diff options
Diffstat (limited to 'arch/loongarch/kernel/env.c')
| -rw-r--r-- | arch/loongarch/kernel/env.c | 45 |
1 files changed, 43 insertions, 2 deletions
diff --git a/arch/loongarch/kernel/env.c b/arch/loongarch/kernel/env.c index 6d56a463b091..23bd5ae2212c 100644 --- a/arch/loongarch/kernel/env.c +++ b/arch/loongarch/kernel/env.c @@ -5,12 +5,16 @@ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited */ #include <linux/acpi.h> +#include <linux/clk.h> #include <linux/efi.h> #include <linux/export.h> #include <linux/memblock.h> +#include <linux/of_clk.h> #include <asm/early_ioremap.h> #include <asm/bootinfo.h> #include <asm/loongson.h> +#include <asm/setup.h> +#include <asm/time.h> u64 efi_system_table; struct loongson_system_configuration loongson_sysconf; @@ -27,6 +31,7 @@ void __init init_environ(void) clear_bit(EFI_BOOT, &efi.flags); strscpy(boot_command_line, cmdline, COMMAND_LINE_SIZE); + strscpy(init_command_line, cmdline, COMMAND_LINE_SIZE); early_memunmap(cmdline, COMMAND_LINE_SIZE); efi_system_table = fw_arg2; @@ -34,7 +39,19 @@ void __init init_environ(void) static int __init init_cpu_fullname(void) { - int cpu; + int cpu, ret; + char *cpuname; + const char *model; + struct device_node *root; + + /* Parsing cpuname from DTS model property */ + root = of_find_node_by_path("/"); + ret = of_property_read_string(root, "model", &model); + if (ret == 0) { + cpuname = kstrdup(model, GFP_KERNEL); + loongson_sysconf.cpuname = strsep(&cpuname, " "); + } + of_node_put(root); if (loongson_sysconf.cpuname && !strncmp(loongson_sysconf.cpuname, "Loongson", 8)) { for (cpu = 0; cpu < NR_CPUS; cpu++) @@ -44,10 +61,32 @@ static int __init init_cpu_fullname(void) } arch_initcall(init_cpu_fullname); +static int __init fdt_cpu_clk_init(void) +{ + struct clk *clk; + struct device_node *np; + + np = of_get_cpu_node(0, NULL); + if (!np) + return -ENODEV; + + clk = of_clk_get(np, 0); + of_node_put(np); + + if (IS_ERR(clk)) + return -ENODEV; + + cpu_clock_freq = clk_get_rate(clk); + clk_put(clk); + + return 0; +} +late_initcall(fdt_cpu_clk_init); + static ssize_t boardinfo_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { - return sprintf(buf, + return sysfs_emit(buf, "BIOS Information\n" "Vendor\t\t\t: %s\n" "Version\t\t\t: %s\n" @@ -70,6 +109,8 @@ static int __init boardinfo_init(void) struct kobject *loongson_kobj; loongson_kobj = kobject_create_and_add("loongson", firmware_kobj); + if (!loongson_kobj) + return -ENOMEM; return sysfs_create_file(loongson_kobj, &boardinfo_attr.attr); } |