-Wimplicit-fallthrough=1

4 files changed, 5 insertions, 0 deletions

diff --git a/avr/cmd_boot.c b/avr/cmd_boot.c
index fb533c7..bba510f 100644
--- a/avr/cmd_boot.c
+++ b/avr/cmd_boot.c
@@ -379,6 +379,7 @@ command_ret_t do_console(cmd_tbl_t *cmdtp UNUSED, uint_fast8_t flag UNUSED, int
 			case 2:
 				my_puts_P(PSTR("\n"
 				  "------------------------------------------------\n"));
+				/* FALL TROUGH */
 			case 1:
 				state = 0;
 				switch (toupper(ch)) {
diff --git a/avr/cmd_gpio.c b/avr/cmd_gpio.c
index 549654f..32bd53a 100644
--- a/avr/cmd_gpio.c
+++ b/avr/cmd_gpio.c
@@ -247,6 +247,7 @@ command_ret_t do_gpio(cmd_tbl_t *cmdtp UNUSED, uint_fast8_t flag UNUSED, int arg
 		switch (toupper(argv[optind][0])) {
 		case 'H':
 			level = 1;
+			/* FALL TROUGH */
 		case 'L':
 			mode = OUTPUT;
 			break;
@@ -263,6 +264,7 @@ command_ret_t do_gpio(cmd_tbl_t *cmdtp UNUSED, uint_fast8_t flag UNUSED, int arg
 			switch (*endp) {
 			case 'M':
 				value *= 1000;
+				/* FALL TROUGH */
 			case 'K':
 				value *= 1000;
 				endp++;
diff --git a/avr/env.c b/avr/env.c
index 671d1c4..900f689 100644
--- a/avr/env.c
+++ b/avr/env.c
@@ -63,6 +63,7 @@ char env_get_char(uint_fast16_t index)
 	switch (env_valid) {
 	case 2:
 		off += CONFIG_ENV_SIZE;
+		/* FALL TROUGH */
 	case 1:
 		ret = (char) eeprom_read_byte((const uint8_t *)off + index +
 				offsetof(env_t, data));
diff --git a/avr/gpio.c b/avr/gpio.c
index 73e9c39..6f73cee 100644
--- a/avr/gpio.c
+++ b/avr/gpio.c
@@ -148,6 +148,7 @@ int gpio_config(int pin, gpiomode_t mode)
 			break;
 		case OUTPUT:
 			gpio_timer_off(pinlist[pin].timer);
+			/* FALL TROUGH */
 		case OUTPUT_TIMER:
 			ATOMIC_BLOCK(ATOMIC_FORCEON) {
 				p->ddr |= bit;