From: Qing Zhang <zhangqing@loongson.cn>
To: Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Thomas Gleixner <tglx@linutronix.de>,
Marc Zyngier <maz@kernel.org>,
Huacai Chen <chenhuacai@kernel.org>,
Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
devicetree@vger.kernel.org, Ming Wang <wangming01@loongson.cn>
Subject: [PATCH v5 3/7] MIPS: Loongson64: Add support for the Loongson-2K1000 to get cpu_clock_freq
Date: Mon, 15 Mar 2021 15:50:00 +0800 [thread overview]
Message-ID: <20210315075004.15465-4-zhangqing@loongson.cn> (raw)
In-Reply-To: <20210315075004.15465-1-zhangqing@loongson.cn>
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>
---
v4-v5:
- Delete clk initializer
arch/mips/loongson64/time.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/arch/mips/loongson64/time.c b/arch/mips/loongson64/time.c
index 91e842b58365..f6d2c1e30570 100644
--- a/arch/mips/loongson64/time.c
+++ b/arch/mips/loongson64/time.c
@@ -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;
--
2.20.1
next prev parent reply other threads:[~2021-03-15 7:51 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-15 7:49 [PATCH v5 0/7] Add basic support for Loongson-2K1000 Qing Zhang
2021-03-15 7:49 ` [PATCH v5 1/7] MIPS: Loongson64: DeviceTree " Qing Zhang
2021-03-15 7:49 ` [PATCH v5 2/7] MIPS: Loongson64: Distinguish firmware dependencies DTB/LEFI Qing Zhang
2021-03-15 7:50 ` Qing Zhang [this message]
2021-03-15 7:50 ` [PATCH v5 4/7] MIPS: Loongson64: Add Loongson-2K1000 early_printk_port Qing Zhang
2021-03-15 7:50 ` [PATCH v5 5/7] irqchip/loongson-liointc: irqchip add 2.0 version Qing Zhang
2021-03-24 9:58 ` Thomas Bogendoerfer
2021-03-24 12:53 ` Marc Zyngier
2021-03-15 7:50 ` [PATCH v5 6/7] dt-bindings: interrupt-controller: Add Loongson-2K1000 LIOINTC Qing Zhang
2021-03-23 22:41 ` Rob Herring
2021-03-15 7:50 ` [PATCH v5 7/7] MIPS: Loongson64: Add a Loongson-2K1000 default config file Qing Zhang
2021-03-20 9:28 ` [PATCH v5 0/7] Add basic support for Loongson-2K1000 zhangqing
2021-03-25 9:58 ` Thomas Bogendoerfer
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