_IO14_ALT1_SD3_CD_B	BIT(0)
+
 #define IOMUXC_SW_MUX_CTL_PAD_GPIO1_IO15_OFFSET		0x0030
 
 #define IOMUXC_SW_MUX_CTL_PAD_EPDC_DATA00_OFFSET	0x0034
@@ -121,8 +125,24 @@
 #define IOMUXC_SW_MUX_CTL_PAD_I2C2_SDA_OFFSET		0x0154
 #define IOMUXC_SW_MUX_CTL_PAD_I2C3_SCL_OFFSET		0x0158
 #define IOMUXC_SW_MUX_CTL_PAD_I2C3_SDA_OFFSET		0x015C
+
 #define IOMUXC_SW_MUX_CTL_PAD_I2C4_SCL_OFFSET		0x0160
+#define IOMUXC_SW_MUX_CTL_PAD_I2C4_SCL_ALT0_I2C4_SCL		0x0
+#define IOMUXC_SW_MUX_CTL_PAD_I2C4_SCL_ALT1_UART5_RX_DATA	BIT(0)
+#define IOMUXC_SW_MUX_CTL_PAD_I2C4_SCL_ALT2_WDOG4_WDOG_B	BIT(1)
+#define IOMUXC_SW_MUX_CTL_PAD_I2C4_SCL_ALT3_CSI_PIXCLK		(BIT(1) | BIT(0))
+#define IOMUXC_SW_MUX_CTL_PAD_I2C4_SCL_ALT4_USB_OTG1_ID		BIT(2)
+#define IOMUXC_SW_MUX_CTL_PAD_I2C4_SCL_ALT5_GPIO4_IO14		(BIT(2) | BIT(0))
+#define IOMUXC_SW_MUX_CTL_PAD_I2C4_SCL_ALT6_EPDC_VCOM0		(BIT(2) | BIT(1))
+
 #define IOMUXC_SW_MUX_CTL_PAD_I2C4_SDA_OFFSET		0x0164
+#define IOMUXC_SW_MUX_CTL_PAD_I2C4_SDA_ALT0_I2C4_SDA		0x0
+#define IOMUXC_SW_MUX_CTL_PAD_I2C4_SDA_ALT1_UART5_TX_DATA	BIT(0)
+#define IOMUXC_SW_MUX_CTL_PAD_I2C4_SDA_ALT2_WDOG4_WDOG_RST_B_DEB BIT(1)
+#define IOMUXC_SW_MUX_CTL_PAD_I2C4_SDA_ALT3_CSI_MCLK		(BIT(1) | BIT(0))
+#define IOMUXC_SW_MUX_CTL_PAD_I2C4_SDA_ALT4_USB_OTG2_ID		BIT(2)
+#define IOMUXC_SW_MUX_CTL_PAD_I2C4_SDA_ALT5_GPIO4_IO15		(BIT(1) | BIT(0))
+#define IOMUXC_SW_MUX_CTL_PAD_I2C4_SDA_ALT6_EPDC_VCOM1		(BIT(2) | BIT(1))
 
 #define IOMUXC_SW_MUX_CTL_PAD_ECSPI1_SCLK_OFFSET	0x0168
 #define IOMUXC_SW_MUX_CTL_PAD_ECSPI1_SCLK_ALT0_ECSPI1_SCLK	0x00
@@ -165,6 +185,7 @@
 #define IOMUXC_SW_MUX_CTL_PAD_SD2_DATA1_OFFSET		0x01C4
 #define IOMUXC_SW_MUX_CTL_PAD_SD2_DATA2_OFFSET		0x01C8
 #define IOMUXC_SW_MUX_CTL_PAD_SD2_DATA3_OFFSET		0x01CC
+
 #define IOMUXC_SW_MUX_CTL_PAD_SD3_CLK_OFFSET		0x01D0
 #define IOMUXC_SW_MUX_CTL_PAD_SD3_CMD_OFFSET		0x01D4
 #define IOMUXC_SW_MUX_CTL_PAD_SD3_DATA0_OFFSET		0x01D8
@@ -391,6 +412,7 @@
 #define IOMUXC_SW_PAD_CTL_PAD_SD2_DATA1_OFFSET		0x0434
 #define IOMUXC_SW_PAD_CTL_PAD_SD2_DATA2_OFFSET		0x0438
 #define IOMUXC_SW_PAD_CTL_PAD_SD2_DATA3_OFFSET		0x043C
+
 #define IOMUXC_SW_PAD_CTL_PAD_SD3_CLK_OFFSET		0x0440
 #define IOMUXC_SW_PAD_CTL_PAD_SD3_CMD_OFFSET		0x0444
 #define IOMUXC_SW_PAD_CTL_PAD_SD3_DATA0_OFFSET		0x0448
@@ -403,6 +425,19 @@
 #define IOMUXC_SW_PAD_CTL_PAD_SD3_DATA7_OFFSET		0x0464
 #define IOMUXC_SW_PAD_CTL_PAD_SD3_STROBE_OFFSET		0x0468
 #define IOMUXC_SW_PAD_CTL_PAD_SD3_RESET_B_OFFSET	0x046C
+#define IOMUXC_SW_PAD_CTL_PAD_SD3_DSE_0_X1		0
+#define IOMUXC_SW_PAD_CTL_PAD_SD3_DSE_1_X4		BIT(0)
+#define IOMUXC_SW_PAD_CTL_PAD_SD3_DSE_2_X2		BIT(1)
+#define IOMUXC_SW_PAD_CTL_PAD_SD3_DSE_3_X6		(BIT(1) | BIT(0))
+#define IOMUXC_SW_PAD_CTL_PAD_SD3_DSE_1_X4		BIT(0)
+#define IOMUXC_SW_PAD_CTL_PAD_SD3_SLEW_SLOW		BIT(2)
+#define IOMUXC_SW_PAD_CTL_PAD_SD3_SLEW_FAST		0
+#define IOMUXC_SW_PAD_CTL_PAD_SD3_HYS			BIT(3)
+#define IOMUXC_SW_PAD_CTL_PAD_SD3_PE			BIT(4)
+#define IOMUXC_SW_PAD_CTL_PAD_SD3_PD_100K		(0 << 5)
+#define IOMUXC_SW_PAD_CTL_PAD_SD3_PU_5K			(1 << 5)
+#define IOMUXC_SW_PAD_CTL_PAD_SD3_PU_47K		(2 << 5)
+#define IOMUXC_SW_PAD_CTL_PAD_SD3_PU_100K		(3 << 5)
 
 #define IOMUXC_SW_PAD_CTL_PAD_SAI1_RX_DATA_OFFSET	0x0470
 #define IOMUXC_SW_PAD_CTL_PAD_SAI1_TX_BCLK_OFFSET	0x0474
@@ -588,7 +623,15 @@
 #define IOMUXC_UART4_RTS_B_SELECT_INPUT_OFFSET		0x0708
 #define IOMUXC_UART4_RX_DATA_SELECT_INPUT_OFFSET	0x070C
 #define IOMUXC_UART5_RTS_B_SELECT_INPUT_OFFSET		0x0710
+
 #define IOMUXC_UART5_RX_DATA_SELECT_INPUT_OFFSET	0x0714
+#define IOMUXC_UART5_RX_DATA_SELECT_INPUT_I2C4_SCL_ALT1	0x00
+#define IOMUXC_UART5_RX_DATA_SELECT_INPUT_I2C4_SDA_ALT1	BIT(0)
+#define IOMUXC_UART5_RX_DATA_SELECT_INPUT_SAI1_RX_DATA_ALT2	BIT(1)
+#define IOMUXC_UART5_RX_DATA_SELECT_INPUT_SAI1_TX_BCLK_ALT2	(BIT(1) | BIT(0))
+#define IOMUXC_UART5_RX_DATA_SELECT_INPUT_GPIO1_IO06_ALT3	BIT(2)
+#define IOMUXC_UART5_RX_DATA_SELECT_INPUT_GPIO1_IO07_ALT3	(BIT(2) | BIT(1))
+
 #define IOMUXC_UART6_RTS_B_SELECT_INPUT_OFFSET		0x0718
 #define IOMUXC_UART6_RX_DATA_SELECT_INPUT_OFFSET	0x071C
 #define IOMUXC_UART7_RTS_B_SELECT_INPUT_OFFSET		0x0720

plat/imx/imx7/picopi/include/platform_def.h

+/*
+ * Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PLATFORM_DEF_H
+#define PLATFORM_DEF_H
+
+#include <arch.h>
+#include <common/tbbr/tbbr_img_def.h>
+#include <plat/common/common_def.h>
+
+#define PLATFORM_STACK_SIZE		0x1000
+
+#define PLATFORM_MAX_CPUS_PER_CLUSTER	2
+#define PLATFORM_CLUSTER_COUNT		1
+#define PLATFORM_CLUSTER0_CORE_COUNT	PLATFORM_MAX_CPUS_PER_CLUSTER
+
+#define PLATFORM_CORE_COUNT		PLATFORM_CLUSTER0_CORE_COUNT
+
+#define PICOPI_PRIMARY_CPU		0
+
+#define PLAT_NUM_PWR_DOMAINS		(PLATFORM_CLUSTER_COUNT + \
+					PLATFORM_CORE_COUNT)
+#define PLAT_MAX_PWR_LVL		MPIDR_AFFLVL1
+
+#define PLAT_MAX_RET_STATE		1
+#define PLAT_MAX_OFF_STATE		2
+
+/* Local power state for power domains in Run state. */
+#define PLAT_LOCAL_STATE_RUN		0
+
+/* Local power state for retention. Valid only for CPU power domains */
+#define PLAT_LOCAL_STATE_RET		1
+
+/*
+ * Local power state for OFF/power-down. Valid for CPU and cluster power
+ * domains.
+ */
+#define PLAT_LOCAL_STATE_OFF		2
+
+/*
+ * Macros used to parse state information from State-ID if it is using the
+ * recommended encoding for State-ID.
+ */
+#define PLAT_LOCAL_PSTATE_WIDTH		4
+#define PLAT_LOCAL_PSTATE_MASK		((1 << PLAT_LOCAL_PSTATE_WIDTH) - 1)
+
+/*
+ * Some data must be aligned on the biggest cache line size in the platform.
+ * This is known only to the platform as it might have a combination of
+ * integrated and external caches.
+ * i.MX7 has a 32 byte cacheline size
+ * i.MX 7Dual Applications Processor Reference Manual, Rev. 1, 01/2018 pg 298
+ */
+#define CACHE_WRITEBACK_SHIFT		4
+#define CACHE_WRITEBACK_GRANULE		(1 << CACHE_WRITEBACK_SHIFT)
+
+/*
+ * Partition memory into secure BootROM, OCRAM_S, non-secure DRAM, secure DRAM
+ */
+#define BOOT_ROM_BASE			0x00000000
+#define BOOT_ROM_SIZE			0x00020000
+
+#define OCRAM_S_BASE			0x00180000
+#define OCRAM_S_SIZE			0x00008000
+
+/* Controller maps 2GB, board contains 512 MB. 0x80000000 - 0xa0000000 */
+#define DRAM_BASE			0x80000000
+#define DRAM_SIZE			0x20000000
+#define DRAM_LIMIT			(DRAM_BASE + DRAM_SIZE)
+
+/* Place OPTEE at minus 32 MB from the end of memory. 0x9e000000 - 0xa0000000 */
+#define IMX7_OPTEE_SIZE			0x02000000
+#define IMX7_OPTEE_BASE			(DRAM_LIMIT - IMX7_OPTEE_SIZE)
+#define IMX7_OPTEE_LIMIT		(IMX7_OPTEE_BASE + IMX7_OPTEE_SIZE)
+
+/* Place ATF directly beneath OPTEE. 0x9df00000 - 0x9e000000 */
+#define BL2_RAM_SIZE			0x00100000
+#define BL2_RAM_BASE			(IMX7_OPTEE_BASE - BL2_RAM_SIZE)
+#define BL2_RAM_LIMIT			(BL2_RAM_BASE + BL2_RAM_SIZE)
+
+/* Optional Mailbox. Only relevant on i.MX7D. 0x9deff000 - 0x9df00000*/
+#define SHARED_RAM_SIZE			0x00001000
+#define SHARED_RAM_BASE			(BL2_RAM_BASE - SHARED_RAM_SIZE)
+#define SHARED_RAM_LIMIT		(SHARED_RAM_BASE + SHARED_RAM_SIZE)
+
+/* Define the absolute location of u-boot 0x87800000 - 0x87900000 */
+#define IMX7_UBOOT_SIZE			0x00100000
+#define IMX7_UBOOT_BASE			(DRAM_BASE + 0x7800000)
+#define IMX7_UBOOT_LIMIT		(IMX7_UBOOT_BASE + IMX7_UBOOT_SIZE)
+
+/* Define FIP image absolute location 0x80000000 - 0x80100000 */
+#define IMX7_FIP_SIZE			0x00100000
+#define IMX7_FIP_BASE			(DRAM_BASE)
+#define IMX7_FIP_LIMIT			(IMX7_FIP_BASE + IMX7_FIP_SIZE)
+
+/* Define FIP image location at 1MB offset */
+#define IMX7_FIP_MMC_BASE		(1024 * 1024)
+
+/* Define the absolute location of DTB 0x83000000 - 0x83100000 */
+#define IMX7_DTB_SIZE			0x00100000
+#define IMX7_DTB_BASE			(DRAM_BASE + 0x03000000)
+#define IMX7_DTB_LIMIT			(IMX7_DTB_BASE + IMX7_DTB_SIZE)
+
+/* Define the absolute location of DTB Overlay 0x83100000 - 0x83101000 */
+#define IMX7_DTB_OVERLAY_SIZE		0x00001000
+#define IMX7_DTB_OVERLAY_BASE		IMX7_DTB_LIMIT
+#define IMX7_DTB_OVERLAY_LIMIT		(IMX7_DTB_OVERLAY_BASE + \
+					 IMX7_DTB_OVERLAY_SIZE)
+/*
+ * BL2 specific defines.
+ *
+ * Put BL2 just below BL3-1. BL2_BASE is calculated using the current BL2 debug
+ * size plus a little space for growth.
+ */
+#define BL2_BASE		BL2_RAM_BASE
+#define BL2_LIMIT		(BL2_RAM_BASE + BL2_RAM_SIZE)
+
+/*
+ * BL3-2/OPTEE
+ */
+# define BL32_BASE		IMX7_OPTEE_BASE
+# define BL32_LIMIT		(IMX7_OPTEE_BASE + IMX7_OPTEE_SIZE)
+
+/*
+ * BL3-3/U-BOOT
+ */
+#define BL33_BASE		IMX7_UBOOT_BASE
+#define BL33_LIMIT		(IMX7_UBOOT_BASE + IMX7_UBOOT_SIZE)
+
+/*
+ * ATF's view of memory
+ *
+ * 0xa0000000 +-----------------+
+ *            |       DDR       | BL32/OPTEE
+ * 0x9e000000 +-----------------+
+ *            |       DDR       | BL23 ATF
+ * 0x9df00000 +-----------------+
+ *            |       DDR       | Shared MBOX RAM
+ * 0x9de00000 +-----------------+
+ *            |       DDR       | Unallocated
+ * 0x87900000 +-----------------+
+ *            |       DDR       | BL33/U-BOOT
+ * 0x87800000 +-----------------+
+ *            |       DDR       | Unallocated
+ * 0x83100000 +-----------------+
+ *            |       DDR       | DTB
+ * 0x83000000 +-----------------+
+ *            |       DDR       | Unallocated
+ * 0x80100000 +-----------------+
+ *            |       DDR       | FIP
+ * 0x80000000 +-----------------+
+ *            |     SOC I/0     |
+ * 0x00a00000 +-----------------+
+ *            |      OCRAM      | Not used
+ * 0x00900000 +-----------------+
+ *            |     SOC I/0     |
+ * 0x00188000 +-----------------+
+ *            |     OCRAM_S     | Not used
+ * 0x00180000 +-----------------+
+ *            |     SOC I/0     |
+ * 0x00020000 +-----------------+
+ *            |     BootROM     | BL1
+ * 0x00000000 +-----------------+
+ */
+
+#define PLAT_PHY_ADDR_SPACE_SIZE	(1ULL << 32)
+#define PLAT_VIRT_ADDR_SPACE_SIZE	(1ULL << 32)
+#define MAX_MMAP_REGIONS		10
+#define MAX_XLAT_TABLES			6
+#define MAX_IO_DEVICES			2
+#define MAX_IO_HANDLES			3
+#define MAX_IO_BLOCK_DEVICES		1
+
+/* UART defines */
+#define PLAT_IMX7_BOOT_UART_BASE	MXC_UART5_BASE
+#define PLAT_IMX7_BOOT_UART_CLK_IN_HZ	24000000
+#define PLAT_IMX7_CONSOLE_BAUDRATE	115200
+
+/* MMC defines */
+#ifndef PLAT_PICOPI_SD
+#define PLAT_PICOPI_SD 3
+#endif
+
+#if PLAT_PICOPI_SD == 1
+#define PLAT_PICOPI_BOOT_MMC_BASE	USDHC1_BASE
+#endif /* PLAT_PICOPI_SD == 1 */
+
+#if PLAT_PICOPI_SD == 2
+#define PLAT_PICOPI_BOOT_MMC_BASE	USDHC2_BASE
+#endif /* PLAT_PICOPI_SD == 2 */
+
+#if PLAT_PICOPI_SD == 3
+#define PLAT_PICOPI_BOOT_MMC_BASE	USDHC3_BASE
+#endif /* PLAT_PICOPI_SD == 3 */
+
+/*
+ * System counter
+ */
+#define SYS_COUNTER_FREQ_IN_TICKS	8000000		/* 8 MHz */
+
+#endif /* PLATFORM_DEF_H */

plat/imx/imx7/picopi/picopi_bl2_el3_setup.c

+/*
+ * Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+
+#include <platform_def.h>
+
+#include <common/debug.h>
+#include <drivers/console.h>
+#include <drivers/mmc.h>
+#include <lib/utils.h>
+
+#include <imx_caam.h>
+#include <imx_clock.h>
+#include <imx_io_mux.h>
+#include <imx_uart.h>
+#include <imx_usdhc.h>
+#include <imx7_def.h>
+
+#define UART5_CLK_SELECT (CCM_TARGET_ROOT_ENABLE |\
+			  CCM_TRGT_MUX_UART5_CLK_ROOT_OSC_24M)
+
+#define USDHC_CLK_SELECT (CCM_TARGET_ROOT_ENABLE |\
+			  CCM_TRGT_MUX_NAND_USDHC_BUS_CLK_ROOT_AHB |\
+			  CCM_TARGET_POST_PODF(2))
+
+#define USB_CLK_SELECT (CCM_TARGET_ROOT_ENABLE |\
+			CCM_TRGT_MUX_USB_HSIC_CLK_ROOT_SYS_PLL)
+
+#define PICOPI_UART5_RX_MUX \
+	IOMUXC_SW_MUX_CTL_PAD_I2C4_SCL_ALT1_UART5_RX_DATA
+
+#define PICOPI_UART5_TX_MUX \
+	IOMUXC_SW_MUX_CTL_PAD_I2C4_SDA_ALT1_UART5_TX_DATA
+
+#define PICOPI_SD3_FEATURES \
+	(IOMUXC_SW_PAD_CTL_PAD_SD3_PU_47K            | \
+	 IOMUXC_SW_PAD_CTL_PAD_SD3_PE                | \
+	 IOMUXC_SW_PAD_CTL_PAD_SD3_HYS               | \
+	 IOMUXC_SW_PAD_CTL_PAD_SD3_SLEW_SLOW         | \
+	 IOMUXC_SW_PAD_CTL_PAD_SD3_DSE_3_X6)
+
+static void picopi_setup_pinmux(void)
+{
+	/* Configure UART5 TX */
+	imx_io_muxc_set_pad_alt_function(IOMUXC_SW_MUX_CTL_PAD_I2C4_SDA_OFFSET,
+					 PICOPI_UART5_TX_MUX);
+	/* Configure UART5 RX */
+	imx_io_muxc_set_pad_alt_function(IOMUXC_SW_MUX_CTL_PAD_I2C4_SCL_OFFSET,
+					 PICOPI_UART5_RX_MUX);
+
+	/* Configure USDHC3 */
+	imx_io_muxc_set_pad_alt_function(IOMUXC_SW_MUX_CTL_PAD_SD3_CLK_OFFSET, 0);
+	imx_io_muxc_set_pad_alt_function(IOMUXC_SW_MUX_CTL_PAD_SD3_CMD_OFFSET, 0);
+	imx_io_muxc_set_pad_alt_function(IOMUXC_SW_MUX_CTL_PAD_SD3_DATA0_OFFSET, 0);
+	imx_io_muxc_set_pad_alt_function(IOMUXC_SW_MUX_CTL_PAD_SD3_DATA1_OFFSET, 0);
+	imx_io_muxc_set_pad_alt_function(IOMUXC_SW_MUX_CTL_PAD_SD3_DATA2_OFFSET, 0);
+	imx_io_muxc_set_pad_alt_function(IOMUXC_SW_MUX_CTL_PAD_SD3_DATA3_OFFSET, 0);
+	imx_io_muxc_set_pad_alt_function(IOMUXC_SW_MUX_CTL_PAD_SD3_DATA4_OFFSET, 0);
+	imx_io_muxc_set_pad_alt_function(IOMUXC_SW_MUX_CTL_PAD_SD3_DATA5_OFFSET, 0);
+	imx_io_muxc_set_pad_alt_function(IOMUXC_SW_MUX_CTL_PAD_SD3_DATA6_OFFSET, 0);
+	imx_io_muxc_set_pad_alt_function(IOMUXC_SW_MUX_CTL_PAD_SD3_DATA7_OFFSET, 0);
+	imx_io_muxc_set_pad_alt_function(IOMUXC_SW_MUX_CTL_PAD_GPIO1_IO14_OFFSET,
+					 IOMUXC_SW_MUX_CTL_PAD_GPIO1_IO14_ALT1_SD3_CD_B);
+
+	imx_io_muxc_set_pad_features(IOMUXC_SW_PAD_CTL_PAD_SD3_CLK_OFFSET,
+				     PICOPI_SD3_FEATURES);
+	imx_io_muxc_set_pad_features(IOMUXC_SW_PAD_CTL_PAD_SD3_CMD_OFFSET,
+				     PICOPI_SD3_FEATURES);
+	imx_io_muxc_set_pad_features(IOMUXC_SW_PAD_CTL_PAD_SD3_DATA0_OFFSET,
+				     PICOPI_SD3_FEATURES);
+	imx_io_muxc_set_pad_features(IOMUXC_SW_PAD_CTL_PAD_SD3_DATA1_OFFSET,
+				     PICOPI_SD3_FEATURES);
+	imx_io_muxc_set_pad_features(IOMUXC_SW_PAD_CTL_PAD_SD3_DATA2_OFFSET,
+				     PICOPI_SD3_FEATURES);
+	imx_io_muxc_set_pad_features(IOMUXC_SW_PAD_CTL_PAD_SD3_DATA3_OFFSET,
+				     PICOPI_SD3_FEATURES);
+	imx_io_muxc_set_pad_features(IOMUXC_SW_PAD_CTL_PAD_SD3_DATA4_OFFSET,
+				     PICOPI_SD3_FEATURES);
+	imx_io_muxc_set_pad_features(IOMUXC_SW_PAD_CTL_PAD_SD3_DATA5_OFFSET,
+				     PICOPI_SD3_FEATURES);
+	imx_io_muxc_set_pad_features(IOMUXC_SW_PAD_CTL_PAD_SD3_DATA6_OFFSET,
+				     PICOPI_SD3_FEATURES);
+	imx_io_muxc_set_pad_features(IOMUXC_SW_PAD_CTL_PAD_SD3_DATA7_OFFSET,
+				     PICOPI_SD3_FEATURES);
+	imx_io_muxc_set_pad_features(IOMUXC_SW_PAD_CTL_PAD_GPIO1_IO14_OFFSET,
+				     PICOPI_SD3_FEATURES);
+}
+
+static void picopi_usdhc_setup(void)
+{
+	imx_usdhc_params_t params;
+	struct mmc_device_info info;
+
+	zeromem(&params, sizeof(imx_usdhc_params_t));
+	params.reg_base = PLAT_PICOPI_BOOT_MMC_BASE;
+	params.clk_rate = 25000000;
+	params.bus_width = MMC_BUS_WIDTH_8;
+	info.mmc_dev_type = MMC_IS_EMMC;
+	imx_usdhc_init(&params, &info);
+}
+
+static void picopi_setup_usb_clocks(void)
+{
+	uint32_t usb_en_bits = (uint32_t)USB_CLK_SELECT;
+
+	imx_clock_set_usb_clk_root_bits(usb_en_bits);
+	imx_clock_enable_usb(CCM_CCGR_ID_USB_IPG);
+	imx_clock_enable_usb(CCM_CCGR_ID_USB_PHY_480MCLK);
+	imx_clock_enable_usb(CCM_CCGR_ID_USB_OTG1_PHY);
+	imx_clock_enable_usb(CCM_CCGR_ID_USB_OTG2_PHY);
+}
+
+void imx7_platform_setup(u_register_t arg1, u_register_t arg2,
+			 u_register_t arg3, u_register_t arg4)
+{
+	uint32_t uart5_en_bits = (uint32_t)UART5_CLK_SELECT;
+	uint32_t usdhc_clock_sel = PLAT_PICOPI_SD - 1;
+
+	/* Initialize clocks etc */
+	imx_clock_enable_uart(4, uart5_en_bits);
+	imx_clock_enable_usdhc(usdhc_clock_sel, USDHC_CLK_SELECT);
+
+	picopi_setup_usb_clocks();
+
+	/* Setup pin-muxes */
+	picopi_setup_pinmux();
+
+	picopi_usdhc_setup();
+}

plat/imx/imx7/picopi/platform.mk

+#
+# Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+# Include imx7 common
+include plat/imx/imx7/common/imx7.mk
+
+# Platform
+PLAT_INCLUDES		+=	-Iplat/imx/imx7/picopi/include		    \
+
+BL2_SOURCES		+=	drivers/imx/usdhc/imx_usdhc.c		    \
+				plat/imx/imx7/picopi/picopi_bl2_el3_setup.c \
+
+# Build config flags
+# ------------------
+
+ARM_CORTEX_A7			:= yes
+WORKAROUND_CVE_2017_5715	:= 0
+
+RESET_TO_BL31			:= 0
+
+# Non-TF Boot ROM
+BL2_AT_EL3			:= 1
+
+# Indicate single-core
+COLD_BOOT_SINGLE_CPU		:= 1
+
+# Have different sections for code and rodata
+SEPARATE_CODE_AND_RODATA	:= 1
+
+# Use Coherent memory
+USE_COHERENT_MEM		:= 1
+
+# Use multi console API
+MULTI_CONSOLE_API		:= 1
+
+PLAT_PICOPI_UART		:=5
+$(eval $(call add_define,PLAT_PICOPI_UART))