a029ccc810
This node pointer is returned by of_find_compatible_node() with
refcount incremented in ls2k_reset_init(). Calling of_node_put()
to aovid the refcount leak.
Fixes: 7eb7819a2e ("MIPS: Loongson64: Add Loongson-2K1000 reset platform driver")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (C) 2021, Qing Zhang <zhangqing@loongson.cn>
|
|
* Loongson-2K1000 reset support
|
|
*/
|
|
|
|
#include <linux/of_address.h>
|
|
#include <linux/pm.h>
|
|
#include <asm/reboot.h>
|
|
|
|
#define PM1_STS 0x0c /* Power Management 1 Status Register */
|
|
#define PM1_CNT 0x14 /* Power Management 1 Control Register */
|
|
#define RST_CNT 0x30 /* Reset Control Register */
|
|
|
|
static void __iomem *base;
|
|
|
|
static void ls2k_restart(char *command)
|
|
{
|
|
writel(0x1, base + RST_CNT);
|
|
}
|
|
|
|
static void ls2k_poweroff(void)
|
|
{
|
|
/* Clear */
|
|
writel((readl(base + PM1_STS) & 0xffffffff), base + PM1_STS);
|
|
/* Sleep Enable | Soft Off*/
|
|
writel(GENMASK(12, 10) | BIT(13), base + PM1_CNT);
|
|
}
|
|
|
|
static int ls2k_reset_init(void)
|
|
{
|
|
struct device_node *np;
|
|
|
|
np = of_find_compatible_node(NULL, NULL, "loongson,ls2k-pm");
|
|
if (!np) {
|
|
pr_info("Failed to get PM node\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
base = of_iomap(np, 0);
|
|
of_node_put(np);
|
|
if (!base) {
|
|
pr_info("Failed to map PM register base address\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
_machine_restart = ls2k_restart;
|
|
pm_power_off = ls2k_poweroff;
|
|
|
|
return 0;
|
|
}
|
|
|
|
arch_initcall(ls2k_reset_init);
|