diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index e7d7b90e2cf8..ae3b51b4a4fb 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -53,12 +53,6 @@ config IMX_HAVE_IOMUX_V1
 config ARCH_MXC_IOMUX_V3
 	bool
 
-config SOC_IMX21
-	bool
-	select CPU_ARM926T
-	select IMX_HAVE_IOMUX_V1
-	select MXC_AVIC
-
 config SOC_IMX27
 	bool
 	select CPU_ARM926T
@@ -79,19 +73,6 @@ config SOC_IMX35
 
 if ARCH_MULTI_V5
 
-comment "MX21 platforms:"
-
-config MACH_MX21ADS
-	bool "MX21ADS platform"
-	select IMX_HAVE_PLATFORM_IMX_FB
-	select IMX_HAVE_PLATFORM_IMX_UART
-	select IMX_HAVE_PLATFORM_MXC_MMC
-	select IMX_HAVE_PLATFORM_MXC_NAND
-	select SOC_IMX21
-	help
-	  Include support for MX21ADS platform. This includes specific
-	  configurations for the board and its peripherals.
-
 comment "MX27 platforms:"
 
 config MACH_MX27ADS
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index e7364e6c8c6b..d0370af0b1e3 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -1,8 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-y := cpu.o system.o irq-common.o
 
-obj-$(CONFIG_SOC_IMX21) += mm-imx21.o
-
 obj-$(CONFIG_SOC_IMX25) += cpu-imx25.o mach-imx25.o pm-imx25.o
 
 obj-$(CONFIG_SOC_IMX27) += cpu-imx27.o pm-imx27.o
@@ -37,9 +35,6 @@ obj-y += ssi-fiq.o
 obj-y += ssi-fiq-ksym.o
 endif
 
-# i.MX21 based machines
-obj-$(CONFIG_MACH_MX21ADS) += mach-mx21ads.o
-
 # i.MX27 based machines
 obj-$(CONFIG_MACH_MX27ADS) += mach-mx27ads.o
 obj-$(CONFIG_MACH_MX27_3DS) += mach-mx27_3ds.o
diff --git a/arch/arm/mach-imx/devices-imx21.h b/arch/arm/mach-imx/devices-imx21.h
deleted file mode 100644
index 3679d1de84d4..000000000000
--- a/arch/arm/mach-imx/devices-imx21.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (C) 2010 Pengutronix
- * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
- */
-#include "devices/devices-common.h"
-
-extern const struct imx_imx21_hcd_data imx21_imx21_hcd_data;
-#define imx21_add_imx21_hcd(pdata)	\
-	imx_add_imx21_hcd(&imx21_imx21_hcd_data, pdata)
-
-extern const struct imx_imx2_wdt_data imx21_imx2_wdt_data;
-#define imx21_add_imx2_wdt()	\
-	imx_add_imx2_wdt(&imx21_imx2_wdt_data)
-
-extern const struct imx_imx_fb_data imx21_imx_fb_data;
-#define imx21_add_imx_fb(pdata)	\
-	imx_add_imx_fb(&imx21_imx_fb_data, pdata)
-
-extern const struct imx_imx_i2c_data imx21_imx_i2c_data;
-#define imx21_add_imx_i2c(pdata)	\
-	imx_add_imx_i2c(&imx21_imx_i2c_data, pdata)
-
-extern const struct imx_imx_keypad_data imx21_imx_keypad_data;
-#define imx21_add_imx_keypad(pdata)	\
-	imx_add_imx_keypad(&imx21_imx_keypad_data, pdata)
-
-extern const struct imx_imx_ssi_data imx21_imx_ssi_data[];
-#define imx21_add_imx_ssi(id, pdata)	\
-	imx_add_imx_ssi(&imx21_imx_ssi_data[id], pdata)
-
-extern const struct imx_imx_uart_1irq_data imx21_imx_uart_data[];
-#define imx21_add_imx_uart(id, pdata)	\
-	imx_add_imx_uart_1irq(&imx21_imx_uart_data[id], pdata)
-#define imx21_add_imx_uart0(pdata)	imx21_add_imx_uart(0, pdata)
-#define imx21_add_imx_uart1(pdata)	imx21_add_imx_uart(1, pdata)
-#define imx21_add_imx_uart2(pdata)	imx21_add_imx_uart(2, pdata)
-#define imx21_add_imx_uart3(pdata)	imx21_add_imx_uart(3, pdata)
-
-extern const struct imx_mxc_mmc_data imx21_mxc_mmc_data[];
-#define imx21_add_mxc_mmc(id, pdata)	\
-	imx_add_mxc_mmc(&imx21_mxc_mmc_data[id], pdata)
-
-extern const struct imx_mxc_nand_data imx21_mxc_nand_data;
-#define imx21_add_mxc_nand(pdata)	\
-	imx_add_mxc_nand(&imx21_mxc_nand_data, pdata)
-
-extern const struct imx_mxc_w1_data imx21_mxc_w1_data;
-#define imx21_add_mxc_w1()	\
-	imx_add_mxc_w1(&imx21_mxc_w1_data)
-
-extern const struct imx_spi_imx_data imx21_cspi_data[];
-#define imx21_add_cspi(id, pdata)	\
-	imx_add_spi_imx(&imx21_cspi_data[id], pdata)
-#define imx21_add_spi_imx0(pdata)	imx21_add_cspi(0, pdata)
-#define imx21_add_spi_imx1(pdata)	imx21_add_cspi(1, pdata)
diff --git a/arch/arm/mach-imx/mach-mx21ads.c b/arch/arm/mach-imx/mach-mx21ads.c
deleted file mode 100644
index ec011e89eb9e..000000000000
--- a/arch/arm/mach-imx/mach-mx21ads.c
+++ /dev/null
@@ -1,338 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *  Copyright (C) 2000 Deep Blue Solutions Ltd
- *  Copyright (C) 2002 Shane Nay (shane@minirl.com)
- *  Copyright 2006-2007 Freescale Semiconductor, Inc. All Rights Reserved.
- */
-
-#include <linux/platform_device.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/physmap.h>
-#include <linux/gpio/driver.h>
-#include <linux/gpio/machine.h>
-#include <linux/gpio.h>
-#include <linux/regulator/fixed.h>
-#include <linux/regulator/machine.h>
-#include <asm/mach-types.h>
-#include <asm/mach/arch.h>
-
-#include "common.h"
-#include "devices-imx21.h"
-#include "hardware.h"
-#include "iomux-mx21.h"
-
-#define MX21ADS_CS8900A_REG		(MX21_CS1_BASE_ADDR + 0x000000)
-#define MX21ADS_ST16C255_IOBASE_REG	(MX21_CS1_BASE_ADDR + 0x200000)
-#define MX21ADS_VERSION_REG		(MX21_CS1_BASE_ADDR + 0x400000)
-#define MX21ADS_IO_REG			(MX21_CS1_BASE_ADDR + 0x800000)
-
-#define MX21ADS_MMC_CD			IMX_GPIO_NR(4, 25)
-#define MX21ADS_CS8900A_IRQ_GPIO	IMX_GPIO_NR(5, 11)
-#define MX21ADS_MMGPIO_BASE		(6 * 32)
-
-/* MX21ADS_IO_REG bit definitions */
-#define MX21ADS_IO_SD_WP		(MX21ADS_MMGPIO_BASE + 0)
-#define MX21ADS_IO_TP6			(MX21ADS_IO_SD_WP)
-#define MX21ADS_IO_SW_SEL		(MX21ADS_MMGPIO_BASE + 1)
-#define MX21ADS_IO_TP7			(MX21ADS_IO_SW_SEL)
-#define MX21ADS_IO_RESET_E_UART		(MX21ADS_MMGPIO_BASE + 2)
-#define MX21ADS_IO_RESET_BASE		(MX21ADS_MMGPIO_BASE + 3)
-#define MX21ADS_IO_CSI_CTL2		(MX21ADS_MMGPIO_BASE + 4)
-#define MX21ADS_IO_CSI_CTL1		(MX21ADS_MMGPIO_BASE + 5)
-#define MX21ADS_IO_CSI_CTL0		(MX21ADS_MMGPIO_BASE + 6)
-#define MX21ADS_IO_UART1_EN		(MX21ADS_MMGPIO_BASE + 7)
-#define MX21ADS_IO_UART4_EN		(MX21ADS_MMGPIO_BASE + 8)
-#define MX21ADS_IO_LCDON		(MX21ADS_MMGPIO_BASE + 9)
-#define MX21ADS_IO_IRDA_EN		(MX21ADS_MMGPIO_BASE + 10)
-#define MX21ADS_IO_IRDA_FIR_SEL		(MX21ADS_MMGPIO_BASE + 11)
-#define MX21ADS_IO_IRDA_MD0_B		(MX21ADS_MMGPIO_BASE + 12)
-#define MX21ADS_IO_IRDA_MD1		(MX21ADS_MMGPIO_BASE + 13)
-#define MX21ADS_IO_LED4_ON		(MX21ADS_MMGPIO_BASE + 14)
-#define MX21ADS_IO_LED3_ON		(MX21ADS_MMGPIO_BASE + 15)
-
-static const int mx21ads_pins[] __initconst = {
-
-	/* CS8900A */
-	(GPIO_PORTE | GPIO_GPIO | GPIO_IN | 11),
-
-	/* UART1 */
-	PE12_PF_UART1_TXD,
-	PE13_PF_UART1_RXD,
-	PE14_PF_UART1_CTS,
-	PE15_PF_UART1_RTS,
-
-	/* UART3 (IrDA) - only TXD and RXD */
-	PE8_PF_UART3_TXD,
-	PE9_PF_UART3_RXD,
-
-	/* UART4 */
-	PB26_AF_UART4_RTS,
-	PB28_AF_UART4_TXD,
-	PB29_AF_UART4_CTS,
-	PB31_AF_UART4_RXD,
-
-	/* LCDC */
-	PA5_PF_LSCLK,
-	PA6_PF_LD0,
-	PA7_PF_LD1,
-	PA8_PF_LD2,
-	PA9_PF_LD3,
-	PA10_PF_LD4,
-	PA11_PF_LD5,
-	PA12_PF_LD6,
-	PA13_PF_LD7,
-	PA14_PF_LD8,
-	PA15_PF_LD9,
-	PA16_PF_LD10,
-	PA17_PF_LD11,
-	PA18_PF_LD12,
-	PA19_PF_LD13,
-	PA20_PF_LD14,
-	PA21_PF_LD15,
-	PA22_PF_LD16,
-	PA24_PF_REV,     /* Sharp panel dedicated signal */
-	PA25_PF_CLS,     /* Sharp panel dedicated signal */
-	PA26_PF_PS,      /* Sharp panel dedicated signal */
-	PA27_PF_SPL_SPR, /* Sharp panel dedicated signal */
-	PA28_PF_HSYNC,
-	PA29_PF_VSYNC,
-	PA30_PF_CONTRAST,
-	PA31_PF_OE_ACD,
-
-	/* MMC/SDHC */
-	PE18_PF_SD1_D0,
-	PE19_PF_SD1_D1,
-	PE20_PF_SD1_D2,
-	PE21_PF_SD1_D3,
-	PE22_PF_SD1_CMD,
-	PE23_PF_SD1_CLK,
-
-	/* NFC */
-	PF0_PF_NRFB,
-	PF1_PF_NFCE,
-	PF2_PF_NFWP,
-	PF3_PF_NFCLE,
-	PF4_PF_NFALE,
-	PF5_PF_NFRE,
-	PF6_PF_NFWE,
-	PF7_PF_NFIO0,
-	PF8_PF_NFIO1,
-	PF9_PF_NFIO2,
-	PF10_PF_NFIO3,
-	PF11_PF_NFIO4,
-	PF12_PF_NFIO5,
-	PF13_PF_NFIO6,
-	PF14_PF_NFIO7,
-};
-
-/* ADS's NOR flash: 2x AM29BDS128HE9VKI on 32-bit bus */
-static struct physmap_flash_data mx21ads_flash_data = {
-	.width = 4,
-};
-
-static struct resource mx21ads_flash_resource =
-	DEFINE_RES_MEM(MX21_CS0_BASE_ADDR, SZ_32M);
-
-static struct platform_device mx21ads_nor_mtd_device = {
-	.name = "physmap-flash",
-	.id = 0,
-	.dev = {
-		.platform_data = &mx21ads_flash_data,
-	},
-	.num_resources = 1,
-	.resource = &mx21ads_flash_resource,
-};
-
-static struct resource mx21ads_cs8900_resources[] __initdata = {
-	DEFINE_RES_MEM(MX21ADS_CS8900A_REG, SZ_1K),
-	/* irq number is run-time assigned */
-	DEFINE_RES_IRQ(-1),
-};
-
-static const struct platform_device_info mx21ads_cs8900_devinfo __initconst = {
-	.name = "cs89x0",
-	.id = 0,
-	.res = mx21ads_cs8900_resources,
-	.num_res = ARRAY_SIZE(mx21ads_cs8900_resources),
-};
-
-static const struct imxuart_platform_data uart_pdata_rts __initconst = {
-	.flags = IMXUART_HAVE_RTSCTS,
-};
-
-static const struct imxuart_platform_data uart_pdata_norts __initconst = {
-};
-
-static struct resource mx21ads_mmgpio_resource =
-	DEFINE_RES_MEM_NAMED(MX21ADS_IO_REG, SZ_2, "dat");
-
-static struct bgpio_pdata mx21ads_mmgpio_pdata = {
-	.label	= "mx21ads-mmgpio",
-	.base	= MX21ADS_MMGPIO_BASE,
-	.ngpio	= 16,
-};
-
-static struct platform_device mx21ads_mmgpio = {
-	.name = "basic-mmio-gpio",
-	.id = PLATFORM_DEVID_AUTO,
-	.resource = &mx21ads_mmgpio_resource,
-	.num_resources = 1,
-	.dev = {
-		.platform_data = &mx21ads_mmgpio_pdata,
-	},
-};
-
-static struct regulator_consumer_supply mx21ads_lcd_regulator_consumer =
-	REGULATOR_SUPPLY("lcd", "imx-fb.0");
-
-static struct regulator_init_data mx21ads_lcd_regulator_init_data = {
-	.constraints = {
-		.valid_ops_mask	= REGULATOR_CHANGE_STATUS,
-	},
-	.consumer_supplies	= &mx21ads_lcd_regulator_consumer,
-	.num_consumer_supplies	= 1,
-};
-
-static struct fixed_voltage_config mx21ads_lcd_regulator_pdata = {
-	.supply_name	= "LCD",
-	.microvolts	= 3300000,
-	.init_data	= &mx21ads_lcd_regulator_init_data,
-};
-
-static struct platform_device mx21ads_lcd_regulator = {
-	.name = "reg-fixed-voltage",
-	.id = PLATFORM_DEVID_AUTO,
-	.dev = {
-		.platform_data = &mx21ads_lcd_regulator_pdata,
-	},
-};
-
-static struct gpiod_lookup_table mx21ads_lcd_regulator_gpiod_table = {
-	.dev_id = "reg-fixed-voltage.0", /* Let's hope ID 0 is what we get */
-	.table = {
-		GPIO_LOOKUP("mx21ads-mmgpio", 9, NULL, GPIO_ACTIVE_HIGH),
-		{ },
-	},
-};
-
-/*
- * Connected is a portrait Sharp-QVGA display
- * of type: LQ035Q7DB02
- */
-static struct imx_fb_videomode mx21ads_modes[] = {
-	{
-		.mode = {
-			.name		= "Sharp-LQ035Q7",
-			.refresh	= 60,
-			.xres		= 240,
-			.yres		= 320,
-			.pixclock	= 188679, /* in ps (5.3MHz) */
-			.hsync_len	= 2,
-			.left_margin	= 6,
-			.right_margin	= 16,
-			.vsync_len	= 1,
-			.upper_margin	= 8,
-			.lower_margin	= 10,
-		},
-		.pcr		= 0xfb108bc7,
-		.bpp		= 16,
-	},
-};
-
-static const struct imx_fb_platform_data mx21ads_fb_data __initconst = {
-	.mode = mx21ads_modes,
-	.num_modes = ARRAY_SIZE(mx21ads_modes),
-
-	.pwmr		= 0x00a903ff,
-	.lscr1		= 0x00120300,
-	.dmacr		= 0x00020008,
-};
-
-static int mx21ads_sdhc_get_ro(struct device *dev)
-{
-	return gpio_get_value(MX21ADS_IO_SD_WP);
-}
-
-static int mx21ads_sdhc_init(struct device *dev, irq_handler_t detect_irq,
-	void *data)
-{
-	int ret;
-
-	ret = gpio_request(MX21ADS_IO_SD_WP, "mmc-ro");
-	if (ret)
-		return ret;
-
-	return request_irq(gpio_to_irq(MX21ADS_MMC_CD), detect_irq,
-			   IRQF_TRIGGER_FALLING, "mmc-detect", data);
-}
-
-static void mx21ads_sdhc_exit(struct device *dev, void *data)
-{
-	free_irq(gpio_to_irq(MX21ADS_MMC_CD), data);
-	gpio_free(MX21ADS_IO_SD_WP);
-}
-
-static const struct imxmmc_platform_data mx21ads_sdhc_pdata __initconst = {
-	.ocr_avail = MMC_VDD_29_30 | MMC_VDD_30_31, /* 3.0V */
-	.get_ro = mx21ads_sdhc_get_ro,
-	.init = mx21ads_sdhc_init,
-	.exit = mx21ads_sdhc_exit,
-};
-
-static const struct mxc_nand_platform_data
-mx21ads_nand_board_info __initconst = {
-	.width = 1,
-	.hw_ecc = 1,
-};
-
-static struct platform_device *platform_devices[] __initdata = {
-	&mx21ads_mmgpio,
-	&mx21ads_lcd_regulator,
-	&mx21ads_nor_mtd_device,
-};
-
-static void __init mx21ads_board_init(void)
-{
-	imx21_soc_init();
-
-	mxc_gpio_setup_multiple_pins(mx21ads_pins, ARRAY_SIZE(mx21ads_pins),
-			"mx21ads");
-
-	imx21_add_imx_uart0(&uart_pdata_rts);
-	imx21_add_imx_uart2(&uart_pdata_norts);
-	imx21_add_imx_uart3(&uart_pdata_rts);
-	imx21_add_mxc_nand(&mx21ads_nand_board_info);
-
-	imx21_add_imx_fb(&mx21ads_fb_data);
-}
-
-static void __init mx21ads_late_init(void)
-{
-	imx21_add_mxc_mmc(0, &mx21ads_sdhc_pdata);
-
-	gpiod_add_lookup_table(&mx21ads_lcd_regulator_gpiod_table);
-	platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
-
-	mx21ads_cs8900_resources[1].start =
-			gpio_to_irq(MX21ADS_CS8900A_IRQ_GPIO);
-	mx21ads_cs8900_resources[1].end =
-			gpio_to_irq(MX21ADS_CS8900A_IRQ_GPIO);
-	platform_device_register_full(&mx21ads_cs8900_devinfo);
-}
-
-static void __init mx21ads_timer_init(void)
-{
-	mx21_clocks_init(32768, 26000000);
-}
-
-MACHINE_START(MX21ADS, "Freescale i.MX21ADS")
-	/* maintainer: Freescale Semiconductor, Inc. */
-	.atag_offset = 0x100,
-	.map_io		= mx21_map_io,
-	.init_early = imx21_init_early,
-	.init_irq = mx21_init_irq,
-	.init_time	= mx21ads_timer_init,
-	.init_machine	= mx21ads_board_init,
-	.init_late	= mx21ads_late_init,
-	.restart	= mxc_restart,
-MACHINE_END
diff --git a/arch/arm/mach-imx/mm-imx21.c b/arch/arm/mach-imx/mm-imx21.c
deleted file mode 100644
index b834026e4615..000000000000
--- a/arch/arm/mach-imx/mm-imx21.c
+++ /dev/null
@@ -1,84 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * arch/arm/mach-imx/mm-imx21.c
- *
- * Copyright (C) 2008 Juergen Beisert (kernel@pengutronix.de)
- */
-
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/pinctrl/machine.h>
-#include <asm/mach/map.h>
-
-#include "common.h"
-#include "devices/devices-common.h"
-#include "hardware.h"
-#include "iomux-v1.h"
-
-/* MX21 memory map definition */
-static struct map_desc imx21_io_desc[] __initdata = {
-	/*
-	 * this fixed mapping covers:
-	 * - AIPI1
-	 * - AIPI2
-	 * - AITC
-	 * - ROM Patch
-	 * - and some reserved space
-	 */
-	imx_map_entry(MX21, AIPI, MT_DEVICE),
-	/*
-	 * this fixed mapping covers:
-	 * - CSI
-	 * - ATA
-	 */
-	imx_map_entry(MX21, SAHB1, MT_DEVICE),
-	/*
-	 * this fixed mapping covers:
-	 * - EMI
-	 */
-	imx_map_entry(MX21, X_MEMC, MT_DEVICE),
-};
-
-/*
- * Initialize the memory map. It is called during the
- * system startup to create static physical to virtual
- * memory map for the IO modules.
- */
-void __init mx21_map_io(void)
-{
-	iotable_init(imx21_io_desc, ARRAY_SIZE(imx21_io_desc));
-}
-
-void __init imx21_init_early(void)
-{
-	mxc_set_cpu_type(MXC_CPU_MX21);
-	imx_iomuxv1_init(MX21_IO_ADDRESS(MX21_GPIO_BASE_ADDR),
-			MX21_NUM_GPIO_PORT);
-}
-
-void __init mx21_init_irq(void)
-{
-	mxc_init_irq(MX21_IO_ADDRESS(MX21_AVIC_BASE_ADDR));
-}
-
-static const struct resource imx21_audmux_res[] __initconst = {
-	DEFINE_RES_MEM(MX21_AUDMUX_BASE_ADDR, SZ_4K),
-};
-
-void __init imx21_soc_init(void)
-{
-	mxc_arch_reset_init(MX21_IO_ADDRESS(MX21_WDOG_BASE_ADDR));
-	mxc_device_init();
-
-	mxc_register_gpio("imx21-gpio", 0, MX21_GPIO1_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
-	mxc_register_gpio("imx21-gpio", 1, MX21_GPIO2_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
-	mxc_register_gpio("imx21-gpio", 2, MX21_GPIO3_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
-	mxc_register_gpio("imx21-gpio", 3, MX21_GPIO4_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
-	mxc_register_gpio("imx21-gpio", 4, MX21_GPIO5_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
-	mxc_register_gpio("imx21-gpio", 5, MX21_GPIO6_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
-
-	pinctrl_provide_dummies();
-	imx_add_imx_dma("imx21-dma", MX21_DMA_BASE_ADDR, MX21_INT_DMACH0);
-	platform_device_register_simple("imx21-audmux", 0, imx21_audmux_res,
-					ARRAY_SIZE(imx21_audmux_res));
-}
