diff --git a/arch/arm/mach-at91/at91rm9200_time.c b/arch/arm/mach-at91/at91rm9200_time.c
index 51761f8927b7..053ae0e3c3cb 100644
--- a/arch/arm/mach-at91/at91rm9200_time.c
+++ b/arch/arm/mach-at91/at91rm9200_time.c
@@ -138,6 +138,8 @@ clkevt32k_mode(enum clock_event_mode mode, struct clock_event_device *dev)
 	case CLOCK_EVT_MODE_RESUME:
 		irqmask = 0;
 		break;
+	default:
+		break;
 	}
 	at91_st_write(AT91_ST_IER, irqmask);
 }
diff --git a/arch/arm/mach-davinci/time.c b/arch/arm/mach-davinci/time.c
index 160c9602f490..59347b8e8228 100644
--- a/arch/arm/mach-davinci/time.c
+++ b/arch/arm/mach-davinci/time.c
@@ -326,6 +326,8 @@ static void davinci_set_mode(enum clock_event_mode mode,
 		break;
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/arm/mach-footbridge/dc21285-timer.c b/arch/arm/mach-footbridge/dc21285-timer.c
index bf7aa7d298e7..445965c216cd 100644
--- a/arch/arm/mach-footbridge/dc21285-timer.c
+++ b/arch/arm/mach-footbridge/dc21285-timer.c
@@ -74,6 +74,8 @@ static void ckevt_dc21285_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_SHUTDOWN:
 		*CSR_TIMER1_CNTL = 0;
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/arm/mach-imx/epit.c b/arch/arm/mach-imx/epit.c
index 074b1a81ba76..76b78f0ea739 100644
--- a/arch/arm/mach-imx/epit.c
+++ b/arch/arm/mach-imx/epit.c
@@ -152,6 +152,8 @@ static void epit_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_RESUME:
 		/* Left event sources disabled, no more interrupts appear */
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/arm/mach-imx/time.c b/arch/arm/mach-imx/time.c
index 15d18e198303..58c0423ef5f7 100644
--- a/arch/arm/mach-imx/time.c
+++ b/arch/arm/mach-imx/time.c
@@ -245,6 +245,8 @@ static void mxc_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_RESUME:
 		/* Left event sources disabled, no more interrupts appear */
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/arm/mach-lpc32xx/timer.c b/arch/arm/mach-lpc32xx/timer.c
index 4e5837299c04..027a6c5c77b6 100644
--- a/arch/arm/mach-lpc32xx/timer.c
+++ b/arch/arm/mach-lpc32xx/timer.c
@@ -64,6 +64,8 @@ static void lpc32xx_clkevt_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_UNUSED:
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/arm/mach-mmp/time.c b/arch/arm/mach-mmp/time.c
index 2756351dbb35..f38519135e00 100644
--- a/arch/arm/mach-mmp/time.c
+++ b/arch/arm/mach-mmp/time.c
@@ -140,6 +140,8 @@ static void timer_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_RESUME:
 	case CLOCK_EVT_MODE_PERIODIC:
 		break;
+	default:
+		break;
 	}
 	local_irq_restore(flags);
 }
diff --git a/arch/arm/mach-omap1/time.c b/arch/arm/mach-omap1/time.c
index a7588cfd0286..53242cc6c3fd 100644
--- a/arch/arm/mach-omap1/time.c
+++ b/arch/arm/mach-omap1/time.c
@@ -139,6 +139,8 @@ static void omap_mpu_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_SHUTDOWN:
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/arm/mach-omap1/timer32k.c b/arch/arm/mach-omap1/timer32k.c
index 107e7ab3edba..c21188c5b502 100644
--- a/arch/arm/mach-omap1/timer32k.c
+++ b/arch/arm/mach-omap1/timer32k.c
@@ -134,6 +134,8 @@ static void omap_32k_timer_set_mode(enum clock_event_mode mode,
 		break;
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index 7d45c84c69ba..15ea6af11933 100644
--- a/arch/arm/mach-omap2/timer.c
+++ b/arch/arm/mach-omap2/timer.c
@@ -126,6 +126,8 @@ static void omap2_gp_timer_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_SHUTDOWN:
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/arm/mach-sa1100/time.c b/arch/arm/mach-sa1100/time.c
index 1dea6cfafb31..e44c5b77169c 100644
--- a/arch/arm/mach-sa1100/time.c
+++ b/arch/arm/mach-sa1100/time.c
@@ -70,6 +70,8 @@ sa1100_osmr0_set_mode(enum clock_event_mode mode, struct clock_event_device *c)
 	case CLOCK_EVT_MODE_RESUME:
 	case CLOCK_EVT_MODE_PERIODIC:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/arm/mach-w90x900/time.c b/arch/arm/mach-w90x900/time.c
index 9230d3725599..5b9d9171bb95 100644
--- a/arch/arm/mach-w90x900/time.c
+++ b/arch/arm/mach-w90x900/time.c
@@ -70,6 +70,8 @@ static void nuc900_clockevent_setmode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_SHUTDOWN:
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 
 	__raw_writel(val, REG_TCSR0);
diff --git a/arch/blackfin/kernel/time-ts.c b/arch/blackfin/kernel/time-ts.c
index cb0a4845339e..fcb082c8993d 100644
--- a/arch/blackfin/kernel/time-ts.c
+++ b/arch/blackfin/kernel/time-ts.c
@@ -173,6 +173,8 @@ static void bfin_gptmr0_set_mode(enum clock_event_mode mode,
 		break;
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
@@ -279,6 +281,8 @@ static void bfin_coretmr_set_mode(enum clock_event_mode mode,
 		break;
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/c6x/platforms/timer64.c b/arch/c6x/platforms/timer64.c
index 3c73d74a4674..027c45417106 100644
--- a/arch/c6x/platforms/timer64.c
+++ b/arch/c6x/platforms/timer64.c
@@ -146,6 +146,8 @@ static void set_clock_mode(enum clock_event_mode mode,
 		break;
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/m68k/coldfire/pit.c b/arch/m68k/coldfire/pit.c
index 493b3111d4c1..373dc3c62b35 100644
--- a/arch/m68k/coldfire/pit.c
+++ b/arch/m68k/coldfire/pit.c
@@ -72,6 +72,8 @@ static void init_cf_pit_timer(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_RESUME:
 		/* Nothing to do here */
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c
index dd96f0e4bfa2..7eb95b73c7bf 100644
--- a/arch/microblaze/kernel/timer.c
+++ b/arch/microblaze/kernel/timer.c
@@ -142,6 +142,8 @@ static void xilinx_timer_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_RESUME:
 		pr_info("%s: resume\n", __func__);
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/mips/kernel/cevt-bcm1480.c b/arch/mips/kernel/cevt-bcm1480.c
index 7976457184b1..a08cd30c1d76 100644
--- a/arch/mips/kernel/cevt-bcm1480.c
+++ b/arch/mips/kernel/cevt-bcm1480.c
@@ -66,6 +66,8 @@ static void sibyte_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_UNUSED:	/* shuddup gcc */
 	case CLOCK_EVT_MODE_RESUME:
 		;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/mips/kernel/cevt-sb1250.c b/arch/mips/kernel/cevt-sb1250.c
index 5ea6d6b1de15..fdb7eed6dfd3 100644
--- a/arch/mips/kernel/cevt-sb1250.c
+++ b/arch/mips/kernel/cevt-sb1250.c
@@ -64,6 +64,8 @@ static void sibyte_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_UNUSED:	/* shuddup gcc */
 	case CLOCK_EVT_MODE_RESUME:
 		;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/mips/kernel/cevt-txx9.c b/arch/mips/kernel/cevt-txx9.c
index 2ae08462e46e..7f468a3c9a93 100644
--- a/arch/mips/kernel/cevt-txx9.c
+++ b/arch/mips/kernel/cevt-txx9.c
@@ -105,6 +105,8 @@ static void txx9tmr_set_mode(enum clock_event_mode mode,
 		__raw_writel(TIMER_CCD, &tmrptr->ccdr);
 		__raw_writel(0, &tmrptr->itmr);
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/mips/loongson/common/cs5536/cs5536_mfgpt.c b/arch/mips/loongson/common/cs5536/cs5536_mfgpt.c
index 12c75db23420..ec4a800b36dd 100644
--- a/arch/mips/loongson/common/cs5536/cs5536_mfgpt.c
+++ b/arch/mips/loongson/common/cs5536/cs5536_mfgpt.c
@@ -77,6 +77,8 @@ static void init_mfgpt_timer(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_RESUME:
 		/* Nothing to do here */
 		break;
+	default:
+		break;
 	}
 	raw_spin_unlock(&mfgpt_lock);
 }
diff --git a/arch/mips/loongson/loongson-3/hpet.c b/arch/mips/loongson/loongson-3/hpet.c
index e898d68668a9..7833f5d5757f 100644
--- a/arch/mips/loongson/loongson-3/hpet.c
+++ b/arch/mips/loongson/loongson-3/hpet.c
@@ -125,6 +125,8 @@ static void hpet_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_RESUME:
 		hpet_enable_legacy_int();
 		break;
+	default:
+		break;
 	}
 	spin_unlock(&hpet_lock);
 }
diff --git a/arch/mips/sni/time.c b/arch/mips/sni/time.c
index cf8ec568b9df..97e1678c4956 100644
--- a/arch/mips/sni/time.c
+++ b/arch/mips/sni/time.c
@@ -40,6 +40,8 @@ static void a20r_set_mode(enum clock_event_mode mode,
 		break;
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/nios2/kernel/time.c b/arch/nios2/kernel/time.c
index 7f4547418ee1..1c5103cf1729 100644
--- a/arch/nios2/kernel/time.c
+++ b/arch/nios2/kernel/time.c
@@ -181,6 +181,8 @@ static void nios2_timer_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_RESUME:
 		nios2_timer_start(timer);
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/openrisc/kernel/time.c b/arch/openrisc/kernel/time.c
index 7c52e9494a8d..ca82d2daf16e 100644
--- a/arch/openrisc/kernel/time.c
+++ b/arch/openrisc/kernel/time.c
@@ -68,6 +68,8 @@ static void openrisc_timer_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_RESUME:
 		pr_debug(KERN_INFO "%s: resume\n", __func__);
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/sparc/kernel/time_64.c b/arch/sparc/kernel/time_64.c
index edbbeb157d46..850ea2c476d7 100644
--- a/arch/sparc/kernel/time_64.c
+++ b/arch/sparc/kernel/time_64.c
@@ -704,6 +704,8 @@ static void sparc64_timer_setup(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_UNUSED:
 		WARN_ON(1);
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
index 117568d4f64a..8e0a5b4cce4f 100644
--- a/arch/um/kernel/time.c
+++ b/arch/um/kernel/time.c
@@ -38,6 +38,8 @@ static void itimer_set_mode(enum clock_event_mode mode,
 
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/unicore32/kernel/time.c b/arch/unicore32/kernel/time.c
index d3824b2ff644..179d7547edc5 100644
--- a/arch/unicore32/kernel/time.c
+++ b/arch/unicore32/kernel/time.c
@@ -60,6 +60,8 @@ puv3_osmr0_set_mode(enum clock_event_mode mode, struct clock_event_device *c)
 	case CLOCK_EVT_MODE_RESUME:
 	case CLOCK_EVT_MODE_PERIODIC:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index b665d241efad..e7141d8f108b 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -493,6 +493,8 @@ static void lapic_timer_setup(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_RESUME:
 		/* Nothing to do here */
 		break;
+	default:
+		break;
 	}
 
 	local_irq_restore(flags);
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index 319bcb9372fe..8c10da669d63 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -364,6 +364,8 @@ static void hpet_set_mode(enum clock_event_mode mode,
 		}
 		hpet_print_config();
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index c1c1544b8485..95b9705240ab 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -978,6 +978,8 @@ static void lguest_clockevent_set_mode(enum clock_event_mode mode,
 		BUG();
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/x86/platform/uv/uv_time.c b/arch/x86/platform/uv/uv_time.c
index a244237f3cfa..6612046adfe2 100644
--- a/arch/x86/platform/uv/uv_time.c
+++ b/arch/x86/platform/uv/uv_time.c
@@ -338,6 +338,8 @@ static void uv_rtc_timer_setup(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_SHUTDOWN:
 		uv_rtc_unset_timer(ced_cpu, 1);
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index 69087341d9ae..02e6d6f688a0 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -291,6 +291,8 @@ static void xen_timerop_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_SHUTDOWN:
 		HYPERVISOR_set_timer_op(0);  /* cancel timeout */
 		break;
+	default:
+		break;
 	}
 }
 
@@ -349,6 +351,8 @@ static void xen_vcpuop_set_mode(enum clock_event_mode mode,
 		break;
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/drivers/clocksource/cadence_ttc_timer.c b/drivers/clocksource/cadence_ttc_timer.c
index 510c8a1d37b3..f93d1d8b8a9a 100644
--- a/drivers/clocksource/cadence_ttc_timer.c
+++ b/drivers/clocksource/cadence_ttc_timer.c
@@ -224,6 +224,8 @@ static void ttc_set_mode(enum clock_event_mode mode,
 		writel_relaxed(ctrl_reg,
 				timer->base_addr + TTC_CNT_CNTRL_OFFSET);
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/drivers/clocksource/dw_apb_timer.c b/drivers/clocksource/dw_apb_timer.c
index f3656a6b0382..ddfd00325e43 100644
--- a/drivers/clocksource/dw_apb_timer.c
+++ b/drivers/clocksource/dw_apb_timer.c
@@ -173,6 +173,8 @@ static void apbt_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_RESUME:
 		apbt_enable_int(&dw_ced->timer);
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
index 83564c9cfdbe..e604e1c5eb12 100644
--- a/drivers/clocksource/exynos_mct.c
+++ b/drivers/clocksource/exynos_mct.c
@@ -306,6 +306,8 @@ static void exynos4_comp_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_SHUTDOWN:
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
@@ -410,6 +412,8 @@ static inline void exynos4_tick_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_SHUTDOWN:
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/drivers/clocksource/i8253.c b/drivers/clocksource/i8253.c
index 14ee3efcc404..d06c1df00e1e 100644
--- a/drivers/clocksource/i8253.c
+++ b/drivers/clocksource/i8253.c
@@ -136,6 +136,8 @@ static void init_pit_timer(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_RESUME:
 		/* Nothing to do here */
 		break;
+	default:
+		break;
 	}
 	raw_spin_unlock(&i8253_lock);
 }
diff --git a/drivers/clocksource/metag_generic.c b/drivers/clocksource/metag_generic.c
index b7384b853e5a..834dc25676b8 100644
--- a/drivers/clocksource/metag_generic.c
+++ b/drivers/clocksource/metag_generic.c
@@ -72,6 +72,8 @@ static void metag_timer_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_UNUSED:
 		WARN_ON(1);
 		break;
+	default:
+		break;
 	};
 }
 
diff --git a/drivers/clocksource/mxs_timer.c b/drivers/clocksource/mxs_timer.c
index 445b68a01dc5..afaf4e1f170b 100644
--- a/drivers/clocksource/mxs_timer.c
+++ b/drivers/clocksource/mxs_timer.c
@@ -190,6 +190,8 @@ static void mxs_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_RESUME:
 		/* Left event sources disabled, no more interrupts appear */
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/drivers/clocksource/nomadik-mtu.c b/drivers/clocksource/nomadik-mtu.c
index a709cfa49d85..0f75ac8cdddd 100644
--- a/drivers/clocksource/nomadik-mtu.c
+++ b/drivers/clocksource/nomadik-mtu.c
@@ -140,6 +140,8 @@ static void nmdk_clkevt_mode(enum clock_event_mode mode,
 		break;
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/drivers/clocksource/pxa_timer.c b/drivers/clocksource/pxa_timer.c
index 941f3f344e08..cb6b0bb74825 100644
--- a/drivers/clocksource/pxa_timer.c
+++ b/drivers/clocksource/pxa_timer.c
@@ -107,6 +107,8 @@ pxa_osmr0_set_mode(enum clock_event_mode mode, struct clock_event_device *dev)
 	case CLOCK_EVT_MODE_RESUME:
 	case CLOCK_EVT_MODE_PERIODIC:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/drivers/clocksource/qcom-timer.c b/drivers/clocksource/qcom-timer.c
index 098c542e5c53..9fadcde8eed7 100644
--- a/drivers/clocksource/qcom-timer.c
+++ b/drivers/clocksource/qcom-timer.c
@@ -95,6 +95,8 @@ static void msm_timer_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_UNUSED:
 	case CLOCK_EVT_MODE_SHUTDOWN:
 		break;
+	default:
+		break;
 	}
 	writel_relaxed(ctrl, event_base + TIMER_ENABLE);
 }
diff --git a/drivers/clocksource/rockchip_timer.c b/drivers/clocksource/rockchip_timer.c
index a35993bafb20..cf572f161d5c 100644
--- a/drivers/clocksource/rockchip_timer.c
+++ b/drivers/clocksource/rockchip_timer.c
@@ -98,6 +98,8 @@ static inline void rk_timer_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_SHUTDOWN:
 		rk_timer_disable(ce);
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/drivers/clocksource/samsung_pwm_timer.c b/drivers/clocksource/samsung_pwm_timer.c
index 5645cfc90c41..c4a34818011b 100644
--- a/drivers/clocksource/samsung_pwm_timer.c
+++ b/drivers/clocksource/samsung_pwm_timer.c
@@ -225,6 +225,8 @@ static void samsung_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_SHUTDOWN:
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/drivers/clocksource/tegra20_timer.c b/drivers/clocksource/tegra20_timer.c
index d2616ef16770..859ebe8728ce 100644
--- a/drivers/clocksource/tegra20_timer.c
+++ b/drivers/clocksource/tegra20_timer.c
@@ -90,6 +90,8 @@ static void tegra_timer_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_SHUTDOWN:
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/drivers/clocksource/time-efm32.c b/drivers/clocksource/time-efm32.c
index bba62f9deefb..67c5f5e43352 100644
--- a/drivers/clocksource/time-efm32.c
+++ b/drivers/clocksource/time-efm32.c
@@ -81,6 +81,8 @@ static void efm32_clock_event_set_mode(enum clock_event_mode mode,
 
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/drivers/clocksource/timer-atmel-pit.c b/drivers/clocksource/timer-atmel-pit.c
index b5b4d4585c9a..2c5e026b9fc3 100644
--- a/drivers/clocksource/timer-atmel-pit.c
+++ b/drivers/clocksource/timer-atmel-pit.c
@@ -116,6 +116,8 @@ pit_clkevt_mode(enum clock_event_mode mode, struct clock_event_device *dev)
 		break;
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/drivers/clocksource/timer-prima2.c b/drivers/clocksource/timer-prima2.c
index ce18d570e1cd..405400018e85 100644
--- a/drivers/clocksource/timer-prima2.c
+++ b/drivers/clocksource/timer-prima2.c
@@ -123,6 +123,8 @@ static void sirfsoc_timer_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_UNUSED:
 	case CLOCK_EVT_MODE_RESUME:
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/drivers/clocksource/timer-u300.c b/drivers/clocksource/timer-u300.c
index 5dcf756970e7..746f65ed13b0 100644
--- a/drivers/clocksource/timer-u300.c
+++ b/drivers/clocksource/timer-u300.c
@@ -265,6 +265,8 @@ static void u300_set_mode(enum clock_event_mode mode,
 	case CLOCK_EVT_MODE_RESUME:
 		/* Ignore this call */
 		break;
+	default:
+		break;
 	}
 }
 
diff --git a/drivers/clocksource/vt8500_timer.c b/drivers/clocksource/vt8500_timer.c
index 1098ed3b9b89..ca982352a637 100644
--- a/drivers/clocksource/vt8500_timer.c
+++ b/drivers/clocksource/vt8500_timer.c
@@ -102,6 +102,8 @@ static void vt8500_timer_set_mode(enum clock_event_mode mode,
 			regbase + TIMER_CTRL_VAL);
 		writel(0, regbase + TIMER_IER_VAL);
 		break;
+	default:
+		break;
 	}
 }
 
