Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

10 files changed, 2105 insertions, 0 deletions

diff --git a/arch/mips/ar7/Makefile b/arch/mips/ar7/Makefile
new file mode 100644
index 000000000..cd51c6c6e
--- /dev/null
+++ b/arch/mips/ar7/Makefile
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-y := \
+	prom.o \
+	setup.o \
+	memory.o \
+	irq.o \
+	time.o \
+	platform.o \
+	gpio.o \
+	clock.o
diff --git a/arch/mips/ar7/Platform b/arch/mips/ar7/Platform
new file mode 100644
index 000000000..a9257cc01
--- /dev/null
+++ b/arch/mips/ar7/Platform
@@ -0,0 +1,5 @@
+#
+# Texas Instruments AR7
+#
+cflags-$(CONFIG_AR7)		+= -I$(srctree)/arch/mips/include/asm/mach-ar7
+load-$(CONFIG_AR7)		+= 0xffffffff94100000
diff --git a/arch/mips/ar7/clock.c b/arch/mips/ar7/clock.c
new file mode 100644
index 000000000..c717acbc5
--- /dev/null
+++ b/arch/mips/ar7/clock.c
@@ -0,0 +1,439 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2007 Eugene Konev <ejka@openwrt.org>
+ * Copyright (C) 2009 Florian Fainelli <florian@openwrt.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/export.h>
+#include <linux/delay.h>
+#include <linux/gcd.h>
+#include <linux/io.h>
+#include <linux/err.h>
+#include <linux/clkdev.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+
+#include <asm/addrspace.h>
+#include <asm/mach-ar7/ar7.h>
+
+#define BOOT_PLL_SOURCE_MASK	0x3
+#define CPU_PLL_SOURCE_SHIFT	16
+#define BUS_PLL_SOURCE_SHIFT	14
+#define USB_PLL_SOURCE_SHIFT	18
+#define DSP_PLL_SOURCE_SHIFT	22
+#define BOOT_PLL_SOURCE_AFE	0
+#define BOOT_PLL_SOURCE_BUS	0
+#define BOOT_PLL_SOURCE_REF	1
+#define BOOT_PLL_SOURCE_XTAL	2
+#define BOOT_PLL_SOURCE_CPU	3
+#define BOOT_PLL_BYPASS		0x00000020
+#define BOOT_PLL_ASYNC_MODE	0x02000000
+#define BOOT_PLL_2TO1_MODE	0x00008000
+
+#define TNETD7200_CLOCK_ID_CPU	0
+#define TNETD7200_CLOCK_ID_DSP	1
+#define TNETD7200_CLOCK_ID_USB	2
+
+#define TNETD7200_DEF_CPU_CLK	211000000
+#define TNETD7200_DEF_DSP_CLK	125000000
+#define TNETD7200_DEF_USB_CLK	48000000
+
+struct tnetd7300_clock {
+	u32 ctrl;
+#define PREDIV_MASK	0x001f0000
+#define PREDIV_SHIFT	16
+#define POSTDIV_MASK	0x0000001f
+	u32 unused1[3];
+	u32 pll;
+#define MUL_MASK	0x0000f000
+#define MUL_SHIFT	12
+#define PLL_MODE_MASK	0x00000001
+#define PLL_NDIV	0x00000800
+#define PLL_DIV		0x00000002
+#define PLL_STATUS	0x00000001
+	u32 unused2[3];
+};
+
+struct tnetd7300_clocks {
+	struct tnetd7300_clock bus;
+	struct tnetd7300_clock cpu;
+	struct tnetd7300_clock usb;
+	struct tnetd7300_clock dsp;
+};
+
+struct tnetd7200_clock {
+	u32 ctrl;
+	u32 unused1[3];
+#define DIVISOR_ENABLE_MASK 0x00008000
+	u32 mul;
+	u32 prediv;
+	u32 postdiv;
+	u32 postdiv2;
+	u32 unused2[6];
+	u32 cmd;
+	u32 status;
+	u32 cmden;
+	u32 padding[15];
+};
+
+struct tnetd7200_clocks {
+	struct tnetd7200_clock cpu;
+	struct tnetd7200_clock dsp;
+	struct tnetd7200_clock usb;
+};
+
+struct clk_rate {
+	u32 rate;
+};
+static struct clk_rate bus_clk = {
+	.rate	= 125000000,
+};
+
+static struct clk_rate cpu_clk = {
+	.rate	= 150000000,
+};
+
+static void approximate(int base, int target, int *prediv,
+			int *postdiv, int *mul)
+{
+	int i, j, k, freq, res = target;
+	for (i = 1; i <= 16; i++)
+		for (j = 1; j <= 32; j++)
+			for (k = 1; k <= 32; k++) {
+				freq = abs(base / j * i / k - target);
+				if (freq < res) {
+					res = freq;
+					*mul = i;
+					*prediv = j;
+					*postdiv = k;
+				}
+			}
+}
+
+static void calculate(int base, int target, int *prediv, int *postdiv,
+	int *mul)
+{
+	int tmp_gcd, tmp_base, tmp_freq;
+
+	for (*prediv = 1; *prediv <= 32; (*prediv)++) {
+		tmp_base = base / *prediv;
+		tmp_gcd = gcd(target, tmp_base);
+		*mul = target / tmp_gcd;
+		*postdiv = tmp_base / tmp_gcd;
+		if ((*mul < 1) || (*mul >= 16))
+			continue;
+		if ((*postdiv > 0) & (*postdiv <= 32))
+			break;
+	}
+
+	if (base / *prediv * *mul / *postdiv != target) {
+		approximate(base, target, prediv, postdiv, mul);
+		tmp_freq = base / *prediv * *mul / *postdiv;
+		printk(KERN_WARNING
+		       "Adjusted requested frequency %d to %d\n",
+		       target, tmp_freq);
+	}
+
+	printk(KERN_DEBUG "Clocks: prediv: %d, postdiv: %d, mul: %d\n",
+	       *prediv, *postdiv, *mul);
+}
+
+static int tnetd7300_dsp_clock(void)
+{
+	u32 didr1, didr2;
+	u8 rev = ar7_chip_rev();
+	didr1 = readl((void *)KSEG1ADDR(AR7_REGS_GPIO + 0x18));
+	didr2 = readl((void *)KSEG1ADDR(AR7_REGS_GPIO + 0x1c));
+	if (didr2 & (1 << 23))
+		return 0;
+	if ((rev >= 0x23) && (rev != 0x57))
+		return 250000000;
+	if ((((didr2 & 0x1fff) << 10) | ((didr1 & 0xffc00000) >> 22))
+	    > 4208000)
+		return 250000000;
+	return 0;
+}
+
+static int tnetd7300_get_clock(u32 shift, struct tnetd7300_clock *clock,
+	u32 *bootcr, u32 bus_clock)
+{
+	int product;
+	int base_clock = AR7_REF_CLOCK;
+	u32 ctrl = readl(&clock->ctrl);
+	u32 pll = readl(&clock->pll);
+	int prediv = ((ctrl & PREDIV_MASK) >> PREDIV_SHIFT) + 1;
+	int postdiv = (ctrl & POSTDIV_MASK) + 1;
+	int divisor = prediv * postdiv;
+	int mul = ((pll & MUL_MASK) >> MUL_SHIFT) + 1;
+
+	switch ((*bootcr & (BOOT_PLL_SOURCE_MASK << shift)) >> shift) {
+	case BOOT_PLL_SOURCE_BUS:
+		base_clock = bus_clock;
+		break;
+	case BOOT_PLL_SOURCE_REF:
+		base_clock = AR7_REF_CLOCK;
+		break;
+	case BOOT_PLL_SOURCE_XTAL:
+		base_clock = AR7_XTAL_CLOCK;
+		break;
+	case BOOT_PLL_SOURCE_CPU:
+		base_clock = cpu_clk.rate;
+		break;
+	}
+
+	if (*bootcr & BOOT_PLL_BYPASS)
+		return base_clock / divisor;
+
+	if ((pll & PLL_MODE_MASK) == 0)
+		return (base_clock >> (mul / 16 + 1)) / divisor;
+
+	if ((pll & (PLL_NDIV | PLL_DIV)) == (PLL_NDIV | PLL_DIV)) {
+		product = (mul & 1) ?
+			(base_clock * mul) >> 1 :
+			(base_clock * (mul - 1)) >> 2;
+		return product / divisor;
+	}
+
+	if (mul == 16)
+		return base_clock / divisor;
+
+	return base_clock * mul / divisor;
+}
+
+static void tnetd7300_set_clock(u32 shift, struct tnetd7300_clock *clock,
+	u32 *bootcr, u32 frequency)
+{
+	int prediv, postdiv, mul;
+	int base_clock = bus_clk.rate;
+
+	switch ((*bootcr & (BOOT_PLL_SOURCE_MASK << shift)) >> shift) {
+	case BOOT_PLL_SOURCE_BUS:
+		base_clock = bus_clk.rate;
+		break;
+	case BOOT_PLL_SOURCE_REF:
+		base_clock = AR7_REF_CLOCK;
+		break;
+	case BOOT_PLL_SOURCE_XTAL:
+		base_clock = AR7_XTAL_CLOCK;
+		break;
+	case BOOT_PLL_SOURCE_CPU:
+		base_clock = cpu_clk.rate;
+		break;
+	}
+
+	calculate(base_clock, frequency, &prediv, &postdiv, &mul);
+
+	writel(((prediv - 1) << PREDIV_SHIFT) | (postdiv - 1), &clock->ctrl);
+	mdelay(1);
+	writel(4, &clock->pll);
+	while (readl(&clock->pll) & PLL_STATUS)
+		;
+	writel(((mul - 1) << MUL_SHIFT) | (0xff << 3) | 0x0e, &clock->pll);
+	mdelay(75);
+}
+
+static void __init tnetd7300_init_clocks(void)
+{
+	u32 *bootcr = (u32 *)ioremap(AR7_REGS_DCL, 4);
+	struct tnetd7300_clocks *clocks =
+					ioremap(UR8_REGS_CLOCKS,
+					sizeof(struct tnetd7300_clocks));
+	u32 dsp_clk;
+	struct clk *clk;
+
+	bus_clk.rate = tnetd7300_get_clock(BUS_PLL_SOURCE_SHIFT,
+		&clocks->bus, bootcr, AR7_AFE_CLOCK);
+
+	if (*bootcr & BOOT_PLL_ASYNC_MODE)
+		cpu_clk.rate = tnetd7300_get_clock(CPU_PLL_SOURCE_SHIFT,
+			&clocks->cpu, bootcr, AR7_AFE_CLOCK);
+	else
+		cpu_clk.rate = bus_clk.rate;
+
+	dsp_clk = tnetd7300_dsp_clock();
+	if (dsp_clk == 250000000)
+		tnetd7300_set_clock(DSP_PLL_SOURCE_SHIFT, &clocks->dsp,
+			bootcr, dsp_clk);
+
+	iounmap(clocks);
+	iounmap(bootcr);
+
+	clk = clk_register_fixed_rate(NULL, "cpu", NULL, 0, cpu_clk.rate);
+	clkdev_create(clk, "cpu", NULL);
+	clk = clk_register_fixed_rate(NULL, "dsp", NULL, 0, dsp_clk);
+	clkdev_create(clk, "dsp", NULL);
+}
+
+static void tnetd7200_set_clock(int base, struct tnetd7200_clock *clock,
+	int prediv, int postdiv, int postdiv2, int mul, u32 frequency)
+{
+	printk(KERN_INFO
+		"Clocks: base = %d, frequency = %u, prediv = %d, "
+		"postdiv = %d, postdiv2 = %d, mul = %d\n",
+		base, frequency, prediv, postdiv, postdiv2, mul);
+
+	writel(0, &clock->ctrl);
+	writel(DIVISOR_ENABLE_MASK | ((prediv - 1) & 0x1F), &clock->prediv);
+	writel((mul - 1) & 0xF, &clock->mul);
+
+	while (readl(&clock->status) & 0x1)
+		; /* nop */
+
+	writel(DIVISOR_ENABLE_MASK | ((postdiv - 1) & 0x1F), &clock->postdiv);
+
+	writel(readl(&clock->cmden) | 1, &clock->cmden);
+	writel(readl(&clock->cmd) | 1, &clock->cmd);
+
+	while (readl(&clock->status) & 0x1)
+		; /* nop */
+
+	writel(DIVISOR_ENABLE_MASK | ((postdiv2 - 1) & 0x1F), &clock->postdiv2);
+
+	writel(readl(&clock->cmden) | 1, &clock->cmden);
+	writel(readl(&clock->cmd) | 1, &clock->cmd);
+
+	while (readl(&clock->status) & 0x1)
+		; /* nop */
+
+	writel(readl(&clock->ctrl) | 1, &clock->ctrl);
+}
+
+static int tnetd7200_get_clock_base(int clock_id, u32 *bootcr)
+{
+	if (*bootcr & BOOT_PLL_ASYNC_MODE)
+		/* Async */
+		switch (clock_id) {
+		case TNETD7200_CLOCK_ID_DSP:
+			return AR7_REF_CLOCK;
+		default:
+			return AR7_AFE_CLOCK;
+		}
+	else
+		/* Sync */
+		if (*bootcr & BOOT_PLL_2TO1_MODE)
+			/* 2:1 */
+			switch (clock_id) {
+			case TNETD7200_CLOCK_ID_DSP:
+				return AR7_REF_CLOCK;
+			default:
+				return AR7_AFE_CLOCK;
+			}
+		else
+			/* 1:1 */
+			return AR7_REF_CLOCK;
+}
+
+
+static void __init tnetd7200_init_clocks(void)
+{
+	u32 *bootcr = (u32 *)ioremap(AR7_REGS_DCL, 4);
+	struct tnetd7200_clocks *clocks =
+					ioremap(AR7_REGS_CLOCKS,
+					sizeof(struct tnetd7200_clocks));
+	int cpu_base, cpu_mul, cpu_prediv, cpu_postdiv;
+	int dsp_base, dsp_mul, dsp_prediv, dsp_postdiv;
+	int usb_base, usb_mul, usb_prediv, usb_postdiv;
+	struct clk *clk;
+
+	cpu_base = tnetd7200_get_clock_base(TNETD7200_CLOCK_ID_CPU, bootcr);
+	dsp_base = tnetd7200_get_clock_base(TNETD7200_CLOCK_ID_DSP, bootcr);
+
+	if (*bootcr & BOOT_PLL_ASYNC_MODE) {
+		printk(KERN_INFO "Clocks: Async mode\n");
+
+		printk(KERN_INFO "Clocks: Setting DSP clock\n");
+		calculate(dsp_base, TNETD7200_DEF_DSP_CLK,
+			&dsp_prediv, &dsp_postdiv, &dsp_mul);
+		bus_clk.rate =
+			((dsp_base / dsp_prediv) * dsp_mul) / dsp_postdiv;
+		tnetd7200_set_clock(dsp_base, &clocks->dsp,
+			dsp_prediv, dsp_postdiv * 2, dsp_postdiv, dsp_mul * 2,
+			bus_clk.rate);
+
+		printk(KERN_INFO "Clocks: Setting CPU clock\n");
+		calculate(cpu_base, TNETD7200_DEF_CPU_CLK, &cpu_prediv,
+			&cpu_postdiv, &cpu_mul);
+		cpu_clk.rate =
+			((cpu_base / cpu_prediv) * cpu_mul) / cpu_postdiv;
+		tnetd7200_set_clock(cpu_base, &clocks->cpu,
+			cpu_prediv, cpu_postdiv, -1, cpu_mul,
+			cpu_clk.rate);
+
+	} else
+		if (*bootcr & BOOT_PLL_2TO1_MODE) {
+			printk(KERN_INFO "Clocks: Sync 2:1 mode\n");
+
+			printk(KERN_INFO "Clocks: Setting CPU clock\n");
+			calculate(cpu_base, TNETD7200_DEF_CPU_CLK, &cpu_prediv,
+				&cpu_postdiv, &cpu_mul);
+			cpu_clk.rate = ((cpu_base / cpu_prediv) * cpu_mul)
+								/ cpu_postdiv;
+			tnetd7200_set_clock(cpu_base, &clocks->cpu,
+				cpu_prediv, cpu_postdiv, -1, cpu_mul,
+				cpu_clk.rate);
+
+			printk(KERN_INFO "Clocks: Setting DSP clock\n");
+			calculate(dsp_base, TNETD7200_DEF_DSP_CLK, &dsp_prediv,
+				&dsp_postdiv, &dsp_mul);
+			bus_clk.rate = cpu_clk.rate / 2;
+			tnetd7200_set_clock(dsp_base, &clocks->dsp,
+				dsp_prediv, dsp_postdiv * 2, dsp_postdiv,
+				dsp_mul * 2, bus_clk.rate);
+		} else {
+			printk(KERN_INFO "Clocks: Sync 1:1 mode\n");
+
+			printk(KERN_INFO "Clocks: Setting DSP clock\n");
+			calculate(dsp_base, TNETD7200_DEF_DSP_CLK, &dsp_prediv,
+				&dsp_postdiv, &dsp_mul);
+			bus_clk.rate = ((dsp_base / dsp_prediv) * dsp_mul)
+								/ dsp_postdiv;
+			tnetd7200_set_clock(dsp_base, &clocks->dsp,
+				dsp_prediv, dsp_postdiv * 2, dsp_postdiv,
+				dsp_mul * 2, bus_clk.rate);
+
+			cpu_clk.rate = bus_clk.rate;
+		}
+
+	printk(KERN_INFO "Clocks: Setting USB clock\n");
+	usb_base = bus_clk.rate;
+	calculate(usb_base, TNETD7200_DEF_USB_CLK, &usb_prediv,
+		&usb_postdiv, &usb_mul);
+	tnetd7200_set_clock(usb_base, &clocks->usb,
+		usb_prediv, usb_postdiv, -1, usb_mul,
+		TNETD7200_DEF_USB_CLK);
+
+	iounmap(clocks);
+	iounmap(bootcr);
+
+	clk = clk_register_fixed_rate(NULL, "cpu", NULL, 0, cpu_clk.rate);
+	clkdev_create(clk, "cpu", NULL);
+	clkdev_create(clk, "dsp", NULL);
+}
+
+void __init ar7_init_clocks(void)
+{
+	struct clk *clk;
+
+	switch (ar7_chip_id()) {
+	case AR7_CHIP_7100:
+	case AR7_CHIP_7200:
+		tnetd7200_init_clocks();
+		break;
+	case AR7_CHIP_7300:
+		tnetd7300_init_clocks();
+		break;
+	default:
+		break;
+	}
+	clk = clk_register_fixed_rate(NULL, "bus", NULL, 0, bus_clk.rate);
+	clkdev_create(clk, "bus", NULL);
+	/* adjust vbus clock rate */
+	clk = clk_register_fixed_factor(NULL, "vbus", "bus", 0, 1, 2);
+	clkdev_create(clk, "vbus", NULL);
+	clkdev_create(clk, "cpmac", "cpmac.1");
+	clkdev_create(clk, "cpmac", "cpmac.1");
+}
diff --git a/arch/mips/ar7/gpio.c b/arch/mips/ar7/gpio.c
new file mode 100644
index 000000000..ae0e01b94
--- /dev/null
+++ b/arch/mips/ar7/gpio.c
@@ -0,0 +1,332 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2007 Eugene Konev <ejka@openwrt.org>
+ * Copyright (C) 2009-2010 Florian Fainelli <florian@openwrt.org>
+ */
+
+#include <linux/init.h>
+#include <linux/export.h>
+#include <linux/gpio.h>
+
+#include <asm/mach-ar7/ar7.h>
+
+#define AR7_GPIO_MAX 32
+#define TITAN_GPIO_MAX 51
+
+struct ar7_gpio_chip {
+	void __iomem		*regs;
+	struct gpio_chip	chip;
+};
+
+static int ar7_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
+{
+	struct ar7_gpio_chip *gpch = gpiochip_get_data(chip);
+	void __iomem *gpio_in = gpch->regs + AR7_GPIO_INPUT;
+
+	return !!(readl(gpio_in) & (1 << gpio));
+}
+
+static int titan_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
+{
+	struct ar7_gpio_chip *gpch = gpiochip_get_data(chip);
+	void __iomem *gpio_in0 = gpch->regs + TITAN_GPIO_INPUT_0;
+	void __iomem *gpio_in1 = gpch->regs + TITAN_GPIO_INPUT_1;
+
+	return readl(gpio >> 5 ? gpio_in1 : gpio_in0) & (1 << (gpio & 0x1f));
+}
+
+static void ar7_gpio_set_value(struct gpio_chip *chip,
+				unsigned gpio, int value)
+{
+	struct ar7_gpio_chip *gpch = gpiochip_get_data(chip);
+	void __iomem *gpio_out = gpch->regs + AR7_GPIO_OUTPUT;
+	unsigned tmp;
+
+	tmp = readl(gpio_out) & ~(1 << gpio);
+	if (value)
+		tmp |= 1 << gpio;
+	writel(tmp, gpio_out);
+}
+
+static void titan_gpio_set_value(struct gpio_chip *chip,
+				unsigned gpio, int value)
+{
+	struct ar7_gpio_chip *gpch = gpiochip_get_data(chip);
+	void __iomem *gpio_out0 = gpch->regs + TITAN_GPIO_OUTPUT_0;
+	void __iomem *gpio_out1 = gpch->regs + TITAN_GPIO_OUTPUT_1;
+	unsigned tmp;
+
+	tmp = readl(gpio >> 5 ? gpio_out1 : gpio_out0) & ~(1 << (gpio & 0x1f));
+	if (value)
+		tmp |= 1 << (gpio & 0x1f);
+	writel(tmp, gpio >> 5 ? gpio_out1 : gpio_out0);
+}
+
+static int ar7_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
+{
+	struct ar7_gpio_chip *gpch = gpiochip_get_data(chip);
+	void __iomem *gpio_dir = gpch->regs + AR7_GPIO_DIR;
+
+	writel(readl(gpio_dir) | (1 << gpio), gpio_dir);
+
+	return 0;
+}
+
+static int titan_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
+{
+	struct ar7_gpio_chip *gpch = gpiochip_get_data(chip);
+	void __iomem *gpio_dir0 = gpch->regs + TITAN_GPIO_DIR_0;
+	void __iomem *gpio_dir1 = gpch->regs + TITAN_GPIO_DIR_1;
+
+	if (gpio >= TITAN_GPIO_MAX)
+		return -EINVAL;
+
+	writel(readl(gpio >> 5 ? gpio_dir1 : gpio_dir0) | (1 << (gpio & 0x1f)),
+			gpio >> 5 ? gpio_dir1 : gpio_dir0);
+	return 0;
+}
+
+static int ar7_gpio_direction_output(struct gpio_chip *chip,
+					unsigned gpio, int value)
+{
+	struct ar7_gpio_chip *gpch = gpiochip_get_data(chip);
+	void __iomem *gpio_dir = gpch->regs + AR7_GPIO_DIR;
+
+	ar7_gpio_set_value(chip, gpio, value);
+	writel(readl(gpio_dir) & ~(1 << gpio), gpio_dir);
+
+	return 0;
+}
+
+static int titan_gpio_direction_output(struct gpio_chip *chip,
+					unsigned gpio, int value)
+{
+	struct ar7_gpio_chip *gpch = gpiochip_get_data(chip);
+	void __iomem *gpio_dir0 = gpch->regs + TITAN_GPIO_DIR_0;
+	void __iomem *gpio_dir1 = gpch->regs + TITAN_GPIO_DIR_1;
+
+	if (gpio >= TITAN_GPIO_MAX)
+		return -EINVAL;
+
+	titan_gpio_set_value(chip, gpio, value);
+	writel(readl(gpio >> 5 ? gpio_dir1 : gpio_dir0) & ~(1 <<
+		(gpio & 0x1f)), gpio >> 5 ? gpio_dir1 : gpio_dir0);
+
+	return 0;
+}
+
+static struct ar7_gpio_chip ar7_gpio_chip = {
+	.chip = {
+		.label			= "ar7-gpio",
+		.direction_input	= ar7_gpio_direction_input,
+		.direction_output	= ar7_gpio_direction_output,
+		.set			= ar7_gpio_set_value,
+		.get			= ar7_gpio_get_value,
+		.base			= 0,
+		.ngpio			= AR7_GPIO_MAX,
+	}
+};
+
+static struct ar7_gpio_chip titan_gpio_chip = {
+	.chip = {
+		.label			= "titan-gpio",
+		.direction_input	= titan_gpio_direction_input,
+		.direction_output	= titan_gpio_direction_output,
+		.set			= titan_gpio_set_value,
+		.get			= titan_gpio_get_value,
+		.base			= 0,
+		.ngpio			= TITAN_GPIO_MAX,
+	}
+};
+
+static inline int ar7_gpio_enable_ar7(unsigned gpio)
+{
+	void __iomem *gpio_en = ar7_gpio_chip.regs + AR7_GPIO_ENABLE;
+
+	writel(readl(gpio_en) | (1 << gpio), gpio_en);
+
+	return 0;
+}
+
+static inline int ar7_gpio_enable_titan(unsigned gpio)
+{
+	void __iomem *gpio_en0 = titan_gpio_chip.regs  + TITAN_GPIO_ENBL_0;
+	void __iomem *gpio_en1 = titan_gpio_chip.regs  + TITAN_GPIO_ENBL_1;
+
+	writel(readl(gpio >> 5 ? gpio_en1 : gpio_en0) | (1 << (gpio & 0x1f)),
+		gpio >> 5 ? gpio_en1 : gpio_en0);
+
+	return 0;
+}
+
+int ar7_gpio_enable(unsigned gpio)
+{
+	return ar7_is_titan() ? ar7_gpio_enable_titan(gpio) :
+				ar7_gpio_enable_ar7(gpio);
+}
+EXPORT_SYMBOL(ar7_gpio_enable);
+
+static inline int ar7_gpio_disable_ar7(unsigned gpio)
+{
+	void __iomem *gpio_en = ar7_gpio_chip.regs + AR7_GPIO_ENABLE;
+
+	writel(readl(gpio_en) & ~(1 << gpio), gpio_en);
+
+	return 0;
+}
+
+static inline int ar7_gpio_disable_titan(unsigned gpio)
+{
+	void __iomem *gpio_en0 = titan_gpio_chip.regs + TITAN_GPIO_ENBL_0;
+	void __iomem *gpio_en1 = titan_gpio_chip.regs + TITAN_GPIO_ENBL_1;
+
+	writel(readl(gpio >> 5 ? gpio_en1 : gpio_en0) & ~(1 << (gpio & 0x1f)),
+			gpio >> 5 ? gpio_en1 : gpio_en0);
+
+	return 0;
+}
+
+int ar7_gpio_disable(unsigned gpio)
+{
+	return ar7_is_titan() ? ar7_gpio_disable_titan(gpio) :
+				ar7_gpio_disable_ar7(gpio);
+}
+EXPORT_SYMBOL(ar7_gpio_disable);
+
+struct titan_gpio_cfg {
+	u32 reg;
+	u32 shift;
+	u32 func;
+};
+
+static const struct titan_gpio_cfg titan_gpio_table[] = {
+	/* reg, start bit, mux value */
+	{4, 24, 1},
+	{4, 26, 1},
+	{4, 28, 1},
+	{4, 30, 1},
+	{5, 6, 1},
+	{5, 8, 1},
+	{5, 10, 1},
+	{5, 12, 1},
+	{7, 14, 3},
+	{7, 16, 3},
+	{7, 18, 3},
+	{7, 20, 3},
+	{7, 22, 3},
+	{7, 26, 3},
+	{7, 28, 3},
+	{7, 30, 3},
+	{8, 0, 3},
+	{8, 2, 3},
+	{8, 4, 3},
+	{8, 10, 3},
+	{8, 14, 3},
+	{8, 16, 3},
+	{8, 18, 3},
+	{8, 20, 3},
+	{9, 8, 3},
+	{9, 10, 3},
+	{9, 12, 3},
+	{9, 14, 3},
+	{9, 18, 3},
+	{9, 20, 3},
+	{9, 24, 3},
+	{9, 26, 3},
+	{9, 28, 3},
+	{9, 30, 3},
+	{10, 0, 3},
+	{10, 2, 3},
+	{10, 8, 3},
+	{10, 10, 3},
+	{10, 12, 3},
+	{10, 14, 3},
+	{13, 12, 3},
+	{13, 14, 3},
+	{13, 16, 3},
+	{13, 18, 3},
+	{13, 24, 3},
+	{13, 26, 3},
+	{13, 28, 3},
+	{13, 30, 3},
+	{14, 2, 3},
+	{14, 6, 3},
+	{14, 8, 3},
+	{14, 12, 3}
+};
+
+static int titan_gpio_pinsel(unsigned gpio)
+{
+	struct titan_gpio_cfg gpio_cfg;
+	u32 mux_status, pin_sel_reg, tmp;
+	void __iomem *pin_sel = (void __iomem *)KSEG1ADDR(AR7_REGS_PINSEL);
+
+	if (gpio >= ARRAY_SIZE(titan_gpio_table))
+		return -EINVAL;
+
+	gpio_cfg = titan_gpio_table[gpio];
+	pin_sel_reg = gpio_cfg.reg - 1;
+
+	mux_status = (readl(pin_sel + pin_sel_reg) >> gpio_cfg.shift) & 0x3;
+
+	/* Check the mux status */
+	if (!((mux_status == 0) || (mux_status == gpio_cfg.func)))
+		return 0;
+
+	/* Set the pin sel value */
+	tmp = readl(pin_sel + pin_sel_reg);
+	tmp |= ((gpio_cfg.func & 0x3) << gpio_cfg.shift);
+	writel(tmp, pin_sel + pin_sel_reg);
+
+	return 0;
+}
+
+/* Perform minimal Titan GPIO configuration */
+static void titan_gpio_init(void)
+{
+	unsigned i;
+
+	for (i = 44; i < 48; i++) {
+		titan_gpio_pinsel(i);
+		ar7_gpio_enable_titan(i);
+		titan_gpio_direction_input(&titan_gpio_chip.chip, i);
+	}
+}
+
+int __init ar7_gpio_init(void)
+{
+	int ret;
+	struct ar7_gpio_chip *gpch;
+	unsigned size;
+
+	if (!ar7_is_titan()) {
+		gpch = &ar7_gpio_chip;
+		size = 0x10;
+	} else {
+		gpch = &titan_gpio_chip;
+		size = 0x1f;
+	}
+
+	gpch->regs = ioremap(AR7_REGS_GPIO, size);
+	if (!gpch->regs) {
+		printk(KERN_ERR "%s: failed to ioremap regs\n",
+					gpch->chip.label);
+		return -ENOMEM;
+	}
+
+	ret = gpiochip_add_data(&gpch->chip, gpch);
+	if (ret) {
+		printk(KERN_ERR "%s: failed to add gpiochip\n",
+					gpch->chip.label);
+		iounmap(gpch->regs);
+		return ret;
+	}
+	printk(KERN_INFO "%s: registered %d GPIOs\n",
+				gpch->chip.label, gpch->chip.ngpio);
+
+	if (ar7_is_titan())
+		titan_gpio_init();
+
+	return ret;
+}
diff --git a/arch/mips/ar7/irq.c b/arch/mips/ar7/irq.c
new file mode 100644
index 000000000..f0a7942d3
--- /dev/null
+++ b/arch/mips/ar7/irq.c
@@ -0,0 +1,165 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2006,2007 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2006,2007 Eugene Konev <ejka@openwrt.org>
+ */
+
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+
+#include <asm/irq_cpu.h>
+#include <asm/mipsregs.h>
+#include <asm/mach-ar7/ar7.h>
+
+#define EXCEPT_OFFSET	0x80
+#define PACE_OFFSET	0xA0
+#define CHNLS_OFFSET	0x200
+
+#define REG_OFFSET(irq, reg)	((irq) / 32 * 0x4 + reg * 0x10)
+#define SEC_REG_OFFSET(reg)	(EXCEPT_OFFSET + reg * 0x8)
+#define SEC_SR_OFFSET		(SEC_REG_OFFSET(0))	/* 0x80 */
+#define CR_OFFSET(irq)		(REG_OFFSET(irq, 1))	/* 0x10 */
+#define SEC_CR_OFFSET		(SEC_REG_OFFSET(1))	/* 0x88 */
+#define ESR_OFFSET(irq)		(REG_OFFSET(irq, 2))	/* 0x20 */
+#define SEC_ESR_OFFSET		(SEC_REG_OFFSET(2))	/* 0x90 */
+#define ECR_OFFSET(irq)		(REG_OFFSET(irq, 3))	/* 0x30 */
+#define SEC_ECR_OFFSET		(SEC_REG_OFFSET(3))	/* 0x98 */
+#define PIR_OFFSET		(0x40)
+#define MSR_OFFSET		(0x44)
+#define PM_OFFSET(irq)		(REG_OFFSET(irq, 5))	/* 0x50 */
+#define TM_OFFSET(irq)		(REG_OFFSET(irq, 6))	/* 0x60 */
+
+#define REG(addr) ((u32 *)(KSEG1ADDR(AR7_REGS_IRQ) + addr))
+
+#define CHNL_OFFSET(chnl) (CHNLS_OFFSET + (chnl * 4))
+
+static int ar7_irq_base;
+
+static void ar7_unmask_irq(struct irq_data *d)
+{
+	writel(1 << ((d->irq - ar7_irq_base) % 32),
+	       REG(ESR_OFFSET(d->irq - ar7_irq_base)));
+}
+
+static void ar7_mask_irq(struct irq_data *d)
+{
+	writel(1 << ((d->irq - ar7_irq_base) % 32),
+	       REG(ECR_OFFSET(d->irq - ar7_irq_base)));
+}
+
+static void ar7_ack_irq(struct irq_data *d)
+{
+	writel(1 << ((d->irq - ar7_irq_base) % 32),
+	       REG(CR_OFFSET(d->irq - ar7_irq_base)));
+}
+
+static void ar7_unmask_sec_irq(struct irq_data *d)
+{
+	writel(1 << (d->irq - ar7_irq_base - 40), REG(SEC_ESR_OFFSET));
+}
+
+static void ar7_mask_sec_irq(struct irq_data *d)
+{
+	writel(1 << (d->irq - ar7_irq_base - 40), REG(SEC_ECR_OFFSET));
+}
+
+static void ar7_ack_sec_irq(struct irq_data *d)
+{
+	writel(1 << (d->irq - ar7_irq_base - 40), REG(SEC_CR_OFFSET));
+}
+
+static struct irq_chip ar7_irq_type = {
+	.name = "AR7",
+	.irq_unmask = ar7_unmask_irq,
+	.irq_mask = ar7_mask_irq,
+	.irq_ack = ar7_ack_irq
+};
+
+static struct irq_chip ar7_sec_irq_type = {
+	.name = "AR7",
+	.irq_unmask = ar7_unmask_sec_irq,
+	.irq_mask = ar7_mask_sec_irq,
+	.irq_ack = ar7_ack_sec_irq,
+};
+
+static void __init ar7_irq_init(int base)
+{
+	int i;
+	/*
+	 * Disable interrupts and clear pending
+	 */
+	writel(0xffffffff, REG(ECR_OFFSET(0)));
+	writel(0xff, REG(ECR_OFFSET(32)));
+	writel(0xffffffff, REG(SEC_ECR_OFFSET));
+	writel(0xffffffff, REG(CR_OFFSET(0)));
+	writel(0xff, REG(CR_OFFSET(32)));
+	writel(0xffffffff, REG(SEC_CR_OFFSET));
+
+	ar7_irq_base = base;
+
+	for (i = 0; i < 40; i++) {
+		writel(i, REG(CHNL_OFFSET(i)));
+		/* Primary IRQ's */
+		irq_set_chip_and_handler(base + i, &ar7_irq_type,
+					 handle_level_irq);
+		/* Secondary IRQ's */
+		if (i < 32)
+			irq_set_chip_and_handler(base + i + 40,
+						 &ar7_sec_irq_type,
+						 handle_level_irq);
+	}
+
+	if (request_irq(2, no_action, IRQF_NO_THREAD, "AR7 cascade interrupt",
+			NULL))
+		pr_err("Failed to request irq 2 (AR7 cascade interrupt)\n");
+	if (request_irq(ar7_irq_base, no_action, IRQF_NO_THREAD,
+			"AR7 cascade interrupt", NULL)) {
+		pr_err("Failed to request irq %d (AR7 cascade interrupt)\n",
+		       ar7_irq_base);
+	}
+	set_c0_status(IE_IRQ0);
+}
+
+void __init arch_init_irq(void)
+{
+	mips_cpu_irq_init();
+	ar7_irq_init(8);
+}
+
+static void ar7_cascade(void)
+{
+	u32 status;
+	int i, irq;
+
+	/* Primary IRQ's */
+	irq = readl(REG(PIR_OFFSET)) & 0x3f;
+	if (irq) {
+		do_IRQ(ar7_irq_base + irq);
+		return;
+	}
+
+	/* Secondary IRQ's are cascaded through primary '0' */
+	writel(1, REG(CR_OFFSET(irq)));
+	status = readl(REG(SEC_SR_OFFSET));
+	for (i = 0; i < 32; i++) {
+		if (status & 1) {
+			do_IRQ(ar7_irq_base + i + 40);
+			return;
+		}
+		status >>= 1;
+	}
+
+	spurious_interrupt();
+}
+
+asmlinkage void plat_irq_dispatch(void)
+{
+	unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
+	if (pending & STATUSF_IP7)		/* cpu timer */
+		do_IRQ(7);
+	else if (pending & STATUSF_IP2)		/* int0 hardware line */
+		ar7_cascade();
+	else
+		spurious_interrupt();
+}
diff --git a/arch/mips/ar7/memory.c b/arch/mips/ar7/memory.c
new file mode 100644
index 000000000..ce8024c1a
--- /dev/null
+++ b/arch/mips/ar7/memory.c
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2007 Eugene Konev <ejka@openwrt.org>
+ */
+#include <linux/memblock.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/pfn.h>
+#include <linux/proc_fs.h>
+#include <linux/string.h>
+#include <linux/swap.h>
+
+#include <asm/bootinfo.h>
+#include <asm/page.h>
+#include <asm/sections.h>
+
+#include <asm/mach-ar7/ar7.h>
+
+static int __init memsize(void)
+{
+	u32 size = (64 << 20);
+	u32 *addr = (u32 *)KSEG1ADDR(AR7_SDRAM_BASE + size - 4);
+	u32 *kernel_end = (u32 *)KSEG1ADDR(CPHYSADDR((u32)&_end));
+	u32 *tmpaddr = addr;
+
+	while (tmpaddr > kernel_end) {
+		*tmpaddr = (u32)tmpaddr;
+		size >>= 1;
+		tmpaddr -= size >> 2;
+	}
+
+	do {
+		tmpaddr += size >> 2;
+		if (*tmpaddr != (u32)tmpaddr)
+			break;
+		size <<= 1;
+	} while (size < (64 << 20));
+
+	writel((u32)tmpaddr, &addr);
+
+	return size;
+}
+
+void __init prom_meminit(void)
+{
+	unsigned long pages;
+
+	pages = memsize() >> PAGE_SHIFT;
+	memblock_add(PHYS_OFFSET, pages << PAGE_SHIFT);
+}
diff --git a/arch/mips/ar7/platform.c b/arch/mips/ar7/platform.c
new file mode 100644
index 000000000..215149a85
--- /dev/null
+++ b/arch/mips/ar7/platform.c
@@ -0,0 +1,722 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2006,2007 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2006,2007 Eugene Konev <ejka@openwrt.org>
+ */
+
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/physmap.h>
+#include <linux/serial.h>
+#include <linux/serial_8250.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/vlynq.h>
+#include <linux/leds.h>
+#include <linux/string.h>
+#include <linux/etherdevice.h>
+#include <linux/phy.h>
+#include <linux/phy_fixed.h>
+#include <linux/gpio.h>
+#include <linux/clk.h>
+
+#include <asm/addrspace.h>
+#include <asm/mach-ar7/ar7.h>
+#include <asm/mach-ar7/prom.h>
+
+/*****************************************************************************
+ * VLYNQ Bus
+ ****************************************************************************/
+struct plat_vlynq_data {
+	struct plat_vlynq_ops ops;
+	int gpio_bit;
+	int reset_bit;
+};
+
+static int vlynq_on(struct vlynq_device *dev)
+{
+	int ret;
+	struct plat_vlynq_data *pdata = dev->dev.platform_data;
+
+	ret = gpio_request(pdata->gpio_bit, "vlynq");
+	if (ret)
+		goto out;
+
+	ar7_device_reset(pdata->reset_bit);
+
+	ret = ar7_gpio_disable(pdata->gpio_bit);
+	if (ret)
+		goto out_enabled;
+
+	ret = ar7_gpio_enable(pdata->gpio_bit);
+	if (ret)
+		goto out_enabled;
+
+	ret = gpio_direction_output(pdata->gpio_bit, 0);
+	if (ret)
+		goto out_gpio_enabled;
+
+	msleep(50);
+
+	gpio_set_value(pdata->gpio_bit, 1);
+
+	msleep(50);
+
+	return 0;
+
+out_gpio_enabled:
+	ar7_gpio_disable(pdata->gpio_bit);
+out_enabled:
+	ar7_device_disable(pdata->reset_bit);
+	gpio_free(pdata->gpio_bit);
+out:
+	return ret;
+}
+
+static void vlynq_off(struct vlynq_device *dev)
+{
+	struct plat_vlynq_data *pdata = dev->dev.platform_data;
+
+	ar7_gpio_disable(pdata->gpio_bit);
+	gpio_free(pdata->gpio_bit);
+	ar7_device_disable(pdata->reset_bit);
+}
+
+static struct resource vlynq_low_res[] = {
+	{
+		.name	= "regs",
+		.flags	= IORESOURCE_MEM,
+		.start	= AR7_REGS_VLYNQ0,
+		.end	= AR7_REGS_VLYNQ0 + 0xff,
+	},
+	{
+		.name	= "irq",
+		.flags	= IORESOURCE_IRQ,
+		.start	= 29,
+		.end	= 29,
+	},
+	{
+		.name	= "mem",
+		.flags	= IORESOURCE_MEM,
+		.start	= 0x04000000,
+		.end	= 0x04ffffff,
+	},
+	{
+		.name	= "devirq",
+		.flags	= IORESOURCE_IRQ,
+		.start	= 80,
+		.end	= 111,
+	},
+};
+
+static struct resource vlynq_high_res[] = {
+	{
+		.name	= "regs",
+		.flags	= IORESOURCE_MEM,
+		.start	= AR7_REGS_VLYNQ1,
+		.end	= AR7_REGS_VLYNQ1 + 0xff,
+	},
+	{
+		.name	= "irq",
+		.flags	= IORESOURCE_IRQ,
+		.start	= 33,
+		.end	= 33,
+	},
+	{
+		.name	= "mem",
+		.flags	= IORESOURCE_MEM,
+		.start	= 0x0c000000,
+		.end	= 0x0cffffff,
+	},
+	{
+		.name	= "devirq",
+		.flags	= IORESOURCE_IRQ,
+		.start	= 112,
+		.end	= 143,
+	},
+};
+
+static struct plat_vlynq_data vlynq_low_data = {
+	.ops = {
+		.on	= vlynq_on,
+		.off	= vlynq_off,
+	},
+	.reset_bit	= 20,
+	.gpio_bit	= 18,
+};
+
+static struct plat_vlynq_data vlynq_high_data = {
+	.ops = {
+		.on	= vlynq_on,
+		.off	= vlynq_off,
+	},
+	.reset_bit	= 16,
+	.gpio_bit	= 19,
+};
+
+static struct platform_device vlynq_low = {
+	.id		= 0,
+	.name		= "vlynq",
+	.dev = {
+		.platform_data	= &vlynq_low_data,
+	},
+	.resource	= vlynq_low_res,
+	.num_resources	= ARRAY_SIZE(vlynq_low_res),
+};
+
+static struct platform_device vlynq_high = {
+	.id		= 1,
+	.name		= "vlynq",
+	.dev = {
+		.platform_data	= &vlynq_high_data,
+	},
+	.resource	= vlynq_high_res,
+	.num_resources	= ARRAY_SIZE(vlynq_high_res),
+};
+
+/*****************************************************************************
+ * Flash
+ ****************************************************************************/
+static struct resource physmap_flash_resource = {
+	.name	= "mem",
+	.flags	= IORESOURCE_MEM,
+	.start	= 0x10000000,
+	.end	= 0x107fffff,
+};
+
+static const char *ar7_probe_types[] = { "ar7part", NULL };
+
+static struct physmap_flash_data physmap_flash_data = {
+	.width	= 2,
+	.part_probe_types = ar7_probe_types,
+};
+
+static struct platform_device physmap_flash = {
+	.name		= "physmap-flash",
+	.dev = {
+		.platform_data	= &physmap_flash_data,
+	},
+	.resource	= &physmap_flash_resource,
+	.num_resources	= 1,
+};
+
+/*****************************************************************************
+ * Ethernet
+ ****************************************************************************/
+static struct resource cpmac_low_res[] = {
+	{
+		.name	= "regs",
+		.flags	= IORESOURCE_MEM,
+		.start	= AR7_REGS_MAC0,
+		.end	= AR7_REGS_MAC0 + 0x7ff,
+	},
+	{
+		.name	= "irq",
+		.flags	= IORESOURCE_IRQ,
+		.start	= 27,
+		.end	= 27,
+	},
+};
+
+static struct resource cpmac_high_res[] = {
+	{
+		.name	= "regs",
+		.flags	= IORESOURCE_MEM,
+		.start	= AR7_REGS_MAC1,
+		.end	= AR7_REGS_MAC1 + 0x7ff,
+	},
+	{
+		.name	= "irq",
+		.flags	= IORESOURCE_IRQ,
+		.start	= 41,
+		.end	= 41,
+	},
+};
+
+static struct fixed_phy_status fixed_phy_status __initdata = {
+	.link		= 1,
+	.speed		= 100,
+	.duplex		= 1,
+};
+
+static struct plat_cpmac_data cpmac_low_data = {
+	.reset_bit	= 17,
+	.power_bit	= 20,
+	.phy_mask	= 0x80000000,
+};
+
+static struct plat_cpmac_data cpmac_high_data = {
+	.reset_bit	= 21,
+	.power_bit	= 22,
+	.phy_mask	= 0x7fffffff,
+};
+
+static u64 cpmac_dma_mask = DMA_BIT_MASK(32);
+
+static struct platform_device cpmac_low = {
+	.id		= 0,
+	.name		= "cpmac",
+	.dev = {
+		.dma_mask		= &cpmac_dma_mask,
+		.coherent_dma_mask	= DMA_BIT_MASK(32),
+		.platform_data		= &cpmac_low_data,
+	},
+	.resource	= cpmac_low_res,
+	.num_resources	= ARRAY_SIZE(cpmac_low_res),
+};
+
+static struct platform_device cpmac_high = {
+	.id		= 1,
+	.name		= "cpmac",
+	.dev = {
+		.dma_mask		= &cpmac_dma_mask,
+		.coherent_dma_mask	= DMA_BIT_MASK(32),
+		.platform_data		= &cpmac_high_data,
+	},
+	.resource	= cpmac_high_res,
+	.num_resources	= ARRAY_SIZE(cpmac_high_res),
+};
+
+static void __init cpmac_get_mac(int instance, unsigned char *dev_addr)
+{
+	char name[5], *mac;
+
+	sprintf(name, "mac%c", 'a' + instance);
+	mac = prom_getenv(name);
+	if (!mac && instance) {
+		sprintf(name, "mac%c", 'a');
+		mac = prom_getenv(name);
+	}
+
+	if (mac) {
+		if (!mac_pton(mac, dev_addr)) {
+			pr_warn("cannot parse mac address, using random address\n");
+			eth_random_addr(dev_addr);
+		}
+	} else
+		eth_random_addr(dev_addr);
+}
+
+/*****************************************************************************
+ * USB
+ ****************************************************************************/
+static struct resource usb_res[] = {
+	{
+		.name	= "regs",
+		.flags	= IORESOURCE_MEM,
+		.start	= AR7_REGS_USB,
+		.end	= AR7_REGS_USB + 0xff,
+	},
+	{
+		.name	= "irq",
+		.flags	= IORESOURCE_IRQ,
+		.start	= 32,
+		.end	= 32,
+	},
+	{
+		.name	= "mem",
+		.flags	= IORESOURCE_MEM,
+		.start	= 0x03400000,
+		.end	= 0x03401fff,
+	},
+};
+
+static struct platform_device ar7_udc = {
+	.name		= "ar7_udc",
+	.resource	= usb_res,
+	.num_resources	= ARRAY_SIZE(usb_res),
+};
+
+/*****************************************************************************
+ * LEDs
+ ****************************************************************************/
+static const struct gpio_led default_leds[] = {
+	{
+		.name			= "status",
+		.gpio			= 8,
+		.active_low		= 1,
+	},
+};
+
+static const struct gpio_led titan_leds[] = {
+	{ .name = "status", .gpio = 8, .active_low = 1, },
+	{ .name = "wifi", .gpio = 13, .active_low = 1, },
+};
+
+static const struct gpio_led dsl502t_leds[] = {
+	{
+		.name			= "status",
+		.gpio			= 9,
+		.active_low		= 1,
+	},
+	{
+		.name			= "ethernet",
+		.gpio			= 7,
+		.active_low		= 1,
+	},
+	{
+		.name			= "usb",
+		.gpio			= 12,
+		.active_low		= 1,
+	},
+};
+
+static const struct gpio_led dg834g_leds[] = {
+	{
+		.name			= "ppp",
+		.gpio			= 6,
+		.active_low		= 1,
+	},
+	{
+		.name			= "status",
+		.gpio			= 7,
+		.active_low		= 1,
+	},
+	{
+		.name			= "adsl",
+		.gpio			= 8,
+		.active_low		= 1,
+	},
+	{
+		.name			= "wifi",
+		.gpio			= 12,
+		.active_low		= 1,
+	},
+	{
+		.name			= "power",
+		.gpio			= 14,
+		.active_low		= 1,
+		.default_trigger	= "default-on",
+	},
+};
+
+static const struct gpio_led fb_sl_leds[] = {
+	{
+		.name			= "1",
+		.gpio			= 7,
+	},
+	{
+		.name			= "2",
+		.gpio			= 13,
+		.active_low		= 1,
+	},
+	{
+		.name			= "3",
+		.gpio			= 10,
+		.active_low		= 1,
+	},
+	{
+		.name			= "4",
+		.gpio			= 12,
+		.active_low		= 1,
+	},
+	{
+		.name			= "5",
+		.gpio			= 9,
+		.active_low		= 1,
+	},
+};
+
+static const struct gpio_led fb_fon_leds[] = {
+	{
+		.name			= "1",
+		.gpio			= 8,
+	},
+	{
+		.name			= "2",
+		.gpio			= 3,
+		.active_low		= 1,
+	},
+	{
+		.name			= "3",
+		.gpio			= 5,
+	},
+	{
+		.name			= "4",
+		.gpio			= 4,
+		.active_low		= 1,
+	},
+	{
+		.name			= "5",
+		.gpio			= 11,
+		.active_low		= 1,
+	},
+};
+
+static const struct gpio_led gt701_leds[] = {
+	{
+		.name			= "inet:green",
+		.gpio			= 13,
+		.active_low		= 1,
+	},
+	{
+		.name			= "usb",
+		.gpio			= 12,
+		.active_low		= 1,
+	},
+	{
+		.name			= "inet:red",
+		.gpio			= 9,
+		.active_low		= 1,
+	},
+	{
+		.name			= "power:red",
+		.gpio			= 7,
+		.active_low		= 1,
+	},
+	{
+		.name			= "power:green",
+		.gpio			= 8,
+		.active_low		= 1,
+		.default_trigger	= "default-on",
+	},
+	{
+		.name			= "ethernet",
+		.gpio			= 10,
+		.active_low		= 1,
+	},
+};
+
+static struct gpio_led_platform_data ar7_led_data;
+
+static struct platform_device ar7_gpio_leds = {
+	.name = "leds-gpio",
+	.dev = {
+		.platform_data = &ar7_led_data,
+	}
+};
+
+static void __init detect_leds(void)
+{
+	char *prid, *usb_prod;
+
+	/* Default LEDs */
+	ar7_led_data.num_leds = ARRAY_SIZE(default_leds);
+	ar7_led_data.leds = default_leds;
+
+	/* FIXME: the whole thing is unreliable */
+	prid = prom_getenv("ProductID");
+	usb_prod = prom_getenv("usb_prod");
+
+	/* If we can't get the product id from PROM, use the default LEDs */
+	if (!prid)
+		return;
+
+	if (strstr(prid, "Fritz_Box_FON")) {
+		ar7_led_data.num_leds = ARRAY_SIZE(fb_fon_leds);
+		ar7_led_data.leds = fb_fon_leds;
+	} else if (strstr(prid, "Fritz_Box_")) {
+		ar7_led_data.num_leds = ARRAY_SIZE(fb_sl_leds);
+		ar7_led_data.leds = fb_sl_leds;
+	} else if ((!strcmp(prid, "AR7RD") || !strcmp(prid, "AR7DB"))
+		&& usb_prod != NULL && strstr(usb_prod, "DSL-502T")) {
+		ar7_led_data.num_leds = ARRAY_SIZE(dsl502t_leds);
+		ar7_led_data.leds = dsl502t_leds;
+	} else if (strstr(prid, "DG834")) {
+		ar7_led_data.num_leds = ARRAY_SIZE(dg834g_leds);
+		ar7_led_data.leds = dg834g_leds;
+	} else if (strstr(prid, "CYWM") || strstr(prid, "CYWL")) {
+		ar7_led_data.num_leds = ARRAY_SIZE(titan_leds);
+		ar7_led_data.leds = titan_leds;
+	} else if (strstr(prid, "GT701")) {
+		ar7_led_data.num_leds = ARRAY_SIZE(gt701_leds);
+		ar7_led_data.leds = gt701_leds;
+	}
+}
+
+/*****************************************************************************
+ * Watchdog
+ ****************************************************************************/
+static struct resource ar7_wdt_res = {
+	.name		= "regs",
+	.flags		= IORESOURCE_MEM,
+	.start		= -1,	/* Filled at runtime */
+	.end		= -1,	/* Filled at runtime */
+};
+
+static struct platform_device ar7_wdt = {
+	.name		= "ar7_wdt",
+	.resource	= &ar7_wdt_res,
+	.num_resources	= 1,
+};
+
+/*****************************************************************************
+ * Init
+ ****************************************************************************/
+static int __init ar7_register_uarts(void)
+{
+#ifdef CONFIG_SERIAL_8250
+	static struct uart_port uart_port __initdata;
+	struct clk *bus_clk;
+	int res;
+
+	memset(&uart_port, 0, sizeof(struct uart_port));
+
+	bus_clk = clk_get(NULL, "bus");
+	if (IS_ERR(bus_clk))
+		panic("unable to get bus clk");
+
+	uart_port.type		= PORT_AR7;
+	uart_port.uartclk	= clk_get_rate(bus_clk) / 2;
+	uart_port.iotype	= UPIO_MEM32;
+	uart_port.flags		= UPF_FIXED_TYPE | UPF_BOOT_AUTOCONF;
+	uart_port.regshift	= 2;
+
+	uart_port.line		= 0;
+	uart_port.irq		= AR7_IRQ_UART0;
+	uart_port.mapbase	= AR7_REGS_UART0;
+	uart_port.membase	= ioremap(uart_port.mapbase, 256);
+
+	res = early_serial_setup(&uart_port);
+	if (res)
+		return res;
+
+	/* Only TNETD73xx have a second serial port */
+	if (ar7_has_second_uart()) {
+		uart_port.line		= 1;
+		uart_port.irq		= AR7_IRQ_UART1;
+		uart_port.mapbase	= UR8_REGS_UART1;
+		uart_port.membase	= ioremap(uart_port.mapbase, 256);
+
+		res = early_serial_setup(&uart_port);
+		if (res)
+			return res;
+	}
+#endif
+
+	return 0;
+}
+
+static void __init titan_fixup_devices(void)
+{
+	/* Set vlynq0 data */
+	vlynq_low_data.reset_bit = 15;
+	vlynq_low_data.gpio_bit = 14;
+
+	/* Set vlynq1 data */
+	vlynq_high_data.reset_bit = 16;
+	vlynq_high_data.gpio_bit = 7;
+
+	/* Set vlynq0 resources */
+	vlynq_low_res[0].start = TITAN_REGS_VLYNQ0;
+	vlynq_low_res[0].end = TITAN_REGS_VLYNQ0 + 0xff;
+	vlynq_low_res[1].start = 33;
+	vlynq_low_res[1].end = 33;
+	vlynq_low_res[2].start = 0x0c000000;
+	vlynq_low_res[2].end = 0x0fffffff;
+	vlynq_low_res[3].start = 80;
+	vlynq_low_res[3].end = 111;
+
+	/* Set vlynq1 resources */
+	vlynq_high_res[0].start = TITAN_REGS_VLYNQ1;
+	vlynq_high_res[0].end = TITAN_REGS_VLYNQ1 + 0xff;
+	vlynq_high_res[1].start = 34;
+	vlynq_high_res[1].end = 34;
+	vlynq_high_res[2].start = 0x40000000;
+	vlynq_high_res[2].end = 0x43ffffff;
+	vlynq_high_res[3].start = 112;
+	vlynq_high_res[3].end = 143;
+
+	/* Set cpmac0 data */
+	cpmac_low_data.phy_mask = 0x40000000;
+
+	/* Set cpmac1 data */
+	cpmac_high_data.phy_mask = 0x80000000;
+
+	/* Set cpmac0 resources */
+	cpmac_low_res[0].start = TITAN_REGS_MAC0;
+	cpmac_low_res[0].end = TITAN_REGS_MAC0 + 0x7ff;
+
+	/* Set cpmac1 resources */
+	cpmac_high_res[0].start = TITAN_REGS_MAC1;
+	cpmac_high_res[0].end = TITAN_REGS_MAC1 + 0x7ff;
+}
+
+static int __init ar7_register_devices(void)
+{
+	void __iomem *bootcr;
+	u32 val;
+	int res;
+
+	res = ar7_gpio_init();
+	if (res)
+		pr_warn("unable to register gpios: %d\n", res);
+
+	res = ar7_register_uarts();
+	if (res)
+		pr_err("unable to setup uart(s): %d\n", res);
+
+	res = platform_device_register(&physmap_flash);
+	if (res)
+		pr_warn("unable to register physmap-flash: %d\n", res);
+
+	if (ar7_is_titan())
+		titan_fixup_devices();
+
+	ar7_device_disable(vlynq_low_data.reset_bit);
+	res = platform_device_register(&vlynq_low);
+	if (res)
+		pr_warn("unable to register vlynq-low: %d\n", res);
+
+	if (ar7_has_high_vlynq()) {
+		ar7_device_disable(vlynq_high_data.reset_bit);
+		res = platform_device_register(&vlynq_high);
+		if (res)
+			pr_warn("unable to register vlynq-high: %d\n", res);
+	}
+
+	if (ar7_has_high_cpmac()) {
+		res = fixed_phy_add(PHY_POLL, cpmac_high.id,
+				    &fixed_phy_status);
+		if (!res) {
+			cpmac_get_mac(1, cpmac_high_data.dev_addr);
+
+			res = platform_device_register(&cpmac_high);
+			if (res)
+				pr_warn("unable to register cpmac-high: %d\n",
+					res);
+		} else
+			pr_warn("unable to add cpmac-high phy: %d\n", res);
+	} else
+		cpmac_low_data.phy_mask = 0xffffffff;
+
+	res = fixed_phy_add(PHY_POLL, cpmac_low.id, &fixed_phy_status);
+	if (!res) {
+		cpmac_get_mac(0, cpmac_low_data.dev_addr);
+		res = platform_device_register(&cpmac_low);
+		if (res)
+			pr_warn("unable to register cpmac-low: %d\n", res);
+	} else
+		pr_warn("unable to add cpmac-low phy: %d\n", res);
+
+	detect_leds();
+	res = platform_device_register(&ar7_gpio_leds);
+	if (res)
+		pr_warn("unable to register leds: %d\n", res);
+
+	res = platform_device_register(&ar7_udc);
+	if (res)
+		pr_warn("unable to register usb slave: %d\n", res);
+
+	/* Register watchdog only if enabled in hardware */
+	bootcr = ioremap(AR7_REGS_DCL, 4);
+	val = readl(bootcr);
+	iounmap(bootcr);
+	if (val & AR7_WDT_HW_ENA) {
+		if (ar7_has_high_vlynq())
+			ar7_wdt_res.start = UR8_REGS_WDT;
+		else
+			ar7_wdt_res.start = AR7_REGS_WDT;
+
+		ar7_wdt_res.end = ar7_wdt_res.start + 0x20;
+		res = platform_device_register(&ar7_wdt);
+		if (res)
+			pr_warn("unable to register watchdog: %d\n", res);
+	}
+
+	return 0;
+}
+device_initcall(ar7_register_devices);
diff --git a/arch/mips/ar7/prom.c b/arch/mips/ar7/prom.c
new file mode 100644
index 000000000..5810d3993
--- /dev/null
+++ b/arch/mips/ar7/prom.c
@@ -0,0 +1,256 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
+ *
+ * Putting things on the screen/serial line using YAMONs facilities.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/serial_reg.h>
+#include <linux/spinlock.h>
+#include <linux/export.h>
+#include <linux/string.h>
+#include <linux/io.h>
+#include <asm/bootinfo.h>
+#include <asm/setup.h>
+
+#include <asm/mach-ar7/ar7.h>
+#include <asm/mach-ar7/prom.h>
+
+#define MAX_ENTRY 80
+
+struct env_var {
+	char	*name;
+	char	*value;
+};
+
+static struct env_var adam2_env[MAX_ENTRY];
+
+char *prom_getenv(const char *name)
+{
+	int i;
+
+	for (i = 0; (i < MAX_ENTRY) && adam2_env[i].name; i++)
+		if (!strcmp(name, adam2_env[i].name))
+			return adam2_env[i].value;
+
+	return NULL;
+}
+EXPORT_SYMBOL(prom_getenv);
+
+static void  __init ar7_init_cmdline(int argc, char *argv[])
+{
+	int i;
+
+	for (i = 1; i < argc; i++) {
+		strlcat(arcs_cmdline, argv[i], COMMAND_LINE_SIZE);
+		if (i < (argc - 1))
+			strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
+	}
+}
+
+struct psbl_rec {
+	u32	psbl_size;
+	u32	env_base;
+	u32	env_size;
+	u32	ffs_base;
+	u32	ffs_size;
+};
+
+static const char psp_env_version[] __initconst = "TIENV0.8";
+
+struct psp_env_chunk {
+	u8	num;
+	u8	ctrl;
+	u16	csum;
+	u8	len;
+	char	data[11];
+} __packed;
+
+struct psp_var_map_entry {
+	u8	num;
+	char	*value;
+};
+
+static const struct psp_var_map_entry psp_var_map[] = {
+	{  1,	"cpufrequency" },
+	{  2,	"memsize" },
+	{  3,	"flashsize" },
+	{  4,	"modetty0" },
+	{  5,	"modetty1" },
+	{  8,	"maca" },
+	{  9,	"macb" },
+	{ 28,	"sysfrequency" },
+	{ 38,	"mipsfrequency" },
+};
+
+/*
+
+Well-known variable (num is looked up in table above for matching variable name)
+Example: cpufrequency=211968000
++----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
+| 01 |CTRL|CHECKSUM | 01 | _2 | _1 | _1 | _9 | _6 | _8 | _0 | _0 | _0 | \0 | FF
++----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
+
+Name=Value pair in a single chunk
+Example: NAME=VALUE
++----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
+| 00 |CTRL|CHECKSUM | 01 | _N | _A | _M | _E | _0 | _V | _A | _L | _U | _E | \0
++----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
+
+Name=Value pair in 2 chunks (len is the number of chunks)
+Example: bootloaderVersion=1.3.7.15
++----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
+| 00 |CTRL|CHECKSUM | 02 | _b | _o | _o | _t | _l | _o | _a | _d | _e | _r | _V
++----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
+| _e | _r | _s | _i | _o | _n | \0 | _1 | _. | _3 | _. | _7 | _. | _1 | _5 | \0
++----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+---
+
+Data is padded with 0xFF
+
+*/
+
+#define PSP_ENV_SIZE  4096
+
+static char psp_env_data[PSP_ENV_SIZE] = { 0, };
+
+static char * __init lookup_psp_var_map(u8 num)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(psp_var_map); i++)
+		if (psp_var_map[i].num == num)
+			return psp_var_map[i].value;
+
+	return NULL;
+}
+
+static void __init add_adam2_var(char *name, char *value)
+{
+	int i;
+
+	for (i = 0; i < MAX_ENTRY; i++) {
+		if (!adam2_env[i].name) {
+			adam2_env[i].name = name;
+			adam2_env[i].value = value;
+			return;
+		} else if (!strcmp(adam2_env[i].name, name)) {
+			adam2_env[i].value = value;
+			return;
+		}
+	}
+}
+
+static int __init parse_psp_env(void *psp_env_base)
+{
+	int i, n;
+	char *name, *value;
+	struct psp_env_chunk *chunks = (struct psp_env_chunk *)psp_env_data;
+
+	memcpy_fromio(chunks, psp_env_base, PSP_ENV_SIZE);
+
+	i = 1;
+	n = PSP_ENV_SIZE / sizeof(struct psp_env_chunk);
+	while (i < n) {
+		if ((chunks[i].num == 0xff) || ((i + chunks[i].len) > n))
+			break;
+		value = chunks[i].data;
+		if (chunks[i].num) {
+			name = lookup_psp_var_map(chunks[i].num);
+		} else {
+			name = value;
+			value += strlen(name) + 1;
+		}
+		if (name)
+			add_adam2_var(name, value);
+		i += chunks[i].len;
+	}
+	return 0;
+}
+
+static void __init ar7_init_env(struct env_var *env)
+{
+	int i;
+	struct psbl_rec *psbl = (struct psbl_rec *)(KSEG1ADDR(0x14000300));
+	void *psp_env = (void *)KSEG1ADDR(psbl->env_base);
+
+	if (strcmp(psp_env, psp_env_version) == 0) {
+		parse_psp_env(psp_env);
+	} else {
+		for (i = 0; i < MAX_ENTRY; i++, env++)
+			if (env->name)
+				add_adam2_var(env->name, env->value);
+	}
+}
+
+static void __init console_config(void)
+{
+#ifdef CONFIG_SERIAL_8250_CONSOLE
+	char console_string[40];
+	int baud = 0;
+	char parity = '\0', bits = '\0', flow = '\0';
+	char *s, *p;
+
+	if (strstr(arcs_cmdline, "console="))
+		return;
+
+	s = prom_getenv("modetty0");
+	if (s) {
+		baud = simple_strtoul(s, &p, 10);
+		s = p;
+		if (*s == ',')
+			s++;
+		if (*s)
+			parity = *s++;
+		if (*s == ',')
+			s++;
+		if (*s)
+			bits = *s++;
+		if (*s == ',')
+			s++;
+		if (*s == 'h')
+			flow = 'r';
+	}
+
+	if (baud == 0)
+		baud = 38400;
+	if (parity != 'n' && parity != 'o' && parity != 'e')
+		parity = 'n';
+	if (bits != '7' && bits != '8')
+		bits = '8';
+
+	if (flow == 'r')
+		sprintf(console_string, " console=ttyS0,%d%c%c%c", baud,
+			parity, bits, flow);
+	else
+		sprintf(console_string, " console=ttyS0,%d%c%c", baud, parity,
+			bits);
+	strlcat(arcs_cmdline, console_string, COMMAND_LINE_SIZE);
+#endif
+}
+
+void __init prom_init(void)
+{
+	ar7_init_cmdline(fw_arg0, (char **)fw_arg1);
+	ar7_init_env((struct env_var *)fw_arg2);
+	console_config();
+}
+
+#define PORT(offset) (KSEG1ADDR(AR7_REGS_UART0 + (offset * 4)))
+static inline unsigned int serial_in(int offset)
+{
+	return readl((void *)PORT(offset));
+}
+
+static inline void serial_out(int offset, int value)
+{
+	writel(value, (void *)PORT(offset));
+}
+
+void prom_putchar(char c)
+{
+	while ((serial_in(UART_LSR) & UART_LSR_TEMT) == 0)
+		;
+	serial_out(UART_TX, c);
+}
diff --git a/arch/mips/ar7/setup.c b/arch/mips/ar7/setup.c
new file mode 100644
index 000000000..352d5dbc7
--- /dev/null
+++ b/arch/mips/ar7/setup.c
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
+ */
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/pm.h>
+#include <linux/time.h>
+
+#include <asm/reboot.h>
+#include <asm/mach-ar7/ar7.h>
+#include <asm/mach-ar7/prom.h>
+
+static void ar7_machine_restart(char *command)
+{
+	u32 *softres_reg = ioremap(AR7_REGS_RESET + AR7_RESET_SOFTWARE, 1);
+
+	writel(1, softres_reg);
+}
+
+static void ar7_machine_halt(void)
+{
+	while (1)
+		;
+}
+
+static void ar7_machine_power_off(void)
+{
+	u32 *power_reg = (u32 *)ioremap(AR7_REGS_POWER, 1);
+	u32 power_state = readl(power_reg) | (3 << 30);
+
+	writel(power_state, power_reg);
+	ar7_machine_halt();
+}
+
+const char *get_system_type(void)
+{
+	u16 chip_id = ar7_chip_id();
+	u16 titan_variant_id = titan_chip_id();
+
+	switch (chip_id) {
+	case AR7_CHIP_7100:
+		return "TI AR7 (TNETD7100)";
+	case AR7_CHIP_7200:
+		return "TI AR7 (TNETD7200)";
+	case AR7_CHIP_7300:
+		return "TI AR7 (TNETD7300)";
+	case AR7_CHIP_TITAN:
+		switch (titan_variant_id) {
+		case TITAN_CHIP_1050:
+			return "TI AR7 (TNETV1050)";
+		case TITAN_CHIP_1055:
+			return "TI AR7 (TNETV1055)";
+		case TITAN_CHIP_1056:
+			return "TI AR7 (TNETV1056)";
+		case TITAN_CHIP_1060:
+			return "TI AR7 (TNETV1060)";
+		}
+		fallthrough;
+	default:
+		return "TI AR7 (unknown)";
+	}
+}
+
+static int __init ar7_init_console(void)
+{
+	return 0;
+}
+console_initcall(ar7_init_console);
+
+/*
+ * Initializes basic routines and structures pointers, memory size (as
+ * given by the bios and saves the command line.
+ */
+void __init plat_mem_setup(void)
+{
+	unsigned long io_base;
+
+	_machine_restart = ar7_machine_restart;
+	_machine_halt = ar7_machine_halt;
+	pm_power_off = ar7_machine_power_off;
+
+	io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000);
+	if (!io_base)
+		panic("Can't remap IO base!");
+	set_io_port_base(io_base);
+
+	prom_meminit();
+
+	printk(KERN_INFO "%s, ID: 0x%04x, Revision: 0x%02x\n",
+			get_system_type(), ar7_chip_id(), ar7_chip_rev());
+}
diff --git a/arch/mips/ar7/time.c b/arch/mips/ar7/time.c
new file mode 100644
index 000000000..72aa77d70
--- /dev/null
+++ b/arch/mips/ar7/time.c
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
+ *
+ * Setting up the clock on the MIPS boards.
+ */
+
+#include <linux/init.h>
+#include <linux/time.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+
+#include <asm/time.h>
+#include <asm/mach-ar7/ar7.h>
+
+void __init plat_time_init(void)
+{
+	struct clk *cpu_clk;
+
+	/* Initialize ar7 clocks so the CPU clock frequency is correct */
+	ar7_init_clocks();
+
+	cpu_clk = clk_get(NULL, "cpu");
+	if (IS_ERR(cpu_clk)) {
+		printk(KERN_ERR "unable to get cpu clock\n");
+		return;
+	}
+
+	mips_hpt_frequency = clk_get_rate(cpu_clk) / 2;
+}