1 // SPDX-License-Identifier: GPL-2.0-only
3 * Setup for the Realtek RTL838X SoC:
4 * Memory, Timer and Serial
6 * Copyright (C) 2020 B. Koblitz
7 * based on the original BSP by
8 * Copyright (C) 2006-2012 Tony Wu (tonywu@realtek.com)
12 #include <linux/console.h>
13 #include <linux/init.h>
14 #include <linux/clkdev.h>
15 #include <linux/clk-provider.h>
16 #include <linux/delay.h>
17 #include <linux/of_fdt.h>
18 #include <linux/irqchip.h>
20 #include <asm/addrspace.h>
22 #include <asm/bootinfo.h>
25 #include <asm/smp-ops.h>
27 #include "mach-rtl83xx.h"
29 extern struct rtl83xx_soc_info soc_info
;
31 void __init
plat_mem_setup(void)
35 set_io_port_base(KSEG1
);
37 if (fw_passed_dtb
) /* UHI interface */
38 dtb
= (void *)fw_passed_dtb
;
39 else if (&__dtb_start
[0] != &__dtb_end
[0])
40 dtb
= (void *)__dtb_start
;
42 panic("no dtb found");
45 * Load the devicetree. This causes the chosen node to be
46 * parsed resulting in our memory appearing
51 void __init
plat_time_init(void)
53 struct device_node
*np
;
59 np
= of_find_node_by_name(NULL
, "cpus");
61 pr_err("Missing 'cpus' DT node, using default frequency.");
63 if (of_property_read_u32(np
, "frequency", &freq
) < 0)
64 pr_err("No 'frequency' property in DT, using default.");
66 pr_info("CPU frequency from device tree: %dMHz", freq
/ 1000000);
70 mips_hpt_frequency
= freq
/ 2;
73 void __init
arch_init_irq(void)