diff --git a/src/jtag/drivers/am335xgpio.c b/src/jtag/drivers/am335xgpio.c
index cfe41c3be..9bb7ea7d1 100644
--- a/src/jtag/drivers/am335xgpio.c
+++ b/src/jtag/drivers/am335xgpio.c
@@ -275,10 +275,10 @@ static int am335xgpio_swdio_read(void)
 	return get_gpio_value(&adapter_gpio_config[ADAPTER_GPIO_IDX_SWDIO]);
 }
 
-static int am335xgpio_blink(int on)
+static int am335xgpio_blink(bool on)
 {
 	if (is_gpio_config_valid(&adapter_gpio_config[ADAPTER_GPIO_IDX_LED]))
-		set_gpio_value(&adapter_gpio_config[ADAPTER_GPIO_IDX_LED], on);
+		set_gpio_value(&adapter_gpio_config[ADAPTER_GPIO_IDX_LED], on ? 1 : 0);
 
 	return ERROR_OK;
 }
diff --git a/src/jtag/drivers/bcm2835gpio.c b/src/jtag/drivers/bcm2835gpio.c
index b8d91bf38..2c2061dae 100644
--- a/src/jtag/drivers/bcm2835gpio.c
+++ b/src/jtag/drivers/bcm2835gpio.c
@@ -419,10 +419,10 @@ static void bcm2835gpio_munmap(void)
 	}
 }
 
-static int bcm2835gpio_blink(int on)
+static int bcm2835gpio_blink(bool on)
 {
 	if (is_gpio_config_valid(ADAPTER_GPIO_IDX_LED))
-		set_gpio_value(&adapter_gpio_config[ADAPTER_GPIO_IDX_LED], on);
+		set_gpio_value(&adapter_gpio_config[ADAPTER_GPIO_IDX_LED], on ? 1 : 0);
 
 	return ERROR_OK;
 }
diff --git a/src/jtag/drivers/bitbang.c b/src/jtag/drivers/bitbang.c
index 17e01a233..42234a6f7 100644
--- a/src/jtag/drivers/bitbang.c
+++ b/src/jtag/drivers/bitbang.c
@@ -309,7 +309,7 @@ int bitbang_execute_queue(struct jtag_command *cmd_queue)
 	retval = ERROR_OK;
 
 	if (bitbang_interface->blink) {
-		if (bitbang_interface->blink(1) != ERROR_OK)
+		if (bitbang_interface->blink(true) != ERROR_OK)
 			return ERROR_FAIL;
 	}
 
@@ -377,7 +377,7 @@ int bitbang_execute_queue(struct jtag_command *cmd_queue)
 		cmd = cmd->next;
 	}
 	if (bitbang_interface->blink) {
-		if (bitbang_interface->blink(0) != ERROR_OK)
+		if (bitbang_interface->blink(false) != ERROR_OK)
 			return ERROR_FAIL;
 	}
 
@@ -396,7 +396,7 @@ static void bitbang_swd_exchange(bool rnw, uint8_t buf[], unsigned int offset, u
 {
 	if (bitbang_interface->blink) {
 		/* FIXME: we should manage errors */
-		bitbang_interface->blink(1);
+		bitbang_interface->blink(true);
 	}
 
 	for (unsigned int i = offset; i < bit_cnt + offset; i++) {
@@ -418,7 +418,7 @@ static void bitbang_swd_exchange(bool rnw, uint8_t buf[], unsigned int offset, u
 
 	if (bitbang_interface->blink) {
 		/* FIXME: we should manage errors */
-		bitbang_interface->blink(0);
+		bitbang_interface->blink(false);
 	}
 }
 
diff --git a/src/jtag/drivers/bitbang.h b/src/jtag/drivers/bitbang.h
index dc941796e..82405eb8a 100644
--- a/src/jtag/drivers/bitbang.h
+++ b/src/jtag/drivers/bitbang.h
@@ -45,7 +45,7 @@ struct bitbang_interface {
 	int (*write)(int tck, int tms, int tdi);
 
 	/** Blink led (optional). */
-	int (*blink)(int on);
+	int (*blink)(bool on);
 
 	/** Sample SWDIO and return the value. */
 	int (*swdio_read)(void);
diff --git a/src/jtag/drivers/dummy.c b/src/jtag/drivers/dummy.c
index 1b1e57392..4fe598fe3 100644
--- a/src/jtag/drivers/dummy.c
+++ b/src/jtag/drivers/dummy.c
@@ -72,7 +72,7 @@ static int dummy_reset(int trst, int srst)
 	return ERROR_OK;
 }
 
-static int dummy_led(int on)
+static int dummy_led(bool on)
 {
 	return ERROR_OK;
 }
diff --git a/src/jtag/drivers/linuxgpiod.c b/src/jtag/drivers/linuxgpiod.c
index 1926ed9ae..fa14e42d6 100644
--- a/src/jtag/drivers/linuxgpiod.c
+++ b/src/jtag/drivers/linuxgpiod.c
@@ -178,14 +178,14 @@ static int linuxgpiod_swd_write(int swclk, int swdio)
 	return ERROR_OK;
 }
 
-static int linuxgpiod_blink(int on)
+static int linuxgpiod_blink(bool on)
 {
 	int retval;
 
 	if (!is_gpio_config_valid(ADAPTER_GPIO_IDX_LED))
 		return ERROR_OK;
 
-	retval = gpiod_line_set_value(gpiod_line[ADAPTER_GPIO_IDX_LED], on);
+	retval = gpiod_line_set_value(gpiod_line[ADAPTER_GPIO_IDX_LED], on ? 1 : 0);
 	if (retval < 0)
 		LOG_WARNING("Fail set led");
 	return retval;
diff --git a/src/jtag/drivers/parport.c b/src/jtag/drivers/parport.c
index d26a51048..d03d3b89c 100644
--- a/src/jtag/drivers/parport.c
+++ b/src/jtag/drivers/parport.c
@@ -183,8 +183,8 @@ static int parport_reset(int trst, int srst)
 	return ERROR_OK;
 }
 
-/* turn LED on parport adapter on (1) or off (0) */
-static int parport_led(int on)
+/* turn LED on parport adapter on (true) or off (true) */
+static int parport_led(bool on)
 {
 	if (on)
 		dataport_value |= cable->LED_MASK;
@@ -364,7 +364,7 @@ static int parport_init(void)
 		return ERROR_FAIL;
 	if (parport_write(0, 0, 0) != ERROR_OK)
 		return ERROR_FAIL;
-	if (parport_led(1) != ERROR_OK)
+	if (parport_led(true) != ERROR_OK)
 		return ERROR_FAIL;
 
 	bitbang_interface = &parport_bitbang;
@@ -374,7 +374,7 @@ static int parport_init(void)
 
 static int parport_quit(void)
 {
-	if (parport_led(0) != ERROR_OK)
+	if (parport_led(false) != ERROR_OK)
 		return ERROR_FAIL;
 
 	if (parport_exit) {
diff --git a/src/jtag/drivers/remote_bitbang.c b/src/jtag/drivers/remote_bitbang.c
index edd36f2e6..91a8532b7 100644
--- a/src/jtag/drivers/remote_bitbang.c
+++ b/src/jtag/drivers/remote_bitbang.c
@@ -251,7 +251,7 @@ static int remote_bitbang_sleep(unsigned int microseconds)
 	return remote_bitbang_flush();
 }
 
-static int remote_bitbang_blink(int on)
+static int remote_bitbang_blink(bool on)
 {
 	char c = on ? 'B' : 'b';
 	return remote_bitbang_queue(c, FLUSH_SEND_BUF);