mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 02:30:34 +02:00
95b56e884a
Get the fixed-clock from the CPU0 node of the device tree. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Qing Zhang <zhangqing@loongson.cn> Tested-by: Ming Wang <wangming01@loongson.cn> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
47 lines
929 B
C
47 lines
929 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
|
|
* Author: Fuxin Zhang, zhangfx@lemote.com
|
|
*
|
|
* Copyright (C) 2009 Lemote Inc.
|
|
* Author: Wu Zhangjin, wuzhangjin@gmail.com
|
|
*/
|
|
|
|
#include <asm/time.h>
|
|
#include <asm/hpet.h>
|
|
|
|
#include <loongson.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/of_clk.h>
|
|
|
|
void __init plat_time_init(void)
|
|
{
|
|
struct clk *clk;
|
|
struct device_node *np;
|
|
|
|
if (loongson_sysconf.fw_interface == LOONGSON_DTB) {
|
|
of_clk_init(NULL);
|
|
|
|
np = of_get_cpu_node(0, NULL);
|
|
if (!np) {
|
|
pr_err("Failed to get CPU node\n");
|
|
return;
|
|
}
|
|
|
|
clk = of_clk_get(np, 0);
|
|
if (IS_ERR(clk)) {
|
|
pr_err("Failed to get CPU clock: %ld\n", PTR_ERR(clk));
|
|
return;
|
|
}
|
|
|
|
cpu_clock_freq = clk_get_rate(clk);
|
|
clk_put(clk);
|
|
}
|
|
|
|
/* setup mips r4k timer */
|
|
mips_hpt_frequency = cpu_clock_freq / 2;
|
|
|
|
#ifdef CONFIG_RS780_HPET
|
|
setup_hpet_timer();
|
|
#endif
|
|
}
|