diff --git a/arch/loongarch/include/asm/cpu-info.h b/arch/loongarch/include/asm/cpu-info.h
index 900589cb159d..35e0a230a484 100644
--- a/arch/loongarch/include/asm/cpu-info.h
+++ b/arch/loongarch/include/asm/cpu-info.h
@@ -57,6 +57,7 @@ struct cpuinfo_loongarch {
 	int			global_id; /* physical global thread number */
 	int			vabits; /* Virtual Address size in bits */
 	int			pabits; /* Physical Address size in bits */
+	int			timerbits; /* Width of arch timer in bits */
 	unsigned int		ksave_mask; /* Usable KSave mask. */
 	unsigned int		watch_dreg_count;   /* Number data breakpoints */
 	unsigned int		watch_ireg_count;   /* Number instruction breakpoints */
diff --git a/arch/loongarch/include/asm/loongarch.h b/arch/loongarch/include/asm/loongarch.h
index 64ad277e096e..a3cc4f8d4c4a 100644
--- a/arch/loongarch/include/asm/loongarch.h
+++ b/arch/loongarch/include/asm/loongarch.h
@@ -466,7 +466,6 @@
 
 #define LOONGARCH_CSR_TCFG		0x41	/* Timer config */
 #define  CSR_TCFG_VAL_SHIFT		2
-#define	 CSR_TCFG_VAL_WIDTH		48
 #define  CSR_TCFG_VAL			(_ULCAST_(0x3fffffffffff) << CSR_TCFG_VAL_SHIFT)
 #define  CSR_TCFG_PERIOD_SHIFT		1
 #define  CSR_TCFG_PERIOD		(_ULCAST_(0x1) << CSR_TCFG_PERIOD_SHIFT)
diff --git a/arch/loongarch/kernel/cpu-probe.c b/arch/loongarch/kernel/cpu-probe.c
index cbce099037b2..fedaa67cde41 100644
--- a/arch/loongarch/kernel/cpu-probe.c
+++ b/arch/loongarch/kernel/cpu-probe.c
@@ -190,6 +190,7 @@ static void cpu_probe_common(struct cpuinfo_loongarch *c)
 	set_cpu_asid_mask(c, asid_mask);
 
 	config = read_csr_prcfg1();
+	c->timerbits = (config & CSR_CONF1_TMRBITS) >> CSR_CONF1_TMRBITS_SHIFT;
 	c->ksave_mask = GENMASK((config & CSR_CONF1_KSNUM) - 1, 0);
 	c->ksave_mask &= ~(EXC_KSAVE_MASK | PERCPU_KSAVE_MASK | KVM_KSAVE_MASK);
 
diff --git a/arch/loongarch/kernel/time.c b/arch/loongarch/kernel/time.c
index a07d7eff4dc5..e2d3bfeb6366 100644
--- a/arch/loongarch/kernel/time.c
+++ b/arch/loongarch/kernel/time.c
@@ -132,7 +132,7 @@ int constant_clockevent_init(void)
 #else
 	unsigned long min_delta = 1000;
 #endif
-	unsigned long max_delta = (1UL << 48) - 1;
+	unsigned long max_delta = GENMASK_ULL(boot_cpu_data.timerbits, 0);
 	struct clock_event_device *cd;
 	static int irq = 0, timer_irq_installed = 0;