Commit 95b56e88 authored by Qing Zhang's avatar Qing Zhang Committed by Thomas Bogendoerfer
Browse files

MIPS: Loongson64: Add support for the Loongson-2K1000 to get cpu_clock_freq 



Get the fixed-clock from the CPU0 node of the device tree.

Signed-off-by: default avatarJiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: default avatarQing Zhang <zhangqing@loongson.cn>
Tested-by: default avatarMing Wang <wangming01@loongson.cn>
Signed-off-by: default avatarThomas Bogendoerfer <tsbogend@alpha.franken.de>
parent 8e2fe0ec

arch/mips/loongson64/time.c

+24 −0
Original line number Diff line number Diff line
@@ -11,9 +11,33 @@ 
#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;