mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
35fb26f94d
Add platform support for EcoNet MIPS SoCs. Signed-off-by: Caleb James DeLisle <cjd@cjdns.fr> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
78 lines
1.4 KiB
C
78 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* EcoNet setup code
|
|
*
|
|
* Copyright (C) 2025 Caleb James DeLisle <cjd@cjdns.fr>
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/of_clk.h>
|
|
#include <linux/irqchip.h>
|
|
|
|
#include <asm/addrspace.h>
|
|
#include <asm/io.h>
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/time.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/smp-ops.h>
|
|
#include <asm/reboot.h>
|
|
|
|
#define CR_AHB_RSTCR ((void __iomem *)CKSEG1ADDR(0x1fb00040))
|
|
#define RESET BIT(31)
|
|
|
|
#define UART_BASE CKSEG1ADDR(0x1fbf0003)
|
|
#define UART_REG_SHIFT 2
|
|
|
|
static void hw_reset(char *command)
|
|
{
|
|
iowrite32(RESET, CR_AHB_RSTCR);
|
|
}
|
|
|
|
/* 1. Bring up early printk. */
|
|
void __init prom_init(void)
|
|
{
|
|
setup_8250_early_printk_port(UART_BASE, UART_REG_SHIFT, 0);
|
|
_machine_restart = hw_reset;
|
|
}
|
|
|
|
/* 2. Parse the DT and find memory */
|
|
void __init plat_mem_setup(void)
|
|
{
|
|
void *dtb;
|
|
|
|
set_io_port_base(KSEG1);
|
|
|
|
dtb = get_fdt();
|
|
if (!dtb)
|
|
panic("no dtb found");
|
|
|
|
__dt_setup_arch(dtb);
|
|
|
|
early_init_dt_scan_memory();
|
|
}
|
|
|
|
/* 3. Overload __weak device_tree_init(), add SMP_UP ops */
|
|
void __init device_tree_init(void)
|
|
{
|
|
unflatten_and_copy_device_tree();
|
|
|
|
register_up_smp_ops();
|
|
}
|
|
|
|
const char *get_system_type(void)
|
|
{
|
|
return "EcoNet-EN75xx";
|
|
}
|
|
|
|
/* 4. Initialize the IRQ subsystem */
|
|
void __init arch_init_irq(void)
|
|
{
|
|
irqchip_init();
|
|
}
|
|
|
|
/* 5. Timers */
|
|
void __init plat_time_init(void)
|
|
{
|
|
of_clk_init(NULL);
|
|
timer_probe();
|
|
}
|