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Subject[PATCH 3/6] MIPS: Loongson64: Add support for the 2K1000 to get cpu_clock_freq
Date
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>
Signed-off-by: Xingxing Su <suxingxing@loongson.cn>
---
arch/mips/loongson64/time.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/arch/mips/loongson64/time.c b/arch/mips/loongson64/time.c
index 91e842b58365..45698b18f4ae 100644
--- a/arch/mips/loongson64/time.c
+++ b/arch/mips/loongson64/time.c
@@ -11,9 +11,23 @@
#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 = NULL;
+ struct device_node *np;
+
+ of_clk_init(NULL);
+
+ np = of_get_cpu_node(0, NULL);
+ clk = of_clk_get(np, 0);
+ if (clk) {
+ cpu_clock_freq = clk_get_rate(clk);
+ clk_put(clk);
+ }
+
/* setup mips r4k timer */
mips_hpt_frequency = cpu_clock_freq / 2;

--
2.20.1
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