v4.19.13 snapshot.
diff --git a/arch/arm/mach-ixp4xx/nslu2-setup.c b/arch/arm/mach-ixp4xx/nslu2-setup.c
new file mode 100644
index 0000000..341b263
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/nslu2-setup.c
@@ -0,0 +1,320 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * arch/arm/mach-ixp4xx/nslu2-setup.c
+ *
+ * NSLU2 board-setup
+ *
+ * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
+ *
+ * based on ixdp425-setup.c:
+ * Copyright (C) 2003-2004 MontaVista Software, Inc.
+ * based on nslu2-power.c:
+ * Copyright (C) 2005 Tower Technologies
+ *
+ * Author: Mark Rakes <mrakes at mac.com>
+ * Author: Rod Whitby <rod@whitby.id.au>
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ * Maintainers: http://www.nslu2-linux.org/
+ *
+ */
+#include <linux/gpio.h>
+#include <linux/if_ether.h>
+#include <linux/irq.h>
+#include <linux/serial.h>
+#include <linux/serial_8250.h>
+#include <linux/leds.h>
+#include <linux/reboot.h>
+#include <linux/i2c.h>
+#include <linux/gpio/machine.h>
+#include <linux/io.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/flash.h>
+#include <asm/mach/time.h>
+
+#define NSLU2_SDA_PIN 7
+#define NSLU2_SCL_PIN 6
+
+/* NSLU2 Timer */
+#define NSLU2_FREQ 66000000
+
+/* Buttons */
+#define NSLU2_PB_GPIO 5 /* power button */
+#define NSLU2_PO_GPIO 8 /* power off */
+#define NSLU2_RB_GPIO 12 /* reset button */
+
+/* Buzzer */
+#define NSLU2_GPIO_BUZZ 4
+
+/* LEDs */
+#define NSLU2_LED_RED_GPIO 0
+#define NSLU2_LED_GRN_GPIO 1
+#define NSLU2_LED_DISK1_GPIO 3
+#define NSLU2_LED_DISK2_GPIO 2
+
+static struct flash_platform_data nslu2_flash_data = {
+ .map_name = "cfi_probe",
+ .width = 2,
+};
+
+static struct resource nslu2_flash_resource = {
+ .flags = IORESOURCE_MEM,
+};
+
+static struct platform_device nslu2_flash = {
+ .name = "IXP4XX-Flash",
+ .id = 0,
+ .dev.platform_data = &nslu2_flash_data,
+ .num_resources = 1,
+ .resource = &nslu2_flash_resource,
+};
+
+static struct gpiod_lookup_table nslu2_i2c_gpiod_table = {
+ .dev_id = "i2c-gpio.0",
+ .table = {
+ GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NSLU2_SDA_PIN,
+ NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+ GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NSLU2_SCL_PIN,
+ NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
+ },
+};
+
+static struct i2c_board_info __initdata nslu2_i2c_board_info [] = {
+ {
+ I2C_BOARD_INFO("x1205", 0x6f),
+ },
+};
+
+static struct gpio_led nslu2_led_pins[] = {
+ {
+ .name = "nslu2:green:ready",
+ .gpio = NSLU2_LED_GRN_GPIO,
+ },
+ {
+ .name = "nslu2:red:status",
+ .gpio = NSLU2_LED_RED_GPIO,
+ },
+ {
+ .name = "nslu2:green:disk-1",
+ .gpio = NSLU2_LED_DISK1_GPIO,
+ .active_low = true,
+ },
+ {
+ .name = "nslu2:green:disk-2",
+ .gpio = NSLU2_LED_DISK2_GPIO,
+ .active_low = true,
+ },
+};
+
+static struct gpio_led_platform_data nslu2_led_data = {
+ .num_leds = ARRAY_SIZE(nslu2_led_pins),
+ .leds = nslu2_led_pins,
+};
+
+static struct platform_device nslu2_leds = {
+ .name = "leds-gpio",
+ .id = -1,
+ .dev.platform_data = &nslu2_led_data,
+};
+
+static struct platform_device nslu2_i2c_gpio = {
+ .name = "i2c-gpio",
+ .id = 0,
+ .dev = {
+ .platform_data = NULL,
+ },
+};
+
+static struct platform_device nslu2_beeper = {
+ .name = "ixp4xx-beeper",
+ .id = NSLU2_GPIO_BUZZ,
+ .num_resources = 0,
+};
+
+static struct resource nslu2_uart_resources[] = {
+ {
+ .start = IXP4XX_UART1_BASE_PHYS,
+ .end = IXP4XX_UART1_BASE_PHYS + 0x0fff,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = IXP4XX_UART2_BASE_PHYS,
+ .end = IXP4XX_UART2_BASE_PHYS + 0x0fff,
+ .flags = IORESOURCE_MEM,
+ }
+};
+
+static struct plat_serial8250_port nslu2_uart_data[] = {
+ {
+ .mapbase = IXP4XX_UART1_BASE_PHYS,
+ .membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
+ .irq = IRQ_IXP4XX_UART1,
+ .flags = UPF_BOOT_AUTOCONF,
+ .iotype = UPIO_MEM,
+ .regshift = 2,
+ .uartclk = IXP4XX_UART_XTAL,
+ },
+ {
+ .mapbase = IXP4XX_UART2_BASE_PHYS,
+ .membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
+ .irq = IRQ_IXP4XX_UART2,
+ .flags = UPF_BOOT_AUTOCONF,
+ .iotype = UPIO_MEM,
+ .regshift = 2,
+ .uartclk = IXP4XX_UART_XTAL,
+ },
+ { }
+};
+
+static struct platform_device nslu2_uart = {
+ .name = "serial8250",
+ .id = PLAT8250_DEV_PLATFORM,
+ .dev.platform_data = nslu2_uart_data,
+ .num_resources = 2,
+ .resource = nslu2_uart_resources,
+};
+
+/* Built-in 10/100 Ethernet MAC interfaces */
+static struct eth_plat_info nslu2_plat_eth[] = {
+ {
+ .phy = 1,
+ .rxq = 3,
+ .txreadyq = 20,
+ }
+};
+
+static struct platform_device nslu2_eth[] = {
+ {
+ .name = "ixp4xx_eth",
+ .id = IXP4XX_ETH_NPEB,
+ .dev.platform_data = nslu2_plat_eth,
+ }
+};
+
+static struct platform_device *nslu2_devices[] __initdata = {
+ &nslu2_i2c_gpio,
+ &nslu2_flash,
+ &nslu2_beeper,
+ &nslu2_leds,
+ &nslu2_eth[0],
+};
+
+static void nslu2_power_off(void)
+{
+ /* This causes the box to drop the power and go dead. */
+
+ /* enable the pwr cntl gpio and assert power off */
+ gpio_direction_output(NSLU2_PO_GPIO, 1);
+}
+
+static irqreturn_t nslu2_power_handler(int irq, void *dev_id)
+{
+ /* Signal init to do the ctrlaltdel action, this will bypass init if
+ * it hasn't started and do a kernel_restart.
+ */
+ ctrl_alt_del();
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t nslu2_reset_handler(int irq, void *dev_id)
+{
+ /* This is the paper-clip reset, it shuts the machine down directly.
+ */
+ machine_power_off();
+
+ return IRQ_HANDLED;
+}
+
+static int __init nslu2_gpio_init(void)
+{
+ if (!machine_is_nslu2())
+ return 0;
+
+ /* Request the power off GPIO */
+ return gpio_request(NSLU2_PO_GPIO, "power off");
+}
+device_initcall(nslu2_gpio_init);
+
+static void __init nslu2_timer_init(void)
+{
+ /* The xtal on this machine is non-standard. */
+ ixp4xx_timer_freq = NSLU2_FREQ;
+
+ /* Call standard timer_init function. */
+ ixp4xx_timer_init();
+}
+
+static void __init nslu2_init(void)
+{
+ uint8_t __iomem *f;
+ int i;
+
+ ixp4xx_sys_init();
+
+ nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
+ nslu2_flash_resource.end =
+ IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
+
+ gpiod_add_lookup_table(&nslu2_i2c_gpiod_table);
+ i2c_register_board_info(0, nslu2_i2c_board_info,
+ ARRAY_SIZE(nslu2_i2c_board_info));
+
+ /*
+ * This is only useful on a modified machine, but it is valuable
+ * to have it first in order to see debug messages, and so that
+ * it does *not* get removed if platform_add_devices fails!
+ */
+ (void)platform_device_register(&nslu2_uart);
+
+ platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));
+
+ pm_power_off = nslu2_power_off;
+
+ if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler,
+ IRQF_TRIGGER_LOW, "NSLU2 reset button", NULL) < 0) {
+
+ printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
+ gpio_to_irq(NSLU2_RB_GPIO));
+ }
+
+ if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler,
+ IRQF_TRIGGER_HIGH, "NSLU2 power button", NULL) < 0) {
+
+ printk(KERN_DEBUG "Power Button IRQ %d not available\n",
+ gpio_to_irq(NSLU2_PB_GPIO));
+ }
+
+ /*
+ * Map in a portion of the flash and read the MAC address.
+ * Since it is stored in BE in the flash itself, we need to
+ * byteswap it if we're in LE mode.
+ */
+ f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x40000);
+ if (f) {
+ for (i = 0; i < 6; i++)
+#ifdef __ARMEB__
+ nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + i);
+#else
+ nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + (i^3));
+#endif
+ iounmap(f);
+ }
+ printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n",
+ nslu2_plat_eth[0].hwaddr);
+
+}
+
+MACHINE_START(NSLU2, "Linksys NSLU2")
+ /* Maintainer: www.nslu2-linux.org */
+ .atag_offset = 0x100,
+ .map_io = ixp4xx_map_io,
+ .init_early = ixp4xx_init_early,
+ .init_irq = ixp4xx_init_irq,
+ .init_time = nslu2_timer_init,
+ .init_machine = nslu2_init,
+#if defined(CONFIG_PCI)
+ .dma_zone_size = SZ_64M,
+#endif
+ .restart = ixp4xx_restart,
+MACHINE_END