diff options
author | Qing Zhang <zhangqing@loongson.cn> | 2021-03-15 15:50:00 +0800 |
---|---|---|
committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2021-03-25 10:44:01 +0100 |
commit | 95b56e884a50c8e935b4e9f8b289251cc913795e (patch) | |
tree | fe00466401bf05d944bc2ce179ded8df7bcf4b45 /arch/mips/loongson64 | |
parent | 8e2fe0ecfb96d7b1baa9720e36305515c3079e8c (diff) | |
download | linux-95b56e884a50c8e935b4e9f8b289251cc913795e.tar.gz linux-95b56e884a50c8e935b4e9f8b289251cc913795e.tar.bz2 linux-95b56e884a50c8e935b4e9f8b289251cc913795e.zip |
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: 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>
Diffstat (limited to 'arch/mips/loongson64')
-rw-r--r-- | arch/mips/loongson64/time.c | 24 |
1 files changed, 24 insertions, 0 deletions
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; |